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vswr

Voltage standing wave ratio (VSWR) of antenna or array element

Description

example

vswr(object,frequency,z0) calculates and plots the VSWR of an antenna or an array element, over specified frequency range, and a reference impedance of z0 ohms.

example

vswrant = vswr(object,frequency,z0) calculates and returns the VSWR of an antenna or array element, over specified frequency range, and a reference impedance of z0 ohms.

Examples

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

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

Figure contains an axes object. The axes object with title VSWR, xlabel Frequency (MHz), ylabel Magnitude contains an object of type line.

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

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

    3.6010    6.6936    3.3338

Input Arguments

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Antenna or array to calculate the VSWR, specified as an antenna or array from the catalog, custom antenna or array created using custom antenna or array objects in Custom 2-D and 3-D Antenna catalog, pcbStack antenna or array, or installedAntenna.

Frequency used to calculate VSWR, specified as a scalar in Hz or frequency range specified as vector in Hz.

Example: 75e6

Example: 50e6:1e6:100e6

Data Types: double

Reference impedance, specified as a scalar in ohms.

Output Arguments

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VSWR, returned as a scalar in dB for a single analysis frequency and a vector in dB for a frequency range.

Version History

Introduced in R2015a

See Also