Compact integrated diversity antenna for wireless communications

Author

Ko, Samuel C K ; Murch, Ross D.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China

Volume

49

Issue

6

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

954

Lastpage

960

Abstract

We introduce a compact integrated antenna that has two feed ports with more than 20 dB isolation between them. The significance of the design is that it can be utilized in compact wireless communication handsets to provide diversity signals or act as a duplexer allowing the receive and transmit signals to be well isolated. The antenna design is based on merging two patch antennas together in combination with capacitive loading so that a compact design can be obtained. Justification for the design is provided by considering the mutual coupling using the reaction principle and finite-dimensional time-domain (FDTD) simulations. Experimental results are also presented for a design that operates in the 2100-2200 MHz band for possible application in forthcoming third-generation wireless systems. Results include radiation patterns, S-parameters, and signal correlations between ports so that the diversity performance and isolation characteristics of the antenna can be demonstrated. These show that in typical wireless environments envelope cross correlations of less than 0.1 between the ports are obtained

Keywords

S-parameters; UHF antennas; antenna radiation patterns; correlation methods; diversity reception; finite difference time-domain analysis; land mobile radio; microstrip antennas; mobile antennas; simulation; telephone sets; 2100 to 2200 MHz; FDTD simulations; S-parameters; UHF; antenna design; antenna isolation characteristics; capacitive loading; compact integrated diversity antenna; compact wireless communication handsets; diversity performance; diversity signals; duplexer; envelope cross correlation; feed ports; finite-dimensional time-domain; mutual coupling; patch antennas; radiation patterns; reaction principle; receive signal; signal correlations; third-generation wireless systems; transmit signal; Antenna feeds; Finite difference methods; Loaded antennas; Merging; Mutual coupling; Patch antennas; Signal design; Telephone sets; Time domain analysis; Wireless communication;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.931154

Filename

931154