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COMPACT SINGLE-LAYER BALANCED EIGHTH-MODE SUBSTRATE INTEGRATED WAVEGUIDE BANDPASS FILTER WITH HIGH SELECTIVITY
摘要： This letter proposes a compact single-layer balanced bandpass ?lter (BPF), which is realized by a new arrangement of eighth-mode substrate integrated waveguide (EMSIW) cavities. Under di?erential-mode (DM) operation, the half bisection topology of the proposed EMSIW ?lter can be equivalent to a quadruplet scheme based on four coupled EMSIW cavities. The negative cross coupling can be easily realized by the nature of the fringe electric ?elds of opened ends of EMSIW cavities. For the demonstration, a balanced EMSIW ?lter with the operating frequency at 2.4 GHz is designed, fabricated, and measured.
关键词： eighth-mode substrate integrated waveguide,compact size,high selectivity,balanced bandpass filter
更新于2025-09-19 17:13:59
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Eighth-mode SIW based compact high gain leaky-wave antenna
摘要： In this article, a novel electrically small eighth-mode substrate integrated waveguide (EMSIW) based leaky-wave antenna (LWA) in planar environment is presented. The proposed antenna uses 1/8th mode SIW resonator which helps to improve compactness of the design while maintaining high gain and increased scanning angle. The proposed SIW cavity is excited by a 50 Ω microstrip line feeding to resonate at dominant TE110 mode in X-band. The dimensions of the resonators are adjusted to keep resonant mode at same frequency. The fabricated prototype is approximately 5λ0 long. Measured results show that the proposed leaky-wave antenna is able to operate within frequency range of 8-10 GHz with beam scanning range of 51° and maximum gain of 13.31 dBi.
关键词： frequency beam scanning,eighth-mode substrate integrated waveguide,leaky-wave antenna
更新于2025-09-10 09:29:36