A Broadband Millimeter-Wave Single-Pole Double-Throw Switch Based on Reduced-Size Transmission Line

In this paper, a broadband millimeter-wave (mm-wave) single-pole double-throw (SPDT) switch utilizing reduced-size transmission line is proposed for the fifth-generation (5G) applications. The proposed switch is implemented in 0.13-μm SiGe BiCMOS process, and occupies 0.37 mm
²
. By utilizing the parasitic capacitance of the transistors, a better bandwidth performance can be obtained with shorter transmission lines. The switch achieves a measured insertion loss of 2.34-2.84 dB with pads over the frequency range of 18-43.5 GHz. Meanwhile, better than 19 dB isolation performance is obtained in the same frequency range.