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In this paper, a modified magic-T using substrate integrated waveguide (SIW) and slotline is proposed and developed for RF/microwave applications on the basis of the substrate integrated circuits (SICs) concept. The modified planar magic-T consists of an 180° phase-reversal T-junction and an H-plane SIW T-junction. An optimized wideband magic-T structure is demonstrated and fabricated. Measurement...
In this paper, we present a systematic analysis of periodic structures based on substrate integrated waveguide (SIW) technology. In the periodic structures of interest, the unit cell is a circularly-shaped SIW section, which can be extended to any shape. In the beginning, the propagation constants of both even and odd modes of the SIW periodic structures are accurately extracted with the help of a...
This paper presents a novel electronically tunable substrate integrated waveguide (SIW) cavity resonator at microwave frequency. The resonant frequency of the cavity is tuned with different DC biasing voltages applied over a varactor coupled to the cavity. This structure has been analyzed with a full-wave software package. To validate our analysis, an X-band reflective tunable SIW cavity resonator...
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