Diversity antenna on a dielectric surface in a motor vehicle body
First Claim
1. A diversity antenna for connection to a receiver located on a conductively framed dielectric surface substantially assembled from rectangular partial surfaces in a body of a motor vehicle, comprising:
- an antenna conductor in a form of a wire disposed parallel to at least a portion of the conductive frame of the dielectric surface with a spacing of less than one fourth of the width of the existing dielectric surface, wherein said antenna conductor includes at least one interruption site defining a pair of antenna connection terminals and forming at least two antennas; and
at least one two-pole electronically controllable impedance network serially integrated in said at least one additional interruption site, wherein a position of said at least one interruption site with said pair of antenna connection terminals and a position of said at least one additional interruption site are selected so that a plurality of antenna signals available at different adjustments of said controllable impedance network are adequately decoupled to select a most suitable signal selected from said plurality of antenna signals.
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Accused Products
Abstract
A diversity antenna for the meter and decimeter wave ranges installed on a conductively framed dielectric surface in the body of a motor vehicle and substantially assembled from rectangular part surfaces, for example in a roof cutout or trunk with a dielectric trunk lid. A substantially wire-shaped antenna conductor is installed parallel with the conductive frame and spaced from a part thereof of the dielectric surface less than one fourth of the width of the dielectric surface. The wire-shaped antenna conductor has an interruption site which define a pair of antenna connection terminals. A two-pole, electronically controllable impedance network is incorporated in series in at least one additional interruption site. The position of the interruption site with the pair of antenna connection terminals, and the position of the additional interruption site are selected so that the antenna signals available at the different settings of the controllable impedance network are adequately decoupled in terms of diversity.
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Citations
28 Claims
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1. A diversity antenna for connection to a receiver located on a conductively framed dielectric surface substantially assembled from rectangular partial surfaces in a body of a motor vehicle, comprising:
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an antenna conductor in a form of a wire disposed parallel to at least a portion of the conductive frame of the dielectric surface with a spacing of less than one fourth of the width of the existing dielectric surface, wherein said antenna conductor includes at least one interruption site defining a pair of antenna connection terminals and forming at least two antennas; and
at least one two-pole electronically controllable impedance network serially integrated in said at least one additional interruption site, wherein a position of said at least one interruption site with said pair of antenna connection terminals and a position of said at least one additional interruption site are selected so that a plurality of antenna signals available at different adjustments of said controllable impedance network are adequately decoupled to select a most suitable signal selected from said plurality of antenna signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
at least one connection network connected to said pair of antenna connection terminals and having network components, and wherein ground-free and/or ground-based antenna signals each are adapted to the receiver via said network components; a switching processor for generating control signals and disposed in said connection network; and
said control signals being further transmitted to at least one of said electronically controllable impedance network via a control line connected to said connection network.
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23. The diversity antenna according to claim 1, comprising a diversity processor having a switching processor and electronic change-over switches, so that in the presence of a disturbed received signal in the receiver, a control signal for controlling said least one electronically controllable impedance network is generated in said switching processor, on the one hand, and, if need be, control signals of said switching processor are additionally generated for selecting ground-free or ground-based antenna signals with the help said electronic change-over switches, on the other hand, so that a multitude of switching possibilities and thus different received signals are available in any reception situation.
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24. The diversity antenna according to claim 22, wherein the dielectric surface is formed by the plastic trunk lid surrounded by the electrically conductive body of the motor vehicle as the conductive frame, and said connection network is mounted in the proximity of the trunk lid fastening connected to the ground of the vehicle, and that the ground point forms the high-frequency ground of the connection network, and is electrically connected to the trunk lid fastening.
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25. The diversity antenna according to claim 24, wherein for further diversifying the received signals or for forming two simultaneously available received signals, for diversity receivers with two inputs for in-phase superpositioning of the signals in the receiver in conjunction with a scanning diversity system, a first connection network is present in the proximity of the trunk lid fastening on the one side of the plastic trunk lid, and a second connection network is available in the proximity of the trunk lid fastening on the other side of the plastic trunk lid.
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26. The diversity antenna according to claim 25, wherein for providing a scanning diversity system, for the UHF frequency range, intermediate-frequency (IF) signals of the receiver are supplied to said first connection network via the HF/IF frequency switch and to the diversity processor for testing the received signals for disturbances, wherein electronic change-over switches present in said second connection network are controlled via an antenna connection cable connecting said first connection network with said second connection network by control signals of said switching processor with switching address feed, and the received signal selected via the switching address signal evaluation and electronic change-over switches is supplied to said electronic change-over switch in said first connection network for further selection via an antenna connection cable leading to the receiver.
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27. The diversity antenna according to claim 26, comprising television amplifiers for terrestrial television reception each comprising a connection to said wire antenna conductor are present in said antenna connection networks;
- said electronically controllable impedance networks being suitably distributed within the ring structure and include said impedance networks so that a strong UHF diversity reception in the UHF-range is provided.
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28. The diversity antenna according to claim 1, wherein the dielectric surface is inserted in a cutout of the metallic roof of the motor vehicle, and is preferably square shaped, and extends over a substantial major part of the width of the roof.
Specification