A Low-Sidelobe Millimeter-Wave SIW Cavity-Backed Slot Antenna Array with Simplified Feeding Structure
Zilin SunFoshan University,Foshan,Guangdong,China,528225Man YangFoshan University,Foshan,Guangdong,China,528225Rui‐Sen ChenFoshan University,Foshan,Guangdong,China,528225Guo‐Min YangFoshan University,Foshan,Guangdong,China,528225Qiang ShaoFoshan University,Foshan,Guangdong,China,528225Guan‐Long HuangFoshan University,Foshan,Guangdong,China,528225Zaid AhmadCOMSATS UniversityKhujayarov IlyosSamarkand branch of Tashkent University of Information Technology named after Muhammad Al-Khwarizmi
2025en
ABI
Abstract
A low-sidelobe millimeter-wave substrate integrated waveguide (SIW) cavity-back slot antenna array with simplified feeding structure is proposed. This design employs a waveguide to feed the antenna, where the radiation slots are directly excited by the electric field of the cavity mode TE<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">101</inf>. This approach eliminates the use of power dividing structure, bringing out a simplified feeding structure. By utilizing Chebyshev polynomials, a low-sidelobe 2×8 array antenna is designed, achieving sidelobe suppression of 21.76 dB.
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