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2921063 
Journal Article 
SIW magic-T with bandpass response 
Li, P; Chu, Hui; Chen, RuS 
2015 
Yes 
Electronics Letters
ISSN: 0013-5194 
51 
14 
1078-1079 
WOS:000357314600019 
A novel magic-T with bandpass filtering response using substrate integrated waveguide (SIW) technology is presented. The basic design concept is based on properly locating the two power-division ports in a dual-mode circular SIW cavity, whose field distributions are even or odd symmetric. Not only in-phase and out-of-phase operations can be achieved in the magic-T, but also filtering responses for the two operations can be obtained. This magic-T is fabricated in a single-layer PCB and measured results show that it is centred at 9 GHz with 70 MHz 3 dB bandwidth. Good measured performance of balance for magnitude (+/- 0.35 dB) as well as phase (0 degrees-5 degrees) is also obtained within the passband. 
substrate integrated waveguides; band-pass filters; power dividers; circular waveguides; printed circuits; substrate integrated waveguide technology; SIW magic-T; bandpass filtering response; power-division ports; dual-mode circular SIW cavity; field distributions; PCB; frequency 9 GHz; bandwidth 70 MHz 
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