Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure

Abstract

In this paper, we first propose a metamaterial structure by etching the same two interdigital fingers on the upper ground of quarter mode substrate integrated waveguide (QMSIW). The simulated results show that the proposed QMSIWbased metamaterial has a continuous phase constant changing from negative to positive values within its passband. A periodic leaky-wave antenna (LWA), which consists of 11 QMSIW-based metamaterial unit cells, is designed, fabricated, and measured. The measured results show that the fabricated antenna achieves a continuous beam scanning property from backward −43 • to forward +32 • over an operating frequencyrange of 8.9 GHz-11.8 GHz with return loss better than 10 dB. The measured antenna gain keeps consistent with the variation of less than 2 dB over the operating frequency range with a maximum gain of 12 dB. Besides, the measured and simulated results are in good agreement with each other, indicating the significance and effectiveness of this method.

High gain and circularly polarized substrate integrated waveguide cavity antenna array based on metasurface

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A multi-frequency circularly polarized metasurface antenna array based on quarter-mode substrate integrated waveguide for sub-6 applications

“…A lot of researchers have obtained many positive achievements in the multi-frequency circularly polarized SIW antennas. [21,22] In Ref. [23], a novel SIW self-triplexing slot antenna is proposed for multiple frequency application.…”

Spoof surface plasmon polaritons excited leaky-wave antenna with continuous scanning range from endfire to forward

“…[1,2] Since it was first proposed, [3] LWAs have undergone more than 70 years of development, with forms ranging from rectangular waveguides to planar microstrips, to the current emerging electromagnetic structures. [4][5][6][7][8][9] In general, LWAs are divided into uniform and periodic structures. [10] The uniform structure of the LWA is simple, but has a significant limitation in the scanning range and can only perform forward scanning.…”