Title :
A miniature dual-mode microstrip bandpass filter at 15.5GHz
Author :
Xu Liu ; Haoquan Hu
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A miniature dual-mode microstrip bandpass filter at the central frequency of 15.5GHz is proposed using a half-wavelength (λ/2) stepped-impedance resonator (SIR) with a pair of symmetrical T-type tap-connected open-ended stubs. Such paired stubs with total length of about λ/2 constructs an equivalent line resonator. Distinct characteristics of this new type of dual-mode filter are investigated using full-wave electro-magnetic simulations. Two transmission poles can be achieved inside the passband. Meanwhile, the T-type stubs are adjusted slightly to realize a transmission zero at high-rejection band. Good agreements are obtained between its measured and simulated S-parameters.
Keywords :
S-parameters; band-pass filters; microstrip filters; resonators; S-parameters; equivalent line resonator; frequency 15.5 GHz; full-wave electromagnetic simulations; half-wavelength SIR; half-wavelength stepped-impedance resonator; high-rejection band; miniature dual-mode microstrip bandpass filter; symmetrical T-type tap-connected open-ended stubs; transmission poles; transmission zero; 15.5GHz; dual-mode; microstrip bandpass filter; stepped-impedance resonator; wide stopband;
Conference_Titel :
Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2011
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-9792-8
DOI :
10.1109/CSQRWC.2011.6037022
