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Ultra-Broadband Car Antennas for Communications and Navigation Applications


E. Gschwendtner, W. Wiesbeck

Universität Karlsruhe

This paper presents two different ultra-broadband antenna designs for mobile communications and navigation, which can be integrated conformally into the bodywork of a car. Both antennas are based on the frequency-independent spiral structure. One antenna, which is intended to be integrated into the car’s window, is an externally fed spiral antenna in order to obtain a flat structure. The second spiral antenna consists of four arms which are fed by a coplanar waveguide transmission line. This enables the excitation of two different radiation patterns for terrestrial and satellite services.With a low cost feed network both radiation modes can be excited simultaneously and independently of each other. Measurement results are presented within and beyond the specifications.

IEEE Transactions on Antennas and Propagation

2003

August

51

8

2020-2027
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