W-band broadband integrated circuit mixers

Broadband integrated circuit mixers using a crossbar stripline configuration and a finline configuration have been developed. For the crossbar stripline balanced mixer, less than 7.5 dB conversion loss for 15 GHz instantaneous IF bandwidth has been achieved with the LO at 75 GHz and the RF swept from 76 to 91 GHz. For the finline balanced mixer, a conversion loss of 9 to 12 dB over a 19 GHz instantaneous IF bandwidth has been achieved as the RF is swept from 91 to 110 GHz.