QuarterWaveMatch (Quarter Wave Match)

Symbol

Summary

A quarter wave transformer network provides a broadband bandpass frequency response between the input (pin 1) and output (pin 2) ports. The source or load terminations must be unequal resistances. The matching network consists of multiple quarter wavelength transmission line elements with carefully computed characteristic impedances to provide the specified frequency response.

Parameters

Name	Description	Unit	Default
Fp1	Frequency at lower passband edge	GHz	1
Fp2	Frequency at upper passband edge	GHz	2
Rg	Input impedance	Ohms	50
RL	Load impedance	Ohms	100
ResponseType	Type of frequency response	None	Uniform
N	Number of Quarter-Wave Sections (set N=0 to compute N)	None	0
Rmax	Maximum voltage reflection coefficient	dB	20

Palette

Impedance Matching

Available Automated-Assistants

Matching Assistant, Simulation Assistant, Yield Assistant, Display Assistant, Transformation Assistant

Matching Assistant Usage

For general information, refer to Matching Assistant.

Simulation Assistant Usage

For general information, refer to Simulation Assistant.

Yield Assistant Usage

For general information, refer to Yield Assistant.

Display Assistant Usage

For general information, refer to Display Assistant.

Example

A quarter wave transformer was designed to match a 100 Ohm load impedance to a 50 ohm source impedance from 1GHz to 2 GHz. The maximum reflection coefficient was -20 dB, with a uniform distribution of the section reflection coefficients. The design resulted in N=3 sections.