Novel Dual-Mode Circular Patch Bandpass Filter with Enhanced Stopband Performance(Microwaves, Millimeter-Waves)

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概要

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• This investigation proposed a novel dual-mode circular patch bandpass filter (BPF) with enhanced stopband performance. The novelty of the proposed structure is to use a pair of square etched areas acting as a perturbation element on the circular patch resonator such that two split modes are coupled and the filter structure can be reduced. The coupling coefficients of two split modes are obtained. To improve the stopband performance, a pairs of H-shaped defected ground structure (DGS) cells are used below the input/output port to suppress the spurious response of the proposed BPF. The equivalent circuit of the DGS cell is discussed and the relations between bandstop characteristic and the suitable DGS dimensions are also investigated. The proposed BPF is demonstrated with a central frequency f_0=2.2GHz, a 3-dB fractional bandwidth of 8% and a wider stopband of -35dB from 2.5 to 6GHz. Measured results of experimental filter have good agreement with the theoretical simulated results.

• 社団法人電子情報通信学会の論文
• 2005-09-01

著者

• Weng Min

  National Nano Device Laboratories

関連論文

• Dual-Mode Ring Bandpass Filter Using Defected Ground Structure with a Wider Stopband(Microwaves, Millimeter-Waves)
• High Spurious Suppression of the Dual-Mode Patch Bandpass Filter Using Defected Ground Structure(Microwaves, Millimeter-Waves)
• Novel Dual-Mode Circular Patch Bandpass Filter with Enhanced Stopband Performance(Microwaves, Millimeter-Waves)

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