antenna::XmlAntenna Class Reference

Represents an antenna whose gain pattern is defined by an XML file. More...

#include "antenna_factory.h"

Inheritance diagram for antenna::XmlAntenna:

Collaboration diagram for antenna::XmlAntenna:

Public Member Functions
	XmlAntenna (const std::string_view name, const std::string_view filename)
	Constructs an XmlAntenna with the specified name and XML configuration file.
	~XmlAntenna () override=default
	XmlAntenna (const XmlAntenna &)=delete
XmlAntenna &	operator= (const XmlAntenna &)=delete
	XmlAntenna (XmlAntenna &&)=delete
XmlAntenna &	operator= (XmlAntenna &&)=delete
RealType	getGain (const math::SVec3 &angle, const math::SVec3 &refangle, RealType wavelength) const override
	Computes the gain of the antenna based on the input angle and reference angle.
const std::string &	getFilename () const noexcept
	Gets the filename of the antenna description.
RealType	getMaxGain () const noexcept
	Gets the maximum gain of the antenna.
const interp::InterpSet *	getAzimuthSamples () const noexcept
	Gets the interpolation set for azimuth gain samples.
const interp::InterpSet *	getElevationSamples () const noexcept
	Gets the interpolation set for elevation gain samples.
RealType	getEfficiencyFactor () const noexcept
	Retrieves the efficiency factor of the antenna.
std::string	getName () const noexcept
	Retrieves the name of the antenna.
virtual RealType	getNoiseTemperature (const math::SVec3 &) const noexcept
	Computes the noise temperature of the antenna based on the angle.
void	setEfficiencyFactor (RealType loss) noexcept
	Sets the efficiency factor of the antenna.

Static Protected Member Functions
static RealType	getAngle (const math::SVec3 &angle, const math::SVec3 &refangle) noexcept
	Computes the angle between the input and reference angles.

Detailed Description

Represents an antenna whose gain pattern is defined by an XML file.

This class models an antenna where the gain pattern is read from an XML file.

Definition at line 362 of file antenna_factory.h.

Constructor & Destructor Documentation

XmlAntenna() [1/3]

antenna::XmlAntenna::XmlAntenna	(	const std::string_view	name,
		const std::string_view	filename
	)

Constructs an XmlAntenna with the specified name and XML configuration file.

The constructor loads the azimuth and elevation gain patterns from the provided XML file.

Parameters

name	The name of the antenna.
filename	The path to the XML file containing the antenna's gain pattern data.

Definition at line 373 of file antenna_factory.h.

                                                                             :
            Antenna(name.data()), _azi_samples(std::make_unique<interp::InterpSet>()),
            _elev_samples(std::make_unique<interp::InterpSet>())
        {
            loadAntennaDescription(filename);
        }

~XmlAntenna()

antenna::XmlAntenna::~XmlAntenna ( )

overridedefault

XmlAntenna() [2/3]

antenna::XmlAntenna::XmlAntenna ( const XmlAntenna &  )

delete

XmlAntenna() [3/3]

antenna::XmlAntenna::XmlAntenna ( XmlAntenna &&  )

delete

Member Function Documentation

getAngle()

RealType antenna::Antenna::getAngle ( const math::SVec3 &  angle, const math::SVec3 &  refangle  )

staticprotectednoexceptinherited

Computes the angle between the input and reference angles.

Parameters

angle	The input angle.
refangle	The reference angle.

Returns

The computed angle.

Definition at line 93 of file antenna_factory.cpp.

    {
        SVec3 normangle(angle);
        normangle.length = 1;
        return std::acos(dotProduct(Vec3(normangle), Vec3(refangle)));
    }

References math::SVec3::length.

getAzimuthSamples()

const interp::InterpSet * antenna::XmlAntenna::getAzimuthSamples ( ) const

noexcept

Gets the interpolation set for azimuth gain samples.

Definition at line 409 of file antenna_factory.h.

{ return _azi_samples.get(); }

getEfficiencyFactor()

RealType antenna::Antenna::getEfficiencyFactor ( ) const

noexceptinherited

Retrieves the efficiency factor of the antenna.

Returns

The efficiency factor of the antenna.

Definition at line 73 of file antenna_factory.h.

{ return _loss_factor; }

Referenced by antenna::Isotropic::getGain(), getGain(), antenna::H5Antenna::getGain(), and antenna::to_json().

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getElevationSamples()

const interp::InterpSet * antenna::XmlAntenna::getElevationSamples ( ) const

noexcept

Gets the interpolation set for elevation gain samples.

Definition at line 412 of file antenna_factory.h.

{ return _elev_samples.get(); }

getFilename()

const std::string & antenna::XmlAntenna::getFilename ( ) const

noexcept

Gets the filename of the antenna description.

Definition at line 403 of file antenna_factory.h.

{ return _filename; }

getGain()

RealType antenna::XmlAntenna::getGain ( const math::SVec3 &  angle, const math::SVec3 &  refangle, RealType  wavelength  ) const

overridevirtual

Computes the gain of the antenna based on the input angle and reference angle.

Parameters

angle	The angle at which the gain is to be computed.
refangle	The reference angle.
wavelength	The wavelength of the signal (not used in this antenna type).

Returns

The gain of the antenna at the specified angle.

Exceptions

std::runtime_error

If gain values cannot be retrieved from the interpolation sets.

Implements antenna::Antenna.

Definition at line 128 of file antenna_factory.cpp.

    {
        const SVec3 delta_angle = angle - refangle;
 
        const std::optional<RealType> azi_value = _azi_samples->getValueAt(std::abs(delta_angle.azimuth));
 
        if (const std::optional<RealType> elev_value = _elev_samples->getValueAt(std::abs(delta_angle.elevation));
            azi_value && elev_value)
        {
            return *azi_value * *elev_value * _max_gain * getEfficiencyFactor();
        }
 
        LOG(Level::FATAL, "Could not get antenna gain value");
        throw std::runtime_error("Could not get antenna gain value");
    }

References math::SVec3::azimuth, math::SVec3::elevation, antenna::Antenna::getEfficiencyFactor(), and LOG.

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getMaxGain()

RealType antenna::XmlAntenna::getMaxGain ( ) const

noexcept

Gets the maximum gain of the antenna.

Definition at line 406 of file antenna_factory.h.

{ return _max_gain; }

getName()

std::string antenna::Antenna::getName ( ) const

noexceptinherited

Retrieves the name of the antenna.

Returns

The name of the antenna.

Definition at line 80 of file antenna_factory.h.

{ return _name; }

Referenced by antenna::to_json(), radar::to_json(), and radar::to_json().

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getNoiseTemperature()

virtual RealType antenna::Antenna::getNoiseTemperature ( const math::SVec3 &  ) const

virtualnoexceptinherited

Computes the noise temperature of the antenna based on the angle.

Parameters

angle

The angle at which the noise temperature is to be computed.

Returns

The noise temperature of the antenna.

Definition at line 89 of file antenna_factory.h.

{ return 0; }

operator=() [1/2]

XmlAntenna & antenna::XmlAntenna::operator= ( const XmlAntenna &  )

delete

operator=() [2/2]

XmlAntenna & antenna::XmlAntenna::operator= ( XmlAntenna &&  )

delete

setEfficiencyFactor()

void antenna::Antenna::setEfficiencyFactor ( RealType  loss )

noexceptinherited

Sets the efficiency factor of the antenna.

Parameters

loss	The new efficiency factor.

Definition at line 84 of file antenna_factory.cpp.

    {
        if (loss > 1)
        {
            LOG(Level::INFO, "Using greater than unity antenna efficiency.");
        }
        _loss_factor = loss;
    }

References LOG.

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The documentation for this class was generated from the following files:

• packages/libfers/src/antenna/antenna_factory.h
• packages/libfers/src/antenna/antenna_factory.cpp