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Highly linear reconfigurable UWB filters with independently controlled dual bandnotch
Author(s) -
Ahmad Waqas,
Budimir Djuradj
Publication year - 2016
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.30113
Subject(s) - reconfigurability , linearity , pin diode , intermodulation , passband , insertion loss , microwave , multi band device , band pass filter , electronic engineering , wimax , materials science , electrical engineering , optoelectronics , diode , engineering , telecommunications , wireless , amplifier , antenna (radio) , cmos
This letter proposes a high‐linearity reconfigurable lower ultra‐wideband (3.1–5.25 GHz) filter with independently controlled dual bandnotch at WiMAX 3.5 GHz band and satellite communication systems 4.2 GHz band. Reconfigurability has been achieved by the implementation of Graphene based switches (simulation only) and PIN diodes (measurements). The simulation and measurement results in OFF state show an entire bandpass response from 3.1 GHz to 5.25 GHz and with a very low insertion loss. In ON state, the results show that sharp rejections at 3.5 GHz and 4.2 GHz are achieved, with a low passband insertion loss. The two bandnotch operate independently of each other; thus allowing to control the behaviour of the required bandnotch. The third order intermodulation products were also measured in OFF and ON states and the linearity results have been presented. The filter is able to achieve a high performance with good linearity and no significant loss. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2639–2643, 2016