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Compact dual-band microstrip bandpass filter using folded linear tapered-line resonator

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2 Author(s)
Nikravan, M.A. ; Fac. of Electr. & Comput. Eng., Tarbiat Modares Univ., Tehran, Iran ; Atlasbaf, Z.

A compact microstrip bandpass filter for WLAN dual-band applications is designed and fabricated. New folded linear tapered-line resonators (LTLRs) are proposed to provide dual-band behaviour besides reducing the size of the filter. A third-order Chebyshev filter is designed and fabricated using these resonators. A size reduction of 30% is achieved comparing with the traditional Hairpin filters using stepped-impedance resonators (SIRs). The prototype of the filter achieved insertion loss of 2dB and 2dB, return loss of 16dB and 21dB and bandwidth of 4.1% and 7.7% at 2.44 and 5.34GHz respectively, which are in good agreement with simulated results.

Published in:

Microwave Conference Proceedings (APMC), 2010 Asia-Pacific

Date of Conference:

7-10 Dec. 2010

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