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

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APMC.2007.4554790

Filename

4554790