Removal of surface-wave induced radiation nulls for patch antennas integrated with vehicle windscreens

Author

Sambell, Alistair ; Lowes, Philip ; Korolkiewicz, Edward

Author_Institution

Dept. of Electr. & Electron. Eng. & Phys., Univ. of Northumbia, Newcastle upon Tyne, UK

Volume

45

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

176

Lastpage

177

Abstract

A solution to the problem of radiation nulls for patch antennas integrated with vehicle windscreens is presented. The nulls, attributable to surface waves within the windscreen superstrate, are removed by the addition of a thin resistive film to the windscreen surface. Analysis of the surface-wave modes at 5.8 GHz within two typical laminated windscreen structures coated with a resistive film shows a sheet resistance value of 50 Ω/sq to be appropriate. Polar-pattern results demonstrate the effectiveness of the technique in removing the radiation nulls without significantly reducing the forward gain

Keywords

antenna accessories; antenna radiation patterns; interference suppression; microstrip antennas; mobile antennas; radiofrequency interference; road vehicles; surface electromagnetic waves; forward gain; laminated windscreen structures; patch antennas; polar-pattern results; resistive film; sheet resistance; surface-wave induced radiation nulls; thin resistive film; vehicle windscreens; windscreen superstrate; Attenuation; Automotive components; Dielectrics; Maxwell equations; Null value; Patch antennas; Surface resistance; Surface waves; Tellurium; Vehicles;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.554255

Filename

554255