Link Microtek's engineering division has introduced rectangular-waveguide terminations that use forced-air cooling. According to the company, this enables them to offer a higher power-handling capability than convection-cooled alternatives. They can be used to test and maintain radar systems and other high-power microwave equipment. The ‘dummy' loads safely absorb microwave signals with a mean power in excess of 1kW. The terminations are available in a variety of waveguide sizes to suit operating frequencies ranging from 1.12 to 40GHz and are equipped with an AC- or DC-input fan. An external cowling directs airflow over the cooling fins. Internal elements are made from absorbent, cast ceramic material, rated at up to 3000°C. Temperature sensors and power samplers, to monitor microwave power levels, are optionally available.
