FD-SOI mm-Wave Differential Single-Pole Switches with Ultra-High Isolation

FD-SOI is a promising technology for integrating mm-wave front- end circuitry. In this paper, fully-differential SPST and SP4T switches are designed with wideband operation (DC up to 50 GHz) using GlobalFoundries’ 22FDX® platform. Based on a differential modeblocking topology, the switches can achieve isolations better than 50 dB. At 28 GHz, the balanced topology achieves an insertion loss of 1.92 dB, a 1-dB compression of 23.5 dBm and an IIP3 of 47.6 dBm.