here to go to our main page on phase shifters
here to go to our page on hybrid (3 dB) couplers
here to go to our page on quadrature couplers
here to go to our page on rat-race couplers
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.
phase shifters using quadrature hybrids
diode 180 degree phase shifter
Reflection bits using circulators
bits using 180 hybrids