IEICE Electronics Express
Online ISSN : 1349-2543
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A novel 94 GHz planar integrated monopulse array antenna with hybrid feeding networks
Wang WeiZou LeWang Xuetian
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2018 Volume 15 Issue 12 Pages 20180381

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Abstract

A W-band low-sidelobe high-gain planar integrated monopulse array antenna is presented in this paper. The antenna comprises two PCB layers, one is 16 × 41 units series-fed patch arrays and the other is a low-loss slot feeding network based on substrate integrated waveguide (SIW) technology. A W-band waveguide magic T is used in this design in order to get sum and difference beams in horizontal azimuth. Such a two-layer integrated array antenna can be fabricated with standard multi-layer PCB process. The maximal measured gain of the proposed antenna is 26.63 dB, while the maximal null-depth is measured to be is −32.1 dB. Quarter-wavelength transformers are used to achieve Taylor’s amplitude distribution in order to suppress sidelobe. The measured sidelobe level in the vertical plane is within the range of −25.7 dB to −26.4 dB. The designed monopulse array antenna has great practical value in W band portable radar.

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© 2018 by The Institute of Electronics, Information and Communication Engineers
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