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Wideband substrate integrated waveguide cavity‐backed spiral‐shaped patch antenna
Author(s) -
Liu Longsheng,
Wang Han,
Zhang Zhijun,
Li Yue,
Feng Zhenghe
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28844
Subject(s) - coaxial antenna , wideband , return loss , bandwidth (computing) , microstrip antenna , spiral antenna , antenna measurement , microwave , patch antenna , antenna factor , materials science , optics , optoelectronics , engineering , electronic engineering , electrical engineering , antenna (radio) , physics , telecommunications
A new technique for designing wideband substrate integrated waveguide (SIW) cavity‐backed antenna is presented in this article. The antenna element is composed of a spiral‐shaped patch and an SIW cavity fed by a coaxial probe. It takes advantage of a dual‐resonance observed in the proposed spiral‐shaped patch structure to enhance its bandwidth. A 2 × 1 array is designed to increase the antenna gain. To demonstrate the validity of the bandwidth enhancement technique, prototypes of the proposed antenna element and array for X‐band applications are fabricated and measured. The measure 10‐dB return loss bandwidth of the antenna element is 11.2% (10.306–11.531 GHz) while that of the array is 12.5% (10.292–11.66 GHz). © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:332–337, 2015