具高隔離度之毫米波非對稱式收發開關

The Q band (33–50.5 GHz) within the millimeter spectrum is used by various applications, including weather radar, 5G mobile network, and the emerging satellite internet, e.g., Starlink. In 5G frequency range 2 (FR2), the n260 and n259 bands span 37–40 GHz and 39.5–43.5 GHz, respectively. In addition, the n262 band, which ranges from 47.2 to 48.2 GHz, is added in 3GPP Release 17. For 5G FR2 bands, wireless transceivers operate in TDD (time-division duplexing) mode. Therefore, a T/R switch is required to connect the antenna, receiver, and transmitter.The proposed project "Millimeter-Wave Asymmetric T/R Switch with High Isolation" is aimed at developing a 37–48.2 GHz T/R switch for 5G n260/n259/n262 bands. The T/R switch chip will be implemented using TSMC 90-nm CMOS process in conjunction with WIN IPD (integrated passive device) process provided by the TSRI. To achieve lower insertion loss, the inductors and transmission lines in the circuit will be realized using the WIN IPD process.Asymmetric topology will be adopted for the T/R switch design. The goal is to achieve an IP1dB greater than 30 dBm and an isolation greater than 35 dB in the TX mode.We plan to complete this project in one year. The tasks include parameter analysis, chip design, and chip measurement of the T/R switch. A 37–48.2 GHz asymmetric T/R switch with high isolation will be presented as the outcome of this project.