New miniature dual-loop coupler enables microwave power monitoring in confined spaces


The new AM90CD-LP miniature narrowband dual-loop coupler from microwave component manufacturer Link Microtek enables designers to incorporate forward and reverse power monitoring in military or commercial microwave systems that are subject to tight space constraints.

With flange dimensions of 41.5 x 41.5mm and a waveguide length of just 33.6mm, the device is an ideal alternative to much larger conventional broadband couplers. It features a rugged construction and is particularly suitable for airborne applications as it is fabricated from lightweight aluminium and can be pressurised up to 30psig if required.

The new coupler can be specified with any standard size of 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, utilising the two SMA ports on each side, one of which is fitted with a termination.

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

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