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2014-03-04

Planar Bandpass Filter with 100-dB Suppression Up to Tenfold Passband Frequency

By Boris Afanasievich Belyaev, Alexey Mikhailovich Serzhantov, Vladimir V. Tyurnev, Yaroslav F. Bal'va, and Aleksandr Leksikov
Progress In Electromagnetics Research C, Vol. 48, 37-44, 2014
doi:10.2528/PIERC14013003

Abstract

This paper proposes a miniature microwave bandpass filter. It comprises quasi-lumped suspended substrate stripline resonators of a new type. Their common substrate consists of two contiguous dielectric layers. Every resonator in the filter has three parallel strip conductors. Two of them are placed on the outer substrate surfaces and the rest is placed inside the substrate. The filter of the sixth order was designed with the use of special optimization rules that are universal for all resonator filters. The substrate of the fabricated filter was made of RT/Duroid 5880 (εr = 2.2, tan δ =0.002) with thickness of 0.127 mm. It has dimensions of 12 mm x 45.5 mm. The measured passband has a center frequency of 1.01 GHz, 3-dB fractional bandwidth of 11%, and minimum insertion loss of 1.4 dB. The 100-dB upper stopband extends up to 10.5 GHz.

Citation


Boris Afanasievich Belyaev, Alexey Mikhailovich Serzhantov, Vladimir V. Tyurnev, Yaroslav F. Bal'va, and Aleksandr Leksikov, "Planar Bandpass Filter with 100-dB Suppression Up to Tenfold Passband Frequency," Progress In Electromagnetics Research C, Vol. 48, 37-44, 2014.
doi:10.2528/PIERC14013003
http://jpier.org/PIERC/pier.php?paper=14013003

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