JP2007104257A - Dielectric antenna and element therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dielectric antenna which has a first antenna electrode and a second antenna electrode arranged in one dielectric block, and operates in two frequency bands. <P>SOLUTION: In the dielectric block 30 whose front surface and rear face are parallel, a slot 32 parallel to the front surface is formed from a side face, and the dielectric block is arranged on a ground electrode 46. The first antenna electrode 36 is provided on the front surface of the dielectric block 30, and the second antenna electrode 38 made up of a conductive metal board is inserted into the slot 32. A first hole 42 piercing vertically is formed, and a first feeding pin 44 is inserted into this hole in such a way as to electrically connect its upper end to the first electrode 36, and not to electrically connect it to the second electrode 38 and the ground electrode 46. A second hole 48 piercing vertically is formed, a second feeding pin 40 is inserted into this hole in such a way as to electrically connect its upper end to the second electrode 38, and not to electrically connect it to the ground electrode 46. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dielectric antenna that operates as an antenna of a mobile communication radio device or the like and is used in two frequency bands, and a dielectric antenna element that is used to configure such an antenna.

An example of a conventional dielectric antenna that operates in two frequency bands as an antenna for two mobile communication radios is disclosed in Japanese Patent Laid-Open No. 2001-60823. This prior art will be briefly described with reference to FIG. FIG. 15 is an exploded perspective view of an example of a conventional dielectric antenna that operates in two frequency bands. In FIG. 15, the first antenna electrode 12 is disposed on the surface of the first dielectric block 10 with a conductive thin film, and the second antenna electrode 16 is disposed on the surface of the second dielectric block 14 with a conductive thin film. Is done. The second dielectric block 14 is first disposed on the ground electrode 18, and the first dielectric block 10 is placed on the second dielectric block 14 via the double-sided tape 28. The double-sided tape 28 is attached in a laminated form. Further, the first power supply pin is inserted into the first hole 20 formed in the first dielectric block 10, the second dielectric block 14, the second antenna electrode 16 and the ground electrode 18 so as to penetrate vertically. 22 is inserted, and the upper end portion thereof is electrically connected to the first antenna electrode 12 by soldering or the like. The first power supply pin 22 is set so as not to be electrically connected to the second antenna electrode 16 and the ground electrode 18. In addition, the second power supply pin 26 is inserted into the second dielectric block 14 and the ground electrode 18 through a second hole 24 that penetrates in the vertical direction, and the upper end portion of the second power supply pin 26 is inserted into the second antenna electrode 16. Are electrically connected to each other by soldering or the like. The second power supply pin 26 is set so as not to be electrically connected to the ground electrode 18. In the above structure, the second feed pin 26 is inserted through the second hole 24 formed in the second dielectric block 14 and electrically connected to the second antenna electrode 16, and the second feed electrode 26 is electrically connected to the second antenna electrode 16. Of course, one dielectric block 10 is arranged in a laminated form.
JP 2001-60823 A

  In such a configuration, the first dielectric block 10, the first antenna electrode 12, the ground electrode 18, and the first feed pin 22 constitute a first antenna, and the second dielectric block 14 and the second antenna. The electrode 16, the ground electrode 18, and the second feed pin 26 constitute a second antenna. For example, the first antenna is set to operate in the ETC 5.8 GHz frequency band, and the second antenna is set to operate in the VICS 2.5 GHz frequency band, for example. Or, for example, the first antenna is set to operate in the frequency band of VICS 2.5 GHz, and the second antenna is set to operate in the frequency band of GPS 1.5 GHz, for example. Also good.

  In the dielectric antenna operating in the two frequency bands according to the above-described conventional technology, the two antennas are integrated in a stacked manner in the upper and lower sides, and compared with the case where the two antennas are separately provided. Thus, an excellent effect that the installation space is small is sufficient.

  The above-described conventional dielectric antenna requires the first dielectric block 10 and the second dielectric block 14 which is separate from the first dielectric block 10, and cannot be manufactured at low cost. In addition, when the first dielectric block 10 is placed on the second dielectric block 14 and disposed in a stacked manner, the first dielectric block 14 is arranged with respect to the second dielectric block 14 as shown in FIG. There is a possibility that the dielectric block 10 may be displaced with the first power supply pin 22 as the rotation axis. FIG. 16 is a plan view of a conventional dielectric antenna in which the first and second dielectric blocks are displaced from each other. If the first antenna transmits and receives a circularly polarized signal, there is no major problem even if this positional shift occurs. However, if the first antenna transmits and receives a linearly polarized signal, the first antenna There arises a problem that the antenna gain is reduced due to the directivity shift. Therefore, when the first dielectric block 10 is disposed on the second dielectric block 14, a careful work is required, and the work is complicated accordingly.

  The present invention has been made in view of the circumstances of the above-described conventional dielectric antenna. The first antenna electrode and the second antenna electrode are disposed in one dielectric block, and the operation is performed in two frequency bands. An object of the present invention is to provide a dielectric antenna and a dielectric antenna element.

  In order to achieve such an object, the dielectric antenna of the present invention has a dielectric block whose front and back surfaces are parallel to each other, and a slot parallel to the front surface is provided from the side surface, and the dielectric block is disposed on the ground electrode. A first antenna electrode is provided on the surface of the dielectric block, a second antenna electrode is provided in the slot of the dielectric block, and the dielectric block, the second antenna electrode, and the ground electrode are provided. A first hole penetrating vertically is formed, a first power feed pin is inserted into the first hole, an upper end portion thereof is electrically connected to the first antenna electrode, and the first power feed A second pin penetrating up and down from the slot of the dielectric block to the back surface and to the ground electrode so that the pin is not electrically connected to the second antenna electrode and the ground electrode; A hole is formed, a second power feed pin is inserted into the second hole, and its upper end is electrically connected to the second antenna electrode, and the second power feed pin is electrically connected to the ground electrode. It is configured not to connect automatically.

  In addition, a slot parallel to the front surface from a side surface is provided in a dielectric block whose front and back surfaces are parallel, a first antenna electrode is provided on the front surface of the dielectric block, and a first antenna electrode is provided in the slot of the dielectric block. Two antenna electrodes, a ground electrode on the back surface of the dielectric block, a first hole penetrating the dielectric block, the second antenna electrode, and the ground electrode vertically. A first feed pin is inserted into the first hole and the upper end thereof is electrically connected to the first antenna electrode, and the first feed pin is electrically connected to the second antenna electrode and the ground electrode. A second hole penetrating vertically from the slot of the dielectric block to the back surface and to the ground electrode is formed, and a second power supply pin is formed in the second hole. Insertion and electrically connecting the upper portion to the second antenna electrode, yet the second feed pin may be configured not to electrically connect to the ground electrode.

  A conductive thin film is disposed on the surface of the dielectric block to form the first antenna electrode, and a conductive metal plate is inserted into the slot from the opening on the side surface to form the second antenna electrode. You can also

  Furthermore, a long ridge in the insertion direction of the conductive metal plate is provided on the top and bottom surfaces of the slot, respectively, and the tip of the ridge contacts the flat conductive metal plate so that the slot in the slot It is also possible to configure so as to regulate the vertical position of the conductive metal plate.

  Further, the cross section perpendicular to the insertion direction of the conductive metal plate is bent in a zigzag shape or a wavy shape, and the upper and lower end portions of the zigzag shape or the wavy shape are in contact with the top and bottom surfaces of the slot, and the conductive metal in the slot It is also possible to configure so as to restrict the vertical position of the plate.

  Instead of cutting and raising the conductive metal plate as the second power supply pin, and forming a second hole penetrating vertically between the slot and the back surface of the dielectric block, A slit penetrating up and down from the opening on the side to the position facing the second hole is provided, and the conductive metal plate is cut and raised in the slit and the second hole formed in the ground electrode. It is also possible to configure by inserting the power supply pins.

  A conductive thin film is disposed on the surface of the dielectric block to form the first antenna electrode, and a conductive thin film is disposed on the top surface or the bottom surface of the slot to form the second antenna electrode. You can also

  Also, for the work of electrically connecting the second feed pin to the second antenna electrode in the vertical direction facing the second hole between the surface and the slot of the dielectric block It is also possible to form a third hole.

  In addition, a conductive thin film may be disposed on the back surface of the dielectric block to configure the ground electrode.

  In addition, a second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted to integrally form a dielectric block whose front and back surfaces are parallel, and the second antenna electrode is parallel to the front surface. In addition, the dielectric block is disposed on the ground electrode so as to be located halfway between the front surface and the back surface, and a first antenna electrode is provided on the front surface of the dielectric block. And a first hole penetrating vertically through the second antenna electrode and the ground electrode, a first feeding pin is inserted into the first hole, and an upper end portion of the first antenna electrode is formed in the first hole. And the first feed pin is not electrically connected to the second antenna electrode and the ground electrode, and the second feed pin protrudes from the back surface of the dielectric block. Said second feeding pin to the projected may be constructed by inserting so as not to electrically connected to a second hole formed in the ground electrode.

  Then, a second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted to integrally form a dielectric block whose front surface and back surface are parallel, and the second antenna electrode is parallel to the front surface. In addition, the first antenna electrode is provided on the front surface of the dielectric block, the ground electrode is provided on the rear surface of the dielectric block, and the dielectric block is disposed between the front surface and the rear surface. And a first hole penetrating vertically through the second antenna electrode and the ground electrode, a first feeding pin is inserted into the first hole, and an upper end portion of the first antenna electrode is formed in the first hole. And the first power feed pin is not electrically connected to the second antenna electrode and the ground electrode, and the second power feed pin is connected from the back surface of the dielectric block. Issued thereby, may constitute the second feed pin to the protruding inserted so as not to electrically connected to a second hole formed in the ground electrode.

  In the dielectric antenna element of the present invention, a dielectric block whose front surface and back surface are parallel is provided with a slot parallel to the front surface from a side surface, and a first antenna electrode is provided on the surface of the dielectric block, A second antenna electrode is provided in the slot of the dielectric block, a first hole penetrating the dielectric block and the second antenna electrode vertically is formed, and a first hole is formed in the first hole. And the upper end portion of the dielectric block is electrically connected to the first antenna electrode, and the first feeder pin is not electrically connected to the second antenna electrode. A second hole penetrating vertically from the slot to the back surface is formed, and a second feeding pin is inserted into the second hole, and an upper end thereof is electrically connected to the second antenna electrode. Configured.

  Then, a second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted to integrally form a dielectric block whose front surface and back surface are parallel, and the second antenna electrode is parallel to the front surface. In addition, the first antenna electrode is provided on the front surface of the dielectric block so as to be located halfway between the front surface and the rear surface, and a first antenna electrode penetrating the dielectric block and the second antenna electrode vertically. 1 hole is formed, a first power feed pin is inserted into the first hole, and an upper end thereof is electrically connected to the first antenna electrode, and the first power feed pin is connected to the second hole. The antenna electrode may not be electrically connected to the antenna block, and the second power feed pin may protrude from the back surface of the dielectric block.

  In the dielectric antenna according to claims 1 and 2, since there is one dielectric block and the number of parts is small, the dielectric antenna can be configured at low cost. In addition, as in the above-described prior art, the two dielectric blocks are not arranged in a laminated form, so that the work of arranging them in a laminated form is unnecessary, and the first antenna and the second antenna are shifted. It is not disposed and is suitable for mass production.

  In the dielectric antenna according to claim 3, since the conductive antenna plate is inserted into the slot provided in the dielectric block to form the second antenna electrode, the structure of the second antenna electrode is simple. .

  Further, in the dielectric antenna according to claim 4, a flat conductive metal is provided with long protrusions in the insertion direction on the top and bottom surfaces of the slot, respectively, and the tips of these protrusions are inserted into the slots. Since the plate is in contact with the plate, the vertical position of the conductive metal plate is restricted within the slot, the position of the second antenna electrode is constant, and the antenna characteristics of the second antenna are constant.

  In the dielectric antenna according to claim 5, since the cross section perpendicular to the insertion direction of the conductive metal plate inserted into the slot is bent in a zigzag shape or a wave shape, The upper and lower positions of the conductive metal plate are regulated in contact with the top and bottom surfaces of the slot, and the antenna characteristics of the second antenna become constant. In addition, if the conductive metal plate has elasticity, the conductive metal plate elastically contacts the top and bottom surfaces of the slot, and there is no play in the vertical direction within the slot.

  In the dielectric antenna according to claim 6, since the conductive metal plate is cut and raised to form the second power supply pin, the number of parts is reduced by that amount, and the second power supply pin is soldered to the conductive metal plate. This eliminates the need for electrical connection by attaching, and is suitable for mass production.

  In the dielectric antenna according to claim 7, since the conductive thin film is provided on the surface of the dielectric block and one of the top surface and the bottom surface of the slot to form the first and second antenna electrodes, The first and second antenna electrodes can be easily configured.

  Further, in the dielectric antenna according to claim 8, since the third hole is formed so as to face the second hole between the surface of the dielectric block and the slot, the solder is inserted into the third hole. An operation of electrically connecting the second antenna electrode and the second feeding pin by inserting a trowel or the like can be performed.

  In the dielectric antenna according to claim 9, since the conductive thin film is provided on the back surface of the dielectric block to form the ground electrode, the ground electrode can be easily configured.

  In the dielectric antenna according to claims 10 and 11, since the dielectric block is integrally formed by inserting the second antenna electrode made of a conductive metal plate, the second antenna electrode is incorporated into the dielectric block. Work is omitted and it is suitable for mass production.

  In the dielectric antenna element according to the twelfth and thirteenth aspects, the dielectric antenna can be easily configured by being disposed on the ground electrode. This dielectric antenna element has a single dielectric block and has a small number of parts, so that it can be constructed at low cost, and the first antenna and the second antenna are not shifted. .

  A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a first embodiment of a dielectric antenna according to the present invention. FIG. 2 is a view taken in the direction of arrow A in a state assembled with the structure of FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along the line CC in FIG. FIG. 5 is an antenna characteristic diagram of the first embodiment of the dielectric antenna of the present invention. FIG. 6 is a diagram showing a change in resonance frequency depending on the vertical position of the second antenna electrode in the slot.

  In the first embodiment of the dielectric antenna according to the present invention, one dielectric block 30 is a substantially rectangular parallelepiped whose front surface and back surface are parallel, and is provided with a slot 32 parallel to the surface from its side surface. In addition, on the top surface and the bottom surface of the slot 32, a plurality of long protrusions 32a, 32a, 32a,... Are molded integrally. These protrusions 32a, 32a, 32a... Have, for example, a triangular or semicircular cross section, and the height of the protrusions 32a, 32a, 32a. It is set so as to contact the antenna electrode 38. In addition, a slit 34 penetrating vertically is provided in the direction from the opening side to the back side between the lower surface and the back surface of the slot 32 of the dielectric block 30. The length of the slit 34 is formed to a position facing a second power feed pin 40 which will be described later in detail provided on the second antenna electrode 38. Further, the first antenna electrode 36 is disposed on the surface of the dielectric block 30 by a conductive thin film. Further, a second antenna electrode 38 made of a flat conductive metal plate is inserted into the slot 32 from the opening side. A portion of the second antenna electrode 38 is cut and raised to form the second feed pin 40. Then, the second antenna electrode 38 is inserted into the slot 32 from the opening side, and the tips of the protrusions 32a, 32a, 32a... Provided on the top surface and the bottom surface of the slot 32 come into contact with each other. The vertical position is restricted. When the second antenna electrode 38 is inserted into the slot 32, the second feed pin 40 cut and raised from the second antenna electrode 38 is inserted into the slit 34. The dielectric block 30 is provided with a first hole 42 penetrating in the vertical direction from the front surface to the back surface, the first power feed pin 44 is inserted, and the upper end portion thereof is soldered to the first antenna electrode 36. It is electrically connected by attaching. The first power supply pin 44 is set so that the second power supply pin 40 of the second antenna electrode 38 is inserted into a hole formed by cutting and raising and is not electrically connected to the second antenna electrode 38. . Further, the first power supply pin 44 and the second power supply pin 40 penetrate the slit 34 and protrude from the back surface of the dielectric block 30. Further, the dielectric block 30 such as a double-sided tape (not shown) is disposed and fixed on the ground electrode 46. The first hole 42 and the second hole 48 formed in the ground electrode 46 are respectively connected to the first hole 42 and the second hole 48. The power feed pin 42 and the second power feed pin 40 are inserted in a state where they are not electrically connected, and project downward from the ground electrode 46. The ground electrode 46 may be formed of a conductive metal plate, or may be formed of a conductive thin film provided on the surface of the circuit board.

  In the first embodiment of the dielectric antenna of the present invention having such a configuration, as shown in the antenna characteristic diagram of FIG. 5, the first antenna including the first antenna electrode 36 and the first feed pin 44 is used. Operates as an antenna in the ETC frequency band of 5.8 GHz, and operates as an antenna in the VICS frequency band of 2.5 GHz by the second antenna including the second antenna electrode 38 and the second feed pin 40. . FIG. 5 shows the antenna characteristics of the first antenna and the antenna characteristics of the second antenna. By the way, in the second antenna, between the second antenna electrode 38 and the ground electrode 46, the dielectric between the bottom surface of the dielectric block 30 and the bottom surface of the slot 32 and the bottom surface of the slot 32 are provided. The air layer between the second antenna electrodes 38 is interposed in series. Therefore, as shown in FIG. 6, the resonance frequency of the second antenna changes greatly as the distance of the air layer having a small relative permittivity is shorter. In the structure in which the second antenna electrode 38 is directly mounted on the lower surface of the slot 32 without providing the protrusions 32a, 32a... On the lower surface of the slot 32, the lower surface of the slot 32 and the second antenna electrode 38 are With the variation in the size of the gap between them, the resonance frequency of the second antenna is likely to shift greatly. Therefore, as in the first embodiment, by providing protrusions 32a, 32a... On the lower surface of the slot 32, the gap between the lower surface of the slot 32 and the second antenna electrode 38 is set to a constant size, so that the second The shift of the resonance frequency of the antenna can be suppressed. In the first embodiment, the opening distance a in the vertical direction of the slot 32 is 1 mm, and the height d of the protrusions 32a, 32a... Provided on the lower surface is 0.3 mm.

  In the first embodiment of the dielectric antenna of the present invention described above, it can be constructed at a low cost as compared to the one using the one dielectric block 30 and using two dielectric blocks as in the conventional example. Moreover, the positional relationship between the first antenna electrode 36 and the second antenna electrode 38 is constant, and no deviation occurs. Moreover, the trouble of arranging and fixing the two dielectric blocks in the upper and lower layers as in the conventional example is omitted, so that it is suitable for mass production.

  Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is an exploded perspective view of a second embodiment of the dielectric antenna of the present invention. FIG. 8 is a view taken in the direction of arrow D in the state assembled with the structure of FIG. 7 and 8, the same or equivalent members as those in FIGS. 1 to 4 are denoted by the same reference numerals and redundant description is omitted.

  The second embodiment of the dielectric antenna according to the present invention differs from the first embodiment in the following structure. First, the ridges 32a, 32a, 32a... Are not provided on the top and bottom surfaces of the slot 32 as in the first embodiment. The second antenna electrode 50 made of a conductive metal plate having elasticity has a cross section perpendicular to the insertion direction into the slot 32 bent in a zigzag shape. In addition, when the second antenna electrode 50 is inserted into the slot 32, the upper and lower end portions of the zigzag shape are formed so as to elastically contact the top and bottom surfaces of the slot 32, respectively. Then, the inserted second antenna electrode 50 is elastically supported in the slot 32 and the vertical position in the slot 32 is regulated.

  FIG. 9 is a longitudinal sectional view showing a modification of the second embodiment of the dielectric antenna of the present invention. In the modification of the second embodiment shown in FIG. 9, the second antenna electrode 52 made of a conductive metal plate having elasticity is formed by bending a cross section perpendicular to the insertion direction into the slot 32 into a wave shape.

  Furthermore, a third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is an external perspective view of a third embodiment of the dielectric antenna of the present invention. FIG. 11 is a cross-sectional view taken along the line E-E in FIG. 10. 10 and 11, the same or equivalent members as those in FIGS. 1 to 4 and FIGS. 7 to 9 are denoted by the same reference numerals, and redundant description is omitted.

  The third embodiment of the dielectric antenna according to the present invention differs from the first embodiment in the following configuration. First, the protrusions 32a, 32a, 32a... Are not provided on the top surface and the bottom surface of the slot 32 as in the first embodiment, and the slit 34 is not provided. The second antenna electrode 54 is disposed on the lower surface of the slot 32 by a conductive thin film. A ground electrode 56 made of a conductive thin film is also disposed on the back surface of the dielectric block 30. Further, a first hole 42 is formed through the first antenna electrode 36, the dielectric block 30, the second antenna electrode 54, and the ground electrode 56 vertically. The first power supply pin 44 is inserted into the first hole 42 and the upper end thereof is electrically connected to the first antenna electrode 36 by soldering or the like. The first power supply pin 44 is set so as not to be electrically connected to the second antenna electrode 54 and the ground electrode 56. Further, a second hole 48 is formed between the second antenna electrode 54 and the bottom surface of the slot 32 of the dielectric block 30 and the back surface and through the ground electrode 56 vertically. The second feed pin 40 is inserted into the second hole 48, and the upper end portion thereof is electrically connected to the second antenna electrode 54 by soldering or the like. Here, facing the second hole 48, a third hole 58 having a large diameter is formed so as to penetrate vertically from the surface of the dielectric block 30 to the top surface of the slot 32. An operation of soldering the second power feed pin 40 to the second antenna electrode 54 by inserting a soldering iron or the like into the hole 58 may be performed. The second power supply pin 40 is set so as not to be electrically connected to the ground electrode 56.

  In the third embodiment having such a configuration, since the first antenna electrode 36, the second antenna electrode 54, and the ground electrode 56 are all formed of a conductive thin film, the second antenna electrodes 38, 50, 52 are Compared to the first embodiment and the second embodiment configured with conductive metal plates, the overall weight can be easily reduced. It is also suitable for mass production. The ground electrode 56 does not necessarily have to be integrally provided on the back surface of the dielectric block 30, and may be disposed on an appropriate ground electrode 46 as in the first and second embodiments. good. Further, the second antenna electrode 54 may be disposed on the top surface of the slot 32 as long as the second power feed pin 40 can be appropriately electrically connected. The second antenna electrode 54 may be disposed on either the top surface or the bottom surface of the slot 32.

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a longitudinal sectional view of a fourth embodiment of the dielectric antenna of the present invention. In FIG. 12, the same or equivalent members as those in the other drawings are denoted by the same reference numerals, and redundant description is omitted.

  In the fourth embodiment of the dielectric antenna of the present invention, first, the second feed pin 40 is first electrically connected and fixed to the second antenna electrode 60 made of a conductive metal plate, and this member is molded metal. The dielectric block 62 is integrally formed with a dielectric material such as resin after being inserted into the mold. During the molding, the first hole 42 may be drilled or may be drilled appropriately after the integral molding. Then, the first antenna electrode 36 is provided by a conductive thin film on the surface of the dielectric block 62, and the upper end portion of the first power feed pin 44 inserted through the first hole 42 is appropriately connected to the first antenna electrode 36. Connected. The integrally formed dielectric block 62 is appropriately disposed on the ground electrode 46. The first power supply pin 44 is set so as not to be electrically connected to the second antenna electrode 60 and the ground electrode 46. The second power supply pin 40 is set so as not to be electrically connected to the ground electrode 46.

  In the fourth embodiment of the dielectric antenna of the present invention having such a configuration, the second antenna electrode 60 is inserted and the dielectric block 62 is integrally formed, so that the first and second embodiments are the same. In this way, the trouble of inserting the second antenna electrodes 38, 50, 52 into the slot 32 can be saved, which is suitable for mass production.

  FIG. 13 is a longitudinal sectional view showing a first modification of the fourth embodiment of the dielectric block of the present invention. In the first modification of the fourth embodiment shown in FIG. 13, a ground electrode 56 is provided on the back surface of the dielectric block 62 with a conductive thin film.

  FIG. 14 is a longitudinal sectional view showing a second modification of the fourth embodiment of the dielectric block of the present invention. In the second modification of the fourth embodiment shown in FIG. 14, the first feeding pin 44 is electrically connected and fixed in advance to the first antenna electrode 64 made of a conductive metal plate, and is grounded by the conductive metal plate. The electrode 66 is formed in advance, and the members of the first antenna electrode 64 and the ground electrode 66 as well as the second antenna electrode 60 are both inserted into the molding die, and the dielectric block 62 is integrated by a dielectric such as resin. Molded. In the second modified example, the assembling work is unnecessary and it is suitable for mass production.

  In the above embodiment, the first antenna and the second antenna have been described as operating as antennas in the respective frequency bands of ETC and VICS or VICS and GPS. However, the present invention is not limited to this, and ETC and GPS or Of course, combinations with other frequency bands are also possible. The first antenna and the second antenna may transmit / receive either a circularly polarized signal or a linearly polarized signal. Furthermore, in the first and second modifications of the third embodiment and the fourth embodiment, ground electrodes 56 and 66 are integrally disposed on the back surfaces of the dielectric blocks 30 and 62, respectively. One member can operate as an antenna. However, in the first embodiment, the second embodiment, and the fourth embodiment, the dielectric block 30, 62 can be operated on the ground electrode 46, but the dielectric block can be operated. The single elements 30 and 62 cannot operate as an antenna, and a single element forms a dielectric antenna element used to configure the antenna.

It is a disassembled perspective view of 1st Example of the dielectric antenna of this invention. It is an A arrow directional view of the state assembled with the structure of FIG. It is a BB arrow sectional view of Drawing 2. It is CC sectional view taken on the line of FIG. It is an antenna characteristic view of the first embodiment of the dielectric antenna of the present invention. It is a figure which shows the change of the resonant frequency by the vertical position of the 2nd antenna electrode within a slot. It is a disassembled perspective view of 2nd Example of the dielectric antenna of this invention. It is D arrow line view of the state assembled with the structure of FIG. It is a longitudinal cross-sectional view which shows the modification of 2nd Example of the dielectric antenna of this invention. It is an external appearance perspective view of 3rd Example of the dielectric antenna of this invention. It is EE arrow sectional drawing of FIG. It is a longitudinal cross-sectional view of 4th Example of the dielectric antenna of this invention. It is a longitudinal cross-sectional view which shows the 1st modification of 4th Example of the dielectric material block of this invention. It is a longitudinal cross-sectional view which shows the 2nd modification of 4th Example of the dielectric material block of this invention. It is an exploded perspective view of an example of a conventional dielectric antenna that operates in two frequency bands. It is a top view of the conventional dielectric antenna by which the 1st and 2nd dielectric block was arrange | positioned and shifted | deviated.

Explanation of symbols

12, 36, 64 First antenna electrode 16, 38, 50, 52, 54, 60 Second antenna electrode 18, 46, 56, 66 Ground electrode 20, 42 First hole 22, 44 First feed pin 24, 48 Second hole 26, 40 Second power supply pin 30, 62 Dielectric block 32 Slot 32a Projection 34 Slit 58 Third hole

Claims (13)

A dielectric block whose front and back surfaces are parallel is provided with a slot parallel to the front surface from a side surface, the dielectric block is provided on a ground electrode, and a first antenna electrode is provided on the surface of the dielectric block. A second antenna electrode is provided in the slot of the dielectric block, and a first hole penetrating the dielectric block, the second antenna electrode, and the ground electrode is formed in the vertical direction. A first feed pin is inserted into the hole and the upper end thereof is electrically connected to the first antenna electrode, and the first feed pin is electrically connected to the second antenna electrode and the ground electrode. A second hole penetrating vertically between the slot of the dielectric block and the back surface and the ground electrode, and a second power feed pin is inserted into the second hole. The upper end portion electrically connected to the second antenna electrode, moreover dielectric antenna, wherein the second feeding pin is configured not electrically connected to the ground electrode. A dielectric block whose front surface and back surface are parallel is provided with a slot parallel to the front surface from a side surface, a first antenna electrode is provided on the front surface of the dielectric block, and a second antenna is provided in the slot of the dielectric block. An antenna electrode is provided, a ground electrode is provided on the back surface of the dielectric block, a first hole penetrating the dielectric block, the second antenna electrode, and the ground electrode vertically is formed. A first feed pin is inserted into the hole and the upper end thereof is electrically connected to the first antenna electrode, and the first feed pin is electrically connected to the second antenna electrode and the ground electrode. A second hole penetrating vertically between the slot and the back surface of the dielectric block and the ground electrode, and a second feed pin is inserted into the second hole. Dielectric antenna electrically connecting the upper portion to the second antenna electrode, moreover, characterized in that said second feeding pin is configured not electrically connected to the ground electrode Te. 3. The dielectric antenna according to claim 1, wherein a conductive thin film is provided on the surface of the dielectric block to form the first antenna electrode, and a conductive metal plate is inserted into the slot from the opening on the side surface. The dielectric antenna is configured as the second antenna electrode. 4. The dielectric antenna according to claim 3, wherein a ridge that is long in the insertion direction of the conductive metal plate is provided on the top and bottom surfaces of the slot, respectively, and the tip of the ridge contacts the flat conductive metal plate. A dielectric antenna, wherein the dielectric antenna is configured so as to be in contact with and regulate a vertical position of the conductive metal plate in the slot. 4. The dielectric antenna according to claim 3, wherein the cross section perpendicular to the insertion direction of the conductive metal plate is bent into a zigzag shape or a wavy shape, and the upper and lower tips of the zigzag shape or the wavy shape are in contact with the top surface and the bottom surface of the slot. A dielectric antenna configured to regulate a vertical position of the conductive metal plate in the slot. 4. The dielectric antenna according to claim 3, wherein the conductive metal plate is cut and raised to form the second feed pin, and a second hole penetrating vertically is formed between the slot and the back surface of the dielectric block. Instead of providing a slit, a slit is provided that penetrates up and down from the opening on the side surface to a position facing the second hole, and the conductive metal is provided in the slit and the second hole formed in the ground electrode. A dielectric antenna, wherein the dielectric antenna is configured to be inserted through the second feed pin that is cut and raised. 3. The dielectric antenna according to claim 1, wherein a conductive thin film is disposed on the surface of the dielectric block to form the first antenna electrode, and a conductive thin film is disposed on one of the top surface and the bottom surface of the slot. The dielectric antenna is configured as the second antenna electrode. 3. The dielectric antenna according to claim 1, wherein the second feed pin is disposed between the surface of the dielectric block and the slot so as to face the second hole in the vertical direction. A dielectric antenna comprising a third hole for electrical connection to an electrode. 3. The dielectric antenna according to claim 2, wherein a conductive thin film is disposed on the back surface of the dielectric block to constitute the ground electrode. A second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted, and a dielectric block whose front and back surfaces are parallel is formed integrally, and the second antenna electrode is parallel to the front surface. The dielectric block is disposed on a ground electrode so as to be located in the middle between the front surface and the back surface, a first antenna electrode is provided on the front surface of the dielectric block, and the dielectric block and the A first hole penetrating up and down the second antenna electrode and the ground electrode is formed, and a first feeding pin is inserted into the first hole, and an upper end thereof is electrically connected to the first antenna electrode. The first power supply pin is not electrically connected to the second antenna electrode and the ground electrode, and the second power supply pin protrudes from the back surface of the dielectric block. Dielectric antenna, characterized in that said second feeding pin for output is constructed by inserted so as not to electrically connected to a second hole formed in the ground electrode. A second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted, and a dielectric block whose front and back surfaces are parallel is formed integrally, and the second antenna electrode is parallel to the front surface. The first antenna electrode is provided on the front surface of the dielectric block, a ground electrode is provided on the rear surface of the dielectric block, and the dielectric block and the back surface are positioned between the front surface and the back surface. A first hole penetrating up and down the second antenna electrode and the ground electrode is formed, and a first feeding pin is inserted into the first hole, and an upper end thereof is electrically connected to the first antenna electrode. And the first power supply pin is not electrically connected to the second antenna electrode and the ground electrode, and the second power supply pin protrudes from the back surface of the dielectric block. Dielectric antenna, characterized in that said second feeding pin to the protruding constructed by inserting so as not to electrically connected to a second hole formed in the ground electrode. A dielectric block whose front surface and back surface are parallel is provided with a slot parallel to the front surface from a side surface, a first antenna electrode is provided on the front surface of the dielectric block, and a second antenna is provided in the slot of the dielectric block. An antenna electrode is provided, a first hole penetrating vertically through the dielectric block and the second antenna electrode is formed, a first feeding pin is inserted into the first hole, and an upper end thereof is It is electrically connected to the first antenna electrode, and the first feed pin is not electrically connected to the second antenna electrode, and penetrates vertically between the slot and the back surface of the dielectric block. A dielectric antenna comprising a second hole, a second feed pin inserted into the second hole, and an upper end thereof electrically connected to the second antenna electrode. Element. A second antenna electrode made of a conductive metal plate provided with a second power feed pin is inserted, and a dielectric block whose front and back surfaces are parallel is formed integrally, and the second antenna electrode is parallel to the front surface. The first antenna electrode is provided on the front surface of the dielectric block so as to be located halfway between the front surface and the back surface, and a first penetrating vertically through the dielectric block and the second antenna electrode A hole is formed, a first power feed pin is inserted into the first hole, and an upper end portion thereof is electrically connected to the first antenna electrode, and the first power feed pin is connected to the second antenna. An element for a dielectric antenna, characterized in that the second power feed pin protrudes from the back surface of the dielectric block without being electrically connected to an electrode.