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International Journal of Antennas and Propagation
Volume 2015, Article ID 570693, 5 pages
Research Article

Analysis and Design of Leaky-Wave Antenna with Low SLL Based on Half-Mode SIW Structure

1Key Laboratory of All Optical Network and Advanced Telecommunication Network of MOE, Beijing Jiaotong University, Beijing 100044, China
2Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

Received 13 October 2014; Accepted 6 February 2015

Academic Editor: Giuseppe Mazzarella

Copyright © 2015 Jiaying Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents a novel leaky-wave antenna based on the Half-Mode Substrate Integrated Waveguide (HMSIW) structure with low side lobe level. The effect of the structural parameters of the LWAs on the radiation performances is studied. Using beam-forming technique, the leakage loss factor α along the radiation aperture is designed in a tapered way by controlling the aperture depth along the structure. This controls the radiated power along the antenna aperture and finally achieves the radiation pattern with low SLL. Furthermore, the antenna structure is optimized to get an even lower SLL.