Title :
Compact lowpass filter with wide stopband characteristics
Author :
Wei, Xu-Bo ; Wang, Peng ; Xu, Zi-Qiang ; Liao, Jia-Xuan ; Shi, Yu
Author_Institution :
Res. Inst. of Electron. Sci. & Technol., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper presents a compact lowpass filter (LPF) with wide stop-band. The LPF is realized by a compact microstrip resonant cell (CMRC) and shunt folded open stubs. Wide stopband characteristics can be achieved by introducing transmission zeros into the stopband. Measured results of the fabricated prototype show that the insertion loss is less than 1.5 dB (DC-10 GHz) and stopband bandwidth better than -20 dB is obtained from 15 to 40 GHz. The circuit only occupies 1.95 mm × 1.46 mm (0.16λg × 0.13λg).
Keywords :
band-stop filters; low-pass filters; microstrip filters; microwave filters; compact lowpass filter; compact microstrip resonant cell; frequency 0 GHz to 10 GHz; frequency 15 GHz to 40 GHz; shunt folded open stubs; transmission zeros; wide stopband characteristics; Filtering theory; Frequency measurement; Microstrip; Microwave filters; Passband; Resonator filters; Transmission line measurements;
Conference_Titel :
Computational Problem-Solving (ICCP), 2011 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4577-0602-8
Electronic_ISBN :
978-1-4577-0601-1
DOI :
10.1109/ICCPS.2011.6092237
