JPH07122924A - Car antenna window with am antenna - Google Patents

Abstract

PURPOSE: To provide an automobile antenna window with an AM antenna usable when an antenna window is narrow. CONSTITUTION: This window is composed of a reception antenna window 1, a connection device 2 and an adaptive circuit 3 between them, the adaptive circuit 3 forms resonance systems RS1 and RS2 along with at least two inductances L1 and L2 and one L1 of the inductances is bridged to a high frequency line 4 by a capacitor C1. In a relatively long wave band, the AM antenna resonates with the two inductances L1 and L2 as a first resonance system RS1. In a shorter wave band, the capacitor C1 is bridged with the first inductance L1 and the antenna resonates with the second inductance L2 as a second resonance system RS2.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a receiving antenna type A
A vehicle antenna window having an M antenna and a device coupled to connect it to a receiver, wherein an adaptive circuit is provided between the AM antenna and a device for connecting to the receiver. The AM antenna is an antenna for receiving amplitude-modulated electromagnetic waves, and particularly for long, medium and short wavelengths. Besides, an FM antenna provided for receiving frequency-modulated electromagnetic waves (VHF band) is separately submitted. The adaptive circuit enhances the strength of the AM antenna at various reception frequencies provided in passenger cars.

[0002]

BACKGROUND OF THE INVENTION Known automobile antenna windows are similar to heating panels that cover the field of view, as well as European patents (0346038A).
As described in 1), the heating panel is also used as an antenna and is coupled to the receiver for the purpose of enhancing the AM antenna power, which is a special inductance method. In this case, however, only the medium wave band is used. This is expensive and also causes a brownout to the heating panel. Therefore, the combination of AM antenna system and heating panel is excluded from the scope of the present invention.

[0003]

In the present invention, for example, since the heating panel occupies a large area, the location of the antenna window for the AM antenna conductor is small, or the antenna window glass has a relatively small area (side window, floor window). Etc.) is especially applied to the case.

In such a case, when it should be used over the entire AM band, a special method is first required to enhance the reception antenna power, and the present invention aims at this method.

[0005]

SUMMARY OF THE INVENTION To solve this problem, according to the invention, an adaptation is installed between a car antenna window in the form of a receiving antenna and a coupling device for coupling to a receiver and an AM antenna and a receiver coupling device. The subject is a circuit.
The adaptive circuit is integrated with the high frequency conductor from the antenna to the receiver coupling device, and at least one conductor attached to it is grounded to the ground to form a first resonant system with at least two inductances, One of them is bridged to the high frequency line by a condenser. The arrangement is such that the AM antenna resonates with two inductances as a first resonance system in the first frequency band of relatively long waves, the capacitor bridges with the first inductance in the second frequency band of shorter waves, and the antenna resonates with the second resonance. The system resonates with the second inductance. This is, so to speak, the basic structural principle of an automatic antenna window according to the invention of two frequency bands or wavelength bands. It is known that capacitance acts together in a resonance system. It is possible to deal with individual components, for example antenna capacitance and / or spreading capacitance. This basic principle can change.

Advantageous variants for increasing the number of frequency bands or wavelength bands are mentioned in claims 2 and 3. At normal radio frequencies, the first resonance system is for long waves and the second is for medium waves.
A third resonance system and a short resonance third resonance system are prepared. This approach is a placement method that those skilled in the art perform mechanically without accounting for the invention. In each case there is the possibility of providing an ohmic resistant first and / or second and / or third and / or fourth resonant system. The resistor acts to neutralize resonance and expand frequency. A device can be provided that attaches a high ohm resistance, low capacitance amplifier to the receiver. However, if the coupling device of the receiver is integrated with a cable of sufficiently low capacitance, there is a possibility that the amplifier will be omitted.

Surprisingly, the automotive antenna window for an AM antenna according to the present invention can accommodate a variety of factors and needs.
In particular, the invention allows the AM antenna conductors to be accommodated in a relatively small area without reducing the reception power.
The AM antenna can then be integrated with, for example, 2 to 4 parallel conductors and placed on a large area heating panel. AM antennas even combine with only one or two conductors close to the edge, so that they can be accommodated in a few places in the field of view. Further, the antenna can be arranged as an L-type AM / FM. In this case, a known auxiliary circuit method is required to guarantee the signal separation of AM and FM. Of course, the fifth, sixth, and further resonance systems can be coupled by the method described above in order to further broaden the frequency band or the wavelength band within the scope of the present invention.

The invention eliminates the need for integration of heating panels in the AM antenna system. Nevertheless, high antenna power levels are achieved. In summary, the advantage gained should be found in the fact that according to the invention an enhancement of the antenna power is achieved for different frequencies if different coexisting resonant circuits are used.

Within the scope of the present invention, in particular, the long wave band can be arranged at the bottom, the medium wave band at the top end and the short wave band at the 49 m band, and the antenna power up to 20 dB can be achieved. An acceptable improvement is also made by the present invention in the mid-wave region itself, where the improvement in receive power is minimal. Shortwave and /
Or, if the long-wave band is stopped, the cost is reduced as will be understood by comparing and considering the contents of claims 1 to 3. As a result, the present invention makes it possible to implement an automobile antenna window in the entire practical requirement range at low cost.

The present invention will be described below with reference to the accompanying drawings with respect to only one embodiment.

[0011]

The drawing shows a circuit diagram of an automobile antenna window equipped with a suitable device according to the invention.

Reference numeral 1 (on the left) is an antenna window with a heating panel according to the present invention.
There are M antenna elements. 2 (right side) is an auxiliary device for connecting the receiver. The application circuit of 3 is inserted between the AM antenna of 1 and the receiver coupling device of 2.

The adaptation circuit 3 is integrated with the high-frequency conductor 4 from the antenna to the receiving and connecting device, and in the exemplary embodiment two grounded inductances (L1,
L2).

The resonance system RS1 is formed integrally with the conductor 5. One of the two inductances, that is, L1 is bridged to the high frequency line 4 by a capacitor (C1). The arrangement is such that in the relatively long wave first frequency band, the AM antenna functions as the first resonance system (RS1) and the inductance (L
1, L2). In the shorter second frequency band, the capacitor (C1) bridges with the inductance (L1) in a certain way, and the AM antenna resonates with the inductance (L2) as the second resonance system (RS2). In addition to the above, a facility having an inductance (L3) and a capacitor (C3) as a third resonance system (RS3) is provided to connect the receivers with 2. In the present embodiment, a fourth resonance system (RS4) having an inductance (L4) is also possible. In this case, the arrangement is such that the fourth resonance system (RS4) resonates with the frequency of the fourth higher frequency band.

Within the scope of the present invention, the resonance system from RS1 to RS4 can be selected very arbitrarily in terms of resonance, and thus frequency band or wavelength band, and can be selected in any exact adaptation to the actual requirements. It can be easily carried out by appropriate calculations or experimental studies. In principle, the first resonance system is provided for long waves, the second and third resonance systems (R2, R3) are provided for medium waves, and the fourth resonance system (RS4) is provided for short waves.

The receiver coupling device according to 2 (right side) may be integrated with an amplifier of high resistance and low capacitance. Of course, it can also be operated with a low capacitance cable without an amplifier. AM
The antenna may be integrated with 2 to 4 parallel conductors, or it may be integrated with only one conductor. In all cases, vehicle antenna windows with suitable equipment operate with high antenna capacity. The antenna is also L-type AM /
It can also be arranged as an FM antenna.

[Brief description of drawings]

1 is a circuit diagram of a motor vehicle antenna window equipped with a suitable device according to the invention.

[Explanation of symbols]

1 (left side) Antenna window with heating panel according to the present invention. There is another AM antenna element of the receiving antenna type. 2 (Right side) Ancillary device for receiver connection. 3 (Circuit) Adaptive circuit between 1 AM antenna and 2 receiver coupling device 4 Conductor 5 Conductor C1 Capacitor C3 Capacitor L1 Inductance L2 Inductance L3 Inductance L4 Inductor R1 Resistor R2 Resistor R3 Resistor R4 Resistor RS1 First resonance system RS2 No. Two resonance system RS3 Third resonance system

[Procedure amendment]

[Submission date] April 5, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Automotive antenna window with AM antenna

[Claims]

Detailed Description of the Invention

[0001]

The present invention relates to a receiving antenna type A
A vehicle antenna window having an M antenna and a device coupled to connect it to a receiver, wherein an adaptive circuit is provided between the AM antenna and a device for connecting to the receiver. The AM antenna is an antenna for receiving amplitude-modulated electromagnetic waves, and particularly for long, medium and short wavelengths. Besides, an FM antenna provided for receiving frequency-modulated electromagnetic waves (VHF band) is separately submitted. The adaptive circuit enhances the strength of the AM antenna at various reception frequencies provided in passenger cars.

[0002]

BACKGROUND OF THE INVENTION Known automobile antenna windows are similar to heating panels that cover the field of view, as well as European patents (0346038A).
As described in 1), the heating panel is also used as an antenna and is coupled to the receiver for the purpose of enhancing the AM antenna power, which is a special inductance method. In this case, however, only the medium wave band is used. This is expensive and also causes a brownout to the heating panel. Therefore, the combination of AM antenna system and heating panel is excluded from the scope of the present invention.

[0003]

In the present invention, for example, since the heating panel occupies a large area, the location of the antenna window for the AM antenna conductor is small, or the antenna window glass has a relatively small area (side window, floor window). Etc.) is especially applied to the case.

In such a case, when it should be used over the entire AM band, a special method is first required to enhance the reception antenna power, and the present invention aims at this method.

[0005]

SUMMARY OF THE INVENTION To solve this problem, according to the invention, an adaptation is installed between a car antenna window in the form of a receiving antenna and a coupling device for coupling to a receiver and an AM antenna and a receiver coupling device. The subject is a circuit.
The adaptive circuit is integrated with the high frequency conductor from the antenna to the receiver coupling device, and at least one conductor attached to it is grounded to the ground to form a first resonant system with at least two inductances, One of them is bridged to the high frequency line by a condenser. The arrangement is such that the AM antenna resonates with two inductances as a first resonance system in the first frequency band of relatively long waves, the capacitor bridges with the first inductance in the second frequency band of shorter waves, and the antenna resonates with the second resonance. The system resonates with the second inductance. This is, so to speak, the basic structural principle of an automatic antenna window according to the invention of two frequency bands or wavelength bands. It is known that capacitance acts together in a resonance system. It is possible to deal with individual components, for example antenna capacitance and / or spreading capacitance. This basic principle can change.

Advantageous variants for increasing the number of frequency bands or wavelength bands are mentioned in claims 2 and 3. At normal radio frequencies, the first resonance system is for long waves and the second is for medium waves.
A third resonance system and a short resonance third resonance system are prepared. This approach is a placement method that those skilled in the art perform mechanically without accounting for the invention. In each case there is the possibility of providing an ohmic resistant first and / or second and / or third and / or fourth resonant system. The resistor acts to neutralize resonance and expand frequency. A device can be provided that attaches a high ohm resistance, low capacitance amplifier to the receiver. However, if the coupling device of the receiver is integrated with a cable of sufficiently low capacitance, there is a possibility that the amplifier will be omitted.

Surprisingly, the automotive antenna window for an AM antenna according to the present invention can accommodate a variety of factors and needs.
In particular, the invention allows the AM antenna conductors to be accommodated in a relatively small area without reducing the reception power.
The AM antenna can then be integrated with, for example, 2 to 4 parallel conductors and placed on a large area heating panel. AM antennas even combine with only one or two conductors close to the edge, so that they can be accommodated in a few places in the field of view. Further, the antenna can be arranged as an L-type AM / FM. In this case, a known auxiliary circuit method is required to guarantee the signal separation of AM and FM. Of course, the fifth, sixth, and further resonance systems can be coupled by the method described above in order to further broaden the frequency band or the wavelength band within the scope of the present invention.

The invention eliminates the need for integration of heating panels in the AM antenna system. Nevertheless, high antenna power levels are achieved. In summary, the advantage gained should be found in the fact that according to the invention an enhancement of the antenna power is achieved for different frequencies if different coexisting resonant circuits are used.

Within the scope of the present invention, in particular, the long wave band can be arranged at the bottom, the medium wave band at the top end and the short wave band at the 49 m band, and the antenna power up to 20 dB can be achieved. An acceptable improvement is also made by the present invention in the mid-wave region itself, where the improvement in receive power is minimal. Shortwave and /
Or, if the long-wave band is stopped, the cost is reduced as will be understood by comparing and considering the contents of claims 1 to 3. As a result, the present invention makes it possible to implement an automobile antenna window in the entire practical requirement range at low cost.

The present invention will be described below with reference to the accompanying drawings with respect to only one embodiment.

[0011]

The drawing shows a circuit diagram of an automobile antenna window equipped with a suitable device according to the invention.

Reference numeral 1 (on the left) is an antenna window with a heating panel according to the present invention.
There are M antenna elements. 2 (right side) is an auxiliary device for connecting the receiver. The application circuit of 3 is inserted between the AM antenna of 1 and the receiver coupling device of 2.

The adaptation circuit 3 is integrated with the high-frequency conductor 4 from the antenna to the receiving and connecting device, and in the exemplary embodiment two grounded inductances (L1,
L2) is integrated with the lead wire 5 to form a resonance system RS1. One of the two inductances, that is, L1 is bridged to the high frequency line 4 by a capacitor (C1). The arrangement is such that in the relatively long wave first frequency band, the AM antenna functions as the first resonance system (RS1) and the inductance (L
1, L2). In the shorter second frequency band, the capacitor (C1) bridges with the inductance (L1) in a certain way, and the AM antenna resonates with the inductance (L2) as the second resonance system (RS2). In addition to the above, a facility having an inductance (L3) and a capacitor (C3) as a third resonance system (RS3) is provided to connect the receivers with 2. In the present embodiment, a fourth resonance system (RS4) having an inductance (L4) is also possible. In this case, the arrangement is such that the fourth resonance system (RS4) resonates with the frequency of the fourth higher frequency band.

Within the scope of the present invention, the resonant system from RS1 to RS4 can be selected very arbitrarily in terms of resonance, and hence frequency band or wavelength band, and can also be selected in an exact adaptation to the actual requirements. It can be easily carried out by appropriate calculations or experimental studies. In principle, the first resonance system is provided for long waves, the second and third resonance systems (R2, R3) are provided for medium waves, and the fourth resonance system (RS4) is provided for short waves.

The receiver coupling device according to 2 (right side) may be integrated with a high resistance and low capacitance amplifier. Of course, it can also be operated with a low capacitance cable without an amplifier. AM
The antenna may be integrated with 2 to 4 parallel conductors, or it may be integrated with only one conductor. In all cases, vehicle antenna windows with suitable equipment operate with high antenna capacity. The antenna is also L-type AM /
It can also be arranged as an FM antenna.

[Brief description of drawings]

1 is a circuit diagram of a motor vehicle antenna window equipped with a suitable device according to the invention.

[Description of Reference Signs] 1 (left side) Antenna window with heating panel according to the present invention. There is another AM antenna element of the receiving antenna type. 2 (Right side) Receiver connection auxiliary device 3 (Circuit) Adaptive circuit between 1 AM antenna and 2 receiver connection device 4 Conductor 5 Conductor C1 Capacitor C3 Capacitor L1 Inductance L2 Inductance L3 Inductance L4 Inductor R1 Resistor R2 Resistor R3 Resistor R4 Resistor RS1 First resonance system RS2 Second resonance system RS3 Third resonance system RS4 Fourth resonance system

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Peter, Pauls Germany, 48167, Münster, Stahlweg, 62

Claims (9)

[Claims] 1. A car antenna window having an AM antenna of the receiving antenna type with a device connected to a receiver, wherein an adaptive circuit is arranged between the AM antenna and the receiver connecting device. And is integrated with the high frequency conductor (4) from the AM antenna to the receiver coupling device and is coupled to at least one conductor (5) grounded to the ground, one of which (L1) has a capacitor (C1) At least two inductances (L1, L
The first resonance system (RS1) having 2) is formed, and the AM antenna is arranged so as to resonate with the inductances (L1, L2) as the first resonance system (RS1) in the relatively long-wave first frequency band. In addition, the capacitor (C1) bridges the inductance (L1) in the second frequency band of a shorter wave, and the AM antenna is arranged so as to resonate with the inductance (L2) as the second resonance system (RS2). Characteristic car antenna window. 2. A passenger car antenna window having an AM antenna in the form of a receiving antenna with a device connected to a receiver, wherein an adaptive circuit is arranged between the AM antenna and the receiver connection device. A) integrated with the high frequency conductor (4) from the AM antenna to the receiver coupling device and connected to at least one conductor (5) grounded to the ground, one of which (L1) has a capacitor (C1) ) Forms a resonant system (RS1) having at least two inductances (L1, L2) that are bridged, and b) further in the direction of the receiver coupling device the inductance (L1).
3) and the resonance system (RS3) having a capacitor (C3) as necessary, the AM antenna resonates with the inductances (L1, L2) as the first resonance system (RS1) in a relatively long-wave first frequency band. The capacitor (C1) bridges the inductance (L1) in the second frequency band of a shorter wave, and the AM antenna is arranged so as to resonate with the inductance (L2) as the second resonance system (RS2). In addition, in the third frequency band higher than the second, the antenna is arranged so as to resonate with the inductance (L3) and optionally the capacitor (C3) as a third resonance system (RS3). window. 3. A passenger car antenna window having an AM antenna in the form of a receiving antenna with a device connected to a receiver, wherein an adaptive circuit is arranged between the AM antenna and the receiver connection device. A) integrated with the high frequency conductor (4) from the AM antenna to the receiver coupling device and connected to at least one conductor (5) grounded to the ground, one of which (L1) has a capacitor (C1) ) Forms a resonant system (RS1) having at least two inductances (L1, L2) that are bridged, and b) further in the direction of the receiver coupling device the inductance (L1).
3) and a resonance system having a capacitor (C3) if necessary, and c) a resonance system having an inductance (L4), and the AM antenna has a first resonance system in a relatively long first frequency band ( RS1) is arranged so as to resonate with the inductances (L1, L2), the capacitor (C1) bridges with the inductance (L1) in the second frequency band of a shorter wave, and the AM antenna serves as the second resonance system (RS2). The antenna is arranged to resonate with the inductance (L2), and additionally, in the third frequency band higher than the second, the antenna is arranged to resonate with the inductance (L3) and the capacitor (C3) as the third resonance system (RS3). In addition, the fourth resonance system (RS4) resonates with the inductance (L4) at a frequency higher than that of the third resonance system (RS3). Automobile antenna window, characterized in that it is arranged to so that. 4. A first resonance system (RS1) for long waves, a second resonance system (RS2) and optionally a third resonance system (RS3).
The vehicle antenna window according to any one of claims 1 to 3, wherein is installed for medium waves, and if necessary, the fourth resonance system (RS4) is installed for short waves. 5. First and / or second and / or third and / or fourth resonance system (RS1, RS2, RS3, RS4)
Resists resonance (R1, R2, R
The vehicle antenna window according to claim 4, which is integrated with (3, R4). 6. Vehicle antenna window according to claim 1, characterized in that the receiver coupling device (2) is integrated with an amplifier of high resistance and low capacitance. 7. The vehicle antenna window according to claim 1, wherein the receiver coupling device (FIG. 2) is integrated with the low capacitance cable and arranged without an amplifier. 8. The automobile antenna window according to claim 1, wherein the AM antenna is integrated with one to four parallel conductors and is installed on the heating panel. 9. The vehicle antenna window according to claim 1, wherein the AM antenna is designed as an L-type AM / FM antenna.