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A novel planar multimode bandpass filter with radial perturbation

✍ Scribed by Kaixue Ma; Kiat Seng Yeo; Qiang Sun

Book ID
102521933
Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
174 KB
Volume
51
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A novel multimode bandpass filter with good rejection band is proposed by using a radial stub. The radial stub cannot only perturb the traditional resonator for the multimode operation but also generate additional zero point at the stopband for the stopband control. With proper input/output coupling, additional two poles, that is, four poles, can be achieved for the proposed filter structure. The experimental results of the four‐mode filter show low insertion loss, good stopband performance, and compact size. Β© 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 964–966, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24258

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GHz. For this reason, the spacing t was selected to be 1.0 mm for the prototype constructed here. The radiation characteristics of the constructed prototype were also studied. Figures 7 and8 plot the measured radiation patterns at the center frequencies (2442 and 5500 MHz) for the 2.4-GHz and 5.2/5