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• W2897811175 abstract "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 16× 16 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." @default.
• W2897811175 created "2018-10-26" @default.
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• W2897811175 date "2018-12-01" @default.
• W2897811175 modified "2023-10-16" @default.
• W2897811175 title "<inline-formula> <tex-math notation=LaTeX>$W$ </tex-math> </inline-formula>-Band Low-Profile Monopulse Slot Array Antenna Based on Gap Waveguide Corporate-Feed Network" @default.
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• W2897811175 doi "https://doi.org/10.1109/tap.2018.2874427" @default.
• W2897811175 hasPublicationYear "2018" @default.
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