JP2010263646A - High frequency wave glass antenna for automobile - Google Patents

High frequency wave glass antenna for automobile Download PDF

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JP2010263646A
JP2010263646A JP2010157903A JP2010157903A JP2010263646A JP 2010263646 A JP2010263646 A JP 2010263646A JP 2010157903 A JP2010157903 A JP 2010157903A JP 2010157903 A JP2010157903 A JP 2010157903A JP 2010263646 A JP2010263646 A JP 2010263646A
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antenna
side feeding
feeding electrode
antenna conductor
glass plate
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Satoshi Funatsu
聡史 船津
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AGC Inc
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Asahi Glass Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a high frequency wave glass antenna for an automobile, which enhances transmission efficiency. <P>SOLUTION: The high frequency wave glass antenna for an automobile includes: an antenna conductor 3 and an antenna-conductor-side feeding electrode 2 connected to the antenna conductor 3, which are provided between laminated window glass plates for an automobile formed by bonding two glass plates through a bonding layer; and a receiver-side feeding electrode 1 disposed on a car-interior-side surface of the laminated window glass plates and on a surface facing the antenna-conductor-side feeding electrode 2. In the antenna, a received carrier frequency ranges from 450 to 806 MHz, and the antenna-conductor-side feeding electrode 2 and the receiver-side feeding electrode 1 have areas of 360 to 900 mm<SP>2</SP>. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、デジタルテレビ放送（４７０〜７０４ＭＨｚ）、ＵＨＦのテレビ放送（４５０〜７５０ＭＨｚ）又は米国のデジタルテレビ放送（６９８〜８０６ＭＨｚ）の受信に適する自動車用高周波ガラスアンテナに関する。   The present invention relates to an automotive high-frequency glass antenna suitable for receiving digital television broadcasts (470 to 704 MHz), UHF television broadcasts (450 to 750 MHz), or US digital television broadcasts (698 to 806 MHz).

自動車の合せ窓ガラス板は２枚のガラス板を合成樹脂製の中間膜を介して接着することよりなる。従来、この合せ窓ガラス板の内部側の接着面にアンテナ導体を設け、この合せ窓ガラス板の車内側の面上であってアンテナ導体側給電電極に対向する箇所に受信機側給電電極が設けられている自動車用高周波ガラスアンテナが報告されている（例えば、特許文献１参照）。   A laminated window glass plate of an automobile is formed by adhering two glass plates through a synthetic resin intermediate film. Conventionally, an antenna conductor is provided on the adhesive surface on the inner side of the laminated window glass plate, and a receiver-side feeding electrode is provided on the inner surface of the laminated window glass plate on the side facing the antenna conductor-side feeding electrode. A high-frequency glass antenna for automobiles has been reported (for example, see Patent Document 1).

しかし、特許文献１には、アンテナ導体側給電電極の寸法及び受信機側給電電極の寸法について、具体的に記載されてなく、この従来例をデジタルテレビ放送又はＵＨＦのテレビ放送に利用する手段が不明である問題があった。   However, Patent Document 1 does not specifically describe the dimensions of the antenna conductor-side feeding electrode and the receiver-side feeding electrode, and means for using this conventional example for digital television broadcasting or UHF television broadcasting. There was a problem that was unknown.

特開昭６１−３０１０２号公報（第６図）JP 61-30102 A (FIG. 6)

本発明は、従来技術の有する前述の欠点を解消する自動車用高周波ガラスアンテナの提供を目的とする。   An object of the present invention is to provide a high-frequency glass antenna for an automobile that eliminates the above-mentioned drawbacks of the prior art.

本発明は、接着層を介して接着される２枚のガラス板を備える自動車用の合せ窓ガラス板における該２枚のガラス板の間に、アンテナ導体及び該アンテナ導体に接続されたアンテナ導体側給電電極が設けられているとともに、
該合せ窓ガラス板の車内側の面上であってアンテナ導体側給電電極に対向する箇所に受信機側給電電極が設けられている自動車用高周波ガラスアンテナにおいて、
アンテナ導体側給電電極の面積及び受信機側給電電極の面積が、それぞれ４９〜２５００ｍｍ２であることを特徴とする自動車用高周波ガラスアンテを提供する。 The present invention relates to an antenna conductor and an antenna conductor side feeding electrode connected to the antenna conductor between the two glass plates in a laminated window glass plate for an automobile having two glass plates bonded through an adhesive layer. Is provided,
In the automotive high-frequency glass antenna in which the receiver-side power supply electrode is provided at a location facing the antenna conductor-side power supply electrode on the inner surface of the laminated window glass plate,
Provided is an automotive high-frequency glass antenna characterized in that an antenna conductor side feeding electrode area and a receiver side feeding electrode area are 49 to 2500 mm 2 , respectively.

また、接着層を介して接着される２枚のガラス板を備える自動車用の合せ窓ガラス板における該２枚のガラス板の間に、アンテナ導体及び該アンテナ導体に接続されたアンテナ導体側給電電極が設けられているとともに、
該合せ窓ガラス板の車内側の面上であってアンテナ導体側給電電極に対向する箇所に受信機側給電電極が設けられている自動車用高周波ガラスアンテナにおいて、
前記受信機側給電電極及び車体開口縁の最短の間隔が、１．８〜５０．０ｍｍであることを特徴とする自動車用高周波ガラスアンテナを提供する。 In addition, an antenna conductor and an antenna conductor side feeding electrode connected to the antenna conductor are provided between the two glass plates in a laminated window glass plate for an automobile having two glass plates bonded through an adhesive layer. As well as
In the automotive high-frequency glass antenna in which the receiver-side power supply electrode is provided at a location facing the antenna conductor-side power supply electrode on the inner surface of the laminated window glass plate,
Provided is a high frequency glass antenna for an automobile, wherein a shortest interval between the receiver side feeding electrode and a vehicle body opening edge is 1.8 to 50.0 mm.

本発明では上記構成を採ったので、アンテナ導体側給電電極から受信機側給電電極へ送られる受信信号の伝送効率に優れ、デジタルテレビ放送又はＵＨＦのテレビ放送を感度よく、良好に受信できる。   Since the present invention adopts the above configuration, it is excellent in transmission efficiency of a received signal sent from the antenna conductor side feeding electrode to the receiver side feeding electrode, and can receive digital television broadcasting or UHF television broadcasting with good sensitivity.

本発明の自動車用高周波ガラスアンテナの一実施例の斜視図。The perspective view of one Example of the high frequency glass antenna for motor vehicles of this invention. 図１に示す実施例のＡ−Ａ断面図。AA sectional drawing of the Example shown in FIG. 図２とは異なる、図１に示す実施例のＡ−Ａ断面図。FIG. 3 is a cross-sectional view of the embodiment shown in FIG. 例１に使用した自動車用高周波ガラスアンテナの擬似的な試験装置の構成図。The block diagram of the pseudo test device of the high frequency glass antenna for motor vehicles used in Example 1. FIG. 例１における、縦軸を伝送効率、横軸をアンテナ導体側給電電極２の面積と対向電極１の面積にした特性図。In Example 1, the vertical axis represents transmission efficiency, and the horizontal axis represents the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1. 例２に使用した自動車用高周波ガラスアンテナの擬似的な試験装置の構成図。The block diagram of the pseudo test device of the high frequency glass antenna for motor vehicles used in Example 2. FIG. 例２における、縦軸を伝送効率、横軸をＬ２にした特性図。In Example 2, it transmits the longitudinal axis efficiency characteristic diagram in which the horizontal axis L 2. 例３における、縦軸を伝送効率、横軸をガラス板の厚さにした特性図。In Example 3, the vertical axis represents transmission efficiency and the horizontal axis represents the thickness of the glass plate. 例４に使用した自動車用高周波ガラスアンテナの擬似的な試験装置の構成図。The block diagram of the pseudo test device of the high frequency glass antenna for motor vehicles used in Example 4. FIG. 例４における、縦軸を伝送効率、横軸をアンテナ導体側給電電極２の面積（対向電極１の面積と同様）にした特性図。In Example 4, the vertical axis represents the transmission efficiency, and the horizontal axis represents the area of the antenna conductor side feeding electrode 2 (similar to the area of the counter electrode 1). 図１０における横軸の０〜１０００ｍｍ２の部分を拡大した特性図。Characteristic view enlarging a portion of 0～1000Mm 2 of the horizontal axis in FIG. 10. 例５における、縦軸を伝送効率（ｄＢ）、横軸をＬ２にした特性図。In Example 5, the vertical axis represents transmission efficiency (dB), and the horizontal axis represents L 2 .

以下、本発明の自動車用高周波ガラスアンテナを添付の図面に示される好適実施例に基づいて詳細に説明する。図１は本発明の自動車用高周波ガラスアンテナの一実施例を示す自動車用高周波ガラスアンテナの斜視図であり、図２，３は図１に示す自動車用高周波ガラスアンテナのＡ−Ａ断面図であって、それぞれ別態様を示している。   Hereinafter, the high frequency glass antenna for automobiles of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. FIG. 1 is a perspective view of a high frequency glass antenna for an automobile showing an embodiment of the high frequency glass antenna for an automobile of the present invention, and FIGS. 2 and 3 are cross-sectional views taken along line AA of the high frequency glass antenna for an automobile shown in FIG. Each shows a different embodiment.

図１，２，３において、１は受信機側給電電極（以下、対向電極という）、２はアンテナ導体側給電電極、３はアンテナ導体、４は車内側ガラス板、５は車外側ガラス板、６は合成樹脂製の中間膜である。なお、図２、３における９は必要に応じて設けられる金属製の端子であり、図１では省略して示されている。また、図１，２，３において、上方が車内側である。   1, 2 and 3, 1 is a receiver-side feeding electrode (hereinafter referred to as a counter electrode), 2 is an antenna conductor-side feeding electrode, 3 is an antenna conductor, 4 is an interior glass plate, 5 is an exterior glass plate, 6 is an intermediate film made of synthetic resin. 2 and 3 are metal terminals provided as necessary, and are omitted in FIG. 1, 2, and 3, the upper side is the vehicle interior side.

本発明における合せ窓ガラス板としては、例えば、２枚のガラス板を合成樹脂製の中間膜６を介して接着することよりなる自動車の合せ窓ガラス板が挙げられる。図１，２，３に示す例では、車内側ガラス板４と車外側ガラス板５とが、車内側ガラス板４と車外側ガラス板５との間に介在している中間膜６によって接着されている。したがって、中間膜６が接着性を有している。   Examples of the laminated window glass plate in the present invention include a laminated window glass plate for an automobile formed by bonding two glass plates through an intermediate film 6 made of synthetic resin. In the example shown in FIGS. 1, 2, and 3, the vehicle interior glass plate 4 and the vehicle exterior glass plate 5 are bonded together by an intermediate film 6 interposed between the vehicle interior glass plate 4 and the vehicle exterior glass plate 5. ing. Therefore, the intermediate film 6 has adhesiveness.

本発明において、アンテナ導体３とアンテナ導体側給電電極２とは、車内側ガラス板４と車外側ガラス板５との間に設けられる。図２に示す例では、アンテナ導体３とアンテナ導体側給電電極２とは、車内側ガラス板４の合せガラス板内部側の接着面に設けられている。図３に示す例では、アンテナ導体３とアンテナ導体側給電電極２とは、車外側ガラス板５の合せガラス板内部側の接着面に設けられている。すなわち、アンテナ導体３とアンテナ導体側給電電極２とが設けられる箇所は、車内側ガラス板４と車外側ガラス板５との間であれば特に限定されず、例えば、アンテナ導体３とアンテナ導体側給電電極２とが中間膜６の中に設けられていてもよく、アンテナ性能が最良になるように適宜定められる。   In the present invention, the antenna conductor 3 and the antenna conductor side feeding electrode 2 are provided between the vehicle inner side glass plate 4 and the vehicle outer side glass plate 5. In the example shown in FIG. 2, the antenna conductor 3 and the antenna conductor side feeding electrode 2 are provided on the bonding surface of the inside glass plate 4 on the inner side of the laminated glass plate. In the example shown in FIG. 3, the antenna conductor 3 and the antenna conductor-side feeding electrode 2 are provided on the bonding surface of the outside glass plate 5 on the inner side of the laminated glass plate. That is, the location where the antenna conductor 3 and the antenna conductor-side feeding electrode 2 are provided is not particularly limited as long as it is between the vehicle interior glass plate 4 and the vehicle exterior glass plate 5. For example, the antenna conductor 3 and the antenna conductor side The feeding electrode 2 may be provided in the intermediate film 6 and is appropriately determined so that the antenna performance is the best.

本発明では、合せ窓ガラス板の車内側の面（車内側ガラス板４の車内側の面）上であってアンテナ導体側給電電極２に対向する箇所に対向電極１が設けられている。このように、アンテナ導体側給電電極２と対向電極１とを対向させることにより、アンテナ導体側給電電極２と対向電極１とが電磁結合及び容量結合の少なくとも一方の結合となり、アンテナ導体３に励起された受信信号がアンテナ導体側給電電極２、対向電極１の順に伝送されて、対向電極１に接続されたケーブル（不図示）により受信機側に送られる。なお、合せ窓ガラス板の車内側の面上に隠蔽膜が設けられている場合には、この隠蔽膜の上の対向電極１を設けてもよい。隠蔽膜の材質は、例えば、セラミックスが挙げられる。   In the present invention, the counter electrode 1 is provided on the surface of the laminated window glass plate on the vehicle inner side (the vehicle inner surface of the vehicle inner glass plate 4) and at the location facing the antenna conductor side feeding electrode 2. Thus, by making the antenna conductor side feeding electrode 2 and the counter electrode 1 face each other, the antenna conductor side feeding electrode 2 and the counter electrode 1 become at least one of electromagnetic coupling and capacitive coupling and are excited by the antenna conductor 3. The received signal is transmitted in the order of the antenna conductor side feeding electrode 2 and the counter electrode 1 and sent to the receiver side by a cable (not shown) connected to the counter electrode 1. In addition, when the masking film is provided on the inner surface of the laminated window glass plate, the counter electrode 1 on the masking film may be provided. An example of the material of the masking film is ceramic.

本発明では、アンテナ導体側給電電極２の面積及び対向電極１の面積が、それぞれ４９〜２５００ｍｍ２である。アンテナ導体側給電電極２の面積及び対向電極１の面積がいずれも４９ｍｍ２以上であると、伝送効率が向上して好ましい。アンテナ導体側給電電極２の面積及び対向電極１の面積がいずれも２５００ｍｍ２以下であると伝送効率が向上するとともに、アンテナ導体側給電電極２の面積及び対向電極１の面積が大きくなりすぎず、視野の確保の点及び美感上の点で好ましい。この理由を向上させるために、アンテナ導体側給電電極２の面積及び対向電極１の面積の範囲を表１に記載する。番号が大きくなるにしたがってこの理由が向上する。 In the present invention, the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1 are 49 to 2500 mm 2 , respectively. It is preferable that the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1 are both 49 mm 2 or more because transmission efficiency is improved. When the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1 are both 2500 mm 2 or less, the transmission efficiency is improved, and the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1 do not become too large. It is preferable in terms of securing a visual field and aesthetics. In order to improve this reason, Table 1 shows the range of the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1. This reason improves as the number increases.

Figure 2010263646
Figure 2010263646

アンテナ導体側給電電極２の面積が対向電極１の面積の０．５〜１．５倍であることが好ましい。この範囲内であると、この範囲外と比較して伝送効率及びコンパクト化が向上する。より好ましい範囲は、０．７〜１．３倍であり、特に好ましい範囲は、０．８〜１．２倍である。なお、図１に示す例では、アンテナ導体側給電電極２の面積が対向電極１の面積と一致又は略一致している。   The area of the antenna conductor side feeding electrode 2 is preferably 0.5 to 1.5 times the area of the counter electrode 1. Within this range, transmission efficiency and compactness are improved as compared to outside this range. A more preferable range is 0.7 to 1.3 times, and a particularly preferable range is 0.8 to 1.2 times. In the example shown in FIG. 1, the area of the antenna conductor side feeding electrode 2 matches or substantially matches the area of the counter electrode 1.

アンテナ導体側給電電極２と受信機側給電電極１との間隔と、アンテナ導体側給電電極２から受信機側給電電極１へ伝送される受信信号の伝送効率との関係については、この伝送効率がこの間隔に応じて極小値及び極大値をとりながら変化する。この現象は、車内側ガラス板４の両面の間で生じる多重反射等に起因するものと思われ、アンテナ導体側給電電極２と受信機側給電電極１との間に中間膜６が介在している場合には、中間膜６の両面の間でも多重反射等が生じるため、中間膜６も影響する。後述する図８にこの現象を示す。   Regarding the relationship between the distance between the antenna conductor side feeding electrode 2 and the receiver side feeding electrode 1 and the transmission efficiency of the received signal transmitted from the antenna conductor side feeding electrode 2 to the receiver side feeding electrode 1, this transmission efficiency is It changes while taking the minimum value and the maximum value according to this interval. This phenomenon is considered to be caused by multiple reflections or the like generated between both surfaces of the vehicle interior glass plate 4, and an intermediate film 6 is interposed between the antenna conductor side feeding electrode 2 and the receiver side feeding electrode 1. In such a case, multiple reflection or the like occurs between both surfaces of the intermediate film 6, so that the intermediate film 6 also has an influence. This phenomenon is shown in FIG.

本発明では、伝送効率がこの極小値の近傍とならないように、この間隔を設定することが好ましい。図８に示す場合では、アンテナ導体側給電電極２と対向電極１との間隔は、１．５０〜２．７２ｍｍ、又は、２．８７ｍｍ〜６．００ｍｍが好ましい。この間隔が１．５０ｍｍ以上であると合せガラス板の強度的に充分となり、この間隔が２．７２ｍｍ以下、又は、２．８７ｍｍ以上であると伝送効率が向上する。また、この間隔が６．００ｍｍ以下であると合せガラス板の厚さが厚くなりすぎず好ましい。   In the present invention, it is preferable to set the interval so that the transmission efficiency is not in the vicinity of the minimum value. In the case shown in FIG. 8, the distance between the antenna conductor side feeding electrode 2 and the counter electrode 1 is preferably 1.50 to 2.72 mm, or 2.87 mm to 6.00 mm. If this distance is 1.50 mm or more, the strength of the laminated glass plate is sufficient, and if this distance is 2.72 mm or less, or 2.87 mm or more, transmission efficiency is improved. Further, it is preferable that the gap is 6.00 mm or less because the laminated glass plate is not too thick.

伝送効率が向上する点で、極大値≧伝送効率≧（１／３）（２×極大値＋極小値）となるように、アンテナ導体側給電電極と前記受信機側給電電極との間隔が設定されることが好ましい。ここで、伝送効率、極大値及び極小値はｄＢ値に換算する値とする。図８に示す場合では、この間隔のより好ましい範囲は、１．５０〜２．４９ｍｍ、又は、４．３６ｍｍ〜６．００ｍｍである。この間隔の特に好ましい範囲は、１．５０〜２．３１ｍｍである。   In order to improve the transmission efficiency, the distance between the antenna conductor side feeding electrode and the receiver side feeding electrode is set so that the maximum value ≧ the transmission efficiency ≧ (1/3) (2 × maximum value + minimum value). It is preferred that Here, the transmission efficiency, the maximum value, and the minimum value are values converted into dB values. In the case shown in FIG. 8, the more preferable range of this distance is 1.50 to 2.49 mm, or 4.36 mm to 6.00 mm. A particularly preferable range of this interval is 1.50 to 2.31 mm.

この間隔は、図２に示す態様では、主にアンテナ導体側給電電極２と対向電極１との間に介在している車内側ガラス板４の厚さである。しかし、図３に示す態様のように、アンテナ導体側給電電極２と対向電極１との間に中間膜６が介在していても、上記した、この間隔の範囲は適用できる。中間膜６の厚さが通常車内側ガラス板４の厚さより薄く、かつ、中間膜６の比誘電率（通常３．０〜４．０）が通常車内側ガラス板４の比誘電率（通常６．０〜７．０）より小さいため、上記間隔の範囲を定めるに当たり、中間膜６介在の影響が小さく、中間膜６の介在を概算で省略できるからである。なお、中間膜６の厚さは、０．３〜１．２ｍｍ、特には、０．５〜０．８ｍｍが好ましい。   In the embodiment shown in FIG. 2, this distance is mainly the thickness of the vehicle interior side glass plate 4 interposed between the antenna conductor side feeding electrode 2 and the counter electrode 1. However, even if the intermediate film 6 is interposed between the antenna conductor side feeding electrode 2 and the counter electrode 1 as shown in FIG. The thickness of the intermediate film 6 is usually smaller than the thickness of the vehicle interior glass plate 4, and the relative dielectric constant of the intermediate film 6 (usually 3.0 to 4.0) is the relative dielectric constant of the vehicle interior glass plate 4 (normally This is because the influence of intervening the intermediate film 6 is small and the intervening of the intermediate film 6 can be roughly omitted when determining the range of the interval. In addition, the thickness of the intermediate film 6 is preferably 0.3 to 1.2 mm, and particularly preferably 0.5 to 0.8 mm.

すなわち、車内側ガラス板４の厚さを増加させていくと、図８に示すように、伝送効率は減少、増加、減少を繰り返す。言い換えれば、伝送効率が車内側ガラス板４の厚さに応じて極大値および極小値をとりながら変化する。   That is, when the thickness of the vehicle interior glass plate 4 is increased, the transmission efficiency is repeatedly reduced, increased and decreased as shown in FIG. In other words, the transmission efficiency changes while taking the maximum value and the minimum value according to the thickness of the vehicle interior glass plate 4.

また、本発明では対向電極１と車体開口縁との間隔が、１．８〜５０．０ｍｍが好ましい。この間隔が１．８ｍｍ以上であると、伝送効率が向上し好ましい。この間隔が５０．０ｍｍ以下であると、視野の確保の点及び美感上の点で好ましい。この間隔のより好ましい範囲は、３．１〜３０．０ｍｍであり、特に好ましい範囲は、５．０〜２０．０ｍｍである。   In the present invention, the distance between the counter electrode 1 and the vehicle body opening edge is preferably 1.8 to 50.0 mm. It is preferable that the distance is 1.8 mm or more because transmission efficiency is improved. When the distance is 50.0 mm or less, it is preferable in terms of securing a visual field and aesthetics. A more preferable range of this interval is 3.1 to 30.0 mm, and a particularly preferable range is 5.0 to 20.0 mm.

アンテナ導体側給電電極２の面積及び対向電極１の面積が、それぞれ４９〜１４４ｍｍ２、特には、４９〜９２ｍｍ２であるときに、対向電極１及び車体開口縁の最短の間隔が、１．８〜２８ｍｍであることが伝送効率が向上し好ましい。この場合の対向電極１及び車体開口縁の最短の間隔のより好ましい範囲は、３．１〜２５．０ｍｍであり、特に好ましい範囲は、５．０〜２３．０ｍｍである。 Area and the area of the counter electrode 1 of the antenna conductor side feeding electrode 2, respectively 49～144Mm 2, in particular, when it is 49～92Mm 2, the shortest distance between the counter electrode 1 and the vehicle body opening edge, 1.8 It is preferable that the thickness is ˜28 mm because transmission efficiency is improved. In this case, a more preferable range of the shortest distance between the counter electrode 1 and the vehicle body opening edge is 3.1 to 25.0 mm, and a particularly preferable range is 5.0 to 23.0 mm.

図１，２，３に示す例では、アンテナ導体３、アンテナ導体側給電電極２及び対向電極１がそれぞれ１つである。しかし、これに限定されず、アンテナ導体、アンテナ導体側給電電極及び対向電極が複数設けられていてもよい。例えば、図１，２，３に示すアンテナ導体３（第１のアンテナ導体）、アンテナ導体側給電電極２及び対向電極１の他に、第２のアンテナ導体と第２のアンテナ導体側給電電極とが合せガラス板に互いに近接して設けられている場合には、アンテナ導体３と第２のアンテナ導体とから給電するようにし、アンテナ導体３と第２のアンテナ導体との間の電位差を利用するようにしてもよい。また、第２のアンテナ導体側給電電極のための対向電極が合せガラス板の所定の箇所に設けられていてもよい。   In the example shown in FIGS. 1, 2, and 3, the antenna conductor 3, the antenna conductor side feeding electrode 2 and the counter electrode 1 are each one. However, the present invention is not limited to this, and a plurality of antenna conductors, antenna conductor-side feeding electrodes, and counter electrodes may be provided. For example, in addition to the antenna conductor 3 (first antenna conductor), the antenna conductor side feeding electrode 2 and the counter electrode 1 shown in FIGS. 1, 2, and 3, a second antenna conductor and a second antenna conductor side feeding electrode Are provided close to each other on the laminated glass plate, power is fed from the antenna conductor 3 and the second antenna conductor, and the potential difference between the antenna conductor 3 and the second antenna conductor is utilized. You may do it. Moreover, the counter electrode for the 2nd antenna conductor side feeding electrode may be provided in the predetermined location of the laminated glass plate.

車内側ガラス板４の比誘電率と車外側ガラス板５の比誘電率とは、６．０〜７．５が好ましく、６．５〜７．０がより好ましい。対向電極１の形状とアンテナ導体側給電電極２の形状とは、図１では、正方形及び略正方形である。しかし、これに限定されず、長方形又は略長方形等の正方形以外の四角形又は略四角形、円、略円、楕円及び略楕円等であってもよく、特に限定されない。   The relative dielectric constant of the vehicle interior side glass plate 4 and the relative dielectric constant of the vehicle exterior side glass plate 5 are preferably 6.0 to 7.5, and more preferably 6.5 to 7.0. The shape of the counter electrode 1 and the shape of the antenna conductor side feeding electrode 2 are a square and a substantially square in FIG. However, the present invention is not limited thereto, and may be a quadrangle other than a square such as a rectangle or a substantially rectangular shape, or a substantially quadrangular shape, a circle, a substantially circle, an ellipse, a substantially ellipse, or the like, and is not particularly limited.

アンテナ導体３、アンテナ導体側給電電極２及び対向電極１の材質は、銅箔、銅板、銅線が挙げられる。この他、銀ペーストを車内側ガラス板４の合せガラス板内部側接着面、又は、車外側ガラス板５の合せガラス板内部側接着面にプリントし焼付けたもの等でもよい。アンテナ導体３とアンテナ導体側給電電極２とが接続されないで合せガラス板に設けられた場合には、アンテナ導体３とアンテナ導体側給電電極２との接続手段としては、半田付け、溶接、圧接、ろう付け又は導電性接着剤による接着が挙げられる。中間膜６の材質としては、ポリビニールブチラール等が挙げられる。   Examples of the material of the antenna conductor 3, the antenna conductor side feeding electrode 2, and the counter electrode 1 include copper foil, copper plate, and copper wire. In addition to this, a silver paste may be printed and baked on the laminated glass plate inner side adhesive surface of the vehicle inner side glass plate 4 or the laminated glass plate inner side bonded surface of the vehicle outer side glass plate 5. When the antenna conductor 3 and the antenna conductor side feeding electrode 2 are not connected to each other and are provided on a laminated glass plate, the connecting means between the antenna conductor 3 and the antenna conductor side feeding electrode 2 may be soldering, welding, pressure welding, Examples thereof include brazing or adhesion using a conductive adhesive. Examples of the material of the intermediate film 6 include polyvinyl butyral.

以下に実施例を用いて本発明を説明するが、本発明はこれらの実施例には限定されず、本発明の要旨を損なわない限り、各種の改良や変更も本発明に含まれる。   The present invention will be described below with reference to examples, but the present invention is not limited to these examples, and various improvements and modifications are also included in the present invention as long as the gist of the present invention is not impaired.

以下の実施例では、４５０ＭＨｚ，５００ＭＨｚ，５５０ＭＨｚ，６００ＭＨｚ，６５０ＭＨｚ，７００ＭＨｚ，７５０ＭＨｚ及び８００ＭＨｚで、データを採り、これらの各周波数における伝送効率（ｄＢ値）の単純平均を以下に示す特性図に使用した。以下、図面にしたがって、実施例を詳細に説明する。   In the following examples, data was taken at 450 MHz, 500 MHz, 550 MHz, 600 MHz, 650 MHz, 700 MHz, 750 MHz, and 800 MHz, and a simple average of transmission efficiency (dB value) at each frequency was used in the characteristic diagram shown below. . Hereinafter, embodiments will be described in detail with reference to the drawings.

「例１（実施例）」
図４に示すような自動車用高周波ガラスアンテナの擬似的な試験装置を製作した。アンテナ導体側給電電極２と対向電極１とは、ガラス板（不図示）に銅箔を粘着剤により貼着することにより製作した。 "Example 1 (Example)"
A pseudo test apparatus for an automotive high-frequency glass antenna as shown in FIG. 4 was manufactured. The antenna conductor side feeding electrode 2 and the counter electrode 1 were manufactured by sticking a copper foil to a glass plate (not shown) with an adhesive.

図４において、１１ａは第１の同軸ケーブルの内側導体、１１ｂは第１の同軸ケーブルの外側導体、１２ａは第２の同軸ケーブルの内側導体、１２ｂは第２の同軸ケーブルの外側導体、１３は外側導体１１ｂと外側導体１２ｂとを接続しているリード線、Ｌ１はアンテナ導体側給電電極２の一辺の長さ、かつ、対向電極１の一辺の長さである。なお、アンテナ導体側給電電極２と対向電極１とが設けられているガラス板は省略して示した。使用した銅箔及びガラス板、同軸ケーブルの仕様等を以下に示す。 In FIG. 4, 11a is the inner conductor of the first coaxial cable, 11b is the outer conductor of the first coaxial cable, 12a is the inner conductor of the second coaxial cable, 12b is the outer conductor of the second coaxial cable, 13 is A lead wire L 1 connecting the outer conductor 11 b and the outer conductor 12 b is the length of one side of the antenna conductor side feeding electrode 2 and the length of one side of the counter electrode 1. The glass plate on which the antenna conductor side feeding electrode 2 and the counter electrode 1 are provided is omitted. The specifications of the used copper foil, glass plate and coaxial cable are shown below.

銅箔の厚さ ０．０６ｍｍ、
銅箔の電気抵抗率 ２．０×１０−６Ωｃｍ、
ガラス板（縦×横×厚さ） ６００×６００×３．５ｍｍ、
ガラス板の周縁部と銅箔との最短間隔 １０ｍｍ、
同軸ケーブルのインピーダンス ５０Ω。 Copper foil thickness 0.06mm,
Electrical resistivity of copper foil 2.0 × 10 −6 Ωcm,
Glass plate (length x width x thickness) 600 x 600 x 3.5 mm,
The shortest distance between the peripheral edge of the glass plate and the copper foil is 10 mm,
The impedance of the coaxial cable is 50Ω.

内側導体１１ａとアンテナ導体側給電電極２との接着、内側導体１２ａと対向電極１との接着、外側導体１１ｂとリード線１３との接着、外側導体１２ｂとリード線１３との接着、外側導体１１ｂと接地との接着、及び、外側導体１２ｂと接地との接着は半田により行った。内側導体１１ａに所定電圧値の信号電圧を印加し、内側導体１２ａの信号電圧を測定した。この測定手段については、以下の例でも同様である。   Adhesion between the inner conductor 11a and the antenna conductor side feeding electrode 2, adhesion between the inner conductor 12a and the counter electrode 1, adhesion between the outer conductor 11b and the lead wire 13, adhesion between the outer conductor 12b and the lead wire 13, outer conductor 11b Bonding between the outer conductor 12b and the ground was performed by soldering. A signal voltage having a predetermined voltage value was applied to the inner conductor 11a, and the signal voltage of the inner conductor 12a was measured. This measuring means is the same in the following examples.

アンテナ導体側給電電極２の形状と対向電極１の形状とを正方形とし、かつ、同じ寸法にして、縦軸を伝送効率（ｄＢ）、横軸をアンテナ導体側給電電極２の面積と対向電極１の面積にした特性図を図５に示した。アンテナ導体側給電電極２の面積と対向電極１の面積との変更は、Ｌ１を１０〜５０ｍｍで変化させることにより行った。 The shape of the antenna conductor side feeding electrode 2 and the shape of the counter electrode 1 are square and have the same dimensions, the vertical axis represents transmission efficiency (dB), the horizontal axis represents the area of the antenna conductor side feeding electrode 2 and the counter electrode 1. FIG. 5 shows a characteristic diagram with the area of. The area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1 were changed by changing L1 by 10 to 50 mm.

「例２（実施例）」
図６に示すような自動車用高周波ガラスアンテナの擬似的な試験装置を製作した。図６に示す試験装置は擬似的な自動車の車体として鉄製の枠１４を備え、図４に示す試験装置のガラス板を枠１４に取り付けたものである。枠１４の最外周の形状は正方形であり、この枠１４の紙面に対して垂直方向の断面がＬ字状である。枠１４の仕様等を以下に記載する。 "Example 2 (Example)"
A pseudo test apparatus for an automotive high frequency glass antenna as shown in FIG. 6 was manufactured. The test apparatus shown in FIG. 6 includes an iron frame 14 as a pseudo automobile body, and the glass plate of the test apparatus shown in FIG. The shape of the outermost periphery of the frame 14 is a square, and the cross section perpendicular to the paper surface of the frame 14 is L-shaped. The specifications of the frame 14 are described below.

枠１４の最外周の形状である正方形 ６１０×６１０ｍｍ、
枠１４のＬ字 ２５×２５ｍｍ、
枠１４の鉄板の厚さ ２．８ｍｍ、
Ｌ１ ２０ｍｍ、
図６における、枠１４の上辺内周側端部と、対向電極１の上側端部との最短間隔Ｌ１２
２０ｍｍ。 A square 610 × 610 mm which is the outermost shape of the frame 14,
L shape of frame 14 25 × 25mm,
The thickness of the steel plate of the frame 14 is 2.8 mm,
L 1 20mm,
In FIG. 6, the shortest distance L 12 between the inner peripheral side end of the upper side of the frame 14 and the upper end of the counter electrode 1.
20 mm.

対向電極１と枠１４との最短間隔Ｌ２を０．１〜３０．０ｍｍの間で変化させて、縦軸を伝送効率（ｄＢ）、横軸をＬ２にした特性図を図７に示した。 The shortest distance L 2 between the counter electrode 1 and the frame 14 is varied between 0.1～30.0Mm, the vertical axis transmission efficiency (dB), shows the horizontal axis in FIG. 7 the characteristics diagram in L 2 It was.

「例３（実施例）」
ガラス板の厚さを、２．０〜６．０ｍｍに変更し、Ｌ１を２０ｍｍに固定した以外は、例１と同様の仕様とした試験装置を製作した。縦軸を伝送効率（ｄＢ）、横軸をガラス板の厚さにした特性図を図８に示した。 "Example 3 (Example)"
A test apparatus having the same specifications as in Example 1 was manufactured, except that the thickness of the glass plate was changed to 2.0 to 6.0 mm and L 1 was fixed to 20 mm. FIG. 8 is a characteristic diagram in which the vertical axis represents the transmission efficiency (dB) and the horizontal axis represents the thickness of the glass plate.

「例４（実施例）」
図９に示すような自動車用高周波ガラスアンテナの擬似的な試験装置を製作した。以下に示す仕様以外は、例１と同様である。図９において、４１はガラス板、１５はコノ字状の鉄製の金具、１５ａは金具１５に設けられた孔である。この試験装置では、金具１５により、第１の同軸ケーブルの外側導体１１ｂと第２の同軸ケーブルの外側導体１２ｂとが接続されている。ガラス板４１の寸法は６００×６００×２．０ｍｍであり、ガラス板４１の材質はソーダライムである。アンテナ導体側給電電極２と対向電極１とはガラス板４１の中心に設けた。 "Example 4 (Example)"
A pseudo test apparatus for an automotive high-frequency glass antenna as shown in FIG. 9 was manufactured. Except for the specification shown below, it is the same as Example 1. In FIG. 9, reference numeral 41 denotes a glass plate, 15 denotes a cono-shaped iron metal fitting, and 15 a denotes a hole provided in the metal fitting 15. In this test apparatus, the outer conductor 11 b of the first coaxial cable and the outer conductor 12 b of the second coaxial cable are connected by the metal fitting 15. The size of the glass plate 41 is 600 × 600 × 2.0 mm, and the material of the glass plate 41 is soda lime. The antenna conductor side feeding electrode 2 and the counter electrode 1 were provided at the center of the glass plate 41.

アンテナ導体側給電電極２の形状と対向電極１の形状とを正方形とし、かつ、同じ寸法にして、アンテナ導体側給電電極２の一辺の長さ（対向電極１の一辺の長さ、図９に示されていないが、図４に示されているＬ１に相当する。）を５〜８０ｍｍで変化させて試験した。縦軸を伝送効率（ｄＢ）、横軸をアンテナ導体側給電電極２の面積と対向電極１の面積にした特性図を図１０に示した。また、図１０における横軸の０〜１０００ｍｍ２の部分を拡大して図１１に示した。 The shape of the antenna conductor side feed electrode 2 and the shape of the counter electrode 1 are square and have the same dimensions, and the length of one side of the antenna conductor side feed electrode 2 (the length of one side of the counter electrode 1, FIG. Although not shown, it corresponds to L 1 shown in FIG. FIG. 10 is a characteristic diagram in which the vertical axis represents transmission efficiency (dB) and the horizontal axis represents the area of the antenna conductor side feeding electrode 2 and the area of the counter electrode 1. Further, the portion of 0 to 1000 mm 2 on the horizontal axis in FIG. 10 is enlarged and shown in FIG.

「例５（実施例）」
リード線１３を金具１５に変更し、諸数値を以下のとおりに変更した以外は、例２と同様な方法で測定を行った。対向電極１と枠１４との最短間隔Ｌ２を、０．１〜７５ｍｍの間で変化させて、縦軸を伝送効率（ｄＢ）、横軸をＬ２にした特性図を図１２に示した。 "Example 5 (Example)"
Measurement was performed in the same manner as in Example 2 except that the lead wire 13 was changed to the metal fitting 15 and the numerical values were changed as follows. The shortest distance L 2 between the counter electrode 1 and the frame 14, and varied between 0.1～75Mm, the vertical axis transmission efficiency (dB), showed horizontal axis in FIG. 12 the characteristics diagram in L 2 .

ガラス板（縦×横×厚さ） ６００×６００×２．０ｍｍ、
Ｌ１ ８ｍｍ、
図６における、枠１４の上側端部と、対向電極１の上側端部との最短間隔Ｌ１２
４０ｍｍ。 Glass plate (length x width x thickness) 600 x 600 x 2.0 mm,
L 1 8mm,
In FIG. 6, the shortest distance L 12 between the upper end of the frame 14 and the upper end of the counter electrode 1.
40 mm.

デジタルテレビ放送又はＵＨＦのテレビ放送を受信する、自動車用ガラスアンテナに利用される。   Used for glass antennas for automobiles that receive digital television broadcasts or UHF television broadcasts.

１：受信機側給電電極（対向電極）
２：アンテナ導体側給電電極
３：アンテナ導体
４：車内側ガラス板
５：車外側ガラス板
６：中間膜 1: Receiver-side power supply electrode (counter electrode)
2: Antenna conductor side feeding electrode 3: Antenna conductor 4: Car interior glass plate 5: Car outer glass plate 6: Intermediate film

Claims (12)

接着層を介して接着される２枚のガラス板を備える自動車用の合せ窓ガラス板における該２枚のガラス板の間に、アンテナ導体及び該アンテナ導体に接続されたアンテナ導体側給電電極が設けられているとともに、
該合せ窓ガラス板の車内側の面上であってアンテナ導体側給電電極に対向する箇所に受信機側給電電極が設けられている自動車用高周波ガラスアンテナにおいて、
受信する搬送波の周波数が、４５０〜８０６ＭＨｚの間に存在し、
前記アンテナ導体側給電電極の面積及び前記受信機側給電電極の面積が、それぞれ３６０〜９００ｍｍ２であることを特徴とする自動車用高周波ガラスアンテナ。 An antenna conductor and an antenna conductor-side feeding electrode connected to the antenna conductor are provided between the two glass plates in a laminated window glass plate for an automobile including two glass plates bonded through an adhesive layer. And
In the automotive high-frequency glass antenna in which the receiver-side power supply electrode is provided at a location facing the antenna conductor-side power supply electrode on the inner surface of the laminated window glass plate,
The frequency of the received carrier wave is between 450 and 806 MHz,
The automotive high-frequency glass antenna, wherein an area of the antenna conductor side feeding electrode and an area of the receiver side feeding electrode are 360 to 900 mm 2 , respectively. 前記受信機側給電電極と車体開口縁との最短の間隔が、１．８〜５０．０ｍｍである自動車用高周波ガラスアンテナ。   A high-frequency glass antenna for an automobile, wherein a minimum distance between the receiver-side feeding electrode and a vehicle body opening edge is 1.8 to 50.0 mm. 前記受信機側給電電極と前記車体開口縁との最短の間隔が、３．１〜３０．０ｍｍである請求項１に記載の自動車用高周波ガラスアンテナ。   2. The high frequency glass antenna for an automobile according to claim 1, wherein the shortest distance between the receiver-side feeding electrode and the vehicle body opening edge is 3.1 to 30.0 mm. 前記受信機側給電電極と前記車体開口縁との最短の間隔が、５．０〜２０．０ｍｍである請求項１に記載の自動車用高周波ガラスアンテナ。   2. The high-frequency glass antenna for an automobile according to claim 1, wherein the shortest distance between the receiver-side feeding electrode and the vehicle body opening edge is 5.0 to 20.0 mm. 前記アンテナ導体側給電電極と前記受信機側給電電極との間隔が、１.５０〜６．００ｍｍであり、
アンテナ導体側給電電極と受信機側給電電極との間隔と、アンテナ導体側給電電極から受信機側給電電極へ伝送される受信信号の伝送効率との関係において、該伝送効率が該間隔に応じて極小値及び極大値をとりながら変化する場合に、該伝送効率が該極小値の近傍とならないように、該間隔が設定される請求項１に記載の自動車用高周波ガラスアンテナ。 The distance between the antenna conductor side feeding electrode and the receiver side feeding electrode is 1.50 to 6.00 mm,
In the relationship between the distance between the antenna conductor side power supply electrode and the receiver side power supply electrode and the transmission efficiency of the received signal transmitted from the antenna conductor side power supply electrode to the receiver side power supply electrode, the transmission efficiency depends on the distance. The high frequency glass antenna for an automobile according to claim 1, wherein the interval is set so that the transmission efficiency does not become close to the minimum value when changing while taking the minimum value and the maximum value. 以下の式を満足するように、前記アンテナ導体側給電電極と前記受信機側給電電極との間隔が設定される請求項５に記載の自動車用高周波ガラスアンテナ。
前記極大値≧前記伝送効率≧（１／３）（２×前記極大値＋前記極小値）。 The high frequency glass antenna for an automobile according to claim 5, wherein an interval between the antenna conductor side feeding electrode and the receiver side feeding electrode is set so as to satisfy the following expression.
The maximum value ≧ the transmission efficiency ≧ (1/3) (2 × the maximum value + the minimum value). 前記アンテナ導体側給電電極の面積が、前記受信機側給電電極の面積の０．５〜１．５倍である請求項１〜６のいずれかに記載の自動車用高周波ガラスアンテナ。   The high-frequency glass antenna for an automobile according to any one of claims 1 to 6, wherein an area of the antenna conductor side feeding electrode is 0.5 to 1.5 times an area of the receiver side feeding electrode. 前記アンテナ導体側給電電極と前記受信機側給電電極との間隔が、１.５０〜２．４９ｍｍ、又は、４．３６〜６．００ｍｍである請求項１〜７のいずれかに記載の自動車用高周波ガラスアンテナ。   The distance between the antenna conductor side feeding electrode and the receiver side feeding electrode is 1.50 to 2.49 mm, or 4.36 to 6.00 mm, for an automobile according to any one of claims 1 to 7. High frequency glass antenna. 前記合せ窓ガラス板が、車内側ガラス板、車外側ガラス板、及び、車内側ガラス板と車外側ガラス板との間に介在する合成樹脂製の中間膜を備え、
前記アンテナ導体側給電電極が車内側ガラス板の中間膜側の面、又は、車外側ガラス板の中間膜側の面に設けられている請求項１〜８のいずれかに記載の自動車用高周波ガラスアンテナ。 The laminated window glass plate includes a vehicle inner glass plate, a vehicle outer glass plate, and a synthetic resin intermediate film interposed between the vehicle inner glass plate and the vehicle outer glass plate,
The high-frequency glass for automobiles according to any one of claims 1 to 8, wherein the antenna conductor-side feeding electrode is provided on a surface on the intermediate film side of the inner glass plate or a surface on the intermediate film side of the outer glass plate. antenna. 前記合せ窓ガラス板の車内側の面の上に隠蔽膜が設けられており、該隠蔽膜の上に前記受信機側給電電極が設けられている請求項１〜９のいずれかに記載の自動車用高周波ガラスアンテナ。   The automobile according to any one of claims 1 to 9, wherein a concealing film is provided on an inner surface of the laminated window glass plate, and the receiver-side feeding electrode is provided on the concealing film. High frequency glass antenna. 前記アンテナ導体側給電電極及び前記受信機側給電電極の少なくとも一方の形状が、四角形、略四角形、円、略円、楕円及び略楕円である請求項１〜１０のいずれかに記載の自動車用高周波ガラスアンテナ。   The high frequency wave for an automobile according to any one of claims 1 to 10, wherein at least one of the antenna conductor side feeding electrode and the receiver side feeding electrode is a square, a substantially square, a circle, a substantially circle, an ellipse, and a substantially ellipse. Glass antenna. 請求項１〜１１のいずれかに記載の自動車用高周波ガラスアンテナを備えた自動車用の合せ窓ガラス板。   A laminated window glass plate for an automobile, comprising the automotive high-frequency glass antenna according to claim 1.
JP2010157903A 2004-07-21 2010-07-12 High frequency wave glass antenna for automobile Withdrawn JP2010263646A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2660930A4 (en) * 2010-12-28 2015-09-30 Asahi Glass Co Ltd Antenna
JP2020073392A (en) * 2016-03-23 2020-05-14 Ａｇｃ株式会社 Vehicular window plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009001798A1 (en) * 2007-06-22 2008-12-31 Asahi Glass Company, Limited High frequency glass antenna for automobiles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2660930A4 (en) * 2010-12-28 2015-09-30 Asahi Glass Co Ltd Antenna
US9553359B2 (en) 2010-12-28 2017-01-24 Asahi Glass Company, Limited Antenna apparatus
JP2020073392A (en) * 2016-03-23 2020-05-14 Ａｇｃ株式会社 Vehicular window plate

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