JP2000252732A - Glass antenna for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain excellent characteristics for the reception of the television broadcasting bands by arranging antenna patterns, which are long at specific rates of the wavelengths of the frequencies of the high-frequency band of the VHF television broadcasting, on rear window glass. SOLUTION: A defogger pattern is formed in an eight numeric character shape of parallel conductor lines which connect common electrodes 3 and 4 on a glass surface and parallel to a conductor 2. This defogger pattern is used as an antenna for receiving the AM radio band and antenna patterns having conductor lines which are a quarter as long as the wavelengths of signals of frequency nearby a high-frequency band of the VHF television broadcasting in the glass are arranged at specific positions of the defogger pattern. In the antenna patterns, antenna patterns are provided which have conductor lines a quarter as long as the wavelengths of signals of frequency from the FM radio broadcasting band to nearby a low-frequency band of the VHF television broadcasting in the glass are present to obtain the antenna which receives signals of the VHF and UHF television broadcasting bands from the FM radio broadcasting band.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna for an automobile which outputs a reception signal of an AM radio broadcasting band, an FM radio broadcasting band, and a television broadcasting band from an antenna of a conductor pattern on a rear window glass surface of an automobile. It is.

[0002]

2. Description of the Related Art FIG. 9 is a configuration diagram of a conventional glass antenna for a vehicle. 167 is a rear window glass of the automobile, 168
Is an antenna pattern of conductor lines, and 170 and 171 are defogger conductor lines. The defogger pattern is formed in a U-shape by a plurality of conductor lines parallel to the conductor lines 170 and 171 connecting the common electrodes 172, 173, and 174 at both end portions of the glass surface.

Reference numeral 175 denotes a choke coil. One of two terminals connected to a voltage stabilizing capacitor 176 is connected to the ground potential of the vehicle body via power lines 177 and 178 and the DC power supply potential V _DD via a switch 179, respectively. And a power supply line 18 connected to the other two terminals of the choke coil.
0 and 181 are connected to two common electrodes 174 and 173, respectively. The switch 179 is turned on to heat the defogger's plurality of conductor wires so that the glass does not fog at low temperatures or humidity, and is turned off when the weather is good and heating is not required.

Reference numeral 169 denotes a power supply terminal at the side end of the glass surface which is connected to the antenna pattern 168. The power supply terminal 169 connects the signal line 182 connected to the internal conductor at one end of the coaxial cable 184, and connects the external conductor to the ground line 183. Through to a nearby car body. The external conductor at the other end of the coaxial cable 184 is set to the ground potential GND, and the received signal X of the antenna is output from the internal conductor.

[0005] This conventional glass antenna for automobiles has A
It is for receiving the M radio broadcast band and the FM radio broadcast band, and has a single antenna, so that the characteristics are not sufficient for the reception of the TV broadcast band. Because automobiles take various directions with respect to the transmitted radio waves from the broadcasting station, if the reception sensitivity of the antenna has directivity, the TV image becomes unclear or changes in the direction of low sensitivity. .

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide an AM radio broadcasting band and an FM radio broadcasting band having a configuration not known before. Another object of the present invention is to provide an automotive glass antenna that outputs a reception signal of a television broadcast band.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a plurality of parallel conductors provided on a rear window glass of an automobile and connecting common electrodes at both ends. A defogger pattern consisting of lines, and an antenna pattern provided at the upper central portion, lower central portion, upper right portion or upper left portion of the defogger pattern. A conductor line having a length of 1/4 of the wavelength in the glass of a signal having a frequency near the band and a conductor line having a length of 1/4 of the wavelength in the glass of a signal having a frequency near the high frequency band of VHF television broadcasting. And an antenna pattern provided on the upper central part, lower central part, upper right part or upper left part of the defogger pattern. There is provided a glass antenna device for an automobile, characterized in that it comprises an antenna pattern having a quarter of the length of the conductor wires of a wavelength in the glass of the frequency of the signal in the vicinity high frequency band of the broadcast.

[0008]

According to the present invention, an defogger pattern is used as an antenna for receiving an AM radio broadcast band, and an antenna pattern having a conductor line having a length of 1/4 of a wavelength in glass of a signal having a frequency near a high frequency band of VHF television broadcast. Are arranged at the upper and lower central portions of the defogger pattern and at the upper right and left side portions. In the plurality of antenna patterns, １ ／ of the wavelength in the glass of a signal having a frequency near the low frequency band of the FM radio broadcast band to the VHF television broadcast is further included.
There is an antenna pattern having a conductor wire of length
The antenna is used to receive VHF and UHF television broadcasting bands from the M radio broadcasting band.

[0009] By using a plurality of antenna patterns different in spatial arrangement from the antenna, the FM radio broadcast band receives two channels and the television broadcast band diversifies and receives the signals on a plurality of channels. Compensation results in an antenna with good reception sensitivity in any direction of the vehicle.

[0010]

FIG. 1 is a structural view of a glass antenna for an automobile according to the present invention, showing a first embodiment. 1 is a rear window glass of an automobile, and 2 is a conductor wire of a defogger. The defogger pattern consists of the common electrodes 3 on both sides on the glass surface.
Are formed in the shape of a sun by a plurality of conductor lines parallel to the conductor line 2 connecting the conductor lines 2 and 4. An antenna pattern including the conductor wires 5 and 6 and the power supply terminal 7 and a pair of conductor wires 8, 9, 1
The antenna patterns composed of the power supply terminals 11 and 15 at 0, 12, 13, and 14 are formed in the upper and lower central portions of the defogger pattern, respectively, and the antenna pattern composed of the conductor wires 16, 17, 18 and the power supply terminal 19 , Conductor wire 2
Antenna patterns composed of 0, 21, 22 and the power supply terminal 23 are formed on the upper right and left sides of the defogger pattern, respectively.

Reference numeral 24 denotes a choke coil circuit configured in the same manner as 175 and 176 in FIG. 9. One of two terminals between which a voltage stabilizing capacitor is connected is connected through power supply lines 25 and 27, respectively. The power supply lines 29 and 30 connected to the ground potential of the vehicle body indicated by 26 and the DC power supply potential V _DD via the switch 28 and connected to the other two terminals of the choke coil, respectively, are connected near the low frequency of the FM radio broadcast band. higher than the frequency, are connected to the common electrodes 3 through coils 31 of the two to be self-resonant at a frequency lower than the frequency band VHF _H of VHF television broadcast.

A coaxial cable 3 is connected to a feed terminal 7 of the antenna pattern arranged at the upper central portion of the defogger pattern.
6, a signal line 33 from the internal conductor at one end is connected, a ground line 34 connected to the external conductor is connected to the vehicle body denoted by 35, and the external conductor at the other end of the coaxial cable 36 is connected to the ground potential GN.
As D, and outputs the received signal Y ₁ from the inner conductor.

The feeder terminals 11 and 15 of the antenna pattern arranged at the lower central part of the defogger pattern are connected to the signal line 3 from the inner conductor at one end of the coaxial cable 39 and the outer conductor.
7, 38 were connected, the other end of the outer conductor of the coaxial cable 39 as a ground potential GND, and outputs a received signal Y ₂ from the inner conductor.

The signal line 42 connected to the power supply terminal 19 of the antenna pattern disposed on the upper right side of the defogger pattern and the signal line 41 connected to the upper electrode of the common electrode 3 of the defogger pattern are connected to the input of the circuit 40. A signal line, a signal line from an inner conductor at one end of a coaxial cable 45 is connected to an output of the circuit 40, and a ground line 43 connected to an outer conductor is connected to a vehicle body denoted by 44.
As the ground potential GND to the outer conductor at the other end, and outputs the received signal X ₁ from the inner conductor.

A signal line 46 from an inner conductor at one end of a coaxial cable 49 is connected to the feed terminal 23 of the antenna pattern disposed on the upper left side of the defogger pattern, and a ground line 47 connected to an outer conductor. It was connected to the vehicle body shown at 48, the other end of the outer conductor of the coaxial cable 49 as a ground potential GND, and outputs the received signal X ₂ from the inner conductor.

The antenna pattern in the upper central part of the defogger pattern is such that horizontal conductor lines 5 and 6 parallel to the defogger conductor line 2 have the same length and are symmetrical with respect to the feed terminal 7. The conductor wires 5 and 6 are in the high frequency band VHF _H (170 to 222 MHz) of VHF television broadcasting.
1/4 of the wavelength in the glass of the signal of the frequency in the vicinity, that is, 1/4 of the wavelength in the air multiplied by the shortening rate of the glass, and 1 / 6.2 of the wavelength in the air. Length. The total length of the two conductor wires 5 and 6 on both sides is FM
From a radio broadcast band (76 to 90 MHz) to a signal of a frequency near the low frequency band VHF _L (90 to 108 MHz) of VHF television broadcasting, to 1/4 of the wavelength in glass and 1 / 6.2 of the wavelength in air. Has become.

The lower central antenna pattern of the defogger pattern includes a right pattern consisting of conductor lines 8, 9, and 10 and a feeding terminal 11, and a left pattern consisting of conductor lines 12, 13, and 14 and a feeding terminal 15. Symmetrical dipole antenna, the conductor wires 8 and 12, 9 and 13 which are parallel to the defogger conductor wire 2 and are paired in the horizontal direction are equal to each other. Conductor wires 8, 9
, 12 and 13 are connected to the feed terminals 11 and 15, respectively, and the lengths of the vertical conductor wires 10 and 14 are equal.

The conductor wires 8 and 12 are from the FM radio broadcast band.
VHF low frequency band VHF for TV broadcasting _LNearby frequencies
1/4 of the wavelength of the signal in glass, the wavelength in air
And the conductor wires 9 and 13 are V
High frequency band VHF of HF television broadcasting_HOf nearby frequencies
1/4 of the wavelength of the signal in glass, the wavelength in air
The length is 1 / 6.2.

The antenna pattern on the upper right side of the defogger pattern includes two horizontal conductor lines 16 and 17 parallel to the defogger conductor line 2 and a vertical conductor line 18.
The conductor wire 18 is parallel to the glass side near the window frame of the vehicle body, and the conductor wire 16 has a frequency near the low frequency band VHF _L of the VHF television broadcast from the FM radio broadcast band. 1/4 of the wavelength of the signal in glass,
1 / 6.2 of the wavelength in the air, conductor wire 17 is VH
1/4 of the wavelength in glass of the signal of the frequency near the high frequency band VHF _H of F television broadcasting, and 1 of the wavelength in the air
/6.2 length.

The antenna pattern on the upper left side of the defogger pattern includes two horizontal conductor lines 20 and 21 parallel to the defogger conductor line 2 and a vertical conductor line 22.
The conductor wire 22 is parallel to the glass side near the window frame of the vehicle body, and the conductor wires 20 and 21 are equal in length and have a frequency near the high frequency band VHF _H of VHF television broadcasting.信号 of the wavelength of the signal in the glass,
The length is 1 / 6.2 of the wavelength in the air.

The circuit 40 extracts a received signal having a frequency equal to or higher than the FM radio broadcast band from the antenna pattern on the upper right side of the defogger pattern, and extracts A from the defogger pattern.
This is a filter circuit for extracting and synthesizing a received signal in the M radio broadcast band (0.5 to 1.6 MHz).

FIG. 2 shows a circuit of the filter, in which a capacitor 50, a coil 51 and a resistor 52 are connected in parallel between an input terminal P _D and an output terminal Q, and a coil having a self-resonant frequency equal to or higher than the FM radio broadcast band. 53 was a filter for taking out a received signal of the AM radio broadcast band are connected in series, an input terminal P ₁ between the output terminal Q, a filter to take out a reception signal of FM radio broadcast band frequencies above by connecting a capacitor 54 , And outputs the combined reception signal from the output terminal Q. The signal lines 41 and 42 of FIG. 1 are connected to the input terminals P _D and P ₁ , respectively.

The coil 51 resonates in series with the capacitance between the vehicle body in the defogger pattern and a signal having a frequency near the AM radio broadcasting band. A resistor 52 is connected in parallel to the coil 51. The receiving sensitivity in the AM radio broadcast band is higher than in a certain case. At frequencies above the FM radio broadcast band, the impedance of the coil 53 is high,
From the antenna pattern on the upper right side of the defogger pattern, through the capacitor 54, the FM radio broadcast band, VHF,
It outputs a reception signal of the UHF television broadcasting band.

Each of the filter circuits shown in FIG. 2 is formed using chip components. For example, the capacitance 50 is 10 nF, the coil 51 is 100 μH, the resistor 52 is 2.2 kΩ, the coil 53 is 2 μH and the chip inductor is 1 μH. , And the capacitance 54 is 100 pF.

The conductor lines 5 and 6 of the antenna pattern in the upper central part of the defogger pattern of FIG. 1, the conductor lines 9 and 13 of the antenna pattern in the lower central part of the defogger pattern, and the antenna pattern on the upper right side of the defogger pattern Conductor line 17 and conductor lines 20 and 21 of the antenna pattern on the upper left side of the defogger pattern have a length of 1/4 of the wavelength in glass of a signal of a frequency near the high frequency band VHF _H of VHF television broadcasting. A signal whose frequency is 1 / 6.2 of the wavelength in the air and near the UHF television broadcasting band (470 to 770 MHz) is 3/4 of the wavelength in the glass and 3/3 of the wavelength in the air. It has a length of /6.2 and is used as a conductor wire of an antenna pattern having high sensitivity in the low frequency band VHF _L , the high frequency band VHF _H , and the UHF television broadcasting band of VHF television broadcasting.

The length obtained by adding the conductor lines 5 and 6 of the antenna pattern in the upper central part of the defogger pattern, and the conductor lines 8 and 1 of the antenna pattern in the lower central part of the defogger pattern
2. Each length of the conductor line 16 of the antenna pattern on the upper right side of the defogger pattern is V from the FM radio broadcast band.
The FM radio broadcast band and the VHF television have a length of 1/4 of the wavelength in the glass and 1 / 6.2 of the wavelength in the air of a signal having a frequency near the low frequency band VHF _L of the HF television broadcast. It is used for a conductor line having an antenna pattern with high sensitivity in the broadcasting low frequency band VHF _L and UHF television broadcasting band.

In transmission / reception measurement at frequencies of the FM radio broadcasting band, the VHF television broadcasting band, and the UHF television broadcasting band, an antenna pattern having a symmetrical and common central power supply configuration in the upper central portion of the defogger pattern, and a defogger. The antenna pattern of the configuration of the dipole antenna in the lower central part of the pattern tends to compensate for the directional characteristics of the receiving sensitivity, and the antenna pattern on the upper right side of the defogger pattern and the upper left side of the defogger pattern The antenna pattern of the reception sensitivity has a shape of left-right reversal in the directivity curve of the receiving sensitivity and has a shape that compensates each other, and the antenna pattern of the central part on the upper or lower side of the defogger pattern and the right or left on the upper side of the defogger pattern The antenna patterns on the side of have a directivity curve different from each other and compensate for each other.

The choke coil of the choke coil circuit 24 has a high impedance in the AM radio broadcasting band. The high frequency band VHF _H lower frequency VHF television broadcast, for example, coils 31 and 32 to self-resonate at a certain frequency from the vicinity of the FM radio broadcast band in the vicinity of the low frequency band VHF _L of VHF television broadcasts, FM radio broadcast band and VHF High impedance in the low frequency band VHF _L of TV broadcasting. Therefore, in the high frequency band VHF _H and the UHF television broadcasting band of the VHF television broadcasting, the impedance of the coils 31 and 32 and
With the impedance of the power supply lines 29 and 30 extended from the coils 31 and 32, in the receiving broadcast band, the defogger pattern is substantially electrically separated from the power supply circuit for heating the defogger, and the defogger pattern is received in the AM radio broadcast band. The antenna patterns arranged on the upper and lower central parts of the defogger pattern and on the upper right and left sides are VHF, UHF
It functions sufficiently as an antenna for receiving television broadcast bands.

The antenna configured to combine the received signal of the defogger pattern and the antenna pattern on the upper right side of the defogger pattern by the circuit 40 has a reception signal X ₁ of the AM and FM radio broadcasting band and the VHF and UHF television broadcasting band. outputs a, antenna pattern of the upper left side of the defogger pattern outputs FM radio broadcast band and VHF, the received signal X ₂ of UHF television broadcast band, the received signal of the X ₁ AM radio broadcast band, X ₁ , and the X ₂ to 2 channel of the received signal for diversity reception of FM radio broadcast band.

The antenna patterns at the upper central part and the lower central part of the defogger pattern are FM radio broadcast band and VH
The reception signals Y ₁ and Y ₂ of the F and UHF television broadcasting bands are output, respectively. X ₁ , X ₂ and Y ₁ , Y ₂ are four-channel reception signals for diversity reception in the VHF and UHF television broadcasting bands.

As reception signals of the AM radio broadcasting band and the FM radio broadcasting band of two channels, a reception signal X _{1 obtained} by synthesizing a reception signal of a defogger pattern and an antenna pattern on the upper right side of the defogger pattern by a circuit 40; defogger pattern upper central portion or using the received signal Y ₁ or Y ₂ of the antenna pattern of the lower central portion of the, corresponding a reception signal of the antenna pattern of the upper central portion of the received signal and defogger pattern defogger pattern circuit 40 the received signal synthesized in the circuit of the filter, it is possible to use a received signal of the antenna pattern of the upper side portion of the received signal Y ₂ or defogger pattern of the antenna pattern of the lower central portion of the defogger pattern.

The dimensions of the antenna pattern are, for example, such that the common electrodes 3 and 4 at both end portions of the defogger pattern are 39c.
m, ten parallel conductor wires shown in the horizontal direction are 1
There are 14 lines with a width of 3 mm and a width of 3 mm. The dimension of the horizontal conductor wire between the common electrodes 3 and 4 is 1
The lower side of the 18th and 14th line is 146cm.

The horizontal conductor lines 5 and 6 of the antenna pattern in the upper central part of the defogger pattern are 25c.
m, horizontal conductor lines 8 and 12 of the lower central portion of the defogger pattern are 53 cm, 9 and 13 are 25 cm, and the distance between the conductor lines 8 and 9, 12 and 13 is 3 cm, and the defogger pattern is Of the antenna pattern on the upper right side of the antenna pattern is 39 cm, and 17 is 2
5 cm, the distance between 16 and 17 is 3 cm, the horizontal conductor lines 20 and 21 of the antenna pattern on the upper left side of the defogger pattern are 25 cm, and the distance between 20 and 21 is 3c.
m.

The distance between the horizontal conductor lines 8 and 12 of the antenna pattern at the lower central portion of the defogger pattern and the fourteenth conductor line of the defogger pattern is 3 cm, and the vertical conductor lines 10 and 14 are 6.5 cm. And the distance between 10 and 14 is 3 cm.

The distance between the horizontal conductor line 16 of the antenna pattern on the upper right side of the defogger pattern and the first conductor line 2 of the defogger pattern is 3 cm, and the vertical conductor line 18 is 6 cm. The distance between 18 and the glass side is 3 cm, the distance between the horizontal conductor line 20 of the antenna pattern on the upper left side of the defogger pattern and the first conductor line 2 of the defogger pattern is 3 cm, The conductor wire 22 is 6 cm, and the distance between 22 and the glass side is 3 cm.

The feed terminals 7, 11 and 15, 19, and 23 of each antenna pattern are rectangular with a length of 1.2 cm and a width of 1.6 cm, and are close to the antenna pattern of the dipole antenna at the lower central portion of the defogger pattern. The gap between the two power supply terminals 11 and 15 is 2.2 cm.

FIG. 3 is a view showing the configuration of a second embodiment of the glass antenna for a vehicle according to the present invention. Elements that are functionally the same as those in FIG. 1 are given the same reference numerals.

The antenna pattern at the upper central portion of the defogger pattern has a symmetrical configuration, and the right pattern is composed of two conductor lines 55 and 56 having the same length in the horizontal direction and conductor lines 57 in the vertical direction. It is connected to a horizontal conductor wire 61 parallel to the upper side of the glass near the window frame of the vehicle body, and the left pattern is two conductor wires 58, 5 and 5 having the same horizontal length.
9 is connected by a vertical conductor line 60 and is connected to a horizontal conductor line 61, and the horizontal conductor line 61 is connected to a power supply terminal 62 on the right side.

The conductor lines 55, 56 and 58, 59 VHF television broadcasting frequency band VHF _H near to length of 1/4 of the wavelength in glass of the frequency of the signal, the wavelength in the air 1 /
The length of 6.2 plus 55 and 58, and 56 and 59 plus the left and right conductor lines is in the glass of the signal of the frequency near the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast. 1/4 of the wavelength in the air, 1 / 6.2 of the wavelength in the air
Length.

The input signal line 41 of the circuit 40 is connected to the upper electrode of the common electrode 3 of the defogger pattern, and the input signal line 42 is connected to the power supply terminal 62.
Thus, a reception signal of the AM radio broadcast band is extracted from the defogger pattern, and a reception signal of a frequency equal to or higher than the FM radio broadcast band is extracted from the antenna pattern in the upper central portion of the defogger pattern and synthesized. A signal line of an inner conductor at one end of the coaxial cable 45 is connected to an output of the circuit 40, an outer conductor is connected to a vehicle body indicated by a ground line 43 at 44, and an outer conductor at the other end of the coaxial cable 45 is set to a ground potential GND. AM from the inner conductor, FM radio broadcast band and VHF, and outputs the received signal X ₁ of the UHF television broadcast band.

As shown in FIG. 1, the antenna pattern at the lower central portion of the defogger pattern includes the right pattern consisting of the conductor lines 8, 9, and 10 and the power supply terminal 11, and the conductor lines 12 and 1,
A left-right symmetric dipole antenna is formed by the left pattern composed of the power supply terminals 3 and 14 and the power supply terminal 15. The power supply terminals 11 and 15 have signal lines 68 from the inner conductor and the outer conductor at one end of the coaxial cable 72. 69, the ground wire 70 connected to the outer conductor is connected to the vehicle body denoted by 71, the outer conductor at the other end of the coaxial cable 72 is set to the ground potential GND, and the FM radio broadcast band, VHF, UHF and outputs the received signal X ₂ of the TV broadcast band.

The antenna pattern on the upper right side of the defogger pattern has a feed terminal 64
Is connected, and the conductor wire 63 is one of the wavelengths in the glass of the signal of the frequency near the high frequency band VHF _H of the VHF television broadcast.
/ 4, 1 / 6.2 of the wavelength in air. A signal line 73 from the inner conductor at one end of the coaxial cable 76 is connected to the power supply terminal 64, and a ground wire 74 connected to the outer conductor is connected to the vehicle body denoted by 75.
The ground potential GND to 6 and the other end of the outer conductor of the, FM radio broadcast band than the inner conductor and the VHF, and outputs the received signal Y ₁ of the UHF television broadcast band.

In the antenna pattern on the upper left side of the defogger pattern, a horizontal conductor wire 65 is connected to a feed terminal 67 by a vertical conductor wire 66 parallel to the glass side near the window frame of the vehicle body. The length of the conductor wire 65 is longer than the conductor wire 66.

The length of the conductor line 65 or the sum of the conductor lines 65 and 66 is 、 of the wavelength in the glass of the signal of the frequency near the high frequency band VHF _H of the VHF television broadcast, and the length in the air. The wavelength is 1 / 6.2 of the wavelength, and the signal of the frequency near the UHF television broadcasting band is 3/4 of the wavelength in glass and 3 / 6.2 of the wavelength in air. . The signal line 77 from the inner conductor at one end of the coaxial cable 80 is connected to the power supply terminal 67, and the ground wire 7 connected to the outer conductor
8 is connected to the vehicle body denoted by 79, and the outer conductor at the other end of the coaxial cable 80 is set to ground potential GND, and FM is
Radio broadcast band and VHF, and outputs the received signal Y ₂ of UHF TV broadcast band.

The reception signal X ₁ is a reception signal of an AM radio broadcasting band, X ₁ and X ₂ are reception signals of two channels for diversity reception of an FM radio broadcasting band, and X ₁ , X ₂ , Y ₁ and Y ₂ are Vs.
4 for diversity reception of HF and UHF television broadcasting bands
The received signal of the channel.

As an example, the dimensions of the antenna pattern are such that the horizontal conductor lines 55, 56, 58 and 59 of the antenna pattern in the upper central part of the defogger pattern are 25 cm and 5 cm.
5 and 56, 58 and 59 are 3 cm apart, vertical conductors 57 and 60 are 9.3 cm, 57 and 60
The antenna pattern at the lower central portion of the defogger pattern is 3 cm apart from the horizontal conductor wires 8 as in the example of FIG.
And 12 are 53cm, 9 and 13 are 25cm, 8 and 9, 1
The distance between the conductor wires 2 and 13 is 3 cm, the vertical conductor wires 10 and 14 are 6.5 cm, and the distance between 10 and 14 is 3c.
m, the horizontal conductor line 63 of the antenna pattern on the upper right side of the defogger pattern is 20 cm, the horizontal conductor line 65 of the antenna pattern on the upper left side of the defogger pattern is 15 cm, and the vertical conductor line 66 Is 6cm
Where the distance between 66 and the glass side is 3 cm.

The distance between the horizontal conductor lines 55 and 58 in the upper central portion of the defogger pattern and the first horizontal conductor line 2 of the defogger pattern is 3 cm, and the distance between the horizontal conductor line 61 and the upper side of the glass is 3 cm. The spacing is 2.6 cm, the spacing between the horizontal conductor lines 8 and 12 of the antenna pattern in the lower central part of the defogger pattern and the bottom horizontal conductor line of the defogger pattern is 3 cm, and the upper right of the defogger pattern The distance between the horizontal conductor line 63 of the antenna pattern on the side of the defogger pattern and the first conductor line 2 of the defogger pattern is 3 cm, and the horizontal conductor line 65 of the antenna pattern on the upper left side of the defogger pattern and the defogger The spacing between the first conductor wires 2 of the pattern is 3 cm.

The antenna pattern at the upper central portion of the defogger pattern for outputting the reception signals of the FM radio broadcast band and the VHF and UHF television broadcast bands is a conductor line 55 in the horizontal direction.
And the right end of 56 and the left end of 58 and 59 may be connected by vertical conductor lines, respectively, to form a pattern surrounded by a rectangle. The distance between the vertical conductor lines 57 and 60 is reduced, It may be 0.2 cm.

FIG. 4 is a view showing the configuration of a third embodiment of the glass antenna for a vehicle according to the present invention. 1 and 3, functionally the same components are denoted by the same reference numerals. The defogger pattern consists of the common electrodes 3 on both sides on the glass surface.
Are formed in the shape of a cross by a plurality of conductor lines parallel to the horizontal conductor line 2 and a common conductor line 81 which intersects the horizontal conductor line in the center in the vertical direction and is commonly connected. ,
Furthermore, on the upper right and left sides, a plurality of horizontal conductor lines vertically intersect, and the connection points of the conductor lines internally divide the length of the conductor lines between the common electrodes on both sides substantially equally. It has common conductor lines 82 and 83 that are commonly connected.

The antenna pattern in the upper central part of the defogger pattern has the same length in the horizontal conductor lines 84 and 86 and the vertical conductor lines 85 and 87 and is symmetrical with respect to the feed terminal 89. The right pattern connects the horizontal conductor line 84 with the vertical conductor line 85, connects to the power supply terminal with the horizontal conductor line 88 along the lower side of the power supply terminal 89, and the left pattern shows the horizontal The conductor wire 86 is connected by a vertical conductor wire 87 and connected to a power supply terminal 89 by a horizontal conductor wire 88.

The conductor lines 84, 86 VHF television broadcasting frequency band VHF _H to length of 1/4 of the wavelength in glass of the frequency of the signal around, a length of 1 / 6.2 of a wavelength in air , 84 and 86 plus the left and right conductor lines have a length of 1/4 of the wavelength in the glass of a signal having a frequency near the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast,
It is 1 / 6.2 of the wavelength in air.

A signal line 100 from the inner conductor at one end of the coaxial cable 103 is connected to the power supply terminal 89, a ground wire 101 connected to the outer conductor is connected to the vehicle body indicated by 102, and the other end of the coaxial cable 103 is connected to the other end. Ground the external conductor to ground potential G
As ND, FM radio broadcasting band and VHF from inner conductor,
And outputs the received signal X ₂ of UHF TV broadcast band.

The lower central antenna pattern of the defogger pattern has horizontal conductor lines 90 and 9 having the same length.
2 are connected to the vertical conductor wires 91 and 93 having the same length, respectively, connected to the horizontal conductor wire 94 along the upper side of the power supply terminal 95 and connected to the power supply terminal. It has a symmetrical configuration.

[0054] The conductor line 90, 92 VHF television broadcasting frequency band VHF _H to length of 1/4 of the wavelength in glass of the frequency of the signal around, a length of 1 / 6.2 of a wavelength in air , 90 and 92 plus the left and right conductor lines are １ ／ of the wavelength in the glass of a signal of a frequency near the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast,
It is 1 / 6.2 of the wavelength in air.

A signal line 104 from the inner conductor at one end of the coaxial cable 107 is connected to the power supply terminal 95, a ground wire 105 connected to the outer conductor is connected to the vehicle body indicated by 106, and the other end of the coaxial cable 107 is Ground the external conductor to ground potential G
As ND, FM radio broadcasting band and VHF from inner conductor,
And it outputs the received signal Y ₂ of UHF TV broadcast band.

The antenna pattern on the upper right side of the defogger pattern has two conductor lines 96 and 97 in the horizontal direction.
Is connected to the power supply terminal 99 by a vertical conductor wire 98 parallel to the glass side near the window frame of the vehicle body.
The conductor line 97 has a length of 1/4 of the wavelength in the glass and 1 / 6.2 of the wavelength in the air of the signal of the frequency near the high frequency band VHF _H of the HF television broadcast. The length of a signal having a frequency near the low-frequency band VHF _L of the VHF television broadcast is set to 1/4 of the wavelength in glass and 1 / 6.2 of the wavelength in air.

The input signal line 41 of the circuit 40 is connected to the upper electrode of the common electrode 3 in the defogger pattern, and the input signal line 42 is connected to the power supply terminal 99.
Thus, a reception signal of the AM radio broadcast band is extracted from the defogger pattern, and a reception signal of a frequency equal to or higher than the FM radio broadcast band is extracted from the antenna pattern on the upper right side of the defogger pattern and synthesized. A signal line of an inner conductor at one end of the coaxial cable 45 is connected to an output of the circuit 40, an outer conductor is connected to a vehicle body indicated by a ground line 43 at 44, and an outer conductor at the other end of the coaxial cable 45 is set to a ground potential GND. AM from the inner conductor, FM radio broadcast band and VHF, and outputs the received signal X ₁ of the UHF television broadcast band.

The antenna pattern on the upper left side of the defogger pattern is similar to that shown in FIG.
Is connected to the power supply terminal 67 by a vertical conductor line 66 parallel to the glass side near the window frame of the vehicle body, and a signal line 77 from an inner conductor at one end of the coaxial cable 80 is connected to the power supply terminal 67, The ground wire 78 connected to the conductor is connected to the vehicle body denoted by 79, and the outer conductor at the other end of the coaxial cable 80 is set to the ground potential GND, and the reception signal of the FM radio broadcast band and the VHF and UHF television broadcast bands from the inner conductor. and outputs the Y _1.

The received signal X ₁ is a received signal of an AM radio broadcast band, X ₁ and X ₂ are two-channel received signals for diversity reception of an FM radio broadcast band, and X ₁ , X ₂ , Y ₁ and Y ₂ are Vs.
4 for diversity reception of HF and UHF television broadcasting bands
The received signal of the channel.

The dimensions of the antenna pattern are, for example, common conductor lines 82 and 83 on the right and left sides of the defogger pattern.
Is 12 cm, each interval between 82 and 83 and the common electrodes 3 and 4 includes 23 cm, and two horizontal conductor lines 84 and 86 of the antenna pattern in the upper central portion of the defogger pattern are formed.
5 cm, the distance between 84, 86 and the first horizontal conductor line 2 of the defogger pattern is 3 cm, the vertical conductor lines 85 and 87 are 8.3 cm, and the distance between 85 and 87 is 3
cm, the horizontal conductor lines 90 and 92 of the antenna pattern in the lower central part of the defogger pattern are 25 cm, 9 cm.
The distance between 0, 92 and the bottom horizontal conductor line of the defogger pattern is 3 cm, and the vertical conductor lines 91 and 93
Is 6.5 cm, the distance between 91 and 93 is 3 cm, the horizontal conductor line 96 of the antenna pattern on the upper right side of the defogger pattern is 25 cm, the distance 97 is 39 cm, and the distance between 96 and 97 is 3 cm, 96 and The distance between the first conductor wires 2 of the defogger pattern is 3 cm, and the vertical conductor wires 9
8 is 6 cm, the distance between 98 and the glass side is 3 cm,
The antenna pattern on the upper left side of the defogger pattern has a horizontal conductor wire 65 of 15 cm as in the example of FIG.
The distance between 65 and the first conductor line 2 of the defogger pattern is 3 cm, the vertical conductor line 66 is 6 cm,
The distance between 6 and the side of the glass is 3 cm.

The antenna pattern in the upper central part of the defogger pattern is configured to have two horizontal conductor lines on the left and right sides as shown in FIG. 3, and the conductor lines 84 and 86 corresponding to the conductor lines 55 and 58 are formed. The conductor wires corresponding to the conductor wires 56 and 59 are shorter than the length, for example, 13 cm or 8.3.
3 or have two horizontal conductor lines of 25 cm each on the left and right as shown in FIG. 3, and the entire conductor line is not overlapped with the conductor line 97 of the antenna pattern on the right side. The antenna pattern in the lower central portion of the defogger may be similarly configured to have two horizontal conductor wires on the left and right sides.

As the reception signals of the AM radio broadcasting band and the FM radio broadcasting band of two channels, the reception signal of the defogger pattern and the reception signal of the antenna pattern in the upper center part of the defogger pattern are synthesized by a filter circuit corresponding to the circuit 40. And the received signal of the antenna pattern on the upper right side of the defogger pattern or the received signal Y ₂ of the antenna pattern on the lower central part of the defogger pattern
Can be used.

FIG. 5 is a diagram showing the configuration of a fourth embodiment of the glass antenna for a vehicle according to the present invention. 1, 3 and 4, functionally identical elements are denoted by the same reference numerals. The upper electrode of the common electrode 3 of the defogger pattern is connected to a vertical conductor wire 108 near the window frame of the vehicle body and parallel to the glass side, and furthermore, a horizontal conductor wire 109 parallel to the glass upper side near the window frame of the vehicle body. To the power supply terminal 110 arranged at the upper central portion of the defogger pattern.

The antenna pattern in the upper central part of the defogger pattern is symmetrical with respect to the feed terminal 119, and the two conductor wires 1 in the horizontal direction of the right pattern are arranged.
The vertical conductor lines 113 connecting the right horizontal two conductor lines 111 and 112 have the same length in the horizontal direction of the two conductor lines 114 and 115 of the left pattern. And two horizontal conductor wires 11 on the left
4, 115 have the same length in the vertical conductor line 116. The vertical conductor lines 113 and 116 are connected to the upper horizontal conductor line 117, and the conductor
Is connected to the power supply terminal 119 by a conductor line 118 extending in the vertical direction from the center.

The conductor lines 111 and 114 are １ ／ of the wavelength in glass of a signal having a frequency near the low frequency band VHF _L of the FM radio broadcast band to VHF television broadcast, and １ ／ of the wavelength in air. .2 and the conductor lines 112 and 115 are V
The length of a signal having a frequency near the high frequency band VHF _H of HF television broadcasting is set to 1/4 of the wavelength in glass and 1 / 6.2 of the wavelength in air.

The circuit 125 corresponds to the circuit 40 shown in FIGS.
Is configured to be mounted on a glass surface.
Are shown by input signal lines 41 and 42. The input terminals of the circuit 125 corresponding to the terminals indicated by the input terminals P _D and P ₁ in FIG. 2 are the power supply terminal 110 of the signal from the defogger pattern and the power supply terminal 119 of the antenna pattern in the upper central part of the defogger pattern. It is connected. Circuit 125
, The received signal of the AM radio broadcast band is extracted from the defogger pattern, and the received signal of the frequency equal to or higher than the FM radio broadcast band is extracted from the antenna pattern in the upper central part of the defogger pattern and synthesized.

The output of the circuit 125 is connected to the signal line of the inner conductor at one end of the coaxial cable 128, and the outer conductor is connected to the ground line 1.
At 26, the coaxial cable 128 is connected to the vehicle body 127.
The ground potential GND to the outer conductor at the other end of the, AM from the inner conductor, FM radio broadcast band and VHF, and outputs the received signal X ₁ of the UHF television broadcast band.

As shown in FIGS. 1 and 3, the antenna pattern at the lower central portion of the defogger pattern includes the right conductor pattern composed of the horizontal conductor wires 8 and 9 and the vertical conductor wire 10 and the power supply terminal 11, A left-right symmetrical dipole antenna is formed by a left pattern composed of feed terminals 15 on horizontal conductor lines 12 and 13 and a vertical conductor line 14.
The signal wires 68 and 69 from the inner conductor and the outer conductor at one end of the coaxial cable 72 are connected to the power supply terminals 11 and 15, and the ground wire 70 connected to the outer conductor is connected to the vehicle body denoted by 71. 72 is connected to the ground potential G
As ND, FM radio broadcasting band and VHF from inner conductor,
And outputs the received signal X ₂ of UHF TV broadcast band.

The antenna pattern on the upper right side of the defogger pattern has a feed terminal 1
21 is connected to the conductor line 120 is the length of the VHF TV 1/4 of the length of the wavelength in glass of the frequency of the signal in the vicinity high frequency band VHF _H broadcast, 1 / 6.2 of the wavelength in the air ing. A signal line 129 from the inner conductor at one end of the coaxial cable 132 is connected to the power supply terminal 121, the ground wire 130 connected to the outer conductor is connected to the vehicle body denoted by 131, and the outer conductor at the other end of the coaxial cable 132 is connected Ground potential G
As ND, FM radio broadcasting band and VHF from inner conductor,
And outputs the received signal Y ₁ of the UHF TV broadcast band.

The antenna pattern on the upper left side of the defogger pattern has a horizontal conductor line 122 connected to a power supply terminal 124 by a vertical conductor line 123 parallel to the glass side near the window frame of the vehicle body. the conductor line 122 VHF television broadcasting frequency band VHF _H to length of 1/4 of the wavelength in glass of the frequency of the signal near, the wavelength in the air 1/6.
It has a length of 2. Coaxial cable 1 to power supply terminal 124
The signal line 133 from the inner conductor at one end of the coaxial cable 136 is connected to the vehicle body denoted by 135, and the outer conductor at the other end of the coaxial cable 136 is set to the ground potential GND. FM radio broadcast band and VHF a conductor, and outputs the received signal Y ₂ of the UHF television broadcast band.

The reception signal X ₁ is a reception signal of an AM radio broadcasting band, X ₁ and X ₂ are reception signals of two channels for diversity reception of an FM radio broadcasting band, and X ₁ , X ₂ , Y ₁ and Y ₂ are Vs.
4 for diversity reception of HF and UHF television broadcasting bands
The received signal of the channel.

The circuit 125 is a synthesizing circuit shown in FIG. 6. The received signal from the defogger pattern passes through a filter for extracting a received signal in the AM radio broadcasting band. ,
A power line for supplying a power supply potential V _PP to the circuit is configured to output a synthesized reception signal through a circuit of an emitter follower of a transistor operating at frequencies of an FM radio broadcast band and VHF and UHF television broadcast bands.
May be arranged along.

Between the input terminal P _D and the output terminal Q, the capacitor 50 and the coil 51 and the resistor 52 are connected in parallel as shown in FIG.
3 are connected in series to form a filter for extracting a received signal in the AM radio broadcast band.

The input terminal P _{1 is connected} to the NP through the capacitor 137.
N is connected to the base of the transistor 138, the bias resistor 139 is connected between the collector and the base, the load resistor 140 is connected between the emitter and the ground potential, and the emitter of the transistor 138 is connected to the output terminal Q through the capacitor 141. Connected. The power supply potential V _CC of the collector of the transistor 138 is formed by lowering the power supply potential V _PP by the voltage of the Zener diode 143 and the diode 144 after passing the coil 145 and stabilizing the power supply potential V _CC with the capacitor 142.

As the components of the composite circuit shown in FIG. 6, chip components, small-sized transistors and diodes are used. For example, the capacitance 137 is 100 pF and the resistance 139 is 7
5 kΩ, resistance 140 is 50 Ω, capacitance 141 is 33 pF,
The capacitance 142 is 0.47 μF, and the coil 145 is 330 μH
And the power supply potential V _{CC of the} collector is 8.5V.

The coil 53 of the filter for extracting the received signal in the AM radio broadcast band of the combining circuit of FIG. 6 is connected not to the output terminal Q but to the base of the transistor 138, and the filter circuit of FIG. The capacitance 141 is set to, for example, 10 nF.
Through the circuit of the emitter follower, it is possible to output reception signals of AM and FM radio broadcast bands and VHF and UHF television broadcast bands.

[0077] In the circuit of FIG. 6, connects the input terminal P _D by removing a circuit filter consisting of components 50 to 53 to the ground potential, the emitter signals received over FM radio broadcast band from the input terminal P ₁ The output is made through the follower circuit. The circuit configured in this way is connected to the input terminals P ₁ and P _D at the feed terminals 11 and 15 of the antenna pattern at the lower central portion of the defogger pattern, respectively, as in the circuit 125, and mounted. Broadcasting band and VHF, U
A reception signal of the HF television broadcasting band can be output.

The transistor of the emitter follower is a transistor operating at the frequency of the FM radio broadcasting band and the frequency of the VHF television broadcasting band. The circuit 125 of FIG. 5 is a synthesizing circuit shown in FIG. 7, and the received signal from the defogger pattern is as shown in FIG. components between the same input terminal P _D and the output terminal Q 50 to 5
3 through a filter for extracting a reception signal in the AM radio broadcasting band, and a reception signal in the FM radio broadcasting band and the low frequency band VHF _L of the VHF television broadcasting from the antenna pattern in the upper central part of the defogger pattern is an emitter follower circuit. Through the high frequency bands VHF _H and UH of VHF television broadcasting
The reception signal in the F television broadcasting band may be output through a filter that extracts a reception signal having a frequency in the vicinity of the high frequency band VHF _H of the VHF television broadcasting.

The circuit of FIG. 7 is functionally the same as the circuit of FIG.
Elements have the same reference numerals. Input terminal P₁The capacity
NPN transistor through 146 and through coil 147
Connected to the base of the
Connect a resistor 149 for grounding, between the emitter and ground potential
A load resistor 150 is connected, and the transistor 148 is turned off.
Through the series connection of the capacitance 151 and the coil 152
Connect to output terminal Q and input terminal P₁Capacity 1 connected to
Between the capacitor 153 and the coil 154
Connected in parallel. A collection of transistors 148
Power supply potential V _CCIs the power supply potential V, as in FIG._PPThe
After passing through the coil 145, the diode 144 and the Zenerda
Reduce by the voltage of Iod 143 and stabilize by capacitance 142
ing.

The series connection of the capacitor 151 and the coil 152 connected to the output of the emitter follower is series-resonant with a signal having a frequency in the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast, and the impedance is reduced. parallel connection of the input capacitance 153 is connected via a capacitor 146 to terminal P ₁ and the coil 154, VH from the FM radio broadcast band
The signal of the frequency in the low frequency band VHF _L of the F television broadcast is parallel-resonated to increase the impedance, and the reception signal of the low frequency band VHF _L of the FM radio broadcast band and the VHF television broadcast is output from the emitter follower of the transistor 148. Is output to an output terminal Q through a series-connected filter of a capacitor 151 and a coil 152.

At frequencies above the high frequency band VHF _H of the VHF television broadcast, the impedance of the coil 147 connected to the input terminal P ₁ via the capacitor 146 and connected to the base of the transistor 148, and the output of the emitter follower impedance of the series connection of a capacitor connected 151 and the coil 152 is increased, capacity 1 to the input terminal P ₁
46 becomes low impedance of the parallel connection of a capacitor connected 153 and the coil 154 through the high frequency band VHF _H and received signals in the UHF television broadcast band of VHF television broadcasting, a parallel connection of filter capacitor 153 and the coil 154 Through the output terminal Q.

The components of the synthesis circuit shown in FIG. 7 are, for example, a capacitor 146 of 100 pF, a coil 147 of 0.22 μH,
The resistance 149 is 75 kΩ, the resistance 150 is 50 Ω, and the capacitance is 15
1 is 15 pF, coil 152 is 0.22 μH, capacitance 15
3 is 20 pF, and the coil 154 is 0.15 μH.

The capacitance 151 and the coil 1 of the combining circuit of FIG.
The filter whose impedance is low at the frequency of the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast and whose impedance is high at the frequency near the high frequency band VHF _H of the VHF television broadcast due to the series connection of 52,
The circuit of the filter shown in FIG.
A filter formed by parallel connection of a capacitor 153 and a coil 154, the impedance of which increases at a frequency in the low frequency band VHF _L of the VHF television broadcast from the FM radio broadcast band, and decreases at a frequency higher than the vicinity of the high frequency band VHF _H of the VHF television broadcast. Can be a circuit of the filter shown in FIG.

FIG. 7A shows that the series connection of the capacitor 155 and the coil 156 connected to the input terminal T ₁ , the series connection of the capacitor 159 and the coil 160 is connected to the output terminal S _1, and And the coil 156 in series and the capacity 1
A parallel connection of the coil 157 and the capacitor 158 is connected between an intermediate connection point between the series connection of the coil 59 and the coil 160 and the ground potential. A signal having a frequency in the low frequency band VHF _L of the FM radio broadcast band to the VHF television broadcast. The series connection of the capacitor 155 and the coil 156 and the series connection of the capacitor 159 and the coil 160 resonate in series, respectively, and the coils 157 and 158 Are selected to have a value that causes parallel resonance.

FIG. 11B shows the parallel connection of the coil 161 and the capacitor 162 connected to the input terminal T ₂ ,
And the capacitor 166 are connected in parallel and connected to the output terminal S _{2. The} coil is connected between the parallel connection of the coil 161 and the capacitor 162 and the intermediate connection point between the parallel connection of the coil 165 and the capacitor 166 and the ground potential. 163 and the capacitor 164 are connected in series. A signal having a frequency in the low frequency band VHF _L of the VHF television broadcast from the FM radio broadcast band, and the coil 161
The parallel connection of the capacitor 162 and the capacitor 162 and the parallel connection of the coil 165 and the capacitor 166 resonate in parallel, and the series connection of the coil 163 and the capacitor 164 is selected to a value that resonates in series.

In the components of the filter circuit shown in FIGS. 8A and 8B, the values of the capacitance and coil connected in series or in parallel are the same as those shown in the example of FIG. Double the capacity,
The coil is about 1/2, and as an example, the capacity is 155, 15
9, 164 are 30 pF, coils 156, 160, 163
Is 0.12 μH, and coils 157, 161 and 165 are 0.1 μH.
082 μH and capacitances 158, 162, 166 are 39 pF.

The dimensions of the antenna pattern shown in FIG. 5 are, for example, such that the horizontal conductor lines 111 and 114 of the antenna pattern in the upper central portion of the defogger pattern are 53 cm, 11 cm.
2 and 115 are 25 cm, 111 and 112, 114 and 1
15 are 3 cm, the distance between 111 and 114 and the first horizontal conductor line 2 of the defogger pattern is 3 cm, and the vertical conductor lines 113 and 116 are 5.
3 cm, the interval between 113 and 116 is 3 cm, the vertical conductor line 118 is 3 cm, and the antenna pattern in the lower central part of the defogger pattern is 53 cm in horizontal conductor lines 8 and 12 as in the examples of FIGS. , 9 and 13 are 25cm,
The spacing between the conductor lines 8 and 9, 12 and 13 is 3 cm, 8,
The distance between 12 and the bottom horizontal conductor line of the defogger pattern is 3 cm, the vertical conductor lines 10 and 14 are 6.5 cm, the distance between 10 and 14 is 3 cm, and the upper right side of the defogger pattern The horizontal conductor line 120 of the antenna pattern of the portion is 20 cm, the interval between 120 and the first conductor line 2 of the defogger pattern is 6 cm, and the horizontal conductor line 122 of the antenna pattern on the upper left side of the defogger pattern is provided. Is 20 cm, the distance between 122 and the first conductor line 2 of the defogger pattern is 6 cm, the vertical conductor line 123 is 3 cm, the distance between 123 and the glass side is 3 cm, and the common electrode 3 of the defogger pattern is The distance between the connected vertical conductor wire 108 and the glass side is 2.6 cm, and the distance between the horizontal conductor wire 109 and the glass upper side is 2.6 c. It is.

The glass antenna for an automobile according to the present invention described in the first to fourth embodiments is provided at the upper and lower central portions of the defogger pattern or at the upper right and left sides.
Low frequency band VH from FM radio broadcasting band to VHF television broadcasting
A quarter of the wavelength in glass of the frequency of the signal in the vicinity F _L
, The length of 1 / 6.2 of the wavelength in the air, the low frequency band VHF _L , U of the FM radio broadcast band to the VHF television broadcast
The conductor wire of the antenna pattern having high sensitivity in the HF television broadcasting band is selected to have a length of, for example, 53 to 39 cm. In addition, a signal having a frequency near the high frequency band VHF _H of VHF television broadcasting has a length of 1/4 of a wavelength in glass, a length of 1 / 6.2 of a wavelength in air, or a vicinity of a UHF television broadcasting band. 3/4 of the wavelength of the signal at a certain frequency in the glass,
The conductor wire of the antenna pattern having a length of 3 / 6.2 of the wavelength in the air and having high sensitivity in the VHF television broadcasting band and the UHF television broadcasting band is selected to have a length of, for example, 25 to 15 cm.

In the configuration in which the VHF television broadcasting band and the UHF television broadcasting band have high sensitivity, and the horizontal conductor is connected to the power supply terminal by a vertical conductor parallel to the glass side near the window frame of the vehicle body, the horizontal Is longer than the vertical conductor, and the length of the horizontal conductor plus the vertical conductor can be selected to be, for example, 32 to 15 cm.

The defogger pattern for receiving the AM radio broadcast band is shown in FIG. 9 in addition to the defogger pattern in the shape of a day shown in FIGS. 1 and 3 and the defogger pattern in the shape of a rice pad shown in FIGS. 4 and 5. The U-shaped defogger pattern may be used. In FIG. 4, the vertical common conductor lines arranged on the upper right and left sides in the defogger pattern may be arranged on one of the right and left sides. Good.

[0091]

According to the glass antenna for an automobile of the present invention, the defogger pattern is an antenna for receiving an AM radio broadcast band, and the defogger pattern is provided on the upper and lower central portions, and on the upper right and left side portions. The four antenna patterns arranged are four antennas for diversity reception in the VHF and UHF television broadcasting bands, and two antenna patterns among them are two antennas for diversity reception in the FM radio broadcasting band.

The four antenna patterns having different spatial arrangements on the glass surface of the antenna correspond to の of the wavelength in the glass of the signal of the frequency near the high frequency band of the VHF television broadcast.
The antenna has a length of conductor wire, compensates for different directional characteristics by four, receives VHF and UHF television broadcasting bands with high sensitivity, and receives FM radio broadcasting bands and VHF and UHF television broadcasting bands. , FM radio band to VHF
There is an antenna pattern having a conductor line having a length of 1/4 of the wavelength in the glass of a signal having a frequency near the low frequency band of television broadcasting. The directional characteristics are compensated by two antenna patterns having different spatial arrangements. The radio broadcast band is received with high sensitivity, and it is well received in any direction of the automobile.

The reception signal of the antenna pattern for receiving the FM radio broadcasting band and the VHF and UHF television broadcasting bands and the reception signal of the AM radio broadcasting band of the defogger pattern are arranged near or on the glass on which the antenna pattern is formed. Is input to the circuit of the filtered filter,
It is configured to output reception signals of the M and FM radio broadcasting bands and the VHF and UHF television broadcasting bands.

Since all the received signals are output from the rear window glass surface, each coaxial cable is collectively connected to the receiver so that diversity signal processing is facilitated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a glass antenna for an automobile of the present invention;
FIG. 2 is a configuration diagram of a first embodiment.

FIG. 2 is a circuit diagram of a filter circuit that extracts and combines received signals of a defogger pattern and an antenna pattern.

FIG. 3 is a configuration diagram of a second embodiment of the glass antenna for a vehicle according to the present invention.

FIG. 4 is a configuration diagram of a third embodiment of the glass antenna for a vehicle according to the present invention.

FIG. 5 is a configuration diagram of a fourth embodiment of the glass antenna for a vehicle according to the present invention.

FIG. 6 is a circuit diagram of a circuit for synthesizing a reception signal of the defogger pattern and the antenna pattern of FIG. 5;

FIG. 7 is a circuit diagram of another combination circuit of the reception signals of the defogger pattern and the antenna pattern of FIG. 5;

FIG. 8 is a circuit diagram of each filter shown in FIGS. 7A and 7B used in the synthesis circuit of FIG.

FIG. 9 is a configuration diagram of a conventional automobile glass antenna.

[Explanation of symbols]

1: Rear window glass of automobile 2: Conductor line of defogger 3, 4: Common electrode 5, 6: Horizontal conductor line of antenna pattern in upper central part of defogger pattern 7: Antenna pattern of upper central part of defogger pattern Feeding terminals 8, 9, 12, 13: horizontal conductor lines of the antenna pattern in the lower central part of the defogger pattern 10, 14: vertical conductor lines of the antenna pattern in the lower central part of the defogger pattern 15: defogger pattern Feeder terminals of lower central antenna pattern 16, 17: Horizontal conductor line of upper right side antenna pattern of defogger pattern 18: Vertical conductor of upper right side antenna pattern of defogger pattern Line 19: Feeding terminals of the antenna pattern on the upper right side of the defogger pattern 20, 21: Horizontal conductor line of the antenna pattern on the upper left side of the fogger pattern 22: Vertical conductor line of the antenna pattern on the upper left side of the defogger pattern 23: Antenna pattern on the upper left side of the defogger pattern Power supply terminal 24: choke coil circuit 25, 27: power supply line connected to one of the two terminals of the choke coil 29, 30: power supply line 26, 35, 44, 48 connected to the other two terminals of the choke coil : A connection point with the vehicle body 28: Switch 31, 32: A coil which self-resonates at a frequency higher than the frequency near the low frequency of the FM radio broadcast band and lower than the high frequency band of the VHF television broadcast 33, 34: One end of the coaxial cable 36 Signal lines from each internal conductor, ground lines from external conductors 37, 38: Signal from each internal conductor at one end of coaxial cable 39 Signal lines from the outer conductor 40: a filter circuit for extracting and combining received signals of the defogger pattern and the antenna pattern 41, 42: an input signal line of the circuit 40 43: a signal line from the inner conductor to the output of the circuit 40 grounding wire from one end of the outer conductor of the coaxial cable 45 connected to 46 and 47: signal lines from the inner conductor of one end of the coaxial cable 49, ground lines X ₁ from the outer _{conductor, X 2, Y 1, Y} 2 : Received signal GND: Ground potential V _DD : DC power supply potential

Claims (1)

[Claims] 1. A vehicle equipped with a rear window glass of a vehicle.
A defogger pattern consisting of a plurality of parallel conductor lines connecting the common electrodes at both end portions, and an antenna pattern provided at the upper central portion, lower central portion, upper right portion or upper left portion of the defogger pattern There is a conductor line having a length of 1/4 of the wavelength in the glass of the frequency signal near the low frequency band of the VHF television broadcast from the FM radio broadcast band and the signal of the frequency near the high frequency band of the VHF television broadcast. An antenna pattern having two conductor lines, a conductor line having a length of 1/4 of the wavelength in the glass; and an upper central part, a lower central part, an upper right part, or an upper left part of the defogger pattern. An antenna pattern to be provided, the antenna pattern having a conductor line having a length of 1/4 of the wavelength in glass of a signal having a frequency near the high frequency band of VHF television broadcasting. Glass antenna for an automobile according to claim.