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returnLoss

Return loss of antenna; scan return loss of array

Syntax

returnLoss(antenna,frequency,z0)
rl = returnLoss(antenna ,frequency, z0)
returnLoss(array,frequency,elementnumber)
rl = returnLoss(array,frequency,elementnumber)

Description

example

returnLoss(antenna,frequency,z0) calculates and plots the return loss of an antenna, over a specified frequency and a given reference impedance, z0.

rl = returnLoss(antenna ,frequency, z0) returns the return loss of an antenna.

returnLoss(array,frequency,elementnumber) calculates and plots the scan return loss of a specified antenna element in an array.

rl = returnLoss(array,frequency,elementnumber) returns the scan return loss of a specified antenna element in an array.

Examples

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This example shows how to calculate and plot the return loss of a circular loop antenna over a frequency range of 50MHz-100MHz.

h = loopCircular;
returnLoss (h, 50e6:1e6:100e6);

Input Arguments

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Antenna object, specified as a scalar handle.

Array object, specified as a scalar handle.

Frequency range used to calculate return loss, specified as a vector in Hz.

Example: 50e6:1e6:100e6

Data Types: double

Reference impedance, specified as a scalar in ohms.

Example: 40

Data Types: double

Antenna element number in array, specified as a scalar.

Example: 1

Data Types: double

Output Arguments

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Return loss of antenna object or scan return loss of array object, returned as a vector in dB. The return loss is calculated using the formula

RL=20log10|(ZZ0)(Z+Z0)|

where,

  • Z = input impedance of antenna or scan impedance of array

  • Z0 = reference impedance

Introduced in R2015a

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