A 2‐ to 12‐GHz 65‐nm transmit/receive CMOS DP8T switching matrix for ultra‐wideband antenna arrays

Summary An ultra‐wideband 2‐ to 12‐GHz transmit/receive (T/R) double‐pole–eight‐throw (DP8T) switching matrix is developed with a 65‐nm complementary metal oxide semiconductor (CMOS) process for a radar‐based breast cancer detection system. The measured average insertion losses are 5.2, 7, and 10.6 dB at 2, 6, and 12 GHz, respectively, with input and output matching bandwidths of 2 to 12 GHz and a third‐order input intercept point (IIP3) of 31 dBm at 8 GHz. The power consumption is less than 1 mW for a 1.2‐V power supply. To the best of the authors' knowledge, this is the first reported DP8T CMOS switching matrix to replace the conventional mechanical switch to control a portable radar antenna.