DOA Estimation for Unequal Power Sources using Extremely Low Profile Aperture Coupled Microstrip Antenna

Authors

  • Yong Han School of Electronics and Information Engineering Harbin Institute of Technology, Weihai, 264209, China
  • Qingyuan Fang School of Information Science and Technology Shijiazhuang Tiedao University, Shijiazhuang, 050043, China
  • Lizhong Song School of Electronics and Information Engineering Harbin Institute of Technology, Weihai, 264209, China
  • Fenggang Yan School of Electronics and Information Engineering Harbin Institute of Technology, Weihai, 264209, China
  • Xiaolin Qiao School of Electronics and Information Engineering Harbin Institute of Technology, Weihai, 264209, China
  • Shanna Zhuang School of Information Science and Technology Shijiazhuang Tiedao University, Shijiazhuang, 050043, China

Keywords:

Aperture coupled antenna, DOA estimation, H-shaped coupling slot, low profile, passive radar, unequal power sources

Abstract

In this paper, an aperture coupled microstrip antenna with extremely low profile (0.022?c, ?c is the wavelength of the center frequency) is proposed and then applied to direction of arrival (DOA) estimation for unequal power sources. Two serial coupling slots resonating at connected frequencies are employed to expand the bandwidth of this microstrip antenna with extremely low profile. Compared with the microstrip antenna fed by a single coupling slot, the bandwidth is increased to 1.37% by using two serial coupling slots. Measurements of the antenna prototype exhibit 6.63% bandwidth (S11 < ?10 dB) and agree well with the simulation results. The measured antenna gain is 5.79 dBi, and the 3 dB beam width is 56° and 112° in the E-plane and H-plane, respectively. In addition, the crosspolarization level of the prototype is ?20 dB down from the co-polarization. Finally, the proposed antenna is applied in the DOA estimation for unequal power sources. Simulation results confirmed that the proposed antenna is effective and can be used in passive radar application.

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Published

2021-08-10

How to Cite

[1]
Yong Han, Qingyuan Fang, Lizhong Song, Fenggang Yan, Xiaolin Qiao, and Shanna Zhuang, “DOA Estimation for Unequal Power Sources using Extremely Low Profile Aperture Coupled Microstrip Antenna”, ACES Journal, vol. 31, no. 09, pp. 1100–1109, Aug. 2021.

Issue

2016: Vol 31 Iss 9

Section

General Submission