vswr

Voltage standing wave ratio of antenna

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Syntax

vswr(antenna,frequency,z0)
vswrant = vswr(antenna,frequency,z0)

Description

example

vswr(antenna,frequency,z0) calculates and plots the voltage standing wave ratio of an antenna, over specified frequency range, and given reference impedance, z0.

example

vswrant = vswr(antenna,frequency,z0) returns the vswr of the antenna.

Examples

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Open Live Script

Plot vswr (voltage standing wave ratio) of a circular loop antenna.

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

Open Live Script

Calculate vswr (voltage standing wave ratio) of a helix antenna.

h = helix;
hvswr = vswr(h,2e9:1e9:4e9,50)
hvswr = 1×3

    3.5730    6.7043    3.3598

Input Arguments

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Antenna object, specified as a scalar handle.

Frequency range used to calculate VSWR, specified as a vector in Hz. The minimum value of frequency must be 1 kHz.

Example: 50e6:1e6:100e6

Data Types: double

Reference impedance, specified as a scalar in ohms.

Output Arguments

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Voltage standing wave ratio, returned as a vector in dB.

See Also

Introduced in R2015a

Antenna Toolbox Documentation
Support