Browsing by Author "Lu, Hsin-Chia"

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A 0.55THz Y-Vector Network Configured Beam Steering Phased Array in CMOS Technology
(2018-01-01)
Zhao, Yan
;
Al Hadi, Richard
;
Lu, Hsin-Chia
;
Tseng, Tzu-Shiuan
;
Zhang, Yan
A Y-vector oscillator network is devised to configure (sub)-mm-wave/terahertz (THz) beamforming systems with minimized footprint and energy consumption. It requires no traditional adjustable phase shifter at multi-channel front end which usually suffer from high insertion loss at these frequencies. A compact (1.4mm(2)) CMOS 1x4 Beam Steering Phased Array (BSPA) based on this network is validated at 0.55THz with +/- 30 degrees steering angle range. This is the first monolithic BSPA reported beyond 0.5THz.
A 77-GHz 2T6R Transceiver With Injection-Lock Frequency Sextupler Using 65-nm CMOS for Automotive Radar System Application
(2016-10)
Hsiao, Yuan-Hung
;
Chang, Yu-Chuan
;
Tsai, Ching-Han
;
Huang, Ting-Yi
;
Aloui, Sofiane
In this paper, a CMOS multichannel transceiver (TRX) is proposed for angular identification in automotive car radar applications. Two transmitters (TXs) and six receivers (RXs) are placed on the same die using 65-nm CMOS technology with chip size 3.5x3 mm(2). To generate a millimeter-wave (MMW) frequency-modulated continuous-wave signal, an injection-lock frequency sextupler cascaded a 1-to-8 Wilkinson power dividing network with wideband isolation is designed as the LO-chain to convert external source from 12.5-13.7 to 75-82.2 GHz for both the TXs and RXs. Each TX achieves above 11-dBm output power and the RXs achieve 30-dB conversion gain from 75 to 82 GHz, and the total power dissipation of whole chip is 1.43 W. Compared with other published multichannel TRXs in silicon germanium (SiGe) process, this paper demonstrates compatible performances and the potential of multichannel TRX using CMOS for MMW automotive car radar application.