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A stable gain periodic microstrip leaky‐wave antenna with the open‐stopband eliminated
Author(s) -
Zhang Mingyu,
Zhang Chaoqun,
Zhou Song
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22722
Subject(s) - leaky wave antenna , stopband , microstrip , microstrip antenna , radiation pattern , bandwidth (computing) , antenna (radio) , antenna gain , beam steering , optics , acoustics , physics , materials science , beam (structure) , antenna efficiency , electrical engineering , engineering , telecommunications , band pass filter
A novel periodic microstrip leaky‐antenna (LWA) with the open‐stopband (OSB) eliminated and the stable gain is proposed. The energy is radiated mainly through a periodic slot array. Each period of the proposed periodic leaky‐antenna (P‐LWA) is consist of one transversal slot, two oblique slots, one parasitic patch, one narrow transversal slot and one metallic via. The elimination of the OSB and the stable gain can be achieved by adjusting the positions of the metallic vias, the sizes of the slots and the positions of the parasitic patches. A P‐LWA prototype operating between 8 and 10.2 GHz is built and tested to validate the design. The measured scanning range of the proposed P‐LWA is from −33 to +32°. During the whole operational frequency bandwidth, the measured peak gain of 10.78 dBi is achieved, and a non‐degraded gain of 10.76 dBi is obtained at broadside. The gain variation while the beam is scanning from −26 to +16° is within 0.7 dB, demonstrating excellent gain stability. The antenna occupies the size of 269 mm × 14.8 mm × 1.5 mm, and the simulated radiation efficiency of the proposed antenna is higher than 90% in the operating range. It can be potentially applied in a variety of industrial systems, such as the multi‐point communication systems and the automotive radar systems. It is not very common for designs to satisfy both the continual beam scanning and the stable gain at the same time.