mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 01:55:48 -05:00
Antenna Tools: Add surface error parameter for dish gain calculation. Fix focal length units
This commit is contained in:
Jon Beniston
parent
904c1f6add
commit
d65d32337b
@ -157,6 +157,7 @@ void AntennaToolsGUI::displaySettings()
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ui->dishDepth->setValue(m_settings.m_dishDepth);
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ui->dishLengthUnits->setCurrentIndex((int)m_settings.m_dishLengthUnits);
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ui->dishEfficiency->setValue(m_settings.m_dishEfficiency);
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ui->dishSurfaceError->setValue(m_settings.m_dishSurfaceError);
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blockApplySettings(false);
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calcDipoleLength();
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calcDishFocalLength();
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@ -372,6 +373,17 @@ double AntennaToolsGUI::dishLengthMetres(double length) const
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}
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}
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double AntennaToolsGUI::dishMetresToLength(double m) const
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{
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if (m_settings.m_dishLengthUnits == AntennaToolsSettings::CM) {
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return m * 100.0;
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} else if (m_settings.m_dishLengthUnits == AntennaToolsSettings::M) {
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return m;
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} else {
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return Units::metresToFeet(m);
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}
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}
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double AntennaToolsGUI::dishDiameterMetres() const
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{
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return dishLengthMetres(m_settings.m_dishDiameter);
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@ -382,11 +394,16 @@ double AntennaToolsGUI::dishDepthMetres() const
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return dishLengthMetres(m_settings.m_dishDepth);
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}
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double AntennaToolsGUI::dishSurfaceErrorMetres() const
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{
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return dishLengthMetres(m_settings.m_dishSurfaceError);
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}
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void AntennaToolsGUI::calcDishFocalLength()
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{
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double d = dishDiameterMetres();
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double focalLength = d * d / (16.0 * dishDepthMetres());
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ui->dishFocalLength->setValue(focalLength);
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ui->dishFocalLength->setValue(dishMetresToLength(focalLength));
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double fd = focalLength / d;
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ui->dishFD->setValue(fd);
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}
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@ -401,6 +418,9 @@ void AntennaToolsGUI::calcDishGain()
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{
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double t = M_PI * dishDiameterMetres() / dishLambda();
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double gainDB = 10.0 * log10((m_settings.m_dishEfficiency/100.0) * (t*t));
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// Adjust for surface error using Ruze's equation
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t = dishSurfaceErrorMetres() / dishLambda();
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gainDB = gainDB - 685.81 * t * t;
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ui->dishGain->setValue(gainDB);
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}
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@ -458,6 +478,13 @@ void AntennaToolsGUI::on_dishEfficiency_valueChanged(int value)
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calcDishGain();
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}
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void AntennaToolsGUI::on_dishSurfaceError_valueChanged(double value)
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{
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m_settings.m_dishSurfaceError= value;
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applySettings();
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calcDishGain();
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}
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double AntennaToolsGUI::getDeviceSetFrequencyMHz(int index)
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{
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std::vector<DeviceSet*> deviceSets = MainCore::instance()->getDeviceSets();
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@ -76,9 +76,10 @@ private:
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void calcDishGain();
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double dishLambda() const;
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double dishLengthMetres(double length) const;
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double dishMetresToLength(double m) const;
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double dishDiameterMetres() const;
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double dishDepthMetres() const;
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double dishSurfaceErrorMetres() const;
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double getDeviceSetFrequencyMHz(int index);
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private slots:
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@ -94,6 +95,7 @@ private slots:
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void on_dishLengthUnits_currentIndexChanged(int index);
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void on_dishDepth_valueChanged(double value);
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void on_dishEfficiency_valueChanged(int value);
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void on_dishSurfaceError_valueChanged(double value);
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void onMenuDialogCalled(const QPoint &p);
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void onWidgetRolled(QWidget* widget, bool rollDown);
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void handleInputMessages();
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@ -7,7 +7,7 @@
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<x>0</x>
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<y>0</y>
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<width>377</width>
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<height>461</height>
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<height>499</height>
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</rect>
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</property>
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<property name="sizePolicy">
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@ -43,7 +43,7 @@
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<x>16</x>
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<y>19</y>
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<width>351</width>
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<height>431</height>
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<height>451</height>
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</rect>
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</property>
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<property name="sizePolicy">
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@ -219,34 +219,21 @@
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<string>Dish</string>
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</attribute>
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<layout class="QGridLayout" name="gridLayout_2">
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<item row="7" column="0">
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<item row="8" column="0">
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<widget class="QLabel" name="dishBeamwidthLabel">
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<property name="text">
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<string>Beamwidth (°)</string>
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</property>
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</widget>
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</item>
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<item row="5" column="1">
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<widget class="QDoubleSpinBox" name="dishFD">
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<property name="toolTip">
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<string>Focal length to diameter ratio</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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</property>
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<property name="maximum">
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<double>1.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="2" column="0">
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<widget class="QLabel" name="dishDiameteLabel">
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<item row="0" column="0">
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<widget class="QLabel" name="dishFrequencyLabel">
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<property name="text">
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<string>Diameter</string>
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<string>Frequency</string>
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</property>
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</widget>
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</item>
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<item row="10" column="0" colspan="3">
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<item row="11" column="0" colspan="3">
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<widget class="QLabel" name="dishImage">
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<property name="text">
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<string/>
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@ -259,13 +246,6 @@
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</property>
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</widget>
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</item>
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<item row="5" column="0">
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<widget class="QLabel" name="dishFDLabel">
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<property name="text">
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<string>f/D</string>
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</property>
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</widget>
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</item>
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<item row="0" column="2">
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<widget class="QComboBox" name="dishFrequencySelect">
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<property name="sizePolicy">
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@ -290,7 +270,21 @@
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</item>
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</widget>
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</item>
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<item row="9" column="1">
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<item row="5" column="0">
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<widget class="QLabel" name="dishFocalLengthLabel">
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<property name="text">
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<string>Focal length</string>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QLabel" name="dishEfficiencyLabel">
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<property name="text">
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<string>Efficiency (%)</string>
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</property>
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</widget>
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</item>
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<item row="10" column="1">
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<widget class="QDoubleSpinBox" name="dishGain">
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<property name="toolTip">
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<string>Dish gain</string>
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@ -303,24 +297,126 @@
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</property>
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</widget>
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</item>
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<item row="1" column="1">
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<widget class="QSpinBox" name="dishEfficiency">
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<property name="toolTip">
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<string>Dish efficiency in percent</string>
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</property>
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<property name="maximum">
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<number>100</number>
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</property>
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</widget>
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</item>
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<item row="3" column="0">
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<item row="4" column="0">
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<widget class="QLabel" name="dishDepthLabel">
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<property name="text">
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<string>Depth</string>
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</property>
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</widget>
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</item>
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<item row="2" column="2">
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<item row="12" column="0">
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<spacer name="verticalSpacer">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>20</width>
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<height>40</height>
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</size>
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</property>
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</spacer>
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</item>
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<item row="5" column="1">
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<widget class="QDoubleSpinBox" name="dishFocalLength">
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<property name="toolTip">
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<string>Focal length</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="8" column="1">
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<widget class="QDoubleSpinBox" name="dishBeamwidth">
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<property name="toolTip">
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<string>Halfpower (-3dB) beamwidth in degrees</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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</property>
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<property name="maximum">
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<double>360.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="4" column="1">
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<widget class="QDoubleSpinBox" name="dishDepth">
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<property name="toolTip">
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<string>Depth of the dish</string>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="10" column="0">
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<widget class="QLabel" name="dishGainLabel">
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<property name="text">
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<string>Gain (dB)</string>
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</property>
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</widget>
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</item>
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<item row="0" column="1">
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<widget class="QDoubleSpinBox" name="dishFrequency">
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<property name="toolTip">
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<string>Frequency of operation</string>
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</property>
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<property name="decimals">
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<number>3</number>
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</property>
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<property name="maximum">
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<double>20000.000000000000000</double>
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</property>
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<property name="value">
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<double>2400.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="3" column="1">
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<widget class="QDoubleSpinBox" name="dishDiameter">
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<property name="toolTip">
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<string>Diameter of the dish</string>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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</property>
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<property name="value">
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<double>100.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="6" column="1">
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<widget class="QDoubleSpinBox" name="dishFD">
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<property name="toolTip">
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<string>Focal length to diameter ratio</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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</property>
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<property name="maximum">
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<double>1.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="3" column="0">
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<widget class="QLabel" name="dishDiameteLabel">
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<property name="text">
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<string>Diameter</string>
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</property>
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</widget>
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</item>
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<item row="6" column="0">
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<widget class="QLabel" name="dishFDLabel">
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<property name="text">
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<string>f/D</string>
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</property>
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</widget>
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</item>
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<item row="3" column="2">
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<widget class="QComboBox" name="dishLengthUnits">
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<property name="sizePolicy">
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<sizepolicy hsizetype="Preferred" vsizetype="Fixed">
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@ -354,109 +450,33 @@
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</item>
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</widget>
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</item>
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<item row="9" column="0">
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<widget class="QLabel" name="dishGainLabel">
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<property name="text">
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<string>Gain (dB)</string>
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</property>
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</widget>
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</item>
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<item row="7" column="1">
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<widget class="QDoubleSpinBox" name="dishBeamwidth">
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<item row="1" column="1">
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<widget class="QSpinBox" name="dishEfficiency">
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<property name="toolTip">
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<string>Halfpower (-3dB) beamwidth in degrees</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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<string>Dish efficiency in percent</string>
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</property>
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<property name="maximum">
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<double>360.000000000000000</double>
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<number>100</number>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QLabel" name="dishEfficiencyLabel">
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<item row="2" column="0">
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<widget class="QLabel" name="dishSurfaceErrorLabel">
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<property name="text">
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<string>Efficiency (%)</string>
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</property>
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</widget>
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</item>
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<item row="3" column="1">
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<widget class="QDoubleSpinBox" name="dishDepth">
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<property name="toolTip">
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<string>Depth of the dish</string>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="0" column="1">
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<widget class="QDoubleSpinBox" name="dishFrequency">
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<property name="toolTip">
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<string>Frequency of operation</string>
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</property>
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<property name="decimals">
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<number>3</number>
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</property>
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<property name="maximum">
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<double>20000.000000000000000</double>
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</property>
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<property name="value">
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<double>2400.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="11" column="0">
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<spacer name="verticalSpacer">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>20</width>
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<height>40</height>
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</size>
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</property>
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</spacer>
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</item>
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<item row="0" column="0">
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<widget class="QLabel" name="dishFrequencyLabel">
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<property name="text">
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<string>Frequency</string>
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<string>Surface error</string>
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</property>
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</widget>
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</item>
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<item row="2" column="1">
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<widget class="QDoubleSpinBox" name="dishDiameter">
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<widget class="QDoubleSpinBox" name="dishSurfaceError">
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<property name="toolTip">
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<string>Diameter of the dish</string>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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</property>
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<property name="value">
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<double>100.000000000000000</double>
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</property>
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</widget>
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</item>
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<item row="4" column="0">
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<widget class="QLabel" name="dishFocalLengthLabel">
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<property name="text">
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<string>Focal length</string>
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</property>
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</widget>
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</item>
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<item row="4" column="1">
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<widget class="QDoubleSpinBox" name="dishFocalLength">
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<property name="toolTip">
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<string>Focal length</string>
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<string>RMS surface error (as a length)</string>
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</property>
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<property name="readOnly">
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<bool>true</bool>
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<bool>false</bool>
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</property>
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<property name="maximum">
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<double>1000.000000000000000</double>
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<double>360.000000000000000</double>
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</property>
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</widget>
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</item>
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@ -482,9 +502,12 @@
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<tabstop>dipoleEndEffectFactor</tabstop>
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<tabstop>dishFrequency</tabstop>
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<tabstop>dishFrequencySelect</tabstop>
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<tabstop>dishEfficiency</tabstop>
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<tabstop>dishSurfaceError</tabstop>
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<tabstop>dishDiameter</tabstop>
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<tabstop>dishLengthUnits</tabstop>
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<tabstop>dishDepth</tabstop>
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<tabstop>dishFocalLength</tabstop>
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<tabstop>dishFD</tabstop>
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<tabstop>dishBeamwidth</tabstop>
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<tabstop>dishGain</tabstop>
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@ -41,6 +41,7 @@ void AntennaToolsSettings::resetToDefaults()
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m_dishDepth = 30.0;
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m_dishEfficiency = 60;
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m_dishLengthUnits = CM;
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m_dishSurfaceError = 0.0;
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m_title = "Antenna Tools";
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m_rgbColor = QColor(225, 25, 99).rgb();
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@ -66,6 +67,7 @@ QByteArray AntennaToolsSettings::serialize() const
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s.writeDouble(8, m_dishDepth);
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s.writeS32(9, m_dishEfficiency);
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s.writeS32(10, (int)m_dishLengthUnits);
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s.writeDouble(18, m_dishSurfaceError);
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s.writeString(11, m_title);
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s.writeU32(12, m_rgbColor);
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@ -105,6 +107,7 @@ bool AntennaToolsSettings::deserialize(const QByteArray& data)
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d.readDouble(8, &m_dishDepth, 30.0);
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d.readS32(9, &m_dishEfficiency, 60);
|
||||
d.readS32(10, (int*)&m_dishLengthUnits, (int)CM);
|
||||
d.readDouble(18, &m_dishSurfaceError, 0.0);
|
||||
|
||||
d.readString(11, &m_title, "Antenna Tools");
|
||||
d.readU32(12, &m_rgbColor, QColor(225, 25, 99).rgb());
|
||||
|
||||
@ -41,6 +41,7 @@ struct AntennaToolsSettings
|
||||
double m_dishDepth;
|
||||
int m_dishEfficiency;
|
||||
LengthUnits m_dishLengthUnits;
|
||||
double m_dishSurfaceError;
|
||||
|
||||
QString m_title;
|
||||
quint32 m_rgbColor;
|
||||
|
||||
@ -77,11 +77,17 @@ Select how the frequency is chosen:
|
||||
|
||||
Specifies the efficiency of the dish in %. When entered, the calculator will calculate the gain (16), according to the entered frequency (7) and dimensions (10 & 11).
|
||||
|
||||
<h3>10: Diameter</h3>
|
||||
This value should include losses for things like spillover, illumination loss, feed and support blockage, focus errors.
|
||||
|
||||
When entering the diameter of the dish, the calculator will calculate the focal length (13), f/D ratio (14), beamwidth (15) and gain (16).
|
||||
<h3>10: Surface Error</h3>
|
||||
|
||||
<h3>11: Dish Length Units</h3>
|
||||
Specifies the RMS surface error of the dish in length units (as determined by (12)).
|
||||
|
||||
<h3>11: Diameter</h3>
|
||||
|
||||
When entering the diameter of the dish, the calculator will calculate the focal length (14), f/D ratio (15), beamwidth (16) and gain (17).
|
||||
|
||||
<h3>12: Dish Length Units</h3>
|
||||
|
||||
This field selects the units lengths are entered and displayed in. This can be:
|
||||
|
||||
@ -89,28 +95,30 @@ This field selects the units lengths are entered and displayed in. This can be:
|
||||
* m - metres.
|
||||
* feet - feet.
|
||||
|
||||
<h3>12: Depth</h3>
|
||||
<h3>13: Depth</h3>
|
||||
|
||||
When entering the depth of the dish, the calculator will calculate the focal length (13) and f/D ratio (14).
|
||||
When entering the depth of the dish, the calculator will calculate the focal length (14) and f/D ratio (15).
|
||||
|
||||
<h3>13: Focal length</h3>
|
||||
<h3>14: Focal length</h3>
|
||||
|
||||
Displays the calculated focal length.
|
||||
|
||||
Focal length is calculated as: f=d^2/(16*D)
|
||||
|
||||
<h3>14: f/D Ratio</h3>
|
||||
<h3>15: f/D Ratio</h3>
|
||||
|
||||
Displays the calculated focal length to diameter ratio.
|
||||
|
||||
<h3>15: Beamwidth</h3>
|
||||
<h3>16: Beamwidth</h3>
|
||||
|
||||
Displays the halfpower (-3dB) beamwidth.
|
||||
|
||||
Beamwidth is calculated as: 70*lambda/D.
|
||||
|
||||
<h3>16: Gain</h3>
|
||||
<h3>17: Gain</h3>
|
||||
|
||||
Displays the calculated gain in dB.
|
||||
|
||||
The gain is calculated as: 10\*log10(eff/100.0\*(pi*D/lambda)^2)
|
||||
The nominal gain is calculated as: g0=10\*log10(eff/100.0\*(pi*D/lambda)^2)
|
||||
|
||||
The gain is then adjusted for surface error with Ruze's equation: g=g0-685.81*(e/lambda)^2
|
||||
|
||||
Loading…
Reference in New Issue
Block a user