Title:
Modelling vehicular diversity antenna using loads on parasitic elements
Author(s):
L. Low, R. J. Langley
Source:
IWAT 2005. IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials
Vol./Issue/Date:
7-9 March
Year:
2005
Page(s):
501 - 504
Keywords:
Abstract:
Wireless communication devices are becoming increasing popular in today’s automobiles. There have been
increasing demands by consumers to include communications systems ranging from AM/FM radio, cellular
mobile, multimedia applications to navigation equipment in the automobile. Different antennas are needed
for these wireless systems. To avoid the use of multiple rod antennas on the roof of the automobile and to
preserve the aesthetic body design, hidden antennas are often used in the glass and plastic areas [1-2]. More
recently, to hide the antennas from view; an aperture in the roof has been used to house a variety of printed
communication antennas. The sizes of these apertures are usually no bigger than a sunroof and it is a
challenge to design several antennas for different applications in close proximity of each other. Moreover,
hidden antennas usually suffer from performance degradation due to radiation blockage and multi-path
interference. It is known that maximum selection, tracking and null matching antennas are able to reduce
fading. Hence, diversity system consisting of four or more antennas [3-4], each requiring an amplifier placed
in different locations of the automobile are commonly used to improve performance. This option can
increase manufacturing cost significantly and is not suitable if antenna placement is limited to small
apertures.
Document:
Reference Id:
89
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