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Multi-antenna system

An antenna and antenna signal technology, applied in the direction of antenna, transmission system, antenna array, etc., can solve the problems of antenna selection, power supply active antenna connection/disconnection of antenna diagnosis, etc.

Inactive Publication Date: 2013-10-30
HARMAN BECKER AUTOMOTIVE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antenna selection, power supply, active antenna on / off, and antenna diagnostics are however difficult to implement when using a single feeder, assuming they are fully achievable

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0011] refer to figure 1 , an exemplary improved multi-band multi-antenna system includes a front end part 1 and a rear end part 2 connected via a feeder 3 such as a coaxial cable. The front end part 1 includes N antennas A 1 、A 2 ...A N , each antenna pair is specific to the frequency band and the antenna amplifier V 1 , V 2 ...V N Optimally, each antenna amplifier is connected between one of the N antennas and the crossover network 4 . A crossover network 4 may be included in the antenna amplifier V 1 , V 2 ...V N N bandpass filters FF connected downstream of 1 、FF 2 ...FF N , and their outputs are connected to each other to form the output of the crossover network 4. The output of the crossover network 4 is connected to the feeder 3 via a crossover network 5 such as Bias-T (high-pass-low-pass network), which is further connected to the control unit 7 via a splitter network 6 which derives from the DC supply voltage The useful AC signal is separated, and in the ...

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PUM

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Abstract

The invention discloses an antenna system that comprises a frontend portion and a backend portion connected to each other by a feed line. The frontend portion comprises multiple antennas that supply antenna signals, a first control unit for controlling the frontend portion dependent on control signals received from the backend portion, and at least one first crossover network that connects the feed line to the at least one first crossover network and the first control unit. The backend portion comprises multiple receivers, a second control unit that provides the control signals for the first control unit, and at least one second crossover network that connects the feed line to the at least one second crossover network and the receivers. The frontend and backend portions are configured to transmit via the feed line antenna signals from the frontend portion to the backend portion in certain frequency ranges and to transmit the control signals from the backend portion to the frontend portion in a frequency range other than the certain frequency ranges.

Description

technical field [0001] The present invention relates to radio frequency antennas and in particular to multiple antenna systems capable of operating in multiple frequency ranges. Background technique [0002] Antennas are usually connected to a transmitter or receiver via a feed line. Antennas used at radio frequencies are effective over a limited frequency range. When operation over a wide frequency range is required, multiple antennas are typically used, each optimized for a specific narrowband of frequency. The desired antenna is manually selected by a switch or other means of connecting the antenna's feed line to the transmitter or receiver. [0003] If the antenna is a so-called active antenna, ie includes an antenna (pre)amplifier, the antenna amplifier can easily be supplied with power and switched on and off on an individual basis in order to save power when the antenna is not in use. Furthermore, antenna diagnostics can be easily performed for each individual ante...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q1/50H01Q23/00H01Q5/10
CPCH04B1/0064H01Q21/30H04B1/18H04B1/40H01Q5/10H01Q21/00
Inventor K-A.贝克尔A.拉特泽尔
Owner HARMAN BECKER AUTOMOTIVE SYST