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2018-06-03

Small Size Dielectric Image Line Based Leaky Wave Antenna with 3 h -Shaped Patches

By Du-Juan Wei, Jian-Ying Li, Bao Cao, and Wen-Xin Yan
Progress In Electromagnetics Research Letters, Vol. 76, 85-90, 2018
doi:10.2528/PIERL18031207

Abstract

A small size dielectric image line (DIL)-based leaky wave antenna (LWA) is proposed in this paper. Three H-shaped patches as radiation elements are periodically printed on top surface of DIL, which generates infinite higher order space harmonics, and the proposed antenna works at the first order mode. The H-shaped unit cell has high attenuation constant, which leads to power leaking quickly. So high radiation efficiency can be realized with only 3 unit cells. Simultaneously, the open stopband (OSB) is suppressed using H-shaped unit cells to get high efficiency at broadside. The working principle of the proposed antenna is analyzed, and the numerical results validate the theory analysis. Over the operating band (11.5~14.6 GHz), the proposed antenna covers 71° from -41° to 30° (including the broadside) with stable gain (8.7 dBi~10.6 dBi) varying less than 2 dBi. A prototype is fabricated and measured, which have good agreement with simulation results.

Citation


Du-Juan Wei, Jian-Ying Li, Bao Cao, and Wen-Xin Yan, "Small Size Dielectric Image Line Based Leaky Wave Antenna with 3 h -Shaped Patches," Progress In Electromagnetics Research Letters, Vol. 76, 85-90, 2018.
doi:10.2528/PIERL18031207
http://www.jpier.org/PIERL/pier.php?paper=18031207

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