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Volume 45 Issue 6
Jun.  2019
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Journal of Beijing University of Aeronautics and Astronautics  > 2019  >  45(6): 1266-1272.
DANG Yanjie, LIANG Yu, ZHANG Weiet al. Design of a new path-sharing true-time-delay beamformer architecture[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(6): 1266-1272. doi: 10.13700/j.bh.1001-5965.2018.0626(in Chinese)
Citation: DANG Yanjie, LIANG Yu, ZHANG Weiet al. Design of a new path-sharing true-time-delay beamformer architecture[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(6): 1266-1272. doi: 10.13700/j.bh.1001-5965.2018.0626(in Chinese)
shu

Design of a new path-sharing true-time-delay beamformer architecture

doi: 10.13700/j.bh.1001-5965.2018.0626

  • School of Microelectronics, Tianjin University, Tianjin 300072, China

Funds:

National Key R & D Program of China 2016YFE0100400

More Information
  • Corresponding author: ZHANG Wei, E-mail: tjuzhangwei@tju.edu.cn
  • Received Date: 31 Oct 2018
  • Accepted Date: 29 Dec 2018
  • Publish Date: 20 Jun 2019
    Abstract

  • In order to meet the requirement of multi-input and multi-output of broadband wireless communication system, a new path-sharing true-time-delay beamformer architecture is proposed in this paper. The output capability is improved by synthesizing multiple signals, compensating the time difference in reaching the antenna with a certain delay difference provided by the true-time-delay unit. Compared with the traditional beamformer architecture, this architecture can save the area of chip by true-time-delay unit sharing. It is not only extensional, supporting 2 M antennas and synthesizing 2 K signal beams, but also symmetrical. Based on HHNEC 0.18 μm CMOS process, four-in-four-out beamformer is designed to verify the proposed architecture. The simulation results show that this beamformer works over 0.5-1.5 GHz and has four antennas, with delay resolution of 80 ps and maximum delay of 720 ps. It can provide four scanning angles of ±43° and ±13° for four antennas with 10.5 cm spacing. The input-output return loss is not more than -10 dB, the gain is about 26 dB, and gain flatness is not more than 3 dB. The layout area (including I/O pad and ESD) is 3.69 mm×3.62 mm.

     

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