✦ LIBER ✦
Spurious suppression of a dual-mode bandpass filter using simple C-shaped electromagnetic bandgap cells
✍ Scribed by Hung-Wei Wu; Min-Hang Weng; Yan-Kuin Su; Cheng-Yuan Hung; Ru-Yuan Yang
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 180 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
This article proposes a dual-mode microstrip bandpass filter (BPF) with C-shaped electromagnetic bandgap (EBG) cells etched on the ground plane for spurious suppression. The C-shaped EBG cell is modeled as a parallel RLC resonator and the equivalent circuit parameters are extracted. The relationship between bandgap characteristic and dimension parameters of C-shaped EBG cell is discussed and the bandgap characteristic of C-shaped EBG cells on the filter performance is also investigated. The C-shaped EBG cells add a good stopband-rejection mode to the second harmonics of the dual-mode microstrip BPF
with suppression of over Ϫ40 dB, without affecting the center frequency and insertion loss of the original designed BPF. The experimented results verified the simulated results well.