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Technical Paper

Terrestrial Television-Reception in Fast Moving Cars by Means of Antenna-Diversity-Techniques

1999-03-01
1999-01-0259
The present contribution is dedicated to the techniques being required for terrestrial television-reception in fast moving cars. The techniques to realize multi-antenna systems are described and examples of such systems for OEM-production are disclosed. In order to satisfy the condition of a stable picture also in a fast moving car a special technique for the selection of the receiving signal from the available antenna signals is necessary. Due to the limited bandwidth of the transmission path between the TV-station and the mobile station the picture RF-carrier signal and the audio RF-carrier signal must be subject to two different methods of diversity techniques both making use of the same set of broadband TV-antennas on the car.
Technical Paper

Integrated Backlite Antenna System for AM/FM and TV Broadcast Reception and for Mobile Telephone

1994-03-01
940264
With increasing number of mobile radio services (AM/FM/TV/phone/weatherband/remote control) the number of antennas required increases. For better quality of FM-reception antenna diversity must be applied. Mobile TV reception is almost impossible without antenna diversity. Therefore for some services more than one antenna is required. In the paper a multiantenna backlite system is presented. The antenna structures of the active receiving antennas are printed on the glass, partly simultaneously used as heaters. The phone antenna is mounted “on glass” in the middle of the screen at the upper edge of the window far away from passers-by. The electromagnetic field in the car is reduced by a shielding additionally printed on the screen.
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