A 6-32GHz T/R switch in 0.18-µm CMOS technology

Abstract

Abstract:This paper presents a broadband single-pole doublethrow (SPDT) transmit/receive (T/R) switch implemented in a standard 0.18-µm CMOS technology. The switch uses a grounded inductor, transistors in deep n-type wells, resistive body-floating components, a negative control voltage, and lowpass networks to improve its insertion losses, power-handling capabilities, and isolation. Moreover, the switch featuring a bandpass response results from the grounded inductor and the lowpass networks. To select T/R modes, the control voltage is under ±1.8-V operation. The insertion loss, input return loss, return loss, and isolation of the switch are 2.7 ± 0.4 dB, > 14.3 dB, > 10.2 dB, and > 32.8 dB from 6 GHz to 32 GHz, respectively. The input P 1 dB is 22.6 ± 1.6 dBm at the frequencies of interest. Keywords: T/R switch, CMOS, single-pole double-throw switch Classification: Microwave and millimeter wave devices, circuits, and systems References[1] T. Dinc, S. Zihir, and Y. Gurbuz, "CMOS SPDT T/R switch for X-band, on-chip radar applications," Electronics Lett., vol. 46, no. 20, pp. 1382-1384, Oct. 2010

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