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Design rat-race coupler around specified frequency

Since R2021b


coupler = design(couplerobj,frequency) designs a rat-race coupler around the specified frequency.


coupler = design(___,Name=Value) designs a rat-race coupler line with additional options specified using name-value arguments.


PCB components designed using the design function operate around the specified frequency with a 10-15% tolerance.


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Design a rat-race coupler at 1.8 GHz and with a charecteristic impedance of 75 ohms.

coupler = design(couplerRatrace,1.8e9,Z0=75);

Plot the S-parameters of the coupler at 1.8 GHz.

spar = sparameters(coupler,1.8e9);

Input Arguments

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Rat-race coupler, specified as a couplerRatrace object.

Example: coupler = couplerRatrace; design(coupler,2e9) designs a rat-race coupler around a frequency of 2 GHz.

Design frequency of the rat-race coupler, specified as a real positive scalar in hertz.

Example: 2.5e9

Data Types: double

Name-Value Arguments

Example: Z0=70

Characteristic impedance of the coupler in ohms, specified as a positive scalar.

Data Types: double

Output Arguments

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Rat-race coupler operating around the specified reference frequency, returned as a couplerRatrace object.

Version History

Introduced in R2021b

See Also