Signal-to-interference ratio improvement by using a phased array antenna of switched-beam elements

Author

Ngamjanyaporn, Phaisan ; Phongcharoenpanich, Chuwong ; Akkaraekthalin, Prayoot ; Krairiksh, Monai

Author_Institution

Res. Center for Commun. & Inf. Technol., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

Volume

53

Issue

5

fYear

2005

fDate

5/1/2005 12:00:00 AM

Firstpage

1819

Lastpage

1828

Abstract

A phased array antenna of switched-beam elements is proposed to improve the signal-to-interference ratio (SIR). By using 1-bit phase shifters, the main beam of the array is switched to desired signal direction, and with the switched-beam patch antenna elements the patterns are changeable. The results of radiation patterns show that the interference suppression can be improved. Moreover, the SIR measurement is also set up in multipath environment to ensure the array performance. It is found that the SIR is significantly affected by the multipath environment; however, the SIR improvement of more than 10 dB can be obtained by changing the patterns.

Keywords

antenna phased arrays; antenna radiation patterns; interference suppression; microstrip antennas; multipath channels; phase shifters; 1-bit phase shifters; PIN diode; SIR; antenna radiation pattern; interference suppression; multipath environment; phased array antenna; signal-to-interference ratio; switched-beam patch antenna element; Antenna arrays; Communication switching; Fading; Interchannel interference; Microstrip antenna arrays; Patch antennas; Phase shifters; Phased arrays; Switches; Wireless communication; 1-bit phase shifter; PIN diode; patch antenna; phased array antenna; signal-to-interference ratio (SIR); switched-beam antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2005.846759

Filename

1427943