Design of the monoblock duplexer for the application of cellular band repeater

Author

Lee, Duck-jae ; Jang, Gil-du ; Park, Seong-Ook ; Wang, Young-seong ; Lee, Chung-Kook

Author_Institution

Lattron Co., Daejon, South Korea

Volume

2

fYear

2001

fDate

2001

Firstpage

621

Abstract

In wireless communication the demand for handsets is increasing. A duplexer is the critical component of a handset for mobile communication, to separate the transmitting and receiving signals. Thus the need of the duplexer for a repeater is also increasing. In this paper the design of a duplexer for a repeater is presented. We present a transmission line Chebyshev filter which is referred to as a uniform impedance resonator (UIR). By using conventional filter theory, we extract the equivalent circuit. The paper presents a simple pattern that is easy for mapping one to one with circuit components. A duplexer for cellular band (824 - 849 MHz for tx band and 869 - 894 MHz for rx band) is designed and fabricated. The design procedure is presented and validated by simulation results and the performance of the fabricated duplexer

Keywords

Chebyshev filters; band-pass filters; cellular radio; equivalent circuits; radio receivers; radio transmitters; resonator filters; 824 to 849 MHz; 869 to 894 MHz; cellular band repeater; equivalent circuit; filter theory; handset; mobile communication; monoblock duplexer; receiving; transmission line Chebyshev filter; transmitting; uniform impedance resonator; wireless communication; Chebyshev approximation; Distributed parameter circuits; Filtering theory; Impedance; Mobile communication; Repeaters; Resonator filters; Telephone sets; Transmission line theory; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Info-tech and Info-net, 2001. Proceedings. ICII 2001 - Beijing. 2001 International Conferences on

Conference_Location

Beijing

Print_ISBN

0-7803-7010-4

Type

conf

DOI

10.1109/ICII.2001.983649

Filename

983649