Title :
A compact lowpass filter with ultra-wide stopband using novel resonance cell
Author :
Tang, W. ; Yang, X.B. ; Zuo, L.H.
Author_Institution :
RIEST, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel compact microstrip resonant cell (CMRC) with wide stopband characteristics to design a low pass filter with wide stopband and high rejection is presented. The designed lowpass filter is implemented by cascading two cells with different dimensions. Compared with a conventional CMRC, this work shows the advantages of smaller size, only 7.3*3.7mm2, and high rejection as well as wider stopband. Measured results of the fabricated prototype show that the insertion loss is less than 1 dB in the whole passband, stopband bandwidth better than -20 dB is obtained from 5.7 to 33 GHz and better than -10 dB is obtained from 5.1 to 40 GHz, which is an great improvement of 154.8% from a conventional CMRC.
Keywords :
band-pass filters; band-stop filters; low-pass filters; microstrip filters; microstrip resonators; resonator filters; CMRC; bandwidth 5.1 GHz to 40 GHz; cell cascading; compact lowpass filter; compact microstrip resonant cell; high rejection; insertion loss; low pass filter design; passband filter; stopband bandwidth; ultra-wide stopband; wide stopband characteristics; Bandwidth; Filtering theory; Loss measurement; Microstrip; Microstrip filters; Microwave filters; Resonator filters; CMRC; LPF; microstrip; stopband;
Conference_Titel :
Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-1893-8
DOI :
10.1109/MMWCST.2012.6238163
