KR20010055310A - Pane antenna - Google Patents

Abstract

PURPOSE: A glass antenna is provided to form the glass antenna having a prominent frequency characteristic by improving a structure of the glass antenna. CONSTITUTION: A second upper element(212) is divided into the first, the second, and the third upper sub-elements(212a,212b,212c). The third upper element(213) is divided into the fourth and the fifth sub-elements(213a,213b). The first stage of the fifth sub-upper element(213b) is connected with a feed terminal(23). The second stage of the fifth sub-upper element(213b) is connected with the first stage of the second upper sub-element(212b) through the first conductor(24a). The second stage of the second upper sub-element(212b) is connected with the first upper element(211) through the second conductor(24b). The first lower element(221) and the second lower element(222) are connected with the second connection point(P2). The second connection point(P2) and the feed terminal(23) are connected with the third conductor(25).

Description

Glass Antenna {PANE ANTENNA}

TECHNICAL FIELD This invention relates to the glass antenna which can be attached to the window glass of automobiles etc., for example.

In addition to the rod antenna widely used for receiving AM waves, FM waves, and the like, there are antennas (hereinafter referred to as "glass antennas") mounted on the window glass of an automobile as shown in FIG. This glass antenna is comprised by melt | dissolving a predetermined pattern conductor inside the vehicle body of window glass. 1 is a diagram showing a pattern configuration of a glass antenna for AM / FM. In addition, in FIG. 1, the case where a glass antenna is arrange | positioned, for example in the rear window of a motor vehicle is assumed.

In FIG. 1, the heating wire 1 and the antenna element 2 are provided in the rear window. And the directivity of the antenna element 2 is made high by capacitive coupling of the heating wire 1 and the antenna element 2 by predetermined interval d. In addition, the noise filter 11 is provided in the heating wire 1, and the noise generated in the heating wire 1 is removed by this noise filter 11.

The antenna element 2 has a lower portion having first to second lower elements 221 and 222 disposed in parallel with the upper element portion 21 having first to third upper elements 211 to 213 arranged in parallel. The element part 22 is comprised. The first to third upper elements 211 to 213 are connected at the first point P1. The first and second lower elements 221 and 222 are connected at the second point P2. The upper element portion 21 and the lower element portion 22 connected in this manner are connected to the power supply terminal 23, respectively.

In such an antenna element, the phase adjustment of the voltage is performed by changing the element length L in the upper element portion 21 and the lower element portion 22. In this case, the element length L is the length from the first point P1 and the second point P2 to the respective element ends, and the first to third upper elements 211 to 213 and the first and second lower elements 221 and 222 are formed. The lengths are all the same. However, if various adjustments are made by changing only the element length L in this manner, the following problem occurs.

(1) When the element length L is adjusted, the AM capacitance is lowered because the coupling capacitance between the heating wire 1 and the second lower element 222 close to the heating line in the lower element portion 22 is greatly changed.

(2) When the element length L is shortened by adjustment, it becomes difficult to make both AM and FM characteristics compatible.

(3) It is difficult to obtain excellent frequency characteristics when phase matching the voltages obtained by the upper element portion 21 and the lower element portion 22 to a length of only the element length L is desired.

As described above, in the conventional antenna element, there are problems such as a decrease in AM sensitivity, difficulty in achieving compatibility between AM and FM characteristics, or difficulty in obtaining excellent frequency characteristics.

An object of the present invention is to provide a glass antenna that is easy to adjust and has excellent frequency characteristics.

1 is a view showing a schematic configuration of a conventional glass antenna,

2 is a diagram showing a pattern example of a glass antenna according to the present invention;

3 is a diagram showing another pattern example of the glass antenna according to the present invention;

Explanation of symbols for the main parts of the drawings

1: heating wire 2: antenna element

21: upper element portion 22: lower element portion

23: power supply terminal 25: conductor

The glass antenna of the present invention has an upper element portion having at least three first to third upper elements arranged almost in parallel, and a lower element portion having at least two first and second lower elements arranged almost in parallel. And a glass antenna arranged such that at least a portion of the heating wire is capacitively coupled to the second lower element at a predetermined interval, wherein the upper element portion and the lower element portion are fed to the upper element portion and the lower element portion. A feed terminal for extracting a received signal from a negative portion, a first conductor connecting the first end of the first upper element and the second upper element, a second end of the second upper element, and a third upper element A second conductor connecting the first end, a connection point to which the first lower element and the second lower element are connected, and a third conductor connecting the power supply terminal; A second end of the secondary element is connected to the feed terminal, and the reception characteristic is adjusted by changing the length of the second upper element and the length of the third conductor. By changing only the length of the second upper element and the length of the third conductor, the phase matching of the voltages obtained in the upper element portion and the lower element portion is performed. Is improved. Since only changing the length of the third conductor is more effective than adjusting the entire length, the coupling capacitance between the lower element and the heating wire is not reduced, so that the AM sensitivity can be maintained. In addition, by adjusting the distance between the first connection point and the second connection point, the sensitivity obtained in the upper element is not lowered.

Therefore, according to the present invention, even when the lateral dimension of the rear glass and the longitudinal dimension that the antenna can occupy are different for each vehicle type, the antenna is mounted with the first connection point. Only by changing the distance from the second connection point and the length of the third conductor can be adjusted to obtain the optimum reception characteristics easily. Therefore, according to the present invention, tuning is easily performed in almost all vehicle types.

The glass antenna further includes fourth and fifth conductors provided at the first end side and the second end side of the second upper element, and a sixth conductor provided at the first end side of the third upper element, respectively. It is done. The first end of the second upper element is connected to the fourth conductor, and the first end of the third upper element is connected to the sixth conductor. Even if the fourth to sixth conductors are further provided, the appearance is not impaired.

In each of the glass antennas, at least one TV antenna element and a power feeding terminal for a TV antenna element which feeds power to the TV antenna element and outputs signals from the upper element portion and the lower element portion are further added. Characterized in that provided. An antenna for receiving TV waves can be provided without impairing the reception characteristics of AM and FM waves.

The above and other objects, features, aspects, advantages, and the like of the present invention will become more apparent from the following detailed embodiments described with reference to the accompanying drawings.

Hereinafter, the present invention will be described with reference to the drawings.

2 is a diagram showing a pattern example of a glass antenna according to the present invention. 2, the same code | symbol is attached | subjected to the same part as FIG. The present invention is characterized by the pattern of the glass antenna.

In FIG. 2, since the position and the structure of FIG. 1 are the same as that of FIG. 1, the heating wire 1 is abbreviate | omitted. In FIG. 2, according to the present invention, the structure of the lower element portion 22 is almost the same as in the prior art, but has a feature in the structure of the upper element 21. In FIG. That is, conventionally, the first to third upper elements 211 to 213 are connected to the feed terminal 23 by connecting at the first point P1, but according to the present invention, the third upper element 213 is connected to the feed terminal 23. Only the direct connection is made.

Specifically, the second upper element 212 is divided into three to form the first to third sub upper elements 212a to 212c, and the third upper element 213 is divided into two to form the fourth and fifth portions. It consists of negative upper elements 213a and 213b. Here, the first end of the fifth sub upper element 213b is connected to the feed terminal 23, and the second end upper element 212b is connected to the power supply terminal 23 via the first conductor 24a. Is connected to the first stage. The second end of the second upper upper element 212b is connected to the first upper element 211 via the second conductor 24b. In this structure, although the connection point of the 2nd conductor 24b and the 1st upper element 211 becomes substantially center of the upper element 211 in FIG. 2, if it is not limited to the center and connected in arbitrary positions, It's okay.

And about the lower element part 22, the 1st lower element 221 and the 2nd lower element 222 are connected at the 2nd connection point P2, and the 2nd connection point P2 and the feed terminal 23 are 3rd conductors ( 25).

In the above configuration, in the present invention, the length L1 of the third conductor and the length L2 of the second upper part element 212b are adjusted to obtain the upper element part 21 and the lower element part 22. Phase matching of the voltage is performed. Therefore, the following effects can be obtained.

By changing only the length of the third conductor L1 and the length L2 of the second upper upper element 212b, the phase matching of the voltages obtained in the upper element portion 21 and the lower element portion 22 is adjusted. Since the phase matching of the voltage can be easily performed, the frequency characteristic is improved. In addition, since only changing the length of the third conductor is more effective than adjusting the entire length, the coupling capacitance between the lower element and the heating wire is not reduced, and thus the AM sensitivity can be maintained. In addition, by adjusting the distance between the first connection point and the second connection point, the sensitivity obtained in the upper element is not lowered.

In addition, in the said structure, although the 1st upper part element 212a, the 3rd upper part element 212c, and the 4th upper part element 213a can be omitted, in appearance, It is more preferable to provide in order to balance. In the above embodiment, the second and third upper elements 212 and 213 are divided, but the present invention is not limited thereto, and the second and third upper elements 212b and 212c are connected to each other. The first and fifth upper elements 213a and 213b may be connected to each other.

In addition, the antenna for receiving TV waves may be added to the glass antenna of FIG. 2. This example is shown in FIG. 3 is a diagram showing another pattern example of the glass antenna according to the present invention. 3, the same code | symbol is attached | subjected to the same part as FIG. 2, and the description is abbreviate | omitted.

FIG. 3 is a pattern example in which an antenna for receiving TV waves is further added in FIG. 2. As is apparent from FIG. 3, the antenna 3 for TV waves is added to the pattern of FIG. Therefore, also in this case, it is possible to improve the frequency characteristics for the AM wave and the FM wave similarly to the above embodiment.

If the antenna element for receiving AM and FM waves is the same pattern as the above embodiment, the present invention is not limited to the above embodiment and can be modified in various ways.

According to the present invention, even when the lateral dimension of the rear glass or the longitudinal dimension that the antenna can occupy differs for each vehicle type, for example, the first connection point and the first It is possible to easily adjust the optimum reception characteristics simply by changing the distance to the two connection points and the length of the third conductor. Therefore, according to the present invention, tuning can be facilitated in almost all vehicle types.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

Claims (4)

An upper element portion having at least three first to third upper elements disposed substantially in parallel, and a lower element portion having at least two first and second lower elements disposed substantially in parallel, wherein at least a portion of the heating wire is A glass antenna arranged to capacitively couple a second lower element at a predetermined interval, A feed terminal for feeding power to the upper element portion and the lower element portion, and outputting a received signal from the upper element portion and the lower element portion; A first conductor connecting the first end of the first upper element and the second upper element; A second conductor connecting the second end of the second upper element and the first end of the third upper element; A third conductor connecting the connection point to which the first lower element and the second lower element are connected, and the feed terminal; A second end of the third upper element is connected to the feed terminal; A glass antenna, characterized in that the reception characteristics are adjusted by varying the length of the second upper element and the length of the third conductor. The method of claim 1, And a fourth and fifth conductors provided at the first end side and the second end side of the second upper element, respectively, and a sixth conductor provided at the first end side of the third upper element. The method of claim 2, And the first end of the second upper element is connected to the fourth conductor, and the first end of the third upper element is connected to the sixth conductor. The method according to any one of claims 1 to 3, A glass antenna further comprising a feed terminal for a TV antenna element which simultaneously feeds at least one TV antenna element and said TV antenna element and outputs signals from said upper element portion and said lower element portion.