A Compact DC-30 GHz 0.13-um CMOS SP4T Switch

This paper presents a DC-30 GHz single-pole-four-throw (SP4T) CMOS switch using 0.13 mum CMOS process. The CMOS transistor layout is done to minimize the substrate network resistance. The on-chip matching inductors and routing are designed for a very small die area (250times180 mum²), and modeled using full-wave EM simulations. The SP4T CMOS switch result in an insertion loss of 1.8 dB and 2.7 dB at 5 GHz and 24 GHz, respectively. The isolation is >25 dB up to 30 GHz and achieved using a series-shunt switch configuration. The measured input P1 dB and IIP3 of the SP4T switch are 9 dBm and 21 dBm, respectively. To our knowledge, this is the first ultra wideband CMOS SP4T switch and with a very small chip area.