Title :
The Miniature 2.4/5.2 GHz Dual-Band Bandpass Filter with Modified Hairpin Structure
Author :
Kung, Cheng-Yuan ; Chen, Ying-Chung ; Yang, Cheng-Fu ; Houng, Mau-Phon
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-sen Univ., Kaohsiung
Abstract :
A compact dual-band bandpass filter is designed to operate at 2.4/5.2 GHz without any input/output impedance matching. This filter is constructed of three resonators which are based on the stepped impedance resonators and hairpin resonators. The A1203 ceramic with a thickness of 0.6 mm and a relative dielectric constant of 9.4 was adopted as substrate. It is easy to be integrated with other RF circuits by SOP (System on Package) process. The three-order dual-band bandpass filter is optimally designed and its properties are confirmed by experiment. By the high dielectric constant substrate and modified structure, the optimized device exhibits excellent dual- band filtering performances and small size. The size of the proposed filter can be reduced about 32.5% in comparing to the typical hairpin filters.
Keywords :
band-pass filters; high-k dielectric thin films; impedance matching; microstrip resonators; permittivity; radiofrequency integrated circuits; resonator filters; system-in-package; RF circuits; dual-band bandpass filter; dual-band filtering; hairpin filters; hairpin resonators; high dielectric constant substrate; impedance matching; modified hairpin structure; relative dielectric constant; stepped impedance resonators; system on package process; Band pass filters; Ceramics; Circuits; Dielectric constant; Dielectric substrates; Dual band; Impedance matching; Packaging; Radio frequency; Resonator filters;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554790
