Title :
A 24-GHz SiGe phased-array receiver-LO phase-shifting approach
Author :
Hashemi, Hossein ; Guan, Xiang ; Komijani, Abbas ; Hajimiri, Ali
Author_Institution :
Dept. of Electr. Eng. Electrophys., Univ. of Southern California, Los Angeles, CA
Abstract :
A local-oscillator phase-shifting approach is introduced to implement a fully integrated 24-GHz phased-array receiver using SiGe technology. Sixteen phases of the local oscillator are generated in one oscillator core, resulting in a raw beam-forming accuracy of 4 bits. These phases are distributed to all eight receiving paths of the array by a symmetric network. The appropriate phase for each path is selected using high-frequency analog multiplexers. The raw beam-steering resolution of the array is better than 10deg for a forward-looking angle, while the array spatial selectivity, without any amplitude correction, is better than 20 dB. The overall gain of the array is 61 dB, while the array improves the input signal-to-noise ratio by 9 dB
Keywords :
Ge-Si alloys; antenna phased arrays; beam steering; multiplexing equipment; radio receivers; semiconductor materials; voltage-controlled oscillators; 24 GHz; 61 dB; 9 dB; LO phase shifting approach; SiGe; SiGe phased array receiver; array spatial selectivity; high frequency analog multiplexers; local oscillator; raw beam steering resolution; signal-noise ratio; Antenna arrays; FCC; Frequency; Germanium silicon alloys; Local oscillators; Phased arrays; Receiving antennas; Silicon germanium; Wireless communication; Wireless sensor networks; BiCMOS integrated circuits; phase-locked loops; phased arrays; radio receivers; silicon; voltage-controlled oscillators (VCOs);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2004.841218
