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A new design of a tunable WLAN-band pass filter using a combination of varactor device, RF-choke and Hairpin-Defected Ground Structure

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6 Author(s)
Boutejdar, A. ; Dept. of Microwave & Commun. Eng., Univ. of Magdeburg, Magdeburg, Germany ; Omar, A. ; Senst, M. ; Burte, E.P.
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A novel compact electrical tunable microstrip band pass filter, realized by coupling two Hairpin-DGS resonators, is proposed. The tunability is achieved by embedding varactor diodes to the Hairpin-DGS resonators. The measured relative tuning range of the band pass filter is 23.5% with a fractional bandwidth of 8%. The measured insertion loss is 3.6 dB to 2.1 dB within the tuning range. The simulated and measured results show good agreement and validate the proposed approach.

Published in:

Microwave Conference (EuMC), 2011 41st European

Date of Conference:

10-13 Oct. 2011

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