W-Band Low-Profile Monopulse Slot Array Antenna Based on Gap Waveguide Corporate-Feed Network
Artikel i vetenskaplig tidskrift, 2018

This paper presents a gap waveguide-based compact monopulse array antenna, which is formed with four unconnected layers, for millimeter-wave tracking applications at W-band (85–105 GHz). Recently developed gap waveguide technology removes the need for galvanic contact among metallic layers of waveguide structures, and thereby, makes the proposed antenna suitable for easy and low-cost manufacturing. In this context, a low-loss planar Magic-Tee is designed to be used in a monopulse comparator network consisting of two vertically stacked layers. The gap waveguide planar monopulse comparator network is integrated with a high-efficiency 16x16 corporate-fed slot array antenna. The measured results of the comparator network show the amplitude and phase imbalance values to be less than 0.5 dB and 2°, respectively, over the frequency band of interest. The fabricated monopulse array antenna shows relative impedance bandwidths of 21% with input reflection coefficients better than −10 dB for the sum and difference ports. The null in the difference radiation pattern is measured to be 38 dB below the peak of the sum radiation pattern at 94 GHz. The measured gain is about 30 dBi for the same frequency. The low-loss performance of the comparator network and the feed network of the proposed array, together with the simple and easy manufacturing and mechanical assembly, makes it an excellent candidate for W -band compact direction-finding systems.

high efficiency

monopulse antenna



Gap waveguide

slot array antenna


Abbas Vosoogh

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Abolfazl Haddadi

Gapwaves AB

Ashraf Uz Zaman

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Jian Yang

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Herbert Zirath

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Ahmed Kishk

Université Concordia

IEEE Transactions on Antennas and Propagation

0018926x (ISSN) 15582221 (eISSN)

Vol. 66 12 6997-7009 8485628

Waveguide-type semiconductor integrated circuits (ICs) in gaps between conducting surfaces with texture architecture, electromagnetic modeling and micromachining (GAPWAVE ICS)

Europeiska kommissionen (EU) (EC/FP7/321125), 2013-05-01 -- 2018-04-30.


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