Reflection phase shifters

Updated January 2, 2010

Click here to go to our main page on phase shifters

Click here to go to our page on hybrid (3 dB) couplers

Click here to go to our page on quadrature couplers

Click here to go to our page on rat-race couplers

Click here to go to a companion page on reflection attenuators

This page has been broken into several pages with additional content for January 2010.

Reflection phase shifters can be either digital (discrete states) or analog (infinitely variable). There are (at least) three ways to implement the reflection network, using a circulator (only one variable termination is needed) or using a four-port hybrid coupler (two variable terminations are needed). Hybrid couplers come in 90 degree and 180 degree varieties.

Reflection phase shifters using quadrature hybrids

Varactor phase shifters

PIN diode 180 degree phase shifter

Reflection bits using circulators (coming soon!)

Reflection bits using 180 hybrids