JP2005229140A - Antenna for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna arranged on an insulating body such as the surface of window glass or a resin body of a vehicle and suitable for receiving a radio wave with a frequency of a VHF band or over and transmitting / receiving radio waves of cellular phones, mobile phones, personal and professional wireless apparatuses, and personal handyphone systems or the like. <P>SOLUTION: The antenna for a vehicle is a wire antenna arranged on the surface of the window glass of a mobile body such as an automobile, arranged on the surface of the insulating member of the body, and comprises: a first element having a length of 1/4 or 3/4 of the wavelength of a transmitting/receiving radio wave extended from a first feeding point; and a second closed loop element having a length extended from a second feeding point, provided in the vicinity of the first feeding point, while surrounding the first element not shorter than one wavelength of the transmitting/receiving radio wave. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a wire antenna disposed on a window glass surface of a moving body such as an automobile or an insulating member of a body, and receives FM radio broadcast waves, digital radio broadcast waves, television broadcast waves, and automobiles. The present invention relates to an antenna suitable for transmission / reception of radio waves of ultra-high frequency band or higher, such as a telephone, a mobile phone, a personal radio, a business radio, and a PHS (Personal Handy phone System).

  Conventionally, pole antennas have been put into practical use and widely used as antennas for transmission / reception of automobile phones and mobile phones, and for reception of television broadcast waves, but these pole antennas have a structure protruding from the vehicle body. Therefore, it is not only unfavorable in terms of safety and appearance, but also has drawbacks such as a hindrance during car washing and a possibility of breakage.

  Therefore, in recent years, as an antenna without protrusions, a glass antenna provided by directly printing an antenna pattern on a window glass of an automobile, or an antenna in which a sticker or sheet printed with an antenna pattern is attached to the window glass is desired, It has been put into practical use.

  Glass antennas and seal antennas that have been put to practical use as antennas for automobile phones and mobile phones have come to be put into practical use that have transmission / reception gains equivalent to those of pole antennas.

  For example, Japanese Patent Laid-Open No. Hei 6-152216 discloses a radiation pattern having a length of about 1/4 wavelength in the vertical direction on the glass surface and a grounding pattern having a length of about 1/4 wavelength in the horizontal direction on the glass surface. When the grounding pattern is provided on at least one of the left and right ends of the glass surface, and the grounding pattern is provided on the left end, the radiation pattern is disposed near the left side of the grounding pattern, and the grounding pattern is disposed on the right end. A glass antenna for an automobile telephone is disclosed in which a radiation pattern is disposed close to the right side of the grounding pattern when the grounding pattern is provided, and the grounding pattern has a hollow shape (Patent Document 1). ).

  Japanese Patent Application Laid-Open No. 6-314921 discloses a glass antenna for a vehicle disposed on a vehicle window glass, a first element in which a horizontal line is connected to a tip of a vertical line, and a tip of the vertical line. A horizontal line connected to the other and another horizontal line are arranged close to each other so as to sandwich the horizontal line of the first element, and the end of the first element is wrapped by these two horizontal lines. There is disclosed a glass antenna for a vehicle characterized by comprising at least a second element connected in such a manner (Patent Document 2).

  Further, in Japanese Patent Application Laid-Open No. 8-148921, in a glass antenna device for a car phone formed by using a conductor pattern on a window glass for a car, the center is the same outside the circular radiation pattern and the radiation pattern. There is disclosed a glass antenna device for a car phone characterized by being formed with a donut-shaped grounding pattern (Patent Document 3).

  On the other hand, a glass antenna that has been put into practical use as a vehicle glass antenna for receiving television broadcast waves has been put into practical use and has the same reception performance and gain as those of a pole antenna.

  For example, Japanese Patent Application Laid-Open No. 7-263934 discloses a glass antenna for a vehicle disposed in an upper margin of an antifogging heating filament of a rear window glass for a vehicle, and is composed of a horizontal filament and a vertical filament. The first antenna is a left half region or a right half region of the window glass, and extends vertically from a part of the main element mainly composed of horizontal stripes in the margin of the first antenna. A vehicular glass antenna is disclosed in which a horizontally-long rectangular element is connected to a line extending in a straight line, and a second antenna that feeds power from a part of a short side of the rectangular element at a lateral side of the drawer is provided ( Patent Document 4).

  Japanese Patent Application Laid-Open No. 2001-119223 discloses a glass antenna that suitably receives radio waves in the entire TV band, particularly regarding a glass antenna provided on a side window for a vehicle (Patent Document 5).

Further, JP 2001-332923 A discloses a film antenna that is provided with a rectangular flat film antenna element on glass supported by a conductive frame, and that preferably receives radio waves in the entire TV band. (Patent Document 6).
JP-A-6-152216 JP-A-6-314921 JP-A-8-148922 JP 7-263934 A JP 2001-119223 A JP 2001-332923 A

  However, any of the glass antennas for automobile phones or mobile phones as shown in Patent Documents 1 to 3 and TV broadcast wave glass antennas as shown in Patent Documents 4 to 6 are antennas. Because the antenna performance is easily affected by the installation location of the antenna and the structure around the antenna, the antenna element must be adjusted and the antenna installation position must be adjusted for each vehicle. The antenna performance changed greatly due to the influence.

  In addition, the glass antenna for a car phone or a mobile phone shown in Patent Documents 1 to 6 has a lower gain than a pole antenna, and further improvement of the antenna gain is desired. The TV broadcast wave glass antenna shown in Patent Document 6 not only needs to be grounded near the antenna feeding point, but also has a limited antenna installation condition with respect to the reception frequency. Document 4 is limited to a rear window such as an automobile, Patent Document 5 is limited to a side window, and Patent Document 6 is limited to a large window or door of a structure such as a building.

  In particular, for the TV broadcast wave glass antennas disclosed in Patent Documents 4 to 5, it has been difficult to match the antenna impedance to the receiver input impedance over the entire TV broadcast wave reception band.

  The present invention has been made in view of such problems, and is less susceptible to the antenna performance due to the installation location of the antenna and the human body, reduces the substantial antenna area, and more than the conventional antenna. It is suitable as an antenna for car phone and mobile phone, digital radio broadcast wave and TV broadcast wave reception that can improve performance, and it can also transmit and receive radio waves for personal radio, commercial radio, PHS, etc. An object of the present invention is to provide a vehicular antenna that is possible and is not easily caught by a position on a window glass surface on which the antenna is disposed.

  That is, the present invention is a linear antenna disposed on a window glass surface of a moving body such as an automobile or the surface of an insulating member of a body, and is a quarter wavelength or 3/4 of a transmission / reception radio wave extending from a first feeding point. 1 wavelength of the transmission / reception electric wave which provided the 2nd feeding point in the vicinity of the 1st element of the length of a wavelength, and the said 1st feeding point, and was extended so that the 1st element might be surrounded from this 2nd feeding point A vehicular antenna comprising the second element in a closed loop shape having the above length.

  Alternatively, according to the present invention, the line portion extending from the first feeding point of the first element is close to the closed loop line of the second element with a length of 1/8 wavelength or less of transmission / reception radio waves, and capacitively coupled. The above-mentioned vehicular antenna, comprising: a first linear portion that is configured to extend from a tip of the first linear portion in a direction away from the second element.

  Alternatively, according to the present invention, a portion separated by a quarter wavelength of the transmission / reception radio wave along a linear portion extending from the second feeding point of the second element is the first feeding point of the first element. The above-mentioned vehicle antenna is characterized in that it is disposed at a distance of 1/32 wavelength or more from the opposite end.

  Alternatively, the present invention is characterized in that a feeding point of the second element in the closed loop shape is provided at the leading end of the leader line along the closed loop, and the length of the leader line is set to ¼ wavelength or less of transmission / reception radio waves. The vehicle antenna according to any one of the above.

  Alternatively, in the present invention, instead of bringing the first feeding point and the second feeding point close to each other, a metal terminal is placed on at least one feeding point of the first feeding point and the second feeding point. The vehicle antenna according to any one of the above, wherein either one of the feeding point or the metal terminal on one side is disposed so as to be close to the feeding point or the metal terminal on the other side.

  Alternatively, according to the present invention, the first wire portion having a length of 1/8 wavelength or less of transmitted / received radio waves from the first feeding point of the first element has a distance of 0.1 to 10 mm from the second element. The vehicle antenna according to any one of the above, wherein the vehicle antenna is adjacent to the vehicle.

  Alternatively, the present invention provides the vehicle antenna according to any one of the above, wherein the length of the closed loop line portion of the second element is not less than 1 wavelength and not more than 4 wavelengths of the transmission / reception radio wave. It is.

  Alternatively, in the present invention, the length of the closed-loop line portion of the second element is set to (1 + n / 2) λ (n is an integer of 0 to 6) when the wavelength of the transmission / reception radio wave is λ. This is the vehicle antenna described above.

  Alternatively, the present invention is characterized in that the antenna pattern is directly printed on a surface made of an insulating member of a window glass or body of a moving body such as an automobile, or a sticker or sheet on which the pattern is printed is pasted. The vehicle antenna according to any one of the above.

  Alternatively, in the present invention, a plurality of first elements are disposed inside the closed loop second element, and each first feeding point of the plurality of first elements is the closed loop second element. The vehicle antenna according to any one of the above-described features, wherein the vehicle antenna is provided so as to be in the vicinity of the second feeding point of the element.

  ADVANTAGE OF THE INVENTION According to this invention, it can be made hard to receive to the influence on the antenna performance by an antenna installation place, a human body, etc., and a substantial antenna area can be made small.

  It is also suitable as an antenna for car phones and mobile phones that can improve the antenna performance more than before, and an antenna for receiving TV broadcast waves, and also for transmitting and receiving radio waves such as personal radio, commercial radio, and PHS. Is also possible.

  Furthermore, it is possible to provide a vehicle antenna that is hardly affected by the position on the window glass surface on which the antenna is disposed.

  Furthermore, the present invention can provide a high-performance antenna with a simple and compact configuration.

  In particular, it can provide simple and high-performance antennas for digital TV broadcasting and telematics.

  Also, not only as a glass antenna that prints directly on the vehicle inner surface of the window glass of a vehicle, but also a so-called seal that sticks a thin film-like seal or sheet printed on a window glass surface or an insulating member of the body Since it can be an antenna, it is easy to mount.

  A first element 3 having a length of 1/4 wavelength or 3/4 wavelength of a frequency band of transmission / reception radio waves is provided from the first feeding point 10, and a second feeding point 11 is provided in the vicinity of the first feeding point 10. A closed loop second element 4 having a length equal to or longer than one wavelength of the transmission / reception radio wave is provided so as to surround the first element 3 from the second feeding point 11, and the first feeding point 10 And the internal conducting wire 12a and the external conducting wire 12b of the coaxial cable 12 were connected to the second feeding point 11, respectively.

  As shown in FIGS. 12, 13, 15, and 16, the first element 3 has a line portion extending from the first feeding point 10 close to the closed loop line of the second element 4. The first linear portion 3a that is capacitively coupled, and the second linear portion 3b that extends from the tip of the first linear portion 3a and is disposed away from the second element 4, and the first linear portion 3a The length of the linear portion 3a is preferably set to a length equal to or shorter than 1/8 wavelength of the transmitted / received radio wave. As the shape of the first linear portion 3a and the second linear portion 3b connected to each other, FIGS. 15 and FIG. 16, although the substantially L shape was shown, the 1st filament part 3a and the 2nd filament part 3b may not necessarily be a linear shape, and a circular arc shape may be sufficient as it.

  On the other hand, in the patterns as shown in FIG. 1 to FIG. 7 and FIG. 14, the first element 3 has the length of the first wire portion 3 a extending from the first feeding point 10 as zero, A pattern in which all the filaments extending from the connecting portion with the first feeding point 10 are arranged so as to be separated from the closed loop filaments of the second element 4, that is, in the vertical direction and the horizontal direction from the first feeding point 10. Further, it may be a line having an oblique direction, a bent crank shape, a key shape, or an arc shape.

  Further, a portion that is separated from the second feeding point by the length of a quarter wavelength of the transmission / reception radio wave along the second element 4 is opposite to the first feeding point of the first element 3. It is preferable to dispose the end portion away from the 1/32 wavelength of the transmitted / received radio wave.

  Further, the second element 4 has a closed loop shape, and the outer shape pattern surrounded by the closed loop may be any shape such as a substantially rhombus shape, a substantially rectangular shape, a substantially circular shape, or a substantially L shape, and the attachment position Can be freely deformed.

  Furthermore, as shown in FIGS. 14 and 15, the second element 4 is connected to the closed loop line from the tip thereof through a lead line 4 a along the closed loop line of the second element 4 from the feeding point 11. In this case, the length of the lead wire 4a is preferably equal to or less than ¼ wavelength of the transmitted / received radio wave.

  Further, the first feeding point and the second feeding point are brought close to each other. Instead, a metal terminal is placed on at least one feeding point of the first feeding point and the second feeding point. Either the feeding point or the metal terminal may be disposed so as to be close to the other feeding point or the metal terminal.

  That is, instead of the second feeding point 11 provided in the vicinity of the first feeding point 10 as shown in FIGS. 12 to 15, it is mounted on the second feeding point 11 as shown in FIG. 16. You may arrange | position so that the terminal metal fitting part of the metal terminal 21 which was placed and fixedly fixed may be adjoined to the 1st electric power feeding point 10. FIG.

  The first wire 3a having a length of 1/8 wavelength or less of transmitted / received radio waves from the first feeding point 10 of the first element 3 is spaced from the closed loop wire 4b of the second element 4. It is desirable to make it approach in the range of 0.1-10 mm.

  The length of the closed-loop line 4b of the second element 4 is preferably within the range of 1 wavelength or more and 4 wavelengths or less of transmission / reception radio waves, but the length is (1 + n). / 2) When λ (n is an integer of 0 to 6), better reception characteristics can be obtained.

  As the window glass of the automobile and the like, it may be provided on any of the window glass of the front window glass, rear window glass, side window glass, sunroof, etc. of the automobile, and the window glass is not only a glass plate, A case of a transparent resin plate or a composite of a glass plate and a transparent resin plate is also included.

  Also, the body of the moving body is usually made of metal, but when the roof, the rear door, and some other members are made of an insulating member such as a resin, or the insulating member made of a resin such as a bumper or a spoiler The glass antenna 2 of the present invention can be provided on such an insulating member.

  The antenna may be printed directly on the surface of a member made of an insulating material of a window glass 1 or a body of a moving body such as an automobile with a conductive paste, or a seal or sheet on which the antenna pattern is printed may be used. You may make it stick on the site | part which consists of insulating materials.

  In addition, the antenna 2 may be provided at only one location, but diversity reception can be achieved by providing the antenna 2 at a plurality of locations. In this case, the same pattern or different patterns may be used.

  Further, a plurality of the first elements 3 described above may be disposed in the second element 4 having a closed loop shape. In this case, the patterns of the first elements 3 may be the same pattern or different patterns.

  Further, the first elements 3 and 3 ′ arranged at a plurality of locations in the closed-loop second element 4 may have the same or different frequency bands to be received.

  The operation of the present invention will be described below.

  Desirably, the first element 3 is a strip having a length of 1/4 wavelength or 3/4 wavelength of the transmitted / received radio wave, and the second element 4 is in a closed loop shape having a length of one wavelength or more. The reason is that the second element 4 is regarded as a pseudo ground antenna by setting it to one or more wavelengths of transmission / reception radio waves, and the size of the antenna is reduced. This is because it becomes possible to efficiently transmit and receive radio waves in the same manner as the grounded antenna by using a line having a length of 1/4 wavelength or 3/4 wavelength.

  Further, by forming the second element 4 in a closed loop shape, the electric field at the tip of the antenna that is susceptible to external influences can be stabilized, and the influence of the human body or the like can be reduced.

  Also, good results can be obtained for the first element 3 arranged as far as possible from the second element 4 as shown in FIG. 1 to FIG. As shown in FIGS. 15 and 16, the wire portion capacitively coupled adjacent to the closed loop wire of the second element 4 and the second element 4 are separated from the tip of the first wire portion 3 a. Since the pattern which consists of the 2nd filament 3b extended in the direction can adjust antenna impedance, it can perform more efficient transmission / reception.

  On the other hand, as shown in FIGS. 12, 13, 15, and 16, the first element 3 extends from the first feeding point 10 and has a length of 1/8 wavelength or less of transmission / reception radio waves. A strip portion in which the strip portion 3a is capacitively coupled close to the closed loop strip of the second element 4, and a second wire in a direction away from the second element 4 from the tip of the first strip portion 3a. By making it the substantially L shape which extended the stripe part 3b, the length of the 2nd filament part 3b extended in the direction away from the 2nd element 4 becomes short as a result, and the 2nd filament part 3b and the 2nd Since the distance between the second element 4 and the second element 4 can be sufficiently separated, good transmission / reception performance can be obtained even if the length of the second element 4 is shortened.

  Alternatively, the portion separated from the second feeding point 11 by the length of a quarter wavelength of the transmitted / received radio wave along the second element 4 is different from the first feeding point 10 of the first element 3. The reason why it is preferable to dispose at least 1/32 wavelength of the transmitted / received radio wave from the opposite end is to allow the radio wave to be transmitted and received far enough, and it is preferable to dispose as far as possible. .

  In addition, the antenna of the present invention is an antenna having a wide band performance. However, if the length of each filament of the first element 3 and the second element 4 is selected with respect to the frequency to be transmitted and received, the selection is made. A very high gain can be obtained for the selected frequency.

  On the other hand, the antenna of the present invention is an antenna having a wide band performance, but by selecting the lengths of the filaments of the first element 3 and the second element 4 with respect to different frequencies, And it can be set as a higher gain antenna over the wide band of the frequency before and behind that.

  In addition, since the antenna of the present invention is regarded as a pseudo ground antenna by setting the length of the closed-loop line portion of the second element 4 to one or more wavelengths of the transmitted / received radio wave, the metal body is used at a relatively high frequency. It is also possible to make the situation equivalent to a configuration in which the grounding is performed.

  Furthermore, as shown in FIGS. 14 and 15, the closed loop line of the feeding point 11 and the second element 4 is connected via the lead line 4 a extending so as to be close to the closed loop line. In order to adjust the antenna impedance, the length of the lead wire 4a is set to ¼ wavelength or less of the transmitted / received radio wave, which makes it easy to adjust the antenna impedance over a wide band and provides good reception. This is because a gain can be obtained. If the length of the lead wire 4a is longer than a quarter wavelength of the transmission / reception radio wave, it is difficult to adjust the antenna impedance over a wide band, and a good reception gain cannot be obtained. .

  Further, as shown in FIG. 16, when the metal terminal portion of the metal terminal 21 is placed and fixed on the second feeding point 11, the metal terminal 21 is close to the first feeding point 10. Even if the second feeding point 11 is not close to the first feeding point 10, the metal terminal 21 connected on the second feeding point is close to the feeding point 10, thereby obtaining the same effect. It is done.

  The metal terminal 21 has either the first feeding point 10 or the second feeding point 11 when the first feeding point 10 and the second feeding point 11 are separated from each other and grounded. It may be placed and fixed on the feeding point and arranged so as to be close to the other feeding point, but may be arranged so as to be close to both feeding points.

  It is desirable that the distance between the first filament 3a of the first element 3 and the closed loop filament 4b of the second element 4 be in the range of 0.1 to 10 mm. The antenna impedance is adjusted by the distance between the adjacent linear portions of the first linear portion 3a of the first element 3 and the closed loop linear portion 4b of the second element 4, and the interval is 10 mm. This is because it is difficult to adjust the impedance if they are provided apart from each other.

  Further, if the length of the closed-loop line 4b of the second element 4 is within the range of 1 wavelength or more and 4 wavelengths or less of the transmission / reception radio wave, the line length is 1/2 of the transmission / reception radio wave. A good reception gain can be obtained even if the value deviates from an integer multiple of the wavelength. However, if (1 + n / 2) λ (λ is the wavelength of the transmitted / received radio wave, n is an integer of 0 to 6), the second element Since 4 can be regarded as pseudo-equivalent to the maximum value, even better reception characteristics can be obtained.

  Even if a plurality of the first elements 3 are disposed in the second element 4 in the closed loop shape, the second element 4 is in a closed loop shape, and the second element 4 is connected to each of the first elements 3. By setting the length to be equal to or longer than one wavelength of the transmission / reception radio wave, the first element 3 disposed at a plurality of positions can operate independently, and the antenna 2 including the first element 3 and the second element 4 is provided. The second antenna 4 can be shared by acting as if a plurality of antennas are arranged.

  In addition, since it is desirable that the two second feeding points 11 and 11 ′ of the second element 4 are in the vicinity of the first feeding points 10 and 10 ′, respectively, two feeding points are provided for the second element 4. 11 and 11 ′ are provided, but the second elements 3 and 3 ′ are preferably arranged so as not to affect transmission and reception, and the two first feeding points 10 and 10 ′ of the second element 4 are connected to each other. It is preferable to provide a quarter wavelength or more apart.

Various embodiments of the present invention will be described below.
[Example 1]
FIG. 1 is a view of an antenna pattern of the present invention provided on a side window glass 1 of an automobile and viewed from the outside of the vehicle.

  In the pattern shown in FIG. 2, the first element 3 and the second element 4 are printed and baked on the inner surface of the glass 1 or the pattern printed on a seal or sheet is pasted on the surface of an insulating member such as a body. It is used as an antenna for a cellular phone band having a frequency band of 800 MHz.

  A second feeding point 11 is provided in the vicinity of the first feeding point 10 and its lower part, and a vertical line corresponding to the length of a quarter wavelength of transmission / reception radio waves is formed in the vertical direction above the first feeding point 10. The first element 3 was extended.

  The antenna 2 is provided by printing directly on the indoor side of the window glass 1 or by sticking a sticker or a sheet printed thereon, and the wavelength reduction rate of the glass plate 1 at a frequency of 800 MHz is about 0.6. The length of the first element 3 was set to a quarter wavelength, that is, a vertical line having a length of 55 mm. The second feeding point 11 is disposed at a substantially middle position on the lower side b of the second element 4.

  The second element 4 is provided in a closed loop so as to surround the first element 3 from the second feeding point 11, and the total length of the entire circumference of the second element 4 is the wavelength of the transmission / reception frequency. Although the length is equivalent to twice, the transmission / reception frequency band is set to a length corresponding to two wavelengths of a frequency of 850 MHz different from that of the first element 3 in order to increase the gain over a wider band.

  Therefore, assuming that the wavelength reduction rate of the glass plate at a frequency of 850 MHz is about 0.6, the length of the vertical sides a and c is 90 mm, the length of the horizontal sides b and d is 120 mm, and the total circumference length is 420 mm. The shape was rectangular.

  The second element 4 was positioned 15 mm away from the inside of the metal flange 20 of the side window glass.

  Furthermore, the internal conducting wire 12 a of the coaxial cable 12 was connected to the first feeding point 10, and the external conducting wire 12 b was connected to the second feeding point 11.

  The antenna 2 in which the first element 3 and the second element 4 are arranged as described above was adjusted so that the transmission / reception gain in the 800 MHz mobile phone band was high.

  The antenna of FIG. 2 arranged in this way is represented by a gain ratio (hereinafter abbreviated as “dipole antenna ratio”) when the gain of the dipole antenna is 0 dB, as shown in the frequency characteristic diagram of FIG. The average of the band was -6.1 dB, and a good result exceeding the transmission / reception gain of -10.0 dB, which is the average of conventional glass antennas used in practical use, was obtained.

In addition, the antenna shown in FIG. 2 obtained in this way has a simple configuration with almost no change in antenna impedance even when a person is in the vehicle, and the visual field is impaired. It can be seen that the antenna can be provided with no gain, has a high gain, and is sufficiently practical.
[Example 2]
The second embodiment is a modification of the pattern of the first embodiment. The length of the first element 3 is set to 3/4 wavelength of the transmission / reception radio wave, and the entire circumference of the second element 4 is set to 3 wavelengths. The second element 4 is a vertically long rectangle as shown in FIG. 3, and the antenna pattern of the present invention is disposed on the inner surface of the glass surface of the vehicle.

  That is, the length of the first element 3 is a line corresponding to the length of 3/4 wavelength of transmission / reception radio waves from the first feeding point 10 with respect to a frequency of 800 MHz, that is, a glass plate at a frequency of 800 MHz. When the wavelength shortening rate is about 0.6, the length is 165 mm, and the first element 3 is provided in the vertical direction to form a vertical line.

  The second element 4 has a length corresponding to three times the wavelength of the transmission / reception frequency. However, in order to increase the gain over a wide band as in the first embodiment, the second element 4 has a frequency of 850 MHz, which is different from the first element 3. The length was adjusted to the wavelength.

  The total perimeter is a length corresponding to three wavelengths. If the wavelength reduction rate of the glass plate at a frequency of 850 MHz is about 0.6, the total perimeter is 640 mm, and the lengths of the vertical sides a and c are 200 mm. The length of the lateral sides b and d was 120 mm.

  Further, the second feeding point 11 is provided at a substantially middle position on the lower side b of the second element 4.

  The antenna pattern of the present invention is screen-printed with a conductive paste on the surface of the window glass 1 and baked to form a window glass with an antenna. After mounting such a window glass 1 on a side window of a vehicle or the like, The internal conducting wire 12 a of the coaxial cable 12 was connected to one feeding point 10, and the external conducting wire 12 b was connected to the second feeding point 11.

As a result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above so that the transmission / reception gain in the mobile phone band of 800 MHz band becomes high, it is as good as in the first embodiment. It was found that the transmission / reception performance was obtained and that it was sufficiently practical.
[Example 3]
The third embodiment is also a modification of the pattern of the first embodiment. The length of the first element 3 is set to a length corresponding to a quarter wavelength of the transmitted / received radio wave, and the length of the entire circumference of the second element 4 is This pattern has a length corresponding to one wavelength, and is used as an antenna for a mobile phone having a frequency band of 2 GHz by making the shape of the second element 4 an irregular quadrangle as shown in FIG. Was printed and baked on the glass inner surface of the vehicle, or a sticker or sheet printed on the interior of the window glass 1 or an insulating member such as a resin body.

  The second element 4 has a quadrangular shape with four corners at the upper and lower ends and the left and right ends, and has a symmetrical shape.

  If the wavelength shortening rate of the glass plate at a frequency of 2100 MHz is about 0.5, the length of the first element 3 is ¼ wavelength of the transmitted / received radio wave, that is, 18 mm, and the total length of the entire circumference of the second element 4 Is the length of one wavelength, here 1900 MHz or 80 mm, the left and right hypotenuses a and d are 24 mm, the left and right hypotenuses b and c are 16 mm, and the total circumference is 80 mm. It was made into the square shape of the unusual shape.

  The second feeding point 11 is provided at the intersection of the lower oblique sides b and c of the second element 4.

  After such a window glass 1 was mounted on a side window of a vehicle or the like, the internal conductor 12a of the coaxial cable 12 was connected to the first feeding point 10, and the external conductor 12b was connected to the second feeding point 11.

As a result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above so as to increase the transmission / reception gain in a cellular phone of 2 GHz band, the same transmission / reception as in the first embodiment is achieved. It was found that the performance was obtained and it was sufficiently practical.
[Example 4]
As shown in FIG. 5, the fourth embodiment is an antenna used for the television broadcast wave UHF band, and a first feeding point 10 and a second feeding point 11 are provided in the vicinity of the first feeding point 10. The first element 3 is extended from the feeding point 10 in the vertical direction, and the length thereof is set to a length corresponding to a quarter wavelength of the transmission / reception radio wave. The first element 3 from the second feeding point 11 The second element 4 provided so as to surround is formed into a circular shape having a length corresponding to 3/2 wavelengths.

  This pattern was printed directly on the inner surface of the glass surface and baked, or a printed pattern on a seal or sheet was attached to the interior side of the window glass or the surface of an insulating member such as a resin body.

  Assuming that the wavelength reduction rate of the glass plate at a frequency of 600 MHz is about 0.6, the length of the first element 3 is ¼ wavelength of transmission / reception radio waves, that is, 75 mm, and the total length of the entire circumference of the second element 4. Is a circle with a length of 3/2 wavelengths, here 500 MHz or 540 mm.

  After such a window glass 1 was mounted on a side window of a vehicle or the like, the internal conductor 12a of the coaxial cable 12 was connected to the first feeding point 10, and the external conductor 12b was connected to the second feeding point 11.

  The antenna 2 in which the first element 3 and the second element 4 are arranged as described above was tuned so that the reception gain in a television UHF broadcast wave in the 470 to 770 MHz band was high.

  When the antenna of FIG. 5 arranged as described above is shown in terms of a dipole antenna ratio, as shown in the frequency characteristic diagram of FIG. 9, the average of the UHF band is −10.9 dB, which is a glass that has been put to practical use in the past. Good results were obtained that greatly exceeded the antenna gain of -20.0 dB, which is the average of the antennas.

  FIG. 10 shows a change in reception gain when the total length of the second element 4 is changed. According to this figure, the total length of the second element 4 is represented by one wavelength of the transmitted / received radio wave. From the above, it can be seen that the reception characteristics are good.

FIG. 11 shows a change in gain depending on the distance between the first element 3 and the second element 4, and it is good if the distance is spaced apart by at least 1/32 wavelength of the transmitted / received radio wave. It can be seen that excellent reception characteristics can be obtained.
[Example 5]
As shown in FIG. 6, the fifth embodiment is an antenna used in the television broadcast wave VHF-high band, and a second feeding point 11 is provided in the vicinity of the first feeding point 10 and the left side thereof. The first element 3 is horizontally extended from the first feeding point 10 in the right direction, and the length thereof is set to a length corresponding to a quarter wavelength of transmission / reception radio waves. The second element 4 provided so as to surround one element 3 has a rectangular shape with a length corresponding to one wavelength of the entire circumference.

  Assuming that the wavelength reduction rate of the glass plate at a frequency of 210 MHz is about 0.7, the length of the first element 3 is a quarter wavelength of transmission / reception radio waves, that is, a length of 250 mm. It was set as a horizontal line.

  For the second element 4, the total length of the entire circumference is the length of one wavelength of the transmitted / received radio wave. If the wavelength reduction rate of the glass plate at a frequency of 200 MHz is about 0.7, the total circumference is 1040 mm. Thus, the length of the vertical sides a and c was 100 mm, and the length of the horizontal sides b and d was 420 mm.

  The second feeding point 11 is provided at a substantially middle position of the vertical side a of the second element 4.

  The antenna pattern of the present invention is screen-printed with a conductive paste on the surface of the window glass and baked to form a window glass with an antenna. After the window glass 1 is mounted on a side window of a vehicle or the like, the first The internal conducting wire 12a of the coaxial cable 12 was connected to the feeding point 10 and the external conducting wire 12b was connected to the second feeding point 11.

A result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above as an antenna for a TV broadcast wave VHF-high band in a 170 to 222 MHz band so that a reception gain is increased. As with Example 1, it was found that good transmission / reception performance was obtained and that it could be sufficiently put into practical use.
[Example 6]
As shown in FIG. 7, the sixth embodiment is an antenna used for the FM radio broadcast wave band or the television broadcast wave VHF-Low band, and is close to the first feeding point 10 and its left side. The horizontal feed line e ₁ is extended rightward from the first feed point 10, the vertical stripe e ₂ is provided from the tip, and the horizontal stripe e ₃ is provided from the tip to form a crank shape. The first element 3 is provided, and the length thereof is set to a length corresponding to a quarter wavelength of transmission / reception radio waves.

  Further, the second element 4 is provided so as to surround the crank-shaped filament of the first element 3 from the second feeding point 11, and the length of the entire circumference is approximately L corresponding to one wavelength. The shape was a letter.

  The antenna of the present invention is used as an antenna having a frequency band of FM radio broadcast wave or television broadcast wave VHF-Low band, and this pattern is printed on a glass inner surface of a car or printed on a sticker or sheet. This was pasted on the inside of the window glass or an insulating member such as a resin body.

  Each dimension was as follows in consideration of the above conditions and the shortening rate of the glass plate.

Total length of the first element 3 = 525 mm,
Horizontal filament e ₁ = 65 mm, vertical filament e ₂ = 250 mm, horizontal filament e ₃ = 210 mm
The total length of the second element 4 = 2,100 mm,
Vertical filament a ₁ = 325 mm, vertical filament a ₂ = 75 mm,
Horizontal filament b ₁ = 150 mm, horizontal filament b ₂ = 500 mm,
Vertical filament c ₁ = 250 mm, vertical filament c ₂ = 150 mm,
Horizontal filament d = 650mm
The second feeding point 11 is provided at a position 75 mm from the lower end of the left vertical side a of the second element 4, and the first feeding point 10 is provided close to the right side of the second feeding point. It is a thing. The vertical line e ₂ is provided in parallel between the vertical line a ₁ and the vertical line c ₁ , and the horizontal line e ₃ is provided in parallel with a distance of 75 mm between the horizontal line b ₂ and the horizontal line d. Is.

  The antenna pattern of the present invention is screen-printed with a conductive paste on the surface of the window glass and baked to form a window glass with an antenna. After the window glass 1 is mounted on a side window of a vehicle or the like, the first The internal conducting wire 12a of the coaxial cable 12 was connected to the feeding point 10 and the external conducting wire 12b was connected to the second feeding point 11.

As a result of tuning the antenna 2 of the sixth embodiment so as to increase the reception gain as an antenna used in the FM radio broadcast wave band or the television broadcast wave VHF-Low band, a suitable reception performance is obtained as in the other embodiments. It was found that it was sufficiently practical.
[Example 7]
The seventh embodiment is a modification of the pattern of the first embodiment.

  The main difference from the first embodiment shown in FIG. 2 is that the shape of the first element 3 is substantially L-shaped as shown in FIG. 12, and transmission / reception radio waves are transmitted from the feeding point 10 side of the first element 3. A linear portion (first linear portion 3a) corresponding to a length of 1/8 wavelength or less is capacitively coupled to the second element 4, and the entire circumference of the second element 4 is set to the transmission / reception frequency. This is a point corresponding to 3/2 times the wavelength.

  The first element 3 is capacitively coupled by bringing the first line portion 3a extending in the horizontal direction from the first feeding point 10 close to the horizontal line on the upper side of the second element 4 of the rectangular closed loop line. Then, the second line 3b is extended below the tip of the first line 3a so that the second line 3b is separated from the upper side of the second element 4.

  Further, the length of the first element 3 is set to a quarter wavelength of the transmitted / received radio wave, the length of the first wire portion 3a is set to a length of 1/8 wavelength or less of the transmitted / received radio wave, and the first element The antenna element of the present invention was disposed on the inner surface of the glass surface with the entire circumference of the second element 4 provided so as to surround 3 being 3/2 wavelengths.

  That is, the length of the first element 3 is ¼ wavelength of the transmission / reception radio wave from the first feeding point 10 with respect to the mobile phone band having the frequency of 800 MHz, that is, the glass plate at the frequency of the 800 MHz band. When the wavelength shortening rate is about 0.6, the length is 55 mm, the length of the first linear portion 3 a is 15 mm, and the length of the second linear portion 3 b extending in the vertical direction from the tip thereof is as follows. 40 mm.

  In addition, the second element 4 has a length corresponding to 3/2 times the wavelength of the transmission / reception frequency, but a frequency of 850 MHz different from that of the first element 3 in order to increase the gain over a wide band as in the first embodiment. If the wavelength shortening rate of the glass plate at a frequency of 850 MHz is about 0.6, the total circumference is 320 mm, and the length of the vertical sides a and c Is 60 mm, the lengths of the horizontal sides b and d are 100 mm, and the antenna area can be made smaller than that of the first embodiment shown in FIG.

  The second feeding point 11 was provided on the upper side of the second element 4, and the first feeding point 10 was provided in the vicinity of the lower part of the second feeding point.

  The antenna pattern of the present invention is screen-printed with a conductive paste on the surface of the window glass 1 and baked to form a window glass with an antenna. After mounting such a window glass 1 on a side window of a vehicle or the like, The internal conducting wire 12 a of the coaxial cable 12 was connected to one feeding point 10, and the external conducting wire 12 b was connected to the second feeding point 11.

As a result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above so that the transmission / reception gain in the mobile phone band of 800 MHz band becomes high, it is as good as in the first embodiment. It was found that the transmission / reception performance was obtained and that it was sufficiently practical.
[Example 8]
As shown in FIG. 13, Example 8 is a modification of the pattern of Example 4, but is a pattern suitable for reception of radio waves in the TV broadcast wave VHF-HIGH band. The main difference from the fourth embodiment is that the shape of the first element 3 is substantially L-shaped or substantially L-shaped as shown in FIG. 5, and transmission / reception radio waves are transmitted from the feeding point 10 side of the first element 3. This is a point in which a linear portion (first linear portion 3 a) corresponding to a length of 1/8 wavelength or less is capacitively coupled to the inside of the circular second element 4.

  That is, the first element 3 is capacitively coupled to the second element from the first feeding point 10 provided in the vicinity of the second feeding point 11 inside the second element 4 of the closed loop line. The provided arc-shaped first filament 3a and the second filament 3b extending from the tip of the first filament 3a toward the center of the circular second element 4, and the second line The strip portion 3 b was separated from the second element 4.

  In other words, the length of the first element 3 in the eighth embodiment is about 1/4 wavelength of the transmission / reception radio wave when the wavelength reduction rate of the glass plate at the frequency of 210 MHz is about 0.7. In other words, the length of the first linear portion 3a is 90 mm as a length of 1/8 wavelength or less of the transmitted / received radio wave, and extends from the tip toward the center of the second element 4. The length of the two filament parts 3b was 160 mm.

  For the second element 4, the total length of the entire circumference is the length of one wavelength of the transmitted / received radio wave. If the wavelength reduction rate of the glass plate at a frequency of 200 MHz is about 0.7, the total circumference is 1040 mm. Thus, a circular shape having a diameter of about 330 mm was formed.

  The antenna pattern of the present invention is screen-printed with a conductive paste on the surface of the window glass 1 and baked to form a window glass with an antenna. After mounting such a window glass 1 on a side window of a vehicle or the like, The internal conducting wire 12 a of the coaxial cable 12 was connected to one feeding point 10, and the external conducting wire 12 b was connected to the second feeding point 11.

As a result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above as a TV broadcast wave VHF-high band antenna so as to increase the reception gain, Similarly, it was found that good transmission / reception performance was obtained and that it could be sufficiently put into practical use.
[Example 9]
As shown in FIG. 14, the ninth embodiment is a modification of the pattern of the third embodiment. The second feeding point of the second element 4 of the substantially loop-shaped closed loop filament is set to a quarter wavelength of the transmitted / received radio wave. A leader line 4a having the following length is provided so as to be close to the inside of the closed loop line along the closed loop line, and the feeding point 11 is a position near the feeding point 10 and the lower hypotenuse b of the second element 4; It is provided at the intersection point of c.

  The length of the first element 3 is set to a length corresponding to a quarter wavelength of the transmitted / received radio wave, the length of the closed loop portion of the entire circumference of the second element 4 is set to a length corresponding to two wavelengths, and the closed loop filament Is used as an antenna for a cellular phone having a frequency band of 2 GHz, with the length of the lead line connecting the first and second feeding points 11 being equal to or shorter than a quarter wavelength of the transmitted / received radio wave. What was printed on the inner surface of the car or printed on a sticker or sheet was attached to the interior side of the window glass 1 or the surface of an insulating member such as a resin body.

  If the wavelength shortening rate of the glass plate at a frequency of 2100 MHz is about 0.5, the length of the first element 3 is ¼ wavelength of the transmitted / received radio wave, that is, 18 mm, and the total length of the entire circumference of the second element 4 Is the length of two wavelengths, here 1900 MHz or 160 mm, the left and right hypotenuses a and d are 48 mm, the left and right hypotenuses b and c are 32 mm, and the total circumference is 160 mm. It was made into the irregular-shaped square shape.

  After such a window glass 1 was mounted on a side window of a vehicle or the like, the internal conductor 12a of the coaxial cable 12 was connected to the first feeding point 10, and the external conductor 12b was connected to the second feeding point 11.

As a result of tuning the antenna 2 in which the first element 3 and the second element 4 are arranged as described above so as to increase the transmission / reception gain in a cellular phone of 2 GHz band, the transmission / reception is as good as in the third embodiment. It was found that the performance was obtained and it was sufficiently practical.
[Example 10]
The tenth embodiment is a modification of the pattern of the seventh embodiment. As shown in FIG. 15, the lead wire 4a having a length equal to or shorter than a quarter wavelength of the transmitted / received radio wave at the second feeding point of the second element 4 is used. Are provided so as to be close to each other along the closed-loop line inside the closed-loop line.

  The length of the first element 3 is a length corresponding to a quarter wavelength of the transmitted / received radio wave, the length of the closed loop portion of the entire circumference of the second element 4 is a length corresponding to one wavelength, and the closed loop As the antenna for the TV broadcast wave UHF band having a frequency band of 470 to 770 MHz, the length of the lead line connecting the line and the second feeding point 11 is set to a length equal to or less than ¼ wavelength of the transmission / reception radio wave. The pattern was printed and baked on the inner surface of the vehicle on the glass surface, or printed on a seal or sheet, and attached to the indoor side of the window glass 1 or an insulating member such as a resin body.

  Assuming that the wavelength reduction rate of the glass plate at a frequency of 600 MHz is about 0.6, the length of the first element 3 is ¼ wavelength of the transmitted / received radio wave, that is, 75 mm, and the total length of the entire circumference of the second element 4 Is 360 mm with a length of one wavelength, that is, a frequency of 500 MHz.

  After such a window glass 1 was mounted on a side window of a vehicle or the like, the internal conductor 12a of the coaxial cable 12 was connected to the first feeding point 10, and the external conductor 12b was connected to the second feeding point 11.

  The antenna 2 in which the first element 3 and the second element 4 are arranged as described above was tuned so that the reception gain in the TV broadcast wave UHF band of 470 to 770 MHz band becomes high.

  When the antenna of FIG. 15 arranged in this way is represented by a dipole antenna ratio, the average of the UHF band is −10.3 dB as shown in the frequency characteristic diagram of FIG. Good results were obtained that greatly exceeded the antenna gain of -20.0 dB, which is the average of the antennas.

  FIG. 18 shows a change in reception gain due to a change in the total length of the second element 4. According to this figure, when the total length of the second element 4 is set to one or more wavelengths of transmission / reception radio waves. It can be seen that the reception characteristics are good.

FIG. 19 shows a change in reception gain depending on the length of the filament (first filament 3a) in the vicinity of the second element 4 of the first element 3, and the first filament It can be seen that good reception characteristics can be obtained if the length of 3a is 1/8 wavelength or less of the transmitted / received radio wave.
[Example 11]
As shown in FIG. 16, Example 11 is a modification of the pattern of Example 7.

  The difference between Example 11 and Example 7 is that the first feeding point 10 and the second feeding point 11 are not close to each other, but instead, as shown in FIG. A point where the metal terminal portion of the metal terminal 21 placed and fixed on the feeding point 11 is placed close to the first feeding point 10 and the two feeding points are arranged substantially close to each other, or a rectangular shape. This is that a horizontal auxiliary filament is provided from the upper left corner of the second element 4 and that the lower filament of the second element 4 has two filaments. Is almost the same.

  That is, the first element 3 has a length corresponding to a quarter wavelength of transmitted / received radio waves, the entire circumference of the second element 4 has a length corresponding to one wavelength, and TV broadcasting in a 470 to 770 MHz band. This pattern is used as an antenna in the wave UHF band, and this pattern is printed and baked on the inner surface of a glass surface or printed on a seal or sheet, and is attached to an insulating member such as the indoor side of the window glass 1 or a resin body.

  After such a window glass 1 was mounted on a side window of a vehicle or the like, the internal conductor 12a of the coaxial cable 12 was connected to the first feeding point 10, and the external conductor 12b was connected to the second feeding point 11.

As a result of tuning the antenna 2 arranged in this way as an antenna in the TV broadcast wave UHF band so as to increase the transmission / reception gain, good transmission / reception performance can be obtained as in the seventh embodiment, which can be sufficiently put into practical use. I understood it.
[Example 12]
As shown in FIG. 20, in Example 12, feed points are provided one by one in the vicinity of the left and right corners inside the upper part of the second element 4 which is a substantially quadrangular closed loop line element. The first elements 3, 3 ′ are arranged from the two first feeding points 10, 10 ′, and the patterns of the two first elements 3, 3 ′ are symmetrical.

  Further, two second feeding points 11 and 11 ′ are provided on the closed loop line of the second element 4, and the two feeding points 11 and 11 ′ are respectively connected to the first feeding points 10 and 10. The second element 4 is connected and disposed on a closed loop line or a lead line at a position in the vicinity of '.

  In this embodiment, the first element 3 on one side and the second element 4 in the form of a closed loop viewed from the second feeding point 11 are used as an antenna for a TV broadcast wave UHF band having a frequency band of 470 to 770 MHz, Using the other first element 3 ′ and the second element 4 in a closed loop viewed from the second feeding point 11 ′ as an antenna for a TV broadcast wave UHF band having a frequency band of 470 to 770 MHz, Two antennas were used.

  The length of each of the first elements 3 and 3 ′ is set to a length corresponding to a quarter wavelength of the transmitted / received radio wave, and the length of the closed loop portion of the second element 4 is set to a length corresponding to 3/2 wavelengths. .

  Such a pattern was printed on the inner surface of the glass surface and then baked, or the pattern was printed on a sticker or sheet, and then adhered to the interior of the window glass 1 or an insulating member such as a resin body.

  Assuming that the wavelength reduction rate of the glass plate at a frequency of 600 MHz is about 0.6, the lengths of the two first elements 3 and 3 ′ are each ¼ wavelength of transmission / reception radio waves, that is, 75 mm. The total length of the entire circumference is 3/2 wavelengths, that is, 540 mm with a frequency of 500 MHz.

  After such a window glass 1 is mounted on a side window of a vehicle or the like, the inner conductor 12a and the outer conductor 12b of the coaxial cable 12 are connected to the first feeding point 10 and the second feeding point 11, respectively, of the one side, Further, the inner conductor 12a and the outer conductor 12b of the coaxial cable 12 were connected to the other first feeding point 10 ′ and second feeding point 11 ′, respectively.

  The antenna 2 in which the first elements 3, 3 'and the second element 4 are arranged as described above was tuned so that the reception gain in the TV broadcast wave UHF band of 470 to 770 MHz band was increased.

  When the two antennas of FIG. 20 arranged in this way are represented by a dipole antenna ratio, as shown by the thick and thin lines in the frequency characteristic diagram of FIG. 22, the average of the UHF band is −9.6 dB, −9, respectively. .8 dB, a good result was obtained that greatly exceeded the reception gain of -20.0 dB, which is the average of glass antennas that have been put to practical use in the past, and it was further improved by diversity reception of these two antennas. Reception performance can be obtained.

Compared with the case where two closed-loop antennas are provided in different areas by providing two first elements 3 and 3 'in the second element 4 in the closed-loop shape. Thus, the area occupied by the second element 4 can be halved.
[Example 13]
Example 13 shown in FIG. 21 is a modification of Example 12 described above, in which the first elements 3 are arranged in two locations within the element of a substantially quadrangular closed loop line. The first feeding points 11 and 11 ′ of the closed loop filament 4 are arranged at two positions in the vicinity of the first feeding points 10 and 10 ′ that are feeding points of the first elements 3 and 3 ′. Provided.

  One of the two first elements is an antenna for a mobile phone in the 800 MHz band, and the other first element 3 ′ is a two-line antenna that is an antenna for a mobile phone in the 2 GHz band.

  Further, each of the two feeding points 11 and 11 ′ is connected via a lead wire from a closed loop wire which is the second element 4, and the closed loop wire of the second element 4 is shared. is there.

  Each of the first elements 3 and 3 ′ has a length corresponding to a quarter wavelength of the transmission / reception radio wave, and the length of the closed loop portion of the second element 4 is 3/2 wavelengths with respect to the 800 MHz band. The length was equivalent to 4 wavelengths for the 2 GHz band.

  Such a pattern was printed on the inner surface of the glass surface and then baked, or the pattern was printed on a sticker or sheet, and then adhered to the interior of the window glass 1 or an insulating member such as a resin body.

  When the two antennas have a wavelength reduction rate of the glass plate in the 800 MHz band of about 0.6 and a wavelength reduction rate of the glass plate in the frequency of the 2 GHz band of about 0.5, respectively, the two first elements 3, 3 ′ Is a quarter wavelength of transmission / reception radio waves, that is, 55 mm and 18 mm, respectively, and the total length of the entire circumference of the second element 4 is 3/2 wavelength for the 800 MHz band, 4 wavelengths for the 2 GHz band, That is, it was set to 320 mm.

  After such a window glass 1 is mounted on a side window of a vehicle or the like, the inner conductor 12a and the outer conductor 12b of the coaxial cable 12 are connected to the first feeding point 10 and the second feeding point 11, respectively, of the one side, Further, the inner conductor 12a and the outer conductor 12b of the coaxial cable 12 were connected to the other first feeding point 10 ′ and second feeding point 11 ′, respectively.

  As a result of arranging the first element 3, 3 ′ and the second element 4 as described above and performing tuning so that the reception gain in the mobile phone band of 800 MHz and 2 GHz band is increased, good transmission / reception performance is obtained. It was found that the product can be sufficiently put to practical use.

  As mentioned above, although demonstrated by the preferable Example, this invention is not limited to these, A various application is possible.

  In addition, the line width of the first element 3 and the second element 4 is 20 mm or less, and preferably selected within the range of 0.1 to 10 mm, thereby improving the gain with respect to radio waves in a wide range of frequencies. Therefore, a wideband antenna can be obtained.

  In addition, it can also be suitably used for transmission / reception of radio waves having a frequency higher than the ultra-short wave band, such as personal radio, commercial radio, and PHS.

  In addition, the antenna of the present invention directly prints the antenna pattern on the window glass surface of the upper margin part, lower margin part, front window glass, side window glass, roof window glass of the heating filament of the rear window glass, Or it prints on a thin seal | sticker or a sheet | seat, and affixes it on the inner surface side of a window glass surface, or it affixes and uses it on the insulating member of the body of a vehicle body.

  The antenna of the present invention can be used alone, but it can be used in combination with a glass antenna, a seal antenna printed on a sticker or sheet and attached to an insulating member of a vehicle body, or a pole antenna. If reception is performed, a more preferable result can be obtained.

  In the embodiment of the antenna of the present invention, the feeding terminal of the antenna 2 and a tuner (not shown) are connected by a coaxial cable. However, an impedance matching circuit or an amplifier (not shown) is connected between the feeding terminal of the antenna 2 and the tuner. If a circuit is connected, a more preferable result can be obtained.

The front view which provided the glass antenna of this invention in the side window glass for motor vehicles. The principal part detailed front view which shows the antenna part of Example 1 of this invention. The principal part detailed front view which shows the antenna part of Example 2 of this invention. The principal part detailed front view which shows the antenna part of Example 3 of this invention. The principal part detailed front view which shows the antenna part of Example 4 of this invention. The principal part detailed front view which shows the antenna part of Example 5 of this invention. The principal part detail front view which shows the antenna part of Example 6 of this invention. The frequency characteristic figure of the antenna gain in the 800-MHz band of Example 1 of this invention. The frequency characteristic figure of the antenna gain in the TV broadcast wave UHF band of Example 4 of this invention. The receiving characteristic figure by the change of the total length of the 2nd element 4 of the glass antenna in the TV broadcast wave UHF band of Example 4 of this invention. The receiving characteristic figure by the space | interval change between the 1st element of the glass antenna in the TV broadcast wave UHF band of Example 4 of this invention, and a 2nd element. The principal part detailed front view which shows the antenna part of Example 7 of this invention. The principal part detailed front view which shows the antenna part of Example 8 of this invention. The principal part detailed front view which shows the antenna part of Example 9 of this invention. The principal part detail front view which shows the antenna part of Example 10 of this invention. The principal part detail front view which shows the antenna part of Example 11 of this invention. The frequency characteristic figure of the antenna gain in the TV broadcast wave UHF band of Example 10 of this invention. The receiving characteristic figure which shows the change of the receiving gain by the change of the total length of the 2nd element 4 of the glass antenna in the TV broadcast wave UHF band of Example 10 of this invention. The receiving characteristic figure by the change of the length of the 1st filament part of the 1st element of the glass antenna in the TV broadcast wave UHF band of Example 10 of this invention. The principal part detail front view which shows the antenna part of Example 12 of this invention. The principal part detailed front view which shows the antenna part of Example 13 of this invention. The frequency characteristic figure of the antenna gain in the TV broadcast wave UHF band of Example 12 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Window glass 2 Antenna of this invention 3, 3 '1st element 3a, 3a' 1st filament part 3b, 3b '2nd filament part 4, 4' 2nd element 4a Lead wire 4b Closed loop filament part 10, 10 'first feeding point 11, 11' second feeding point 12 coaxial cable 12a inner conductor 12b outer conductor 20 metal flange 21 metal terminal

Claims (10)

A linear antenna disposed on a window glass surface of a moving body such as an automobile or a surface of an insulating member of a body, and having a length of 1/4 wavelength or 3/4 wavelength of a transmission / reception radio wave extending from a first feeding point 1 element and a second feed point in the vicinity of the first feed point, and have a length of one or more wavelengths of transmission / reception radio waves extending from the second feed point so as to surround the first element A vehicular antenna comprising a second element in a closed loop shape. A first linear portion in which a linear portion extending from the first feeding point of the first element is close to the closed loop linear portion of the second element with a length of 1/8 wavelength or less of transmission / reception radio waves and capacitively coupled. The vehicular antenna according to claim 1, further comprising a second linear portion extending in a direction away from the second element from the tip thereof. A portion of the first element that is a quarter wavelength away from the first feeding point along the line portion that extends from the second feeding point of the second element is the end opposite to the first feeding point of the first element. The vehicular antenna according to claim 1, wherein the vehicular antenna is spaced apart by 1/32 wavelength or more. 4. A feeding point of the second element in the closed loop shape is provided at a leading end of a lead line along the closed loop, and the length of the lead line is set to a quarter wavelength or less of transmission / reception radio waves. The vehicle antenna according to any one of the above. Instead of bringing the first feeding point and the second feeding point close to each other, a metal terminal is placed on at least one feeding point of the first feeding point and the second feeding point, 5. The vehicle antenna according to claim 1, wherein any one of the metal terminals is disposed so as to be close to the feeding point on the other side or the metal terminal. The first wire portion having a length of 1/8 wavelength or less of transmission / reception radio waves from the first feeding point of the first element is close to the second element with an interval of 0.1 to 10 mm. The vehicle antenna according to any one of claims 2 to 5. The vehicular antenna according to any one of claims 1 to 6, wherein the length of the closed-loop line portion of the second element is set to 1 wavelength or more and 4 wavelengths or less of transmission / reception radio waves. The length of the closed-loop line portion of the second element is (1 + n / 2) λ (where n is an integer from 0 to 6), where λ is the wavelength of the transmitted / received radio wave. 8. The vehicle antenna according to 7. 9. The antenna pattern according to any one of claims 1 to 8, wherein the antenna pattern is directly printed on a surface made of a window glass of a moving body such as an automobile or a body insulating member, or a seal or sheet on which the pattern is printed is attached. The vehicle antenna described. A plurality of first elements are disposed inside the closed-loop second element, and each first feeding point of the plurality of first elements is a second feeding of the closed-loop second element. The vehicular antenna according to claim 1, wherein the vehicular antenna is provided so as to be in the vicinity of the point.