EP1794838A1 - Amplificateur d'antenne de vehicule comportant des moyens de protection contre les decharges electrostatiques dans l'entree - Google Patents

Amplificateur d'antenne de vehicule comportant des moyens de protection contre les decharges electrostatiques dans l'entree

Info

Publication number
EP1794838A1
EP1794838A1 EP05792665A EP05792665A EP1794838A1 EP 1794838 A1 EP1794838 A1 EP 1794838A1 EP 05792665 A EP05792665 A EP 05792665A EP 05792665 A EP05792665 A EP 05792665A EP 1794838 A1 EP1794838 A1 EP 1794838A1
Authority
EP
European Patent Office
Prior art keywords
antenna
antenna amplifier
amplifier
frequency signals
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP05792665A
Other languages
German (de)
English (en)
Inventor
Dominik Strolz
Martin Kuhn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hirschmann Car Communication GmbH
Original Assignee
Hirschmann Car Communication GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hirschmann Car Communication GmbH filed Critical Hirschmann Car Communication GmbH
Publication of EP1794838A1 publication Critical patent/EP1794838A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the invention relates to an antenna amplifier of a vehicle for receiving high-frequency signals according to the features of the preamble of patent claim 1.
  • the invention is therefore based on the object to provide an antenna amplifier of a vehicle for receiving high-frequency signals, which additionally has protective measures, which ensures that interference signals at the input of the antenna amplifier, in particular electrostatic Discharge, not to affect the operation of the Antennenverstär ⁇ kers or even lead to damage.
  • the invention it is provided for high-frequency signals in the upper megahertz or lower gigahertz range that means are arranged upstream of the input of the antenna amplifier which filters out a spectral range of damaging portions of the high-frequency signals and for the useful signals of the high-frequency signals received by the antenna to the antenna amplifier are permeable.
  • the invention no longer solves the problem as before in the time domain, but in a surprising manner in the frequency domain. Because the damaging portions of the high-frequency signals, in particular the Shudigen ⁇ the ESD pulses, according to their temporal course, a spectrum in the frequency domain. This spectrum is harmful to the components in the input of the Antennen ⁇ amplifier and is filtered out according to the invention.
  • the means are such that they allow the desired signals (useful signals or useful components) of the high-frequency signals received by the antenna to pass unhindered from the antenna to the input of the antenna amplifier.
  • the time profile of the pulse essentially corresponds to a decaying e-function with a rapid increase. In the frequency domain, this results in a bandwidth-limited spectrum with high shares at low frequencies and upwardly decreasing energy content up to about 1 gigahertz. Therefore, the means are designed to filter out an ESD pulse with the frequency spectrum just described, so that it can no longer cause the damaging effect in the antenna amplifier.
  • the means are designed as filters with a high-pass characteristic.
  • the cutoff frequency of such a filter is chosen so that the higher frequency portions of the noise (in particular the ESD pulse) can be suppressed.
  • the cut-off frequency should be selected so that the attenuation at the useful frequency (useful part of the high-frequency signals) is as small as possible, so that no deterioration of the useful signal occurs. This can be achieved by suitable dimensioning of the components of the filter with high-pass characteristic.
  • the filter has a high order. At the same time thereby a low insertion loss for the useful signals can be achieved. Since the source impedance of the interference signals is low-impedance, series elements are necessary in an advantageous manner in order to realize an impressed interference voltage.
  • the means designed as a filter are designed as discrete components and / or printed strip lines.
  • the required filter properties can be set cost-effectively and efficiently in the required dimensioning.
  • high-pass filters can be implemented in a particularly cost-effective and efficient manner as a combination of discrete components (for example SMD components) and strip lines printed on a printed circuit board in the frequency range in question (also called the lower microwave range).
  • the required inductances are realized as a printed strip line, since inductances as discrete components in the frequency range in question here have too high tolerances, have disturbing parasitic capacitances and are cost-intensive.
  • a further advantage of the embodiment of the inductances as printed strip lines is that the required inductance value is infinitely adjustable, in which the planar extent, in particular the length of the strip line, is varied.
  • the filter means are dimensioned such that the useful frequency range lies above the spectrum of the interference signals, in particular the ESD pulses, and the high pass is dimensioned so that it filters out the entire ESD spectrum, but essential parts thereof, in the best case as far as possible has no or only a slight insertion loss for the useful signals.
  • the invention is particularly preferably used in antennas and input amplifiers for frequencies of GPS systems (navigation systems) for SDARS applications and in the L band.
  • FIG. 1 shows a receiving system for a vehicle
  • Figure 1 shows an example of a receiving system of a vehicle having an antenna 1 at a suitable location.
  • the antenna 1 does not only consist of a single antenna element but can also consist of two or more antenna elements 2, 3, 4.
  • multiple antenna elements are present. These can be designed differently, for example as rod antennas, as antenna conductor structures in or on vehicle components, in particular vehicle windows, and the like.
  • An antenna element 2, 3 or 4 are followed by means which are designed as a filter 5. are.
  • This filter 5 has an input E, to which the high-frequency signals received by the Antenneneiementen 2, 3, 4 are supplied.
  • An antenna amplifier 6 is connected downstream at an output A of the filter 5 and is designed as a low-noise receiver amplifier for high-frequency signals in the gigahertz range in a particularly advantageous manner.
  • This antenna amplifier 6 has an output 7, at which the received and amplified high-frequency signals to further downstream electronic devices, such as radio receiver, GPS receiver, TV tuner and the like are supplied.
  • the filter 5, in general the means, are designed so that they thoroughlyfiitem a spectral range of harmful portions of the received insectsfre ⁇ -frequency signals and for the useful signals (useful portions) of the harnessfre ⁇ frequency signals received by the antenna 1 to the Antennen ⁇ amplifier 6 are permeable.
  • each antenna element 2, 3, 4 or a group of antenna elements each have a filter 5 downstream.
  • the high-frequency signals of one of the antenna elements 2, 3, 4 are supplied to the input E by means of a switching device.
  • more than one antenna amplifier 6 is present, in which case each antenna amplifier 6 has its own filter 5, wherein the filter 5 is either connected upstream of the input stage of the antenna amplifier 6 (and thus spatially separated therefrom) or in the Antenna amplifier 6 itself is integrated.
  • the components that realize the function of the antenna amplifier nen ⁇ 6, together with the components that realize the function of the filter 5, on separate circuit boards, but in a common housing of the antenna amplifier 6 or on a common conductor ⁇ plate of the antenna amplifier 6 is arranged.
  • the last-mentioned variant has the particular advantage that short signal paths result since, in the frequency range in question here, these are particularly due to lower interference capacitances are beneficial.
  • plug connections with disturbing mechanical and electrical properties can be effectively avoided.
  • FIG. 2 shows an exemplary embodiment of means which are connected upstream of the input of the antenna amplifier 6 and which filter out a spectral range of damaging portions of the received high-frequency signals and which are permeable to the useful signal of the high-frequency signals received by the antenna 1 to the antenna amplifier 6.
  • This high pass of higher order (here fifth order, with lower orders are conceivable, but of particular advantage high passes or even higher order are applied) consists of capacitances 8 (series elements) and inductors 9.
  • the capacitances 8 are in the signal path between the antenna 1 and the Antenna amplifier 6 maral ⁇ tet, while the inductors 9 are guided to ground.
  • the capacitances 8 and / or the inductors 9 are designed as discrete components and / or as printed strip lines, with the inductors 9 being realized as a printed stripline, since conventional inductances in the frequency range in question here are too have large tolerances, have parasitic parasitic capacitances and are relatively expensive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Amplifiers (AREA)

Abstract

L'invention concerne un amplificateur d'antenne (6) de véhicule, destiné à recevoir des signaux haute fréquence. Selon l'invention, l'amplificateur d'antenne comporte une entrée servant à injecter, dans l'amplificateur d'antenne, les signaux haute fréquence reçus par une antenne (1) qui est connectée audit amplificateur d'antenne. Selon l'invention, les signaux haute fréquence se trouvent dans la plage mégahertz supérieure ou la plage gigahertz inférieure. En outre, des moyens qui suppriment, par filtrage, des composantes des signaux haute fréquence lesquelles nuisent à un domaine spectral, et qui laissent passer les signaux utiles des signaux haute fréquence reçus par l'antenne (1) en direction de l'amplificateur d'antenne (6), sont montés en amont de l'entrée de l'amplificateur d'antenne (6).
EP05792665A 2004-09-28 2005-09-27 Amplificateur d'antenne de vehicule comportant des moyens de protection contre les decharges electrostatiques dans l'entree Ceased EP1794838A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004046978 2004-09-28
DE102005039505 2005-08-20
PCT/EP2005/010422 WO2006034838A1 (fr) 2004-09-28 2005-09-27 Amplificateur d'antenne de vehicule comportant des moyens de protection contre les decharges electrostatiques dans l'entree

Publications (1)

Publication Number Publication Date
EP1794838A1 true EP1794838A1 (fr) 2007-06-13

Family

ID=35429483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05792665A Ceased EP1794838A1 (fr) 2004-09-28 2005-09-27 Amplificateur d'antenne de vehicule comportant des moyens de protection contre les decharges electrostatiques dans l'entree

Country Status (2)

Country Link
EP (1) EP1794838A1 (fr)
WO (1) WO2006034838A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101312353A (zh) * 2007-05-22 2008-11-26 宏达国际电子股份有限公司 具有静电防护的射频装置
DE102008050743B4 (de) 2008-10-08 2016-11-17 Qualcomm Technologies, Inc. (N.D.Ges.D. Staates Delaware) Impedanzanpass-Schaltung zur Anpassung von Planarantennen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037308A1 (fr) * 1999-03-18 2000-09-20 Telefonaktiebolaget Lm Ericsson Filtre électrique pour filtrer fréquences baisses
US7057472B2 (en) * 2001-08-10 2006-06-06 Hitachi Metals, Ltd. Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them
JP2005505188A (ja) * 2001-09-28 2005-02-17 エプコス　アクチエンゲゼルシャフト 回路装置、該回路装置を有するスイッチングモジュール、および該スイッチングモジュールの使用方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2006034838A1 *

Also Published As

Publication number Publication date
WO2006034838A1 (fr) 2006-04-06

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