Diverse SRRs Loaded Millimeter-Wav SIW Antipodal Linearly Tapered Slot Filtenna With Improved Stopband
Mengyun Hu, Zhiqiang Yu, Jun Xu, Ji Lan, Jianyi Zhou, Wei Hong
Abstract
An antipodal linearly tapered slot filtenna (ALTSFA) with diverse split-ring resonators (SRRs) is proposed. The ALTSFA is actually an antipodal linearly tapered slot antenna (ALTSA) fed by a substrate integrated waveguide (SIW) whose cutoff characteristic is utilized to obtain a lower band suppression. A broad-coupled complementary SRR (BC-CSRR) and 11 SRRs on the ALTSA are used to achieve an upperband suppression. Hence, filtering function with wide stopbands is achieved without enlarging its size and deteriorating the radiation performance. A prototype of the proposed ALTSFA was fabricated and measured, and a bandwidth ranging from 23.5 to 27.5 GHz, a maximum gain of 10 dBi, and a maximum out-of-band suppression of 20.55 dB are observed, validating its good performance. The proposed ALTSFA can be a promising candidate for compact fifth-generation mobile communications and beyond (5G/B5G) millimeter-wave communication system.