A Portable K-Band 3-D MIMO Radar with Nonuniformly Spaced Array for Short-Range Localization

Zhengyu Peng, Changzhi Li

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


This paper presents a K-band multiple-input-multiple-output (MIMO) radar for short-range localization. This radar features 3-D imaging capability, which can obtain the range, azimuth angle, and zenith angle of a target. The proposed radar system implements the concept of MIMO to synthesize a planar array that realizes 2-D digital beamforming with a small number of transmitter and receiver (T/R) channels. A nonuniformly spaced array configuration is also designed to further reduce the number of T/R channels without sacrificing the beamwidth and sidelobe level. The design principle is detailed in this paper. A prototype with eight transmitter channels and eight receiver channels has been built. A calibration procedure was developed to remove path delays of different MIMO channels. Experiments of the proposed K-band MIMO radar prototype reveal its capability in the 3-D localization of multiple targets. This prototype features 7.2° 2-D angular resolution, 90° field of view,-10-dB sidelobe level, and wireless data transfer.

Original languageEnglish
Article number8474363
Pages (from-to)5075-5086
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11
StatePublished - Nov 2018


  • Frequency-modulated continuous-wave (FMCW) radar
  • K-band
  • multiple-input-multiple-output (MIMO) radar
  • short-range localization
  • time-division multiplexing (TDM)


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