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Highly linear microstrip wideband bandpass filter with switchable notched band for wireless applications
Author(s) -
Rabbi K.,
Athukorala L.,
Panagamuwa C.,
Vardaxoglou J. C.,
Budimir D.
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27585
Subject(s) - pin diode , band pass filter , band stop filter , materials science , microwave , filter (signal processing) , electronic engineering , optoelectronics , microstrip , diode , electrical engineering , engineering , telecommunications , low pass filter
Abstract This article presents a highly linear reconfigurable bandpass filter embedded with a switchable notch structure to get a band‐notched characteristic at a specified frequency.A single PIN diode (BAP65‐02) is used for the purpose of switching the notch. An optical switch, comprised of a silicon dice activated using near infrared light is also investigated as an alternative to the PIN diode. While the PIN diode or the optical switch is in the ON state this reconfigurable filter behaves as a bandpass filter with a notch at 2.4 GHz in order to reject WLAN interference while a full band response is obtained in the OFF state. The proposed filter is able to achieve good linearity using PIN diode with IIP3 of 47 dBm and there is no significant loss. A prototype is fabricated, and measured results are compared to simulations. A good agreement has been achieved between simulated and measured results. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1331–1335, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27585