DocumentCode :
2943381
Title :
Miniaturized reconfigurable filter using PIN diode for UWB applications
Author :
Karim, M.F. ; Guo, Yong-Xin ; Chen, Z.N. ; Ong, L.C.
Author_Institution :
Institute for Infocomm Research, Agency for Science, Technology and Research (A*Star), 20 Science Park Road, #02-21/25, Science Park II, Singapore 117674
fYear :
2008
fDate :
15-20 June 2008
Firstpage :
1031
Lastpage :
1034
Abstract :
This paper reports a new compact design of UWB reconfigurable filter which switches from bandstop to bandpass filter using pin-diode. First, a unit cell is developed which consist of two bended open stubs of quarter-wavelength and a connecting stub of half-wavelength. Two unit cells are cascaded by inductive stub to form a bandstop filter. Avagopsilas RF pin diode is used to switch the filter from bandstop to bandpass filter at the same resonant frequency. The equivalent circuit model and its parameters are extracted. The measurement results for bandstop filter shows a rejection bandwidth is 5.2 GHz and the insertion loss in the passband is 0.6 dB. For the bandpass filter, the insertion loss is 2.1 dB and 3-dB bandwidth is from 3.6 GHz to 10.5 GHz. The area of novel unit cell filter is ( lambdag/4)2 at the centre frequency of the bandstop, while the area of the filter realized using the non bending stubs and connecting lines is 2( lambdag/4)2 for the same bandstop characteristics.
Keywords :
band-pass filters; band-stop filters; microstrip lines; p-i-n diodes; UWB reconfigurable filter; bandpass filter; bandstop filter; equivalent circuit model; inductive stub; miniaturized reconfigurable filter; pin-diode; resonant frequency; unit cell filter; Band pass filters; Bandwidth; Equivalent circuits; Insertion loss; Joining processes; Loss measurement; Passband; Radio frequency; Resonant frequency; Switches; microstrip line; pin diode; reconfigurable filter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest, 2008 IEEE MTT-S International
Conference_Location :
Atlanta, GA
ISSN :
0149-645X
Print_ISBN :
978-1-4244-1780-3
Electronic_ISBN :
0149-645X
Type :
conf
DOI :
10.1109/MWSYM.2008.4633011
Filename :
4633011
Link To Document :
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