期刊
IEEE JOURNAL OF SOLID-STATE CIRCUITS
卷 57, 期 4, 页码 1211-1223出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2021.3137336
关键词
Relays; Backscatter; Transceivers; 5G mobile communication; Receivers; Transmitters; Power demand; Backscatter; CMOS; fifth-generation (5G) mobile network; phased array; rectifier; relay transceiver; self-heterodyne; vector summing; wireless power transfer (WPT)
资金
- Ministry of Internal Affairs and Communications (MIC)/Strategic Information and Communications Research and Development Promotion Programme (SCOPE) [192203002, 192103003]
- Ministry of Internal Affairs and Communications in Japan [JPJ000254]
- Support for Tokyo Tech Advanced Researchers (STAR)
- VLSI Design and Education Center (VDEC)
- Cadence Design Systems, Inc.
- Mentor Graphics, Inc.
- Keysight Technologies Japan Ltd.
This article introduces a wirelessly powered phased-array transceiver for fifth-generation (5G) relay systems. By utilizing 24-GHz wireless power transfer (WPT), the relay transceiver operates without batteries. The proposed vector-summing backscatter is used for the transmitter, while a passive phase-shifting self-heterodyne receiver with a rectifier is employed for the receiver and WPT. The chip area of the transceiver is 1.8 mm² and it is mounted on a 32-element phased-array antenna board. The power consumption for each path is 0.03 mW in both transmitter and receiver modes.
This article introduces a wirelessly powered phased-array transceiver for fifth-generation (5G) relay systems. To realize the battery-less relay operation, 24-GHz wireless power transfer (WPT) is employed. This relay transceiver consists of the proposed vector-summing backscatter for Transmitter (Tx) and a passive phase-shifting self-heterodyne Receiver (Rx) with a rectifier for Rx and WPT. The receiver generates dc power from the 24-GHz WPT signal, which is also used as a local oscillator (LO) signal to down-convert the 28-GHz 5G modulated data to a 4-GHz IF. The vector-summing backscatter up-converts the 4-GHz IF signal to 28-GHz using a 24-GHz LO signal while working as a 360 degrees phase shifter with a 7-bit resolution. Both transmitter and receiver operate only using the generated power from the 24-GHz WPT. The chip area of the eight-path transceiver is 1.8 mm(2) and the transceiver is mounted on a 32-element phased-array antenna board. This module generates 3.1-mW dc power from 6.7-mW/cm(2) received power density at 24 GHz. The transmitter achieves a -2.2-dBm measured saturated equivalent isotropically radiated power (EIRP) and supports a -30 degrees to +30 degrees beam range. The measured error vector magnitude (EVM) values are -27.5 dB for Tx mode and -31.3 dB for Rx mode with a 400-MHz 64-QAM orthogonal frequency division multiple access (OFDMA)-mode signal (5G new radio (NR), MCS 19). The power consumption for each path is 0.03 mW in both Tx and Rx modes.
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