The FMW90CP001-XX from Fairview Microwave are Waveguide Broadwall Couplers that operate from 8.2 to 12.5 GHz. They are available with various coupling levels - 10 dB, 20 dB, 30 dB, 60 dB and have an insertion loss of less than 0.6 dB. These couplers are designed for applications where power measurements are required within a system for measuring/sampling power or frequency monitoring with minimal signal loss to the main transmission line. They are made of painted Copper alloy and incorporate a broadwall configuration that results in a mid-band coupling level range. These waveguide couplers are available in a standard module that measures 17.91 x 1.63 x 1.63 inches with N-type (female) connectors and WR-90 waveguide flange.