Title :
Annular slot windshield antenna
Author :
Walton, Eric K. ; Abou-Jaoude, Ramzi ; Pekar, Michael E.
Author_Institution :
ElectroSci. Lab., Ohio State Univ., Columbus, OH, USA
fDate :
8/1/1998 12:00:00 AM
Abstract :
An automotive AM/FM hidden antenna using the slot between the body of the automobile and a metal solar heat-reduction film in the front windshield is described. Such solar heat-reduction metal films are becoming common and thus represent an opportunity to incorporate an antenna at only marginal cost. The radio frequency (RF) input impedance and gain patterns are described, and techniques for impedance matching are shown. Theoretical and experimental antenna patterns are compared. A test range measurement system and experimental results is described. A mobile on-road system to characterize the antenna in urban and suburban environments is shown. The application of this mobile system to the measurement of calibrated gain patterns is also demonstrated
Keywords :
amplitude modulation; antenna radiation patterns; antenna testing; automobiles; calibration; electric impedance measurement; frequency modulation; impedance matching; mobile antennas; slot antennas; RF input impedance; annular slot windshield antenna; antenna patterns; automotive AM/FM hidden antenna; calibrated gain patterns measurement; experimental results; gain patterns; impedance matching; metal solar heat-reduction film; mobile on-road system; suburban environment; test range measurement system; urban environment; Antenna measurements; Antenna theory; Automobiles; Automotive components; Automotive engineering; Costs; Impedance matching; Radio frequency; Slot antennas; Solar heating;
Journal_Title :
Vehicular Technology, IEEE Transactions on
