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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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X-BAND TRISECTION SUBSTRATE-INTEGRATED WAVEGUIDE QUASI-ELLIPTIC FILTER

By A. Ismail, M. S. Razalli, M. A. Mahdi, R. S. A. Raja Abdullah, N. K. Noordin, and M. F. A. Rasid

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Abstract:
A narrowband trisection substrate-integrated waveguide elliptic filter with coplanar waveguide (CPW) input and output ports is proposed and demonstrated for X-band applications. The filter is formed by incorporating metallized vias in a substrate (RT/Duroid) to create cross-coupled waveguide resonators. The result is an attenuation pole of finite frequency on the high side of the passband, therefore exhibiting asymmetric frequency response. The fabricated trisection filter with a centre frequency of 10.05 GHz exhibits an insertion loss of 3.16 dB for 3% bandwidth and a return loss of -20 dB. The rejection is larger than 15 dB at 10.37 GHz.

Citation:
A. Ismail, M. S. Razalli, M. A. Mahdi, R. S. A. Raja Abdullah, N. K. Noordin, and M. F. A. Rasid, "X-band trisection substrate-integrated waveguide quasi-elliptic filter," Progress In Electromagnetics Research, Vol. 85, 133-145, 2008.
doi:10.2528/PIER08081802
http://www.jpier.org/PIER/pier.php?paper=08081802

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