A microstrip three-port and four-channel multiplexer for WLAN and UWB coexistence

Author

Lai, Ming-Iu ; Jeng, Shyh-Kang

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

53

Issue

10

fYear

2005

Firstpage

3244

Lastpage

3250

Abstract

This paper proposes a microstrip three-port four-channel multiplexer for wireless systems where wireless local area network (WLAN) and ultra-wideband (UWB) coexist. The proposed multiplexer has two channels, from 2.15 to 2.89 GHz and from 5.13 to 5.84 GHz, for WLAN and two channels, from 3.22 to 4.83 GHz and from 6.07 to 8.22 GHz, for UWB. The measured scattering parameters agree well with the simulations. To determine a proper circuit topology and overcome the interference problems between ports, the genetic algorithm (GA) technique is exploited. The GA search takes approximately 3 min on a personal computer with a 2.4-GHz microprocessor. Additionally, the analysis of the circuit behaviors, the problem on the size of the multiplexer, and the isolation issues between WLAN and UWB ports are discussed.

Keywords

S-parameters; genetic algorithms; microstrip components; multiplexing equipment; multiport networks; ultra wideband communication; wireless LAN; 2.15 to 8.22 GHz; UWB; WLAN; circuit topology; genetic algorithm; interference problems; microstrip four-channel multiplexer; microstrip three-port multiplexer; scattering parameters; ultra-wideband; wireless local area network; Circuit simulation; Circuit topology; Computational modeling; Genetic algorithms; Interference; Microstrip; Multiplexing; Scattering parameters; Ultra wideband technology; Wireless LAN; Genetic algorithm (GA); microstrip;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2005.855136

Filename

1516331