Title :
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
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;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2008.2003452
