Communications: radio wave antennas – Antennas – With vehicle
Reexamination Certificate
2005-03-15
2005-03-15
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
With vehicle
C343S704000
Reexamination Certificate
active
06867739
ABSTRACT:
An improved diversity antenna system for moving vehicles is distinguished, inter alia, by the following features:the diversity antenna system can be retrofitted,the first antenna connection (17′) is formed by the first heating connection (17), the first heating line (17a) and/or the first busbar (3) of the heating panel (1),the second antenna connection (23′) is formed by the second heating connection (23), the second heating connecting line (23a) and/or the second busbar (3′) of the heating panel (1),the device for producing different terminating impedances or reactances of different magnitude comprises a tuning box (31), andthe tuning box (31) has one or more circuits, via which the magnitude of the terminating impedances or reactances which are formed in the tuning box can be varied continuously or in analog form or a switching box (31′) is provided, having at least three integrated different terminating impedances or reactances.
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Lindenmeier et al; “Diversity-Effizienz Geschalteter Antennenstrukturen in Kraftfahrzeugen”; Institut fur Hoch-und Hochstfrequenztechnik; Universitat der Bundeswehr Munchen, Neubiberg, FRG.
Haidacher Florian
Prassmayer Peter Karl
Kathrein-Werke KG
Le Hoang-anh
Nixon & Vanderhye P.C.
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