Open AccessSIW cavity‐backed self‐diplexing leaky‐wave antenna
Author(s) -
Shi Shujie,
Qian Zuping,
Cao Wenquan
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.2823
Subject(s) - antenna (radio) , leaky wave antenna , waveguide , slot antenna , beam waveguide antenna , substrate (aquarium) , materials science , beam (structure) , optics , coaxial antenna , acoustics , optoelectronics , engineering , electrical engineering , physics , antenna measurement , radiation pattern , microstrip antenna , geology , oceanography
A novel substrate integrated waveguide (SIW) cavity‐backed self‐diplexing leaky‐wave antenna (LWA) is presented. The proposed design consists of 16 SIW cavity‐backed slot elements. The SIW cavity‐backed slot element can be fed by two separate ports to resonate at two different frequencies and offer good intrinsic isolation between two input ports. The proposed element is a typical self‐diplexing antenna. By lining up these cavity‐backed slot elements in a column, serial feeding the lower parts and the upper parts of these cavities separately, the SIW cavity‐backed self‐diplexing LWA can be achieved. The upper part of the proposed antenna works in 11–13.9 GHz with beam scanning from −5° to 39°. Meanwhile, the lower part works in 7.1–9.4 GHz with beam scanning from −43° to 56°. The isolation between two input ports is better than 20 dB. The measured results of the fabricated antenna prototype verify the simulation analysis.