KR200289602Y1 - Glass antenna for automobiles - Google Patents

Abstract

The present invention relates to a glass antenna for a vehicle that performs feeding of the FM antenna in the center of the FM antenna attached to the heating wire, the configuration of an embodiment according to the present invention is applied to the DC power supply of 12V through the DC power supply terminal (heating wire B +) A power supply unit (not shown) for supplying the hot wire unit 1; An FM antenna formed on an antenna pattern attached by using the hot wire unit 1; An AM antenna formed on top of the FM antenna; At least one second branch line (2, 3) formed in the vertical direction inside the FM antenna and the AM antenna and movable in a left or right direction in each antenna when the antenna is manufactured; A first choke coil (L1) for filtering the supplied DC power to the heating wire unit (1); A first feed point 21 formed at the center of the FM antenna to feed radio waves received from the FM antenna; A second feed point (22) extending to the right from the first feed point (21) to supply the electric wave fed by the first feed point (21) to a second condenser (C2); A first condenser (C1) for filtering the radio wave received through the AM antenna and applying it to the amplifier; A second condenser (C2) for filtering the radio wave supplied by the second feed point (22) and applying it to the amplifier; And a second choke coil L2 for removing noise on the ground plane of the vehicle corresponding to the ground of the heating wire unit 1.

Description

Glass antenna for vehicle {GLASS ANTENNA FOR AUTOMOBILES}

The present invention relates to a vehicular glass antenna, and more particularly, to a vehicular glass antenna for feeding the FM antenna at the center of the FM antenna attached to the hot wire.

Typically, an automobile is provided with an antenna for receiving airwaves for radio broadcast reception and the like. The glass antenna, which is one of the receiving antennas, is installed in the window glass of the vehicle, and a thin wire antenna is inserted into the middle layer (between the upper and lower laminated glass) of the window glass constituting the window of the vehicle according to the installation method, There is a method of printing conductor lines on the inner surface of the window glass.

With reference to FIG. 1, a glass antenna for a vehicle that is conventionally used will be described.

The conventional vehicle glass antenna includes an FM antenna attached to the heating wire part 1 formed horizontally and vertically on a car glass, and an AM antenna formed horizontally and vertically on an upper end of the heating wire part 1 to which the FM antenna is attached. consist of.

Particularly, branch wires 2 and 3 are vertically formed in the FM antenna and the AM antenna, respectively, and a 12 V DC power supply is provided in the heating wire part 1 via a power input port (heat wire B +) and a choke coil L1. Is applied.

In addition, the antenna output signals respectively received through the AM antenna and the FM antenna are input to the amplifier in the amplifier A via the capacitors C1 and C2 connected on the path, respectively, and the AM and FM output from the amplifier. The signal is applied to the signal output terminal.

In such a vehicle glass antenna, attempts to improve the directionality of the antenna, the reception efficiency of the antenna, and the like continue to be performed.

The present invention has been made in view of the above-described trend, and an object of the present invention is to provide a glass antenna for a vehicle having improved directionality and impedance matching by feeding the FM antenna at the center of the FM antenna attached to the hot wire.

In addition, another object of the present invention is to provide a vehicle glass antenna which minimizes the number of lines required by combining the transmission line of the electric wave received from the FM antenna and the power input line of the heating wire unit as one line.

1 illustrates a conventional vehicle glass antenna,

2 and 3 show the configuration of the first and second embodiments to which the vehicle glass antenna according to the present invention is applied.

<Explanation of symbols for the main parts of the drawings>

1: Hot wire part 2, 3: 2nd branch wire

5: first branch line 4: extension line

6: noise filter 7: amplifier

21: first feed point 22: second feed point

C1, C2, C3, C4: Condenser L1, L2, L3, L4: Choke Coil

As one embodiment of the present invention for achieving the above object, the present invention, in the vehicle glass antenna attached to the antenna pattern using a heating wire formed horizontally and vertically on the glass of the vehicle, is formed on the antenna pattern and external propagation It provides a glass antenna for a vehicle comprising a receiving antenna receiving a feed point formed in the center of the antenna pattern.

In addition, the present invention, the receiving antenna is connected to one side of the first path, and further includes a power supply for supplying a DC power to the heating wire through the first path, the received external radio waves via the first path Is output through the 1-1 path branched from the first path, and the DC power is input through the 1-2 path branched from the first path, and then supplied to the hot wire via the first path. The above-mentioned problem is solved as a vehicle glass antenna characterized by the above-mentioned.

The present invention also solves the problems described above as a vehicle glass antenna, characterized in that it further comprises a DC power filter means for filtering the input DC power in the first and second paths.

In addition, the present invention solves the above-described problem as a vehicle glass antenna, characterized in that the first branch line is further formed in the vertical direction at the upper left and right ends of the antenna pattern.

In addition, the present invention, at least one or more second branch line is further formed in the vertical direction inside the antenna pattern, the position of the second branch line is characterized in that the antenna is moved in the left or right direction inside the antenna pattern during fabrication. The above-described problem is solved as a vehicle glass antenna.

In addition, the present invention solves the above-described problems as a glass antenna for a vehicle, characterized in that an extension line is further formed in a horizontal direction at the end of the second branch line.

These objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

As shown in FIG. 2, the first embodiment to which the vehicle glass antenna according to the present invention is applied includes a power supply unit supplying DC power of 12V to the heating wire unit 1 through a DC power supply terminal (heat wire B +). Shown); An FM antenna formed on an antenna pattern attached by using the hot wire unit 1; An AM antenna formed on top of the FM antenna; At least one second branch line (2, 3) formed in the vertical direction inside the FM antenna and the AM antenna and movable in a left or right direction in each antenna when the antenna is manufactured; A first choke coil (L1) for filtering the supplied DC power to the heating wire unit (1); a first feed point (21) formed at the center of the FM antenna to feed radio waves received from the FM antenna; A second feed point (22) extending to the right from the first feed point (21) to supply the electric wave fed by the first feed point (21) to a second condenser (C2); A first condenser (C1) for filtering the radio wave received through the AM antenna and applying it to the amplifier; A second condenser (C2) for filtering the radio wave supplied by the second feed point (22) and applying it to the amplifier; And a second choke coil L2 for removing noise on the ground plane of the vehicle corresponding to the ground of the heating wire unit 1.

First, when 12V DC power is applied to the first choke coil L1 from the power supply unit (not shown) through the DC power supply terminal (heat wire B +), the applied DC power is the first choke coil L1. After the filter is applied to the hot wire portion (1). Then, the heating wire unit 1 is heated by the applied DC power.

At the same time, the radio wave received through the FM antenna attached to the hot wire unit 1, that is, the FM signal is fed by the first feed point 21 formed at the center of the FM antenna, and the fed FM signal is fed to the second feed point. It is applied to the second capacitor C2 via (22).

Subsequently, the applied FM signal is filtered by the second condenser C2 and then applied to the amplifier.

On the other hand, the amplifying unit amplifies the applied FM signal and the AM signal received from the AM antenna formed on the top of the FM antenna via a first capacitor (C1) by a predetermined magnitude and then applies it to the signal output terminal.

In addition, the second branch line 2 formed in the vertical direction inside the FM antenna is movable left or right, thereby tuning the impedance and non-directionality of the antenna.

The second branch line 3 formed in the vertical direction inside the AM antenna can also be moved left or right, thereby improving the impedance coupling and directivity of the antenna and widening the frequency band.

In addition, in the second embodiment to which the vehicle glass antenna according to the present invention is applied, as shown in FIG. 3, in addition to the first and second feed points 21 and 22, the 12V may be provided through a DC power supply terminal (heating line B +). A power supply unit (not shown) for supplying DC power; A noise filter (6) for removing noise from the supplied DC power source; An FM antenna formed on an antenna pattern attached by using the heating wire unit 1 connected to one side of the first path; First branch lines 5 formed in vertical directions at upper left and right ends of the FM antenna; An AM antenna formed on top of the FM antenna; At least one second branch line (2, 3) formed in the vertical direction inside the FM antenna and the AM antenna and movable in a left or right direction in each antenna when the antenna is manufactured; An extension line 4 formed in a horizontal direction at a lower end of the second branch line 2 formed on the FM antenna; Third and fourth condensers C3 and C4 for filtering the radio waves received through the AM antenna and the FM antenna and applying them to the amplifier 7; The electric wave received by the noise filter 6 in the forward direction through the first path through the noise removed by the noise filter 6, and received in the reverse direction via the first and second feed points 21 and 22 and the first path. A third choke coil L3 to be applied to the fourth capacitor C4 on the path 1-1; And a fourth choke coil L4 for removing noise from the ground plane of the vehicle corresponding to the ground of the heating wire unit 1.

Therefore, when 12V DC power is applied to the third choke coil L3 through the DC power supply terminal (heat wire B +) from the power supply (not shown), the noise filter 6 generates noise from the applied DC power. Next, the DC power source from which the noise is removed is filtered by the third choke coil L3 on the 1-2 path and then applied in the forward direction through the first path. Then, the hot wire portion 1 connected to one side of the first path generates heat by the applied DC power.

At the same time, the radio wave received through the FM antenna attached to the hot wire unit 1, that is, the FM signal, is fed by the first feed point 21 formed at the center of the FM antenna and then to the second feed point 22. The supplied FM signal is inputted in the reverse direction on the first path that is opposite to the forward direction to which the DC power is applied, and then via the fourth capacitor C4 on the 1-1 path branched from the first path. Is applied to the amplifier 7.

On the other hand, the amplifier 7 amplifies the applied FM signal and the AM signal received from the AM antenna formed on the top of the FM antenna via a third condenser C3 to a predetermined magnitude and then outputs the signal output terminal. do. The first branch line 5 increases the area of the FM antenna to improve the reception efficiency and the directionality of the antenna.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

As described above, the present invention has an effect of increasing the directionality and reception efficiency of the antenna by feeding the FM antenna at the center of the FM antenna attached to the hot wire.

In addition, the present invention has the effect of reducing the manufacturing process and manufacturing cost by combining the feed line of the FM antenna and the power input line of the heating wire as a single line.

Claims (8)

In the vehicle glass antenna which is attached to the antenna pattern using a heating wire formed horizontally and vertically on the glass of the vehicle, And a receiving antenna formed on the antenna pattern to receive external radio waves and having a feed point formed at the center of the antenna pattern. The method of claim 1, The receiving antenna is connected to one side of the first path, The apparatus may further include a power supply unit configured to supply DC power to the heating wire through the first path, wherein the received external radio wave is output as a 1-1 path branched from the first path via a first path. The power is input through the 1-2 path branched from the first path and the vehicle glass antenna, characterized in that supplied to the hot wire via the first path. The method of claim 2, The vehicle glass antenna of claim 1, further comprising a direct current power filter means for filtering the input direct current power. The method according to any one of claims 1 to 3, Vehicle antennas, characterized in that the first branch line is further formed in the vertical direction at the upper left and right ends of the antenna pattern. The method according to any one of claims 1 to 3, At least one second branch line is further formed inside the antenna pattern in a vertical direction, and the position of the second branch line is moved to the left or right direction inside the antenna pattern when the antenna is manufactured. The method of claim 5, The glass antenna for a vehicle, characterized in that the extension line is further formed in the end of the second branch line in the horizontal direction. The method of claim 4, wherein At least one second branch line is further formed inside the antenna pattern in a vertical direction, and the position of the second branch line is moved to the left or right direction inside the antenna pattern when the antenna is manufactured. The method of claim 7, wherein The glass antenna for a vehicle, characterized in that the extension line is further formed in the end of the second branch line in the horizontal direction.