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2014-03-04
Planar Bandpass Filter with 100-dB Suppression Up to Tenfold Passband Frequency
By
Progress In Electromagnetics Research C, Vol. 48, 37-44, 2014
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 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://www.jpier.org/PIERC/pier.php?paper=14013003
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