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Modified Compact Combline Filter Using Planar Parallel Coupled Structure with Extended Rejection Bandwidth
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 Title & Authors
Modified Compact Combline Filter Using Planar Parallel Coupled Structure with Extended Rejection Bandwidth
Kang, In-Ho; Wang, Kai; Li, Shang MIng;
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 Abstract
Modified compact combline bandpass filters are proposed based on the miniaturized quarter-wave transmission line which is composed of the parallel coupled line and lumped capacitors. The electrical length of the parallel coupled line in a resonator, which determines the size of combline bandpass filters, is just or , resulting in a compact circuit area. The designed combline bandpass filter also has a wide upper stopband by suppressing the spurious passbands, not moving. Measured results of two fabricated filters centered at 400MHz show good agreement with the theoretical predications.
 Keywords
Miniaturization;combline filter;parallel coupled line;
 Language
English
 Cited by
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