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In this letter, a novel compact dual-band bandpass filter (BPF) is designed to achieve the characteristic of low insertion loss and high isolation for global position system (GPS)/wireless local area network (WLAN) applications. This BPF is implemented by properly selecting the impedance ratio (R) and physical length ratio (alpha) of the asymmetric stepped-impedance resonator (SIR) with one step discontinuity. The coupling coefficient between the coupled asymmetric SIRs is calculated by using full-wave simulator IE3D. The proposed filter has very good measured characteristics including a low insertion loss of 1.1 dB for both passbands, a high isolation insertion loss of 55 dB between the two passbands and a wide stopband rejection of 38 dB from 2.7 to 5.3 GHz. Good agreement with responses of electromagnetic (EM) simulation and measurement is compared.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:19
,
Issue:
12
)
Date of Publication: Dec. 2009
- Page(s):
- 780 - 782
- ISSN :
- 1531-1309
- INSPEC Accession Number:
- 10999039
- Digital Object Identifier :
- 10.1109/LMWC.2009.2033499
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 01 December 2009
- Issue Date :
- Dec. 2009
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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