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Evaluation of nonlinear distortion in optically switchable UWB filters
Author(s) -
Chakrabarty K.,
Rabbi K.,
Panagamuwa C.,
Kodogiannis V.,
Budimir Djuradj
Publication year - 2014
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.28277
Subject(s) - band stop filter , distortion (music) , filter (signal processing) , band pass filter , electronic engineering , microwave , voltage controlled filter , prototype filter , nonlinear distortion , materials science , optoelectronics , computer science , engineering , filter design , electrical engineering , telecommunications , low pass filter , cmos , amplifier
Abstract This article provides a complete evaluation of nonlinear distortion for a switchable ultrawideband (UWB) filter. The proposed structure can provide a good performance with very little loss. An optical switch is used to switch the filter from bandpass to bandstop response at the same UWB spectrum. The switch comprises of a silicon dice which can be activated using near infrared light. The switchable UWB filter behaves as a bandpass filter while the switch is in the ON state and acts as a bandstop filter while in the OFF state. The filter was fabricated with the optical switch incorporated in it. Distortion measure was carried out using 5 MHz digitally modulated signals such as WCDMA and LTE. Distortion analysis carried out on the optically reconfigurable filter proved it to be highly linear. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1092–1094, 2014