Analog Devices, Inc.
Broadband radio frequency coupler

Abstract:

An apparatus for processing radio frequency (RF) signals includes a housing with a cavity. In the cavity, a stripline is configured to carry the RF signal. The stripline is on a substrate and suspended in the cavity. One or more coupled lines, which can be forward and reverse directional microstrip couplers, are electromagnetically coupled to the stripline and receive an attenuated version of the RF signal. The couplers can have a stair step design or asymmetric design to enhance directivity.