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A novel crossed slotted patch dual-mode bandpass filter with two transmission zeros

✍ Scribed by Sean Wu; Min-Hang Weng; Shih-Bin Jhong; Maw-Shung Lee

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
358 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article presents a miniaturized dual‐mode bandpass filter (BPF) with two transmission zeros and low insertion‐loss using crossed slotted patch resonator. The BPF is mainly formed by a λ/2 patch resonator which is a pair of crossed slots with unequal widths is embedded in the center. By tuning the perturbation element, which resulted from the unequal slot widths along the diagonal, two resonant modes are excited and a pair of transmission zeros are generated to improve the selectivity of the BPF performance. The proposed filter at center frequency (f~0~) of 1.55 GHz has very good measured characteristics including the bandwidth of 1.49–1.62 GHz (3‐dB fractional bandwidth of 8.4%), low insertion loss of 1.74 ± 0.35 dB. The measured filter performance is in good agreement with the simulated response. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 741–744, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23219

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