EP1177596B1 - Scheibenantennenanordnung für fahrzeug und funkempfänger mit einer derartigen anordnung - Google Patents

Scheibenantennenanordnung für fahrzeug und funkempfänger mit einer derartigen anordnung Download PDF

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Publication number
EP1177596B1
EP1177596B1 EP00922904A EP00922904A EP1177596B1 EP 1177596 B1 EP1177596 B1 EP 1177596B1 EP 00922904 A EP00922904 A EP 00922904A EP 00922904 A EP00922904 A EP 00922904A EP 1177596 B1 EP1177596 B1 EP 1177596B1
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EP
European Patent Office
Prior art keywords
antenna
window glass
heater unit
antenna device
defogging heater
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.)
Expired - Lifetime
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EP00922904A
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English (en)
French (fr)
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EP1177596A1 (de
Inventor
Hitoshi Nippon Sheet Glass Co. LTD KAKIZAWA
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Nippon Sheet Glass Co Ltd
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Nippon Sheet Glass Co Ltd
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Publication of EP1177596A1 publication Critical patent/EP1177596A1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Definitions

  • the present invention relates to glass antenna devices for use on motor vehicles and radio receiver apparatus using such glass antenna devices.
  • glass antenna devices which comprise antenna conductor elements formed on a window glass of a motor vehicle, are being used more popularly than the traditional rod antennas primarily due to the facts that the glass antenna devices are esthetically superior because they not protrude outside the motor vehicle, they are very unlikely to be damaged, and they do not produce air-cutting sounds.
  • the glass antenna device is installed on a vehicle's rear window glass where a defogging heater unit is provided; thus, the antenna conductor elements must be provided on a limited area of the rear window glass, so as not to overlap the defogging heater unit.
  • the glass antenna device is to be provided for radio communications using the AM, FM, TV, cellular telephone frequency bands, etc., designing and adjusting the glass antenna device tend to be cumbersome and time-consuming work.
  • the antennal pattern would become very complicated in structure (see, for example, Japanese Utility Model Publication No. HEI-1-59309). It has been conventional to adjust such a complicated antenna pattern on a trial-and-error basis, which also tends to be time-consuming work.
  • the receiving sensitivity in the AM band is generally proportional to the area occupied by the AM antenna pattern on the vehicle window glass, it is important to reserve a large area for the antenna pattern on the window glass if high receiving sensitivity is to be obtained.
  • the defogging heater unit it has been proposed to arrange the defogging heater unit to also function as an AM antenna on the vehicle rear window; however, using the defogging heater unit directly as the AM antenna would produce a problem of unwanted noise and thus can not suit practical use.
  • some of the known vehicle glass antenna devices employ, in between a power source and the defogging heater unit, a choke coil capable of bearing great electric currents so that the heater unit can be used also as an AM antenna, as typically disclosed in Japanese Patent Laid-Open Publication No. SHO-56-42401.
  • a dual-purpose glass antenna device capable of receiving both AM signals and FM signals using the above-mentioned arrangements (e.g., Japanese Patent Laid-Open Publication No. SHO-57-188102)
  • Japanese Utility Model Publication No. SHO-59-3604 discloses such a sophisticated vehicle glass antenna device.
  • the disclosed vehicle glass antenna device 101 is installed on a vehicle rear window glass 102 and includes an AM antenna 104 provided above a defogging heater unit or defogger 103.
  • the defogger 103 is arranged to also function as an FM antenna 105, and the AM antenna 104 and FM antenna 105 are connected to a radio receiver apparatus (not shown) via respective amplifiers 108 and 109.
  • the defogger 103 and a power feeding point 105b are connected in series with each other via a lead 120.
  • the british patent application GB-2316538 describes a vehicle windscreen FM/AM antenna using choke coils at the heater element to allow receiving both AM and FM bands.
  • No choke Coils configuration may be used only for particular frequencies or for VHF (FM) receiving only.
  • the No. SHO-59-3604 publication has a description which reads "the above-mentioned defogger is connected to a lead of a suitable length such that an impedance matching is effected to allow the defogger to work as an FM antenna section".
  • No subsidiary FM antenna is provided in the vehicle glass antenna device according to the No. SHO-59-3604 publication.
  • U.S. Patent No. 4,791,426 discloses an antenna device provided on a rear window glass of a motor vehicle.
  • the disclosed antenna device 201 includes an antenna 204 for reception of long-wave, medium-wave and shortwave signals, and a plurality of defogging heater elements 203 capable of also functioning as an antenna 205 for reception of ultra-short-wave signals.
  • the signals received via the antennas 204 and 205 are coupled via respective amplifiers 208 and 209 to a radio receiver apparatus (not shown).
  • reference numeral 210 represents a frequency separator.
  • Japanese Patent Laid-open Publication No. SHO-53-97353 teaches an antenna device where a field effect transistor is connected to a glass antenna and used as a preamplifier to minimize spurious reception.
  • the defogger is used also as the FM antenna, which, however, is not practical because power is supplied to the defogger directly from the power feeding point 205b and thus a sufficient FM receiving sensitivity can not be attained.
  • the defogger is used as the FM antenna 105 without such a choke coil provided between the defogger and the power source. Unlike in the AM frequency band, the defogger may be allowed to operate properly in the FM frequency band without the provision of the choke coil. However, because the defogger and power feeding point 105b are connected directly by the lead 120, there would arise the problem that a sufficient FM receiving sensitivity can not be attained. Thus, currently, the antenna device as disclosed in Japanese Utility Model Publication No. SHO-59-3604 has not yet been put to actual use. In addition, as shown in Fig. 11, the lead 120 has a length greater than one half of the width of the window glass.
  • a first object of the present invention to provide a vehicle window glass antenna device which is cable of receiving AM and FM waves with high sensitivity without using a choke coil.
  • a vehicle window glass antenna device comprising: a defogging heater unit provided on a window glass of a vehicle, the defogging heater unit being of the type having no choke coil; an AM antenna provided above the defogging heater unit for receiving a signal of an AM frequency band, the AM antenna comprising a plurality of horizontal antenna conductor elements each having a length in a range of 800 mm to 1300 mm; an FM antenna provided between the defogging heater unit and the AM antenna for receiving a signal of an FM frequency band, the FM antenna comprising a single horizontal antenna conductor element having a length in a range of 300 mm to 500 mm; AM amplifier means for amplifying the signal received via the AM antenna; and FM amplifier means for amplifying the signal received via the FM antenna.
  • the vehicle window glass antenna device of the present invention may further comprise a separate subsidiary FM antenna provided below the defogging heater unit.
  • the subsidiary FM antenna constitutes a diversity antenna with the above-mentioned FM antenna provided between the defogging heater unit and the AM antenna functioning as a main antenna.
  • the AM antenna may also include a short-circuiting line interconnecting the plurality of horizontal antenna conductor elements.
  • the defogging heater unit may comprise a plurality of heater lines and a short-circuiting line interconnecting these heater lines.
  • the AM amplifier comprise an electric circuit including a common-source FET (Field Effect Transistor) and have an input impedance of at least 1 M ⁇ .
  • the AM amplifier may include a choke coil provided at its output stage and have an output impedance of 100 ⁇ or less.
  • the FM amplifier comprises an electric circuit including a grounded-base transistor or grounded-gate FET. preferably, the FM amplifier has an input impedance of 50 ⁇ or less. Further, the FM amplifier preferably has a gain of 3 dB or less.
  • the FM amplifier may include, at its output stage, a filter in the form of a tank circuit which acts to prevent generation of a mutually-modulated signal of the AM frequency band through a mutual modulation between a plurality of output FM signals from the FM amplifier.
  • a radio receiver apparatus for a vehicle which comprises: a defogging heater unit provided on a window glass of a vehicle; an AM antenna provided above the defogging heater unit for receiving a signal of an AM frequency band; an FM antenna provided between the defogging heater unit and the AM antenna for receiving a signal of an FM frequency band, the FM antenna comprising a single horizontal antenna conductor element; an AM amplifier for amplifying the signal received via the AM antenna; an FM amplifier for amplifying the signal received via the FM antenna; and a radio receiver connected with respective output terminals of the AM amplifier and FM amplifier via a signal-transmitting cable having a diameter of 3 mm or less.
  • each of the AM and FM antennas is designed as a dedicated simple antenna pattern so that basic designing and adjustment of the AM and FM antennas can be substantially facilitated.
  • the impedance of the AM antenna is very effective in enhancing the receiving sensitivity of the AM antenna.
  • the AM antenna comprise a plurality of horizontal antenna conductor elements connected together to constitute a fork-shaped AM antenna pattern.
  • the AM antenna may comprise a plurality of antenna conductor elements connected to form a loop-shaped AM antenna pattern.
  • the fork-shaped or loop-shaped AM antenna pattern include a short-circuiting line extending centrally across the antenna pattern.
  • the AM antenna pattern it is preferable that the AM antenna pattern have as large an area as possible, as noted earlier. Flexibility in choosing a vertical dimension of the AM antenna pattern is limited inevitably by factors such as the size of the vehicle window glass, region where the defogging heater unit is installed and necessary spacings between the AM antenna, FM antenna and defogging heater unit. Thus, to maximize the area of the AM antenna pattern as desired, the horizontal dimension or length of the antenna pattern has to be increased.
  • the FM antenna is constructed as follows.
  • the FM frequency band is 76 - 90 MHZ in Japan and 88 - 108 MHZ in North America, and the designed wavelength is selected from among such FM frequency bands.
  • an antenna pattern is provided on a dielectric substance in the form of a glass sheet.
  • the dielectric effect produced by the glass sheet allows the antenna pattern to work effectively even when the pattern length is shorter than a given length calculated on the basis of the wavelength ⁇ .
  • the FM amplifier comprises a semiconductor element such as a transistor or FET, resistor, coil and capacitor, so as to amplify a received signal of the FM frequency band and match input and output impedances of the amplifier. It is preferred that the FM amplifier have low noise in order to increase its S/N ratio. Further, in order to properly receive an input signal of great electric field intensity, it is also preferred that the FM amplifier comprise a grounded-gate circuit using a low-noise FET and be set to a gain of 3 dB (i.e., an amplification rate of one) or less. Preferably, the FM amplifier has an input impedance of 50 ⁇ or less.
  • the inventive glass antenna device is characterized in that it includes dedicated FM and AM antennas and dedicated amplifiers are provided respectively for the FM and AM antennas; thus, the inventive glass antenna device can receive both FM-wave signals and AM-wave signals with superior sensitivity.
  • the AM and FM amplifiers can be set to sufficiently low output impedances, which allows the antenna device to be connected to the radio receiver apparatus using a signal-transmitting cable having a diameter of just 3 mm or less.
  • a signal-transmitting cable typically, a coaxial cable
  • Such a signal-transmitting cable having a diameter of 3 mm or less is very pliable and can be handled with utmost ease, so that the coaxial cable can be readily laid in place on the vehicle.
  • the defogging heater unit 3 in this embodiment is connected directly to the heater power source 6 via the feeding patterns 3c and 3d. In this way, the defogging heater unit 3 can present a low impedance to an AM wave and is prevented from functioning as an AM antenna.
  • the AM antenna 4 is constructed of five horizontal AM antenna conductor elements each having a length L AM of 1,000 mm and spaced from each other by about 20 mm.
  • TABLE 1 shows measurements of the receiving sensitivity of the FM antenna in relation to EXAMPLE 1 where each of the AM antenna conductor elements is set to the 1,000 mm length L AM and EXAMPLE 2 where each of the AM antenna conductor elements is set to a maximum length.
  • a separate subsidiary FM antenna may be provided as necessary (see Fig. 3); for example, such a subsidiary FM antenna 5s may be provided in a marginal region below the defogging heater unit 3.
  • the FM antenna 5 may be constructed as a main antenna and the subsidiary FM antenna 5s may be constructed as a diversity antenna.
  • the AM amplifier 8 has a high input impedance and low output impedance and amplifies the received AM signal V A to supply the amplified output AM signal V AO to the radio receiver apparatus 10.
  • Fig. 4 is a circuit diagram illustrating an embodiment of the AM amplifier employed in the present invention.
  • the choke transformer L1 includes a tap positioned at a point thereof corresponding to a 2:1 turns ratio and an output from the amplifier is extracted via this tap, so that the extracted output assumes one quarter of the composite impedance.
  • a high-frequency transformer is preferably provided at the output stage of the AM amplifier 8, so as to cause the output impedance to be 1,000 ⁇ or less.
  • the received AM signal V A input to the gate G is multiplied by a voltage amplification coefficient (gm) of the FET Q1 and load impedance (i.e., the composite impedance of the load resistor R2 and the choke transformer L1 connected in parallel with the resistor R2), and the output from the drain D of the FET Q1 corresponds in value to a product of "gm ⁇ V A ⁇ load impedance". Consequently, the output AM signal V AO corresponds in value to one half of the product of "gm ⁇ V A ⁇ load impedance".
  • gm voltage amplification coefficient
  • the output impedance can be set to a low value even when the amplification gain is increased.
  • the output AM signal V AO can be taken out at a high level, and also an impedance matching can be made between a coaxial cable connecting to the radio receiver apparatus 10 and the output impedance.
  • the FM amplifier 9 is constructed as a grounded-gate amplifier circuit, which includes resistors R11, R13, an inductor L12, an FET Q2, a resistor R12, a capacitor C11 and a choke transformer L11.
  • the FM amplifier employed in the present invention can properly perform impedance conversion and signal amplification at an appropriate level without producing a waveform distortion in the output FM signal from the FM amplifier.
  • the FM amplifier employed in the present invention can reliably prevent the output of the mutually modulated signal and thus avoid a waveform distortion resulting from such a mutual modulation.
  • the FM amplifier 9 may be constructed as a grounded-base amplifier using an ordinary transistor in place of the FET.
  • the inventive glass antenna device may further include a synthesizer section 71 that synthesizes the output signals from the above-mentioned AM and FM amplifiers 8 and 9 as shown in Fig. 7.
  • Fig. 8 is a circuit diagram illustrating an example of the synthesizer section 71.
  • the synthesizer section 71 includes passive components such as capacitors and inductance elements.
  • the amplified output signal from each of the AM and FM amplifiers 8 and 9 is filtered so as not to flow back into the corresponding amplifier, and the thus-filtered signals are combined together or synthesized so that the synthesized result is supplied to the radio receiver apparatus 10 via the coaxial cable.
  • the synthesizer section 71 includes capacitors C31 and C32 and choke coils L31 and L32.
  • the synthesizer section 71 also has an AM signal input terminal connected to one end of the choke coil L32, which is connected at the other end to an output terminal of the synthesizer section 71.
  • the synthesizer section 71 also has an FM signal input terminal connected to one end of the capacitor C31, which is connected at the other end to the choke coil L31 and capacitor C32.
  • the other end of the choke coil L31 is grounded, and the other end of the capacitor C32 is connected to the output terminal of the synthesizer section 71.
  • the AM antenna 4 comprises a plurality of horizontal AM antenna conductor elements 4a that together constitute a fork-shaped AM antenna pattern.
  • the AM antenna 4 also includes a short-cutting line 42 extending centrally across the fork-shaped AM antenna pattern.
  • a horizontal bypass element 41 is disposed above the horizontal AM antenna pattern 4a. This horizontal bypass element 41 is additionally provided here because there is formed a relatively large marginal gap between the upper end of the horizontal AM antenna pattern 4a and an upper window frame portion of the vehicle when the rear window glass is actually fitted in the window frame, although such a large gap is not clearly visible in Fig. 9 that is a plan of the antenna patterns as viewed from the inside of the vehicle.
  • the AM antenna has been described above as comprising the fork-shaped AM antenna pattern, the present invention is not so limited; for example, the AM antenna may comprise a loop-shaped antenna pattern. In the case of such a loop-shaped antenna pattern, a short-circuiting line may be provided centrally across the antenna pattern.
  • Fig. 10 A shows one example of the FM antenna that is suitable for use in the case where the FM feeding point 5a is used as the power feeding point
  • Fig. 10 B shows another example of the FM antenna that is suitable for use in the case where the FM feeding pattern 5a is connected via the connecting lead.
  • the designed length of the FM antenna based on the basic design specifications is the same for both the Fig. 10A example and the Fig. 10B example
  • the FM antenna pattern 5 of Fig. 10B is constructed to be shorter than that of Fig. 10A by an amount corresponding to the length of the connecting lead. Note that even in the Fig. 10A example, the FM antenna 5 does not extend beyond the centerline of the window glass.
  • each of the AM and FM antennas comprises a dedicated simple antenna pattern; thus, basic designing of these antenna patterns can be made with facility.
  • a region on the read window glass where defogging is required and other regions where the glass antenna patterns may be provided are determined depending on the type of the vehicle body (such as the sedan, wagon or hatch-back type). More particularly, these regions will be determined taking into account particular design specifications, such as the size, mounting angle, etc. of the rear window glass and presence/absence of a trunk room. Thus, for a given vehicle type, the size of the window glass and the regions where the antenna patterns may be provided are determined, and then the inventive vehicle window glass antenna device is designed for application to such a window glass.
  • the inventive vehicle window glass antenna device can be applied appropriately to various types of motor vehicles, without changing its basic design, as long as the size and mounting areas of the window glass are similar between the vehicle types. Therefore, the necessary time for adjusting the design of the antenna device can be minimized by the present invention.
  • the inventive glass antenna device includes the dedicated FM antenna and AM antenna, each of which is constructed basically as a straight antenna pattern.
  • these antennas can be designed and adjusted with increased ease.
  • the FM amplifier employed in the present invention can properly perform impedance conversion and signal amplification at an appropriate level without producing an unwanted waveform distortion in the output FM signal from the FM amplifier, with the result that the FM signal can be reproduced with high quality.
  • the AM and FM amplifiers are set to sufficiently low output impedances, which allows the antenna device to be connected to the radio receiver apparatus using a signal-transmitting cable having a diameter of 3 mm or less that is quite easy to handle.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (13)

  1. Fahrzeugfensterscheiben-Antennenvorrichtung (1), umfassend:
    Antibeschlag-Heizeinheit (3), die an einer Fensterscheibe (2) eines Fahrzeugs vorgesehen ist;
    dadurch gekennzeichnet, dass
       die Antibeschlag-Heizeinheit einem Typ entspricht, der keine Drosselspule aufweist;
       eine AM-Antenne (4) oberhalb der Antibeschlag-Heizeinheit vorgesehen ist, um das AM-Frequenzband zu empfangen, wobei die AM-Antenne mehrere horizontale Antennenleiterelemente (4a) umfasst, die jeweils eine Länge im Bereich von 800 mm bis 1.300 mm aufweisen;
       eine FM-Antenne (5) zwischen der Antibeschlag-Heizeinheit und der AM-Antenne vorgesehen ist, um das FM-Frequenzband zu empfangen, wobei die FM-Antenne ein einzelnes horizontales Antennenleiterelement umfasst, das eine Länge im Bereich von 300 mm bis 500 mm aufweist;
       ein AM-Verstärkermittel (8) zum Verstärken des über die AM-Antenne empfangenen Signals vorgesehen ist; und
       ein FM-Verstärkermittel (9) zum Verstärken des über die FM-Antenne empfangenen Signals vorgesehen ist.
  2. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach Anspruch 1, bei der die Antibeschlag-Heizeinheit (3) mit der FM-Antenne (5) kapazitiv gekoppelt ist und als eine Hilfs-FM-Antenne dient.
  3. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach Anspruch 1, die ferner eine Hilfs-FM-Antenne (5s) umfasst, die unterhalb der Antibeschlag-Heizeinheit (3) vorgesehen ist, wobei die Hilfs-FM-Antenne mit der FM-Antenne (5), die zwischen der Antibeschlag-Heizeinheit und der als Hauptantenne dienenden AM-Antenne vorgesehen ist, eine Mehrbereichsantenne bildet.
  4. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach Anspruch 1, 2 oder 3, bei der die AM-Antenne (4) eine Kurzschlussleitung (42) enthält, die die mehreren horizontalen Antennenleiterelemente (4a) verbindet.
  5. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der die Antibeschlag-Heizeinheit (3) mehrere Heizleitungen und eine Kurzschlussleitung, die die Heizleitungen verbindet, enthält.
  6. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das AM-Verstärkermittel (8) eine elektrische Schaltung umfasst, die einen FET (Q1) mit gemeinsamer Source enthält und eine Eingangsimpedanz von wenigstens 1 MΩ aufweist.
  7. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das AM-Verstärkermittel (8) eine Drosselspule (L1) enthält, die an einer Ausgangsstufe desselben vorgesehen ist und eine Ausgangsimpedanz von 100 Ω oder weniger aufweist.
  8. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das FM-Verstärkermittel (9) eine elektrische Schaltung umfasst, die einen Transistor mit geerdeter Basis oder einen FET mit geerdetem Gate (Q2) enthält.
  9. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das FM-Verstärkermittel (9) eine Eingangsimpedanz von 50 Ω oder weniger aufweist.
  10. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das FM-Verstärkermittel (9) einen Gewinn von 3 dB oder weniger aufweist.
  11. Fahrzeugfensterscheiben-Antennenvorrichtung (1) nach irgendeinem der vorangehenden Ansprüche, bei der das FM-Verstärkermittel (9) an einer Ausgangsstufe desselben ein Filtermittel in Form eines Schwingkreises aufweist, das die Erzeugung eines wechselweise modulierten Signals eines AM-Frequenzbandes verhindert, die aus einer wechselweisen Modulation zwischen mehreren Ausgangs-FM-Signalen vom FM-Verstärkermittel resultiert.
  12. Funkempfängervorrichtung für ein Fahrzeug, umfassend:
    Antibeschlag-Heizeinheit (3), die an einer Fensterscheibe (2) eines Fahrzeugs vorgesehen ist;
    dadurch gekennzeichnet, dass
       die Antlbeschlag-Heizeinheit einem Typ entspricht, der keine Drosselspule aufweist;
       eine AM-Antenne (4) oberhalb der Antibeschlag-Heizeinheit vorgesehen ist, um das AM-Frequenzband zu empfangen;
       eine FM-Antenne (5) zwischen der Antibeschlag-Heizeinheit und der AM-Antenne vorgesehen ist, um das FM-Frequenzband zu empfangen, wobei die FM-Antenne ein einzelnes horizontales Antennenleiterelement umfasst;
       ein AM-Verstärkermittel (8) zum Verstärken des über die AM-Antenne empfangenen Signals vorgesehen ist;
       ein FM-Verstärkermittel (9) zum Verstärken des über die FM-Antenne empfangenen Signals vorgesehen ist; und
       ein Funkempfänger (10) vorgesehen ist, der mit dem jeweiligen Ausgangsanschlüssen des AM-Verstärkermittels (8) und des FM-Verstärkermittels (9) über ein Signalübertragungskabel mit einem Durchmesser von 3 mm oder weniger verbunden ist.
  13. Funkempfängervorrichtung nach Anspruch 12, bei der das Signalübertragungskabel eine Impedanz von 75 Ω oder weniger aufweist.
EP00922904A 1999-05-13 2000-04-28 Scheibenantennenanordnung für fahrzeug und funkempfänger mit einer derartigen anordnung Expired - Lifetime EP1177596B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP13307899 1999-05-13
JP13307899 1999-05-13
JP2000021398 2000-01-31
JP2000021398 2000-01-31
PCT/JP2000/002827 WO2000070708A1 (en) 1999-05-13 2000-04-28 Glass antenna device for vehicle and radio receiver apparatus using the same

Publications (2)

Publication Number Publication Date
EP1177596A1 EP1177596A1 (de) 2002-02-06
EP1177596B1 true EP1177596B1 (de) 2005-03-23

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EP (1) EP1177596B1 (de)
JP (1) JP4112807B2 (de)
AU (1) AU762198B2 (de)
CA (1) CA2373258C (de)
DE (1) DE60018917T2 (de)
WO (1) WO2000070708A1 (de)

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Publication number Priority date Publication date Assignee Title
WO2002056412A2 (en) 2001-01-04 2002-07-18 Nippon Sheet Glass Co., Ltd. Glass antenna and glass antenna system using the same
JP2004214820A (ja) 2002-12-27 2004-07-29 Honda Motor Co Ltd 車載アンテナ
FR2866155B1 (fr) * 2004-02-06 2006-05-05 Composants Electr Soc D Antenne serigraphiee pour lunette arriere de vehicule automobile de type berline.
JP2006033498A (ja) 2004-07-16 2006-02-02 Nippon Sheet Glass Co Ltd 車両用ガラスアンテナ装置
JP2006101386A (ja) * 2004-09-30 2006-04-13 Nippon Sheet Glass Co Ltd 車両用ガラスに形成されるデフォッガの熱線パターン構造および車両用ガラスアンテナ
JP4370303B2 (ja) * 2005-03-29 2009-11-25 セントラル硝子株式会社 車両用ガラスアンテナ
JP5355096B2 (ja) 2007-02-06 2013-11-27 日本板硝子株式会社 車両用ガラスアンテナ
JP5023956B2 (ja) 2007-10-15 2012-09-12 旭硝子株式会社 自動車用ガラスアンテナ
JP5141500B2 (ja) * 2008-08-29 2013-02-13 旭硝子株式会社 車両用ガラスアンテナ及び車両用窓ガラス
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JP2015106906A (ja) * 2013-12-03 2015-06-08 日本電信電話株式会社 無線受信装置
JP2017175290A (ja) * 2016-03-22 2017-09-28 旭硝子株式会社 バックドア、及びガラスアンテナ
CN115632222B (zh) * 2022-12-19 2023-03-10 零八一电子集团四川力源电子有限公司 一种天线融雪除冰系统

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CA2373258C (en) 2004-04-06
WO2000070708A1 (en) 2000-11-23
AU762198B2 (en) 2003-06-19
CA2373258A1 (en) 2000-11-23
DE60018917D1 (de) 2005-04-28
DE60018917T2 (de) 2006-03-30
JP2003500870A (ja) 2003-01-07
AU4315200A (en) 2000-12-05
EP1177596A1 (de) 2002-02-06
JP4112807B2 (ja) 2008-07-02

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