Abstract

A dc-to-50-GHz SPDT switch in standard bulk 0.18-m CMOS process is demonstrated in this paper. In order to extend the operation frequency, the traveling-wave circuit topology is utilized. The switch achieves a measured insertion loss of less than 6 dB, a measured isolation of better than 38 dB from dc to 50 GHz. The measured input P1dB of 17.4 dBm at 5.8 GHz and 19.6 dBm at 40 GHz is attained. The chip size is only 0.5 x 0.5 mm2. To our knowledge, this work is the first CMOS switch operating from dc to millimeter-wave frequency with a miniature chip size.