Title :
A Novel Miniaturized Microwave Microstrip Filter Used Cross-Coupled Square Resonators
Author :
Cao, Ji-Gang ; Hu, Hao-Quan
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
A novel cross-coupled band-pass filter(BPF)based on the flute resonator is proposed in this paper. Due to the adoption of the same new configuration of coupling coefficient, the distance between the two loops is clearly shortened, which offers BPF an advantage of miniaturization. The configuration is characterized by a higher Q factor by introducing two transmission zeros in the transfer-function. Through the analysis of electromagnetic software CST to achieve the structural parameter of the coupling coefficient of this configuration, the band-pass filter used in K waveband and X waveband are designed in this experiment with dimension of 2.3times2.4 mm2 and 5.9times5.9 mm2 respectively. The X-band bandpass filter´s insertion loss (IL) of 3.2 dB, and the IL of the out-passband of 25 dB. The result of the experiment agrees well with emulate wave.
Keywords :
Q-factor; band-pass filters; microstrip filters; microwave filters; resonator filters; CST; K waveband; Q factor; X waveband; X-band bandpass filter; coupling coefficient; cross-coupled band-pass filter; cross-coupled square resonators; electromagnetic software analysis; flute resonator; insertion loss; loss 25 dB; loss 3.2 dB; microwave microstrip filter; miniaturization; structural parameter; transfer-function; transmission zeros; Band pass filters; Electromagnetic analysis; Electromagnetic coupling; Electromagnetic scattering; Filtering theory; Microstrip filters; Microstrip resonators; Microwave filters; Q factor; Resonator filters; bandpass filter; cross coupling; microwave filter; miniaturization; open-loop resonator;
Conference_Titel :
Art of Miniaturizing RF and Microwave Passive Components, 2008. IMWS 2008. IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2876-2
Electronic_ISBN :
978-1-4244-2877-9
DOI :
10.1109/IMWS.2008.4782295
