Sharp-Rejection Wideband Bandstop Filters

Author

Divyabramham, Kandimalla ; Mandal, Mrinal Kanti ; Sanyal, Subrata

Author_Institution

Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur

Volume

18

Issue

10

fYear

2008

Firstpage

662

Lastpage

664

Abstract

In this letter, a novel transmission line configuration has been proposed to design a sharp-rejection, bandstop filter (BSF) with wide rejection bandwidth. The rejection bandwidth and the level of rejection are controlled by the characteristic impedances of the transmission lines. Design equations are obtained by using a lossless transmission line model. The proposed design has been verified in microstrip line by fabricating a prototype BSF of -20 dB fractional bandwidth of 100% at a stopband center frequency f₀ = 1.5 GHz. The filter structure is simple and easy to fabricate.

Keywords

band-stop filters; microstrip lines; transmission lines; filter structure; frequency 1.5 GHz; lossless transmission line model; microstrip line; sharp-rejection wideband bandstop filters; stopband center frequency; transmission line configuration; wide rejection bandwidth; Bandwidth; Equations; Filters; Frequency; Impedance; Microstrip; Propagation losses; Prototypes; Transmission lines; Wideband; Bandstop filter (BSF); coupled-line; microstrip line;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.2003452

Filename

4639560