Design of a compact diplexer for multisystem DAS solutions

Author

Araníbar, Patricia Castillo ; Segovia-Vargas, Daniel ; García-Lampérez, Alejandro ; Salazar-Palma, Magdalena

Author_Institution

P.P. Ing. de Telecomun., Univ. Catolica San Pablo, San Pablo, Peru

fYear

2011

fDate

17-20 May 2011

Firstpage

1

Lastpage

5

Abstract

This paper presents a microstrip diplexer for multisystem Distributed Antenna System (DAS) solutions, namely for DCS and UMTS systems. A low-pass quasi-elliptic filter with a stub-like structure is used for the 1800 MHz band while a band-pass Chebychev filter with a hairpin line structure is employed for the 2150 MHz band. Both filters are connected to the common port through a T junction. The diplexer layout has been optimized in order to ensure compactness. Good agreement between simulated and measured results has been obtained. The diplexer shows excellent performance in terms of high isolation and low insertion loss. A semi-lumped element model of the diplexer is also presented.

Keywords

3G mobile communication; Chebyshev filters; antennas; band-pass filters; elliptic filters; low-pass filters; multiplexing equipment; DCS; T junction; UMTS system; band-pass Chebychev filter; compact diplexer; distributed antenna system; frequency 1800 MHz; frequency 2150 MHz; hairpin line structure; insertion loss; low-pass quasielliptic filter; microstrip diplexer; multisystem DAS solution; semilumped element model; stub-like structure; Band pass filters; Filtering theory; Loss measurement; Low pass filters; Microstrip filters; Microwave filters; Resonator filters; Chebychev; diplexer; hairpin line; quasi-elliptic;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications (CONATEL), 2011 2nd National Conference on

Conference_Location

Catolica San Pablo, Arequipa

Print_ISBN

978-1-4577-1046-9

Type

conf

DOI

10.1109/CONATEL.2011.5958663

Filename

5958663