Compact tunable bandstop filters using Defected Microstrip Structure for multi-standard wireless systems

Author

Chakrabarty, Krishnendu ; Budimir, D.

Author_Institution

Wireless Commun. Res. Group, Univ. of Westminster, London, UK

fYear

2013

fDate

6-10 Oct. 2013

Firstpage

1031

Lastpage

1034

Abstract

A novel compact tunable bandstop filter using Defected Microstrip Structure (DMS) is presented in this paper. The structure utilizes a modified T shaped DMS which helps in miniaturization of the filter. To verify the concept, one such filter was simulated, designed, fabricated and tested. Measurements on a fabricated tunable filter confirm the accuracy of the design procedure. The tuning range of 20% is achieved, ranging from 2.26 GHz to 2.747 GHz. Tuning is achieved by using NXP BB179 varactor diode. A nonlinear distortion evaluation in a tunable filter was experimentally verified. Experimental verification shows the filter is highly linear.

Keywords

UHF filters; band-stop filters; diodes; microstrip lines; varactors; NXP BB179 varactor diode; compact tunable bandstop filter; defected microstrip structure; frequency 2.26 GHz to 2.747 GHz; modified T shaped DMS; multistandard wireless systems; nonlinear distortion evaluation; Band-pass filters; Distortion measurement; Filtering theory; Microstrip filters; Microwave filters; Nonlinear distortion; Resonator filters; Defected Microstrip structure; bandstop; miniaturized; tunable filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2013 European

Conference_Location

Nuremberg

Type

conf

Filename

6686836