JP5061015B2 - Glass antenna for vehicles - Google Patents
Glass antenna for vehicles Download PDFInfo
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- JP5061015B2 JP5061015B2 JP2008099319A JP2008099319A JP5061015B2 JP 5061015 B2 JP5061015 B2 JP 5061015B2 JP 2008099319 A JP2008099319 A JP 2008099319A JP 2008099319 A JP2008099319 A JP 2008099319A JP 5061015 B2 JP5061015 B2 JP 5061015B2
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- 239000011521 glass Substances 0.000 title claims description 50
- 239000004020 conductor Substances 0.000 claims description 163
- 230000003071 parasitic effect Effects 0.000 claims description 11
- 239000005357 flat glass Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 description 25
- 238000005259 measurement Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1271—Supports; Mounting means for mounting on windscreens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/378—Combination of fed elements with parasitic elements
- H01Q5/392—Combination of fed elements with parasitic elements the parasitic elements having dual-band or multi-band characteristics
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- Details Of Aerials (AREA)
Description
本発明は、車両用ガラスアンテナ、特に地上波デジタルテレビ（ＤＴＶ）放送を受信するための車両用ガラスアンテナに関する。 The present invention relates to a glass antenna for vehicles, and more particularly to a glass antenna for vehicles for receiving terrestrial digital television (DTV) broadcasts.
ＤＴＶ放送（４７０〜７７０ＭＨｚ）受信用アンテナの一例が、特開２００８−２２５３８号公報に開示されている。このアンテナによれば、アンテナ導体がループ部を形成するようにして、複数の共振周波数を有し、広帯域化を図っている。しかし、車両用ガラスアンテナのニーズに対して充分なほど広帯域に良好なアンテナ特性は得られていない。
本発明の目的は、簡単なアンテナパターンで広帯域および良好な特性を実現できるＤＴＶアンテナを提供することにある。 An object of the present invention is to provide a DTV antenna capable of realizing a wide band and good characteristics with a simple antenna pattern.
本発明は、車両用窓ガラスの表面に形成するための車両用ガラスアンテナであり、
給電点と、
前記給電点に一端が接続された主アンテナ素子と、
前記主アンテナ素子に接続された補助素子とを有し、
前記主アンテナ素子は、一端が前記給電点に接続され、横方向に延びる第１の線状導体と、この第１の線状導体の他端から下方に縦方向に延びる第２の線状導体と、この第２の線状導体の他端から前記第１の線状導体に対して略平行に横方向に延びる第３の線状導体とを備え、
前記補助素子は、前記第1の線状導体の前記給電点の近傍に一端が接続され、接続された位置から下方に縦方向に延びる第４の線状導体と、この第４の線状導体の他端から前記第２の線状導体とは反対側の方向へ、前記第1および第３の線状導体と略平行に横方向に延びる第５の線状導体を備える車両用ガラスアンテナであって、
前記第２の線状導体と対向するとともに高周波的に容量結合する無給電素子を有する、ことを特徴とする。
The present invention is a vehicle glass antenna for forming on the surface of a vehicle window glass ,
A feeding point;
A main antenna element having one end connected to the feed point;
An auxiliary element connected to the main antenna element,
The main antenna element has a first linear conductor having one end connected to the feeding point and extending in the lateral direction, and a second linear conductor extending vertically from the other end of the first linear conductor. And a third linear conductor extending in a lateral direction substantially parallel to the first linear conductor from the other end of the second linear conductor,
The auxiliary element has one end connected to the vicinity of the feeding point of the first linear conductor, a fourth linear conductor extending vertically from the connected position, and the fourth linear conductor. the other end in the direction opposite to the second linear conductors from the first and third linear conductor and fifth glass antenna for a vehicle Ru provided with a linear conductor of substantially parallel extending laterally Because
A parasitic element that opposes the second linear conductor and capacitively couples in a high frequency manner is provided.
本発明によれば、主アンテナ素子に補助素子を設けるという簡単な構成により、補助素子によって主アンテナ素子とは異なる共振周波数に共振させることによって、広帯域受信を可能とする。これにより、４７０〜７７０ＭＨｚのデジタルＴＶ周波数全域に良好な特性を持つ広帯域なアンテナを実現できる。 According to the present invention, a simple configuration in which an auxiliary element is provided in the main antenna element enables broadband reception by causing the auxiliary element to resonate at a resonance frequency different from that of the main antenna element. As a result, it is possible to realize a broadband antenna having good characteristics over the entire digital TV frequency of 470 to 770 MHz.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１は、車両のフロントガラス１０に形成された本発明の車両用ガラスアンテナの一実施例を示す図である。図面を簡単にするために、フロントガラスは、ＤＴＶアンテナが形成されている付近のみを示している。フロントガラスの周囲には、美観の点から車体の金属部との接合部分を隠すために黒色の遮蔽膜１２が、設けられている。 FIG. 1 is a diagram showing an embodiment of a glass antenna for a vehicle according to the present invention formed on a windshield 10 of a vehicle. In order to simplify the drawing, the windshield shows only the vicinity where the DTV antenna is formed. A black shielding film 12 is provided around the windshield in order to conceal the joint portion with the metal part of the vehicle body from the point of view of beauty.
本実施例の車両用ガラスアンテナは、車体ルーフの金属部の近くに設けられた給電点１４を有している。給電点には、主アンテナ素子１６が接続されている。主アンテナ素子は、
給電点１４から横方向に延びる第１の線状導体１８と、この第１の線状導体１８の他端から下方に縦方向に延びる第２の線状導体２０と、この第２の線状導体２０の他端から第１の線状導体１８に対して略平行に横方向に延びる第３の線状導体２２とにより構成される。このように、主アンテナ素子１６は、Ｕ字状の形状を有している。
The glass antenna for a vehicle of the present embodiment has a feeding point 14 provided near the metal part of the vehicle body roof. The main antenna element 16 is connected to the feeding point. The main antenna element is
A first linear conductor 18 extending in the lateral direction from the feeding point 14, a second linear conductor 20 extending vertically from the other end of the first linear conductor 18, and the second linear conductor The third linear conductor 22 extends in the lateral direction from the other end of the conductor 20 in a direction substantially parallel to the first linear conductor 18. Thus, the main antenna element 16 has a U-shape.
このような主アンテナ素子１６の第１の線状導体１８の給電点近くの接続点２４に接続される補助素子２６を設ける。補助素子２６は、接続点２４から下方に縦方向に延びる第４の線状導体２７と、この第４の線状導体２７の他端から第２の線状導体２０とは反対側の方向へ、第１の線状導体１８，第３の線状導体２２と略平行に横方向に延びる第５の線状導体２８により構成される。 The auxiliary element 26 connected to the connection point 24 near the feeding point of the first linear conductor 18 of the main antenna element 16 is provided. The auxiliary element 26 has a fourth linear conductor 27 extending vertically from the connection point 24 and a direction opposite to the second linear conductor 20 from the other end of the fourth linear conductor 27. The first linear conductor 18 and the third linear conductor 22 are constituted by a fifth linear conductor 28 extending in a lateral direction substantially parallel to the first linear conductor 18 and the third linear conductor 22.
図１に示す実施例１の車両用ガラスアンテナの各線状導体の長さは、以下の長さである。
第１の線状導体： ８０ｍｍ
第２の線状導体： ４０ｍｍ
第３の線状導体： ９０ｍｍ
第４の線状導体： ５ｍｍ
第５の線状導体： １５０ｍｍ
The length of each linear conductor of the vehicle glass antenna of Example 1 shown in FIG. 1 is the following length.
First linear conductor: 80 mm
Second linear conductor: 40 mm
Third linear conductor: 90mm
Fourth linear conductor: 5 mm
Fifth linear conductor: 150mm
また、給電点１４と接続点２４との間の距離は、２５ｍｍである。このような寸法とすることによりデジタルTV周波数全域に対して良好な特性を持つアンテナが実現できる。 The distance between the feeding point 14 and the connection point 24 is 25 mm. By setting the dimensions as described above, an antenna having good characteristics over the entire digital TV frequency can be realized.
本実施例の車両用ガラスアンテナの各線状導体の長さ、および給電点１４と接続点２４との間の距離は、前述した寸法に限定されるものではない。例えば、以下の範囲の寸法としても好適なガラスアンテナが得られる。
第１の線状導体： ６０〜１１０ｍｍ
第２の線状導体： ２０〜６０ｍｍ
第３の線状導体： ６０〜１１０ｍｍ
第４の線状導体： ３〜４０ｍｍ
第５の線状導体：１２０〜１８０ｍｍ
給電点と接続点との間の距離： １５〜３５ｍｍ
第１の線状導体１８の長さを６０〜１１０ｍｍの長さとすることにより、車両用ガラスアンテナにより受信する周波数帯域の高周波側の波長の約４分の１波長の長さとすることができ、高周波側の受信感度が良くなる。
The length of each linear conductor of the glass antenna for a vehicle of the present embodiment and the distance between the feeding point 14 and the connection point 24 are not limited to the dimensions described above. For example, a glass antenna suitable for dimensions in the following range can be obtained.
First linear conductor: 60 to 110 mm
Second linear conductor: 20 to 60 mm
Third linear conductor: 60 to 110 mm
Fourth linear conductor: 3 to 40 mm
Fifth linear conductor: 120 to 180 mm
Distance between feed point and connection point: 15-35mm
By setting the length of the first linear conductor 18 to a length of 60 to 110 mm, the length of the wavelength on the high frequency side of the frequency band received by the vehicle glass antenna can be set to about a quarter wavelength. The reception sensitivity on the high frequency side is improved.
また、第４、第５の線状導体２７，２８のそれぞれの長さの合計を１２０〜１８０ｍｍとすることにより、車両用ガラスアンテナにより受信する周波数帯域の低周波側の波長の約４分の１波長の長さとすることができ、低周波側の受信感度が良くなる。 Further, by setting the total length of the fourth and fifth linear conductors 27 and 28 to 120 to 180 mm, it is about 4 minutes of the low frequency side wavelength of the frequency band received by the vehicle glass antenna. The length can be one wavelength, and the reception sensitivity on the low frequency side is improved.
さらに、給電点１４と接続点２４との間の距離を１５〜３５ｍｍとすることにより、２つの線状導体を不整合なく接続することができ、デジタルＴＶの主要局が使用する波長５２０〜５７０ＭＨｚの感度が良好となる。 Furthermore, by setting the distance between the feeding point 14 and the connection point 24 to 15 to 35 mm, the two linear conductors can be connected without mismatch, and the wavelength of 520 to 570 MHz used by the main station of the digital TV. The sensitivity of is improved.
本実施例の車両用ガラスアンテナの第１、第２、第３の線状導体１８，２０，２２のそれぞれの長さの合計は、２００〜２８０ｍｍとすることが好ましい。このような長さとすることにより、高周波数側の波長の約３／４波長の長さとすることができ、高域側の受信感度がよくなる。 The total length of each of the first, second, and third linear conductors 18, 20, and 22 of the vehicle glass antenna of this embodiment is preferably 200 to 280 mm. By adopting such a length, it is possible to make the length about 3/4 of the wavelength on the high frequency side, and the reception sensitivity on the high frequency side is improved.
図１に示した本実施例の車両用ガラスアンテナにおける補助素子の効果を確かめるために、補助素子２６のない主アンテナ素子１６のみのアンテナを用意し、このアンテナと本実施例のアンテナとの感度を測定した。図２に、測定結果を示す。図中、横軸は周波数（ＭＨｚ）を、縦軸は感度（ｄＢｄ）を示す。測定結果によれば、補助素子のある方が、低周波側の感度が高くなっている。このことから、補助素子を設けることによって、広帯域化が可能となることがわかる。 In order to confirm the effect of the auxiliary element in the vehicle glass antenna of this embodiment shown in FIG. 1, an antenna having only the main antenna element 16 without the auxiliary element 26 is prepared, and the sensitivity between this antenna and the antenna of this embodiment is prepared. Was measured. FIG. 2 shows the measurement results. In the figure, the horizontal axis represents frequency (MHz) and the vertical axis represents sensitivity (dBd). According to the measurement results, the sensitivity on the low frequency side is higher with the auxiliary element. From this, it can be seen that providing an auxiliary element makes it possible to widen the bandwidth.
また、図１に示した車両用ガラスアンテナにおいて、第１の線状導体１８に第４の線状導体２７を接続した接続点２４と給電点１４との間の距離が、アンテナ感度に与える影響について測定した結果を図３に示す。第４の線状導体２７を給電点１４に直接接続するよりも、給電点１４から距離を離して接続する方が、アンテナ感度が高くなっていることがわかる。 In addition, in the glass antenna for a vehicle shown in FIG. 1, the influence of the distance between the connection point 24 where the fourth linear conductor 27 is connected to the first linear conductor 18 and the feeding point 14 on the antenna sensitivity. The measurement results for are shown in FIG. It can be seen that the antenna sensitivity is higher when the fourth linear conductor 27 is connected at a distance from the feeding point 14 than when the fourth linear conductor 27 is directly connected to the feeding point 14.
また、本実施例の車両用ガラスアンテナでは、図１に示すように、給電点１４、主アンテナ素子１６の線状導体１８、線状導体２８の略上半分、補助素子２６は、遮蔽膜１２で隠されており、主アンテナ素子１６の線状導体２２、線状導体２０の略下半分のみが見えるだけであるので、フロントガラスの美観を損なわないという利点もある。 Further, in the glass antenna for a vehicle according to the present embodiment, as shown in FIG. 1, the feeding point 14, the linear conductor 18 of the main antenna element 16, the substantially upper half of the linear conductor 28, and the auxiliary element 26 include the shielding film 12. Since only the substantially lower half of the linear conductor 22 and the linear conductor 20 of the main antenna element 16 can be seen, there is an advantage that the aesthetic appearance of the windshield is not impaired.
図４は、車両のフロントガラス１０に形成された本発明の車両用ガラスアンテナの他の実施例を示す図である。本実施例では、無給電素子３０をさらに付加した。なお、図において、図１と同様の構成要素には同一の参照番号を付して示す。 FIG. 4 is a view showing another embodiment of the vehicle glass antenna of the present invention formed on the windshield 10 of the vehicle. In this embodiment, a parasitic element 30 is further added. In the figure, components similar to those in FIG. 1 are denoted by the same reference numerals.
無給電素子３０は、給電点側の第２の線状導体２０と略並行に縦方向に延びる第６の線状導体３２と、この第６の線状導体３２の一端から、主アンテナ素子１６の第１の線状導体１８の延長線上を横方向に延びる第７の線状導体３４と、第６の線状導体３２の他端から、主アンテナ素子１６の第３の線状導体２２の延長線上を横方向に延びる第８の線状導体３６とにより構成されている。 The parasitic element 30 includes a sixth linear conductor 32 extending in the longitudinal direction substantially parallel to the second linear conductor 20 on the feeding point side, and the main antenna element 16 from one end of the sixth linear conductor 32. Of the third linear conductor 22 of the main antenna element 16 from the other end of the sixth linear conductor 32 and the seventh linear conductor 34 extending laterally on the extended line of the first linear conductor 18. It is comprised by the 8th linear conductor 36 extended in the horizontal direction on the extension line.
図４に示す実施例２の車両用ガラスアンテナの各線状導体の長さは、以下の長さである。
第１の線状導体： １００ｍｍ
第２の線状導体： ２０ｍｍ
第３の線状導体： １００ｍｍ
第４の線状導体： ５ｍｍ
第５の線状導体： １３０ｍｍ
第６の線状導体： ２０ｍｍ
第７の線状導体： １１０ｍｍ
第８の線状導体： １００ｍｍ
第２の線状導体と第６の線状導体との離間距離： １０ｍｍ
また、給電点１４と接続点２４との間の距離は、２５ｍｍである。このような寸法とすることによりデジタルTV周波数全域に対して良好な特性を持つアンテナが実現できる。
The length of each linear conductor of the glass antenna for a vehicle of Example 2 shown in FIG. 4 is the following length.
First linear conductor: 100 mm
Second linear conductor: 20 mm
Third linear conductor: 100 mm
Fourth linear conductor: 5 mm
Fifth linear conductor: 130mm
Sixth linear conductor: 20 mm
Seventh linear conductor: 110 mm
Eighth linear conductor: 100mm
Separation distance between the second linear conductor and the sixth linear conductor: 10 mm
The distance between the feeding point 14 and the connection point 24 is 25 mm. By setting the dimensions as described above, an antenna having good characteristics over the entire digital TV frequency can be realized.
本実施例の車両用ガラスアンテナの各線状導体の長さ、および給電点１４と接続点２４との間の距離は、前述した寸法に限定されるものではない。例えば、以下の範囲の寸法としても好適なガラスアンテナが得られる。
第１の線状導体： ６０〜１１０ｍｍ
第２の線状導体： １０〜３０ｍｍ
第３の線状導体： ８０〜１３０ｍｍ
第４の線状導体： ３〜２０ｍｍ
第５の線状導体：１００〜１５０ｍｍ
給電点と接続点との間の距離： １５〜３５ｍｍ
第２の線状導体と第６の線状導体との離間距離： ５〜２０ｍｍ
第１の線状導体１８の長さを６０〜１１０ｍｍの長さとすることにより、車両用ガラスアンテナにより受信する周波数帯域の高周波側の波長の約４分の１波長の長さとすることができ、高周波側の受信感度が良くなる。
The length of each linear conductor of the glass antenna for a vehicle of the present embodiment and the distance between the feeding point 14 and the connection point 24 are not limited to the dimensions described above. For example, a glass antenna suitable for dimensions in the following range can be obtained.
First linear conductor: 60 to 110 mm
Second linear conductor: 10 to 30 mm
Third linear conductor: 80 to 130 mm
Fourth linear conductor: 3 to 20 mm
Fifth linear conductor: 100 to 150 mm
Distance between feed point and connection point: 15-35mm
Separation distance between second linear conductor and sixth linear conductor: 5 to 20 mm
By setting the length of the first linear conductor 18 to a length of 60 to 110 mm, the length of the wavelength on the high frequency side of the frequency band received by the vehicle glass antenna can be set to about a quarter wavelength. The reception sensitivity on the high frequency side is improved.
また、第４、第５の線状導体２７，２８のそれぞれの長さの合計を１２０〜１８０ｍｍとすることにより、車両用ガラスアンテナにより受信する周波数帯域の低周波側の波長の約４分の１波長の長さとすることができ、低周波側の受信感度が良くなる。 Further, by setting the total length of the fourth and fifth linear conductors 27 and 28 to 120 to 180 mm, it is about 4 minutes of the low frequency side wavelength of the frequency band received by the vehicle glass antenna. The length can be one wavelength, and the reception sensitivity on the low frequency side is improved.
さらに、給電点１４と接続点２４との間の距離を１５〜３５ｍｍとすることにより、２つの線状導体を不整合なく接続することができ、デジタルＴＶの主要局が使用する波長５２０〜５７０ＭＨｚの感度が良好となる。 Furthermore, by setting the distance between the feeding point 14 and the connection point 24 to 15 to 35 mm, the two linear conductors can be connected without mismatch, and the wavelength of 520 to 570 MHz used by the main station of the digital TV. The sensitivity of is improved.
本実施例の車両用ガラスアンテナの第１、第２、第３の線状導体１８，２０，２２のそれぞれの長さの合計は、２００〜２８０ｍｍとすることが好ましい。このような長さとすることにより、高周波数側の波長の約３／４波長の長さとすることができ、高域側の受信感度がよくなる。 The total length of each of the first, second, and third linear conductors 18, 20, and 22 of the vehicle glass antenna of this embodiment is preferably 200 to 280 mm. By adopting such a length, it is possible to make the length about 3/4 of the wavelength on the high frequency side, and the reception sensitivity on the high frequency side is improved.
図４に示した本実施例の車両用ガラスアンテナにおける補助素子の効果を確かめるために、補助素子２６のない主アンテナ素子１６および無給電素子３０のみのアンテナを用意し、このアンテナと本実施例のアンテナとの感度を測定した。図５に、測定結果を示す。補助素子のある方が、低周波側で感度が高くなっている。このことから、補助素子を設けることによって、広帯域化が可能となることがわかる。 In order to confirm the effect of the auxiliary element in the vehicle glass antenna of this embodiment shown in FIG. 4, an antenna having only the main antenna element 16 and the parasitic element 30 without the auxiliary element 26 is prepared. The sensitivity with the antenna was measured. FIG. 5 shows the measurement results. The sensitivity with the auxiliary element is higher on the low frequency side. From this, it can be seen that providing an auxiliary element makes it possible to widen the bandwidth.
また、実施例１と同様に、アンテナ素子および無給電素子の大部分が、遮蔽膜１２で隠されており、フロントガラスの美観を損なわない。 Further, as in the first embodiment, most of the antenna element and the parasitic element are hidden by the shielding film 12, and the appearance of the windshield is not impaired.
図６は、車両のフロントガラス１０に形成された本発明の車両用ガラスアンテナのさらに他の実施例を示す図である。本実施例では、給電点１４を車体のピラー４０側に設け、主アンテナ素子１６および補助素子２６を、図１の例とは反対の横方向に延在させている。さらに、主アンテナ素子１６を折り返した構造とし、および補助素子２６の先端部分を下方の折り曲げた構造としている。 FIG. 6 is a view showing still another embodiment of the vehicle glass antenna of the present invention formed on the windshield 10 of the vehicle. In the present embodiment, the feeding point 14 is provided on the pillar 40 side of the vehicle body, and the main antenna element 16 and the auxiliary element 26 are extended in the lateral direction opposite to the example of FIG. Further, the main antenna element 16 is folded and the tip of the auxiliary element 26 is folded downward.
主アンテナ素子１６の折り返し構造部分を形成する第９の線状導体および第１０線状導体を、図６に参照番号４２，４４で示す。また、補助素子２６の折り曲げ構造部分を形成する第１１の線状導体を、図７に参照番号４６で示す。 The ninth linear conductor and the tenth linear conductor forming the folded structure portion of the main antenna element 16 are denoted by reference numerals 42 and 44 in FIG. Further, an eleventh linear conductor forming the bent structure portion of the auxiliary element 26 is indicated by a reference number 46 in FIG.
図６に示す実施例３の車両用ガラスアンテナの各線状導体の長さは、以下の長さである。
第１の線状導体： ８０ｍｍ
第２の線状導体： ４５ｍｍ
第３の線状導体： １４０ｍｍ
第９の線状導体： １０ｍｍ
第１０の線状導体： １４０ｍｍ
第４の線状導体： ３０ｍｍ
第５の線状導体： １１５ｍｍ
第１１の線状導体： ３０ｍｍ
また、給電点１４と接続点２４との間の距離は、２５ｍｍである。このような寸法とすることによりデジタルTV周波数全域に対して良好な特性を持つアンテナが実現できる。
The length of each linear conductor of the glass antenna for a vehicle of Example 3 shown in FIG. 6 is the following length.
First linear conductor: 80 mm
Second linear conductor: 45mm
Third linear conductor: 140 mm
Ninth linear conductor: 10 mm
Tenth linear conductor: 140 mm
Fourth linear conductor: 30 mm
Fifth linear conductor: 115mm
Eleventh linear conductor: 30 mm
The distance between the feeding point 14 and the connection point 24 is 25 mm. By setting the dimensions as described above, an antenna having good characteristics over the entire digital TV frequency can be realized.
本実施例の車両用ガラスアンテナの各線状導体の長さは、前述した長さに限定されるものではない。例えば、以下の範囲の寸法としても好適なガラスアンテナが得られる。
第１の線状導体： ６０〜１１０ｍｍ
第２の線状導体： ２０〜６０ｍｍ
第３の線状導体： １２０〜１６０ｍｍ
第９の線状導体： ５〜２０ｍｍ
第１０の線状導体：１２０〜１６０ｍｍ
第４の線状導体： ２０〜４０ｍｍ
第５の線状導体： １２０〜１８０ｍｍ
第１１の線状導体： ０〜５０ｍｍ
給電点１４と接続点２４との間の距離： １５〜３５ｍｍ
第１の線状導体の長さを６０〜１１０ｍｍの長さとすることにより、車両用ガラスアンテナにより受信する周波数帯域の高周波側の波長の約４分の１波長の長さとすることができ、高周波側の受信感度が良くなる。
The length of each linear conductor of the glass antenna for a vehicle of the present embodiment is not limited to the length described above. For example, a glass antenna suitable for dimensions in the following range can be obtained.
First linear conductor: 60 to 110 mm
Second linear conductor: 20 to 60 mm
Third linear conductor: 120 to 160 mm
Ninth linear conductor: 5 to 20 mm
Tenth linear conductor: 120 to 160 mm
Fourth linear conductor: 20 to 40 mm
Fifth linear conductor: 120 to 180 mm
Eleventh linear conductor: 0 to 50 mm
Distance between feeding point 14 and connection point 24: 15 to 35 mm
By setting the length of the first linear conductor to a length of 60 to 110 mm, the length of the wavelength on the high frequency side of the frequency band received by the glass antenna for a vehicle can be set to about a quarter wavelength. The reception sensitivity on the side is improved.
また、第４、第５、第１１の線状導体２７，２８，４６のそれぞれの長さの合計を１２０〜１８０ｍｍとすることにより、車両用ガラスアンテナにより受信する周波数帯域の低周波側の波長の約４分の１波長の長さとすることができ、低周波側の受信感度が良くなる。 Further, by setting the total length of each of the fourth, fifth, and eleventh linear conductors 27, 28, and 46 to 120 to 180 mm, the wavelength on the low frequency side of the frequency band received by the vehicle glass antenna. About a quarter wavelength, and the reception sensitivity on the low frequency side is improved.
さらに、給電点１４と接続点２４との間の距離を１５〜３５ｍｍとすることにより、２つの線状導体を不整合なく接続することができ、デジタルＴＶの主要局が使用する波長５２０〜５７０ＭＨｚの感度が良好となる。 Furthermore, by setting the distance between the feeding point 14 and the connection point 24 to 15 to 35 mm, the two linear conductors can be connected without mismatch, and the wavelength of 520 to 570 MHz used by the main station of the digital TV. The sensitivity of is improved.
本実施例の車両用ガラスアンテナの第１、第２、第３の線状導体１８，２０，２２のそれぞれの長さの合計は、２００〜２８０ｍｍとすることが好ましい。このような長さとすることにより、高周波数側の波長の約３／４波長の長さとすることができ、高域側の受信感度がよくなる。 The total length of each of the first, second, and third linear conductors 18, 20, and 22 of the vehicle glass antenna of this embodiment is preferably 200 to 280 mm. By adopting such a length, it is possible to make the length about 3/4 of the wavelength on the high frequency side, and the reception sensitivity on the high frequency side is improved.
図６に示した本実施例の車両用ガラスアンテナにおける補助素子の効果を確かめるために、補助素子２６のない主アンテナ素子１６および無給電素子３０のみのアンテナを用意し、このアンテナと本実施例のアンテナとの感度を測定した。図７に、測定結果を示す。補助素子のある方が、低周波側で感度が高くなっている。このことから、補助素子を設けることによって、広帯域化が可能となることがわかる。 In order to confirm the effect of the auxiliary element in the glass antenna for the vehicle of this embodiment shown in FIG. 6, an antenna having only the main antenna element 16 and the parasitic element 30 without the auxiliary element 26 is prepared. The sensitivity with the antenna was measured. FIG. 7 shows the measurement results. The sensitivity with the auxiliary element is higher on the low frequency side. From this, it can be seen that providing an auxiliary element makes it possible to widen the bandwidth.
また、実施例１と同様に、アンテナ素子および無給電素子の大部分が、遮蔽膜１２で隠されており、フロントガラスの美観を損なわない。 Further, as in the first embodiment, most of the antenna element and the parasitic element are hidden by the shielding film 12, and the appearance of the windshield is not impaired.
また、図６には遮蔽層を示していないが、実施例１，２と同様に、アンテナ素子および無給電素子の大部分を遮蔽膜で隠して、フロントガラスの美観を損なわないようにすることができる。 In addition, although the shielding layer is not shown in FIG. 6, as in the first and second embodiments, most of the antenna element and the parasitic element are hidden by the shielding film so as not to impair the aesthetics of the windshield. Can do.
以上の各実施例では、本発明の車両用ガラスアンテナを、フロントガラスに設けた場合について説明したが、リアガラスに設けることもできる。また、本発明の車両用ガラスアンテナは、フロントガラスまたはリアガラスの片側または両側に設けることができる。 In each of the above embodiments, the case where the glass antenna for a vehicle of the present invention is provided on the windshield has been described, but it can also be provided on the rear glass. Moreover, the glass antenna for vehicles of this invention can be provided in the one side or both sides of a windshield or a rear glass.
１０ フロントガラス
１２ 遮蔽膜
１４ 給電点
１６ 主アンテナ素子
１８ 第１の線状導体
２０ 第２の線状導体
２２ 第３の線状導体
２７ 第４の線状導体
２８ 第５の線状導体
３０ 無給電素子
３２ 第６の線状導体
３４ 第７の線状導体
３６ 第８の線状導体
４０ ピラー
４２ 第９の線状導体
４４ 第１０の線状導体
４６ 第１１の線状導体
10 windshield 12 shielding film 14 feeding point
16 Main antenna element 18 First linear conductor 20 Second linear conductor 22 Third linear conductor 27 Fourth linear conductor 28 Fifth linear conductor 30 Parasitic element 32 Sixth linear conductor 34 7th linear conductor 36 8th linear conductor 40 Pillar 42 9th linear conductor 44 10th linear conductor 46 11th linear conductor
Claims (3)
給電点と、
前記給電点に一端が接続された主アンテナ素子と、
前記主アンテナ素子に接続された補助素子とを有し、
前記主アンテナ素子は、一端が前記給電点に接続され、横方向に延びる第１の線状導体と、この第１の線状導体の他端から下方に縦方向に延びる第２の線状導体と、この第２の線状導体の他端から前記第１の線状導体に対して略平行に横方向に延びる第３の線状導体とを備え、
前記補助素子は、前記第1の線状導体の前記給電点の近傍に一端が接続され、接続された位置から下方に縦方向に延びる第４の線状導体と、この第４の線状導体の他端から前記第２の線状導体とは反対側の方向へ、前記第1および第３の線状導体と略平行に横方向に延びる第５の線状導体を備える車両用ガラスアンテナであって、
前記第２の線状導体と対向するとともに高周波的に容量結合する無給電素子を有する、ことを特徴とする車両用ガラスアンテナ。 A vehicle glass antenna for forming on the surface of a vehicle window glass ,
A feeding point;
A main antenna element having one end connected to the feed point;
An auxiliary element connected to the main antenna element,
The main antenna element has a first linear conductor having one end connected to the feeding point and extending in the lateral direction, and a second linear conductor extending vertically from the other end of the first linear conductor. And a third linear conductor extending in a lateral direction substantially parallel to the first linear conductor from the other end of the second linear conductor,
The auxiliary element has one end connected to the vicinity of the feeding point of the first linear conductor, a fourth linear conductor extending vertically from the connected position, and the fourth linear conductor. A glass antenna for a vehicle, comprising: a fifth linear conductor extending laterally from the other end of the first side to the direction opposite to the second linear conductor, substantially parallel to the first and third linear conductors There,
A glass antenna for a vehicle , comprising: a parasitic element facing the second linear conductor and capacitively coupling in a high frequency manner .
給電点と、
前記給電点に一端が接続された主アンテナ素子と、
前記主アンテナ素子に接続された補助素子とを有し、
前記主アンテナ素子は、一端が前記給電点に接続され、横方向に延びる第１の線状導体と、この第１の線状導体の他端から下方に縦方向に延びる第２の線状導体と、この第２の線状導体の他端から前記第１の線状導体に対して略平行に横方向に延びる第３の線状導体とを備え、
前記補助素子は、前記第1の線状導体の前記給電点の近傍に一端が接続され、接続された位置から下方に縦方向に延びる第４の線状導体と、この第４の線状導体の他端から前記第２の線状導体とは反対側の方向へ、前記第1および第３の線状導体と略平行に横方向に延びる第５の線状導体を備える車両用ガラスアンテナであって、
前記主アンテナ素子は、前記第３の線状導体の他端から下方に縦方向に延びる第９の線状導体と、この第９の線状導体の他端から前記第３の線状導体と略平行に横方向に延びる第１０の線状導体をさらに有し、
前記補助素子は、前記第５の線状導体の他端から下方に縦方向に延びる第１１の線状導体をさらに有する、ことを特徴とする車両用ガラスアンテナ。 A vehicle glass antenna for forming on the surface of a vehicle window glass,
A feeding point;
A main antenna element having one end connected to the feed point;
An auxiliary element connected to the main antenna element,
The main antenna element has a first linear conductor having one end connected to the feeding point and extending in the lateral direction, and a second linear conductor extending vertically from the other end of the first linear conductor. And a third linear conductor extending in a lateral direction substantially parallel to the first linear conductor from the other end of the second linear conductor,
The auxiliary element has one end connected to the vicinity of the feeding point of the first linear conductor, a fourth linear conductor extending vertically from the connected position, and the fourth linear conductor. A glass antenna for a vehicle, comprising: a fifth linear conductor extending laterally from the other end of the first side to the direction opposite to the second linear conductor, substantially parallel to the first and third linear conductors There,
The main antenna element includes a ninth linear conductor extending vertically from the other end of the third linear conductor, and the third linear conductor from the other end of the ninth linear conductor. A tenth linear conductor extending in the lateral direction substantially in parallel;
The auxiliary antenna further includes an eleventh linear conductor extending vertically downward from the other end of the fifth linear conductor .
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| JP2008099319A JP5061015B2 (en) | 2008-04-07 | 2008-04-07 | Glass antenna for vehicles |
| DE200910016251 DE102009016251A1 (en) | 2008-04-07 | 2009-04-03 | On-board antenna for use in motor vehicle for receiving programs of digital terrestrial TV, has auxiliary element including linear conductor that extends horizontally from end of another conductor to third conductor in opposite direction |
| FR0952231A FR2929763A1 (en) | 2008-04-07 | 2009-04-06 | ANTENNA EMBARQUEE |
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| JP2008099319A JP5061015B2 (en) | 2008-04-07 | 2008-04-07 | Glass antenna for vehicles |
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| JP5061015B2 true JP5061015B2 (en) | 2012-10-31 |
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| US11180612B2 (en) | 2018-08-24 | 2021-11-23 | Samsung Electronics Co., Ltd. | Triazine ring-containing polymer, and thermoplastic article and optical component including the same |
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| JP5633295B2 (en) * | 2010-10-13 | 2014-12-03 | セントラル硝子株式会社 | Vehicle antenna |
| BR112013013267A2 (en) * | 2010-11-29 | 2016-09-13 | Asahi Glass Co Ltd | integrated windscreen antenna for vehicle use and glazing for vehicle use |
| JPWO2014104365A1 (en) * | 2012-12-27 | 2017-01-19 | 旭硝子株式会社 | Vehicle windshield with glass antenna |
| JP2017060069A (en) * | 2015-09-18 | 2017-03-23 | セントラル硝子株式会社 | Glass antenna for receiving terrestrial digital tv broadcast waves |
| JP6847944B2 (en) * | 2016-07-01 | 2021-03-24 | 日本板硝子株式会社 | Vehicle window glass |
| JP7393603B2 (en) | 2018-11-26 | 2023-12-07 | Ａｇｃ株式会社 | Antenna design support device, antenna design support program, and antenna design support method |
| WO2024023031A1 (en) * | 2022-07-27 | 2024-02-01 | Agc Glass Europe | Wire-like antenna for vehicle glazing |
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| JPH09214228A (en) * | 1996-01-31 | 1997-08-15 | Central Glass Co Ltd | Glass antenna for vehicle |
| JP3619093B2 (en) * | 1999-12-09 | 2005-02-09 | セントラル硝子株式会社 | Glass antenna for vehicles |
| JP4141979B2 (en) * | 2004-04-16 | 2008-08-27 | 日本板硝子株式会社 | High frequency glass antenna for automobile |
| JP4410131B2 (en) * | 2005-03-23 | 2010-02-03 | 日本板硝子株式会社 | Vehicle glass antenna and vehicle equipped with vehicle glass antenna |
| JP4946639B2 (en) | 2006-06-12 | 2012-06-06 | 旭硝子株式会社 | High frequency glass antenna for automobile |
| JP4803004B2 (en) * | 2006-11-28 | 2011-10-26 | 旭硝子株式会社 | High frequency glass antenna for automobile and window glass plate |
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| US11180612B2 (en) | 2018-08-24 | 2021-11-23 | Samsung Electronics Co., Ltd. | Triazine ring-containing polymer, and thermoplastic article and optical component including the same |
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| JP2009253677A (en) | 2009-10-29 |
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