Referenced Items are not available for this document.
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.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:21
,
Issue:
7
)
Date of Publication: July 2011
- Page(s):
- 353 - 355
- ISSN :
- 1531-1309
- INSPEC Accession Number:
- 12141553
- Digital Object Identifier :
- 10.1109/LMWC.2011.2157232
- Product Type:
- Journals & Magazines
- Date of Publication :
- 09 June 2011
- Date of Current Version :
- 04 July 2011
- Issue Date :
- July 2011
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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