Wideband Bandpass Filter With Wide Stopband Using Loaded BCMC Stub and Short-Stub
In: IEEE Microwave and Wireless Components Letters, Jg. 21 (2011-07-01), S. 353-355
Online
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Zugriff:
In this letter, a compact wideband bandpass filter with a wide stopband is proposed. The filter is composed of three parts: a half-wavelength (λ/2) microstrip resonator with a loaded broadside-coupled microstrip/CPW (BCMC) stub, two λ/4 I/O feeding-lines, and two microstrip short-stubs. The loaded BCMC stub can not only introduce the perturbation to affect the λ/2 microstrip resonator acting as a dual-mode resonator, but also provide two transmission zeros to improve the upper passband selectivity and suppress the first odd-mode spurious. Then, to avoid the first even-mode spurious, two microstrip short-stubs are employed to obtain another transmission zero. Meanwhile, two λ/4 I/O feeding-lines are employed to obtain strong passband enhancement around the dual-resonances. To verify the mechanism mentioned above, a bandpass filter is designed. The proposed filter has the merits of low insertion loss, good passband selectivity, wide stopband, flat group delay, and a compact size.
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Wideband Bandpass Filter With Wide Stopband Using Loaded BCMC Stub and Short-Stub
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Autor/in / Beteiligte Person: | Luo, Xun ; Ma, Jianguo ; Li, Er-Ping |
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Zeitschrift: | IEEE Microwave and Wireless Components Letters, Jg. 21 (2011-07-01), S. 353-355 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2011 |
Medientyp: | unknown |
ISSN: | 1558-1764 (print) ; 1531-1309 (print) |
DOI: | 10.1109/lmwc.2011.2157232 |
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