Dual-Loop Coupler for Microwave Power Monitoring in Space Constraint Applications

Link Microtek has introduced a new miniature narrowband dual-loop coupler that enables designers to incorporate forward and reverse power monitoring in military or commercial microwave systems that are subject to tight space constraints. 

The AM90CD-LP dual loop coupler has flange dimensions of 41.5 x 41.5 mm and a waveguide length of just 33.6mm. The device is an ideal alternative to much larger conventional broadband couplers. It features rugged construction and is particularly suitable for airborne applications as it is fabricated from lightweight aluminum and can be pressurized up to 30psig if required.

The new coupler can be specified with any standard size of the waveguide, allowing it to be used for a wide range of system operating frequencies. As a dual-loop device, it monitors both forward and reverse power at the same time, utilizing the two SMA ports on each side, one of which is fitted with a termination.

Capable of handling 15 kW peak power and 400 W average power, the AM90CD-LP delivers a nominal coupling factor of 40 dB. The device is finished with chromium-free passivation, for enhanced corrosion resistance, and satin black epoxy paint.