Design of high‐isolation and low‐loss single pole double throw switch based on the triple‐coupled transformer for ultra‐wideband phased array systems

Abstract

This paper proposes a single pole double throw (SPDT) switch based on the triple-coupled transformer. The triple-coupled transformer utilizes a novel structure with three stacked coupled inductors which are placed in nonconcentric positions to ensure the isolation of SPDT switch. The SPDT switch obtains additional optimization space to improve insertion loss performance under the premise of reassuring isolation. The equivalent circuit model is built to interpret the mechanism of the SPDT switch and transformer. The proposed switch is implemented with the 65-nm CMOS process, the simulated results show the isolation between input-to-output ports are better than 25 dB at 24-38 GHz. The proposed SPDT switch achieves a minimum insertion loss of 1.56 dB with compact chip size 625 Â 370 μm 2 (with PADs).

A 22.7‐ to 44.2‐GHz Darlington dual‐injection injection‐locked frequency tripler with >35dBc harmonic rejection for multiband 5G communication systems

“…A fifth generation (5G) millimeter-wave (mm-wave) communication is booming under this information trend. 1,2 At present, different countries and regions have allocated different frequency bands for the research and development of 5G mm-wave communication, covering the frequency range of 24-43 GHz. The use of ultra-wideband technology to achieve 5G full-band coverage is of great significance to the development of mm-wave communication systems in future multistandard applications and international roaming.…”

“…In recent years, traditional cellular frequency bands are seriously affected by congestion and can hardly cope with the increasing demand for massive information transmission (such as data for IoT (internet of things) and artificial intelligence). A fifth generation (5G) millimeter‐wave (mm‐wave) communication is booming under this information trend 1,2 . At present, different countries and regions have allocated different frequency bands for the research and development of 5G mm‐wave communication, covering the frequency range of 24–43 GHz.…”