JPWO2012144084A1 - Compound antenna - Google Patents

Abstract

The present invention provides a composite antenna that can expand the frequency bandwidth to be used or increase the gain, has a simple structure, can be reduced in thickness, and does not take up space when mounted.
A conductive plate of a conductor, a conductor rod that is spaced apart from an opening of the conductive plate, and a conductor that is spaced from the conductive plate and connected to an upper end of the rod. The planar antenna 2 having a conductor plate antenna element 10 having a shape that gradually expands outward as the outer contour 15 of the lower portion 14 extends upward from the connecting portion 22 is formed on the same insulating substrate 40. A plurality of composite antennas 1 are provided.

Description

  The present invention relates to a wideband composite antenna suitable for use in UWB (Ultra Wide Band) communication, broadcasting, automobiles, logistics, IC chips, millimeter wave next-generation broadcasting communication systems, and the like.

  The applicant of the present application has previously proposed a three-dimensional antenna capable of reliably receiving and transmitting a broadband radio wave over several GHz, as shown in Patent Document 1 below. As shown in FIG. 15, the antenna 200 includes a spherical antenna element 201 in which slits 202 having a width of 0.5 mm are formed at intervals of 60 degrees along the circumferential direction on the outer peripheral surface, And a rod 205 erected via an insulating bush 204 at an opening 207 formed at the center of the conductive circular plate 203, and the antenna elements 201 are formed vertically. The rod 205 is attached in a skewered manner by a through hole 206 having a diameter of 2.5 mm. Since the rod 205 is connected to the core wire of the coaxial cable 209 by the connector 208, the antenna element 201 is electrically connected through the rod 205. The conductive plate 203 is connected to the shield line of the coaxial cable 209.

  In this configuration, the antenna element 201 is slidably attached to the rod 205, so that the distance from the conductive circular plate 203 to the antenna element 201 can be changed by sliding the antenna element 201. Impedance changes, matching adjustment becomes possible, and it is possible to reliably receive a broadband radio wave over several GHz.

  However, in recent years, UWB communication has been attracting attention, and a broadband antenna more suitable for UWB communication has been demanded. Further, there has been a demand for an antenna that can cover a very wide band of the GHz level or more by integrating antennas that need to be installed for each application, such as for TVs and mobile phones. Furthermore, it is a broadband antenna, an antenna that can receive and transmit weak radio waves without using a reflector such as a parabolic antenna, an antenna that can increase the reach of weak radio waves, and directivity A high antenna was demanded. In addition, when used by being mounted on automobiles, home appliances, etc., it has also been demanded to be small and thin.

Patent 4263722

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a composite antenna having a remarkably wide frequency bandwidth that can be used.

  It is another object of the present invention to provide a composite antenna having a long reach and capable of receiving even a wide band and a weak radio wave or transmitting a long distance.

  Furthermore, it is to provide a composite antenna having a wide band and high directivity.

  It is another object of the present invention to provide a composite antenna having a wide band and a simple structure that can be easily manufactured.

  It is another object of the present invention to provide a composite antenna that has a wide band, is small and thin, and does not become a place when mounted.

  In order to achieve the above object, a composite antenna according to claim 1 of the present invention includes a conductive plate of a conductor, a rod of a conductor spaced apart from an opening of the conductive plate, and a gap from the conductive plate. A planar antenna element of a conductor having a shape that is gradually expanded in the outer direction as the outer contour below the connecting portion connected to the upper end of the rod is upward. However, a plurality of components are arranged on the same insulating substrate.

  The composite antenna according to claim 2 of the present invention is the composite antenna according to claim 1, wherein the rod includes a base end portion disposed in an opening of the conductive plate, and the base end portion. And a projecting portion projecting upward from the conductive plate.

  The composite antenna according to claim 3 of the present invention is the composite antenna according to claim 2, wherein the rod has a width of the projecting portion wider than a width of the base end portion. Is.

  A composite antenna according to a fourth aspect of the present invention is the composite antenna according to any one of the first to third aspects, wherein the size of the plate antenna element included in at least one of the planar antennas is other. The planar antenna element has a size different from that of the plate antenna element.

  In addition, the composite antenna according to claim 5 of the present invention is the composite antenna according to any one of claims 1 to 3, wherein the planar antenna elements included in the planar antenna have the same size. It is characterized by.

  A composite antenna according to claim 6 of the present invention is the composite antenna according to claim 4, wherein at least one of the planar antennas is electrically connected.

  In order to achieve the above object, a composite antenna according to claim 7 of the present invention is connected to a rod having a base end portion and a projecting portion wider than a width of the base end portion, and an upper end of the projecting portion. A plurality of three-dimensional antennas having a shape that gradually expands outwardly as the outer contour of the lower part of the connecting portion extends upward, and an insulator is provided in each opening of the same conductive plate And a base end portion of the rod is erected.

  The composite antenna according to claim 8 of the present invention is the composite antenna according to claim 7, wherein the size of the antenna element provided in at least one of the three-dimensional antennas is provided in the other three-dimensional antenna. It differs from the size of the antenna element.

  The composite antenna according to claim 9 of the present invention is the composite antenna according to claim 7, characterized in that all the antenna elements included in the three-dimensional antenna have the same size. .

  According to claim 10 of the present invention, in the composite antenna according to claim 8, at least one of the three-dimensional antennas is electrically connected.

  The present invention has the following effects.

  In other words, the composite antenna according to the present invention having the above-described configuration has a shape in which the antenna element of each antenna gradually expands in the outer direction as the outer contour below the connection portion moves upward. Since a remarkably wide frequency band can be secured, a remarkably wide frequency band can be secured as a composite antenna.

  Furthermore, the rod of each antenna has a base end portion disposed at the opening of the conductive plate and a protruding portion protruding above the conductive plate, and a predetermined portion is provided between the antenna element and the conductive plate. Since the distance is secured and the width of the projecting part is wider than the width of the base end part, each antenna can secure a remarkably wide frequency band, and a wide frequency band can be secured as a composite antenna. Can do.

  In addition, when a plurality of antennas having the same antenna element size constitute a composite antenna, since it is received by a plurality of antennas, even a weak radio wave can be received as a composite antenna, Since the transmission power can be increased by synthesizing the radio waves of each antenna during transmission, even a weak radio wave can be transmitted far and the reach distance can be extended as a composite antenna.

  In addition, when multiple antennas with different antenna element sizes constitute a composite antenna, radio waves in different frequency bands are transmitted and received with different antenna element sizes. Can further widen the frequency band that can be secured, and can secure a remarkably wide frequency band.

  Furthermore, when a plurality of antennas having different antenna element sizes constitute a composite antenna, and a specific antenna is electrically connected, an antenna that is not electrically connected is electrically Since the gain of the radio wave of the antenna connected to can be increased, the directivity can be enhanced.

It is explanatory drawing of the composite type antenna which concerns on 1st Embodiment of this invention. It is explanatory drawing for demonstrating the other shape of the plate-shaped antenna element with which the planar antenna of the composite type antenna which concerns on this invention is provided. It is explanatory drawing for demonstrating the other shape of the rod with which the planar antenna of the composite type antenna which concerns on this invention is provided. It is a graph which shows the radiation characteristic of 1st Embodiment. It is a graph which shows the radiation characteristic of 1st Embodiment. It is explanatory drawing of the composite type antenna which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the composite type antenna which concerns on 3rd Embodiment of this invention. It is explanatory drawing of the composite type antenna which concerns on 4th Embodiment of this invention. It is explanatory drawing of the composite type antenna which concerns on another 4th Embodiment of this invention. FIG. 4 is an explanatory diagram of a state of disposing a planar antenna in the composite antenna according to the present invention. FIG. 4 is an explanatory diagram of a state of disposing a planar antenna in the composite antenna according to the present invention. FIG. 4 is an explanatory diagram of a state of disposing a planar antenna in the composite antenna according to the present invention. It is a perspective view of the composite type antenna which concerns on 5th Embodiment of this invention. It is sectional drawing of the composite type antenna which concerns on 5th Embodiment of this invention. It is a perspective view of the antenna using the conventional broadband three-dimensional antenna element.

  Embodiments of the present invention will be described below with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

First Embodiment FIG. 1 is an explanatory diagram of a composite antenna according to a first embodiment of the present invention, and FIG. 2 is an explanatory diagram for explaining another shape of a plate antenna element provided in a planar antenna. is there. FIG. 3 is an explanatory diagram for explaining another shape of the rod provided in the planar antenna.

  The composite antenna 1 according to the present invention includes two planar antennas 2 (2A1, 2A2) each including a plate antenna element 10, a rod 20, and a conductive plate 30, and an insulator such as Teflon (registered trademark). Arranged on the same substrate 40. The plate antenna element 10, the rod 20, and the conductive plate 30 provided in each of the planar antenna 2A1 and the planar antenna 2A2 have the same configuration. That is, since two (2A1, 2A2) identical planar antennas 2 are arranged, both will be described together.

  The planar antenna 2A1 and the planar antenna 2A2 are both electrically connected, and are arranged on the same surface on the insulating substrate and aligned in the lateral direction X.

  The plate-like antenna element 10 is a plate-like conductor, is formed of a metal such as copper or brass, and is electrically insulated from a conductive plate 30 described later. The interior 11 is also formed of a conductor such as metal, but as shown in FIG. 2A, the interior 11 may be hollow and the peripheral portion 12 may be formed of a thick frame 13.

  The shape of the plate antenna element 10 is such that the outer contour 15 of the lower portion 14 gradually expands in the outer direction as it goes upward from the connecting portion 22 connected to the upper end 21 of the rod 20 described later. In this embodiment, it is circular. As shown in FIG. 2 (2), the shape of the outer contour 15 gradually expanding in the outer direction as it goes upward is gradually increased in a curved manner in the outer direction as the outer contour 15 goes upward. The shape may be a shape, or as shown in FIG. 2 (3), the shape may be a shape in which the outer contour 15 gradually and linearly expands outward as it goes upward. It is important that the shape of the plate-like antenna element 10 is such that the outer contour 15 of the lower portion 14 gradually expands in the outer direction as it goes upward from the connection portion 22. As shown in FIGS. 2 (4) to (6), it may have any shape such as a flat shape, an elliptical shape, and a triangular shape.

  That is, the plate-like antenna element 10 is positioned below the plate-like antenna element 10 because the outer contour 15 of the lower portion 14 is gradually enlarged outward as the connection portion 22 moves upward. The electric wave gradually expands upward from the power supply unit.

  The rod 20 is a plate-like conductor, which is formed of a metal such as copper or brass, and is arranged in a protruding portion 23 protruding above the conductive plate 30 and an opening 31 of the conductive plate 30. The base portion 24 is provided, the width w1 of the projecting portion 23 is wider than the width w2 of the base portion 24, and a step 26 is formed at the boundary portion 25. In the present embodiment, the case where the protruding portion 23 is formed has been described. However, as shown in FIG. 3A, the protruding portion is not formed and only the base end portion 24 is used. May be. Further, as shown in FIG. 3B, the protruding portion 23 is formed, but the width w <b> 1 of the protruding portion 23 may be the same as the width w <b> 2 of the base end portion 24. Further, in the present embodiment, the case where the width w1 of the projecting portion 23 is wider than the width w2 of the base end portion 24 and the stepped portion 26 is formed at the boundary portion 25 has been described. In this way, the width w1 of the projecting portion 23 may be gradually narrowed and the stepped portion may not be formed at the boundary portion 25 with the base end portion 24. By forming the projecting portion 23 and making the width w1 of the projecting portion 23 larger than the width w2 of the base end portion 24, the planar antenna 10 can secure a wide frequency band. It is possible to secure a wider frequency band by optimizing the ratio of w1 / w2.

  The rod 20 is electrically insulated from the conductive plate 30, but is electrically connected to the plate antenna element 10 at the upper end 21 of the projecting portion 23, and the coaxial cable 50 at the lower end 27 of the base end portion 24. It is connected to a core wire and serves as a power feeding unit. A boundary portion 25 between the protruding portion 23 and the base end portion 24 serves as a feeding point. The protruding portion 23 functions as both a feeding portion and an antenna.

  The conductive plate 30 is a plate-like conductor and is formed of a metal such as copper or brass, and an opening 31 is formed at the center so that the base end portion 24 of the rod 20 can be disposed. . The conductive plate 30 is a ground plate and is connected to a shielded wire of a coaxial cable (not shown). Since the conductive plate 30 is disposed with a gap from the plate antenna element 10 and the rod 20, the conductive plate 30 is electrically insulated.

  As described above, in the composite antenna 1 according to the first embodiment, two (2A1, 2A2) flat antennas 2 each including the plate antenna element 10 having the same size are arranged in the horizontal direction X. Therefore, since the radio waves received by the respective planar antennas (2A1, 2A2) can be collected and the gain can be increased, the composite antenna 1 can receive even weak radio waves. The planar antenna 2 has a shape in which the shape of the plate-shaped antenna element 10 gradually expands outward as the outer contour 15 of the lower portion 14 moves upward from the connecting portion 22 connected to the upper end 21 of the rod 20. Therefore, it is possible to secure a wide frequency band, and the protruding portion 23 is formed on the rod 20, and the width w1 of the protruding portion 23 of the rod 20 is the width w2 of the base end portion 24. Since it is wider, a wider frequency band can be secured. Accordingly, since two planar antennas 2 (2A1, 2A2) having a wide frequency band are gathered, the composite antenna 1 can be an antenna having the same wide frequency band as the planar antenna 2A or the planar antenna 2B.

  FIG. 4 shows the vertical polarization horizontal plane (XZ plane) directivity at 1000 MHz in the composite antenna 1.

  FIG. 5 shows the vertical polarization vertical plane (XY plane) directivity at 1000 MHz in the composite antenna 1.

Second Embodiment FIG. 6 is an explanatory diagram of a composite antenna according to a second embodiment of the present invention. Differences from the first embodiment will be described below.

  In the composite antenna 1 according to the second embodiment of the present invention, four planar antennas 2 (2A1, 2A2, 2A3, 2A4) are arranged in the horizontal direction X on the same insulating substrate 40, and the insulation The substrate 40 is bent at the center 41, and the two planar antennas 2 are in two pairs (M (2A1, 2A2) and N (2A3, 2A4)) and face each other diagonally. The form is the same. That is, the plate antenna element 10, the rod 20, and the conductive plate 30 included in each of the planar antennas 2A1 to 2A4 have the same configuration.

  In the second embodiment, radio waves from two sets of plane antennas (M (2A1, 2A2) and N (2A3, 2A4)) facing each other are combined to increase transmission power. Even if it is weak, the composite antenna 1 can transmit far and extend the reach.

Third Embodiment FIG. 7 is an explanatory diagram of a composite antenna according to a third embodiment of the present invention. Differences from the first embodiment will be described below.

  In the composite antenna 1 according to the third embodiment of the present invention, the size (effective height h1) of the antenna element 10A provided in the planar antenna 2A and the width (w11, w21) of the rod 20A are provided in the planar antenna 2B. Although it differs from the size (effective height h2) of the element 10B and the width (w12, w22) of the rod 20B, the rest is the same as in the first embodiment. When the size (effective height h) of the antenna element 10 is different, the frequency band of radio waves that can be transmitted and received is different. The smaller the size (effective height h) of the antenna element 10 is, the lower the frequency shifts to the high frequency band. Therefore, the composite antenna 1 in which two planar antennas (2A, 2B) including the antenna elements 10 having different sizes (effective heights h) are arranged can ensure a wide frequency band in different frequency bands. Since two antennas (2A, 2B) are provided, the combined antenna 1 can be a frequency band that combines the frequency bands of two (2A, 2B) planar antennas. An even wider frequency band can be secured. The rod width (w1, w2) is preferably changed in proportion to the size of the antenna element 10 (effective height h).

  That is, in the composite antenna 1 according to the third embodiment, like the composite antenna 1 of the first embodiment, the planar antenna 2 has the shape of the plate antenna element 10 and the outer contour 15 of the lower portion 14 has the rod 20. Since the shape gradually expands in the outer direction as it goes upward from the connecting portion 22 connected to the upper end 21, a wide frequency band can be secured, and the rod 20 has a protruding shape. Since the projecting portion 23 is formed and the width w1 of the projecting portion 23 of the rod 20 is wider than the width w2 of the base end portion 24, a wider frequency band can be secured. In addition, unlike the first embodiment, the size (effective height h1) of the plate antenna element 10A included in the planar antenna 2A and the size (effective height h2) of the plate antenna element 10B included in the planar antenna 2B. ), The planar antenna 2A and the planar antenna 2B have different frequency bands that can be ensured. Therefore, the first planar antenna having two planar antenna elements 10 having the same size (effective height h) is provided. It becomes possible to make the composite antenna 1 capable of securing a wider frequency band than the composite antenna 1 of the embodiment.

Fourth Embodiment FIG. 8 is an explanatory diagram of a composite antenna according to a fourth embodiment of the present invention. Differences from the third embodiment will be described below.

  Unlike the third embodiment, the composite antenna 1 according to the fourth embodiment of the present invention is the size (effective height) of the antenna element 10A among the two planar antennas 2 arranged side by side in the X direction. The planar antenna 2A having a large length h1) is electrically connected, but the planar antenna 2B having a small size (effective height h2) of the antenna element 10B is not electrically connected.

  Therefore, in the composite antenna 1 according to the fourth embodiment, since the planar antenna 2A functions as a so-called transmitter / receiver and the planar antenna 2B functions as a so-called director, the radio wave of the planar antenna 2A that secures a wide frequency band can be obtained. Since the planar antenna 2B increases the directivity in the X direction as a director, the composite antenna 1 can ensure a wide frequency band and can be an antenna with improved directivity.

  In the fourth embodiment, the case where there are two planar antennas has been described. However, as shown in FIG. 9, the size (effective height h) of the antenna element 10 and the width (w1, w2) of the rod 20 are set. Four different planar antennas 2 (2A, 2B, 2C, 2D) may be provided, and only the central planar antenna 2B may be electrically connected. In this case, since the planar antenna 2A functions as a reflector and the planar antenna 2C and the planar antenna 2D function as a director with respect to the planar antenna 2B that functions as a transmitter / receiver, the directivity is further improved in the X direction. It becomes possible.

  In the first and third embodiments, the case where two planar antennas are provided has been described. However, the number of planar antennas 2 may be any number, and the size (effective height) of the antenna element 10 may be any number. The length h) and the width (w1, w2) of the rod 20 may be any case. That is, as shown in FIG. 10, three planar antennas having different sizes (effective height h) of the antenna element 10 and widths (w1, w2) of the rod 20 may be provided. .

  Further, not only when the planar antennas 2 are arranged in the X direction, but also as shown in FIG. 11, the planar antennas having the same size (effective height h) of the antenna element 10 and the widths (w1, w2) of the rods 20 are the same. 2 are arranged in three in the X direction, and three planar antennas 2 having different sizes (effective height h) of the antenna elements 10 and widths (w1, w2) of the rods 20 are arranged in the Y direction. Or, as shown in FIG. 12, three planar antennas 2 having different sizes (effective heights h) of antenna elements 10 and widths (w1, w2) of rods 20 are arranged in the X direction, and antenna elements in the Y direction. It may be a case where three planar antennas 2 having the same size (effective height h) and the same width (w1, w2) of the rod 20 are arranged three by three.

Fifth Embodiment FIG. 13 is a perspective view of a composite antenna according to a fifth embodiment of the present invention, and FIG. 14 is a sectional view thereof.

  Unlike the above-described first to fourth embodiments, the composite antenna 100 according to the fifth embodiment of the present invention is a case where the composite antenna 100 is configured by a three-dimensional antenna 101.

  In the composite antenna 100 according to the present invention, four three-dimensional antennas 101 (101A, 101B, 101C, 101D) each including an antenna element 110 and a rod 120 are erected on a conductive plate 130 having the same conductor. The antenna elements (110A, 110B, 110C, 110D) and the rods (120A, 120B, 120C, 120D) included in each of the three-dimensional antennas 101A1 to 101D are the size of the antenna element 110 (effective height h) and the diameter of the rod 120 ( The configuration is the same except that r1 and r2) are sequentially reduced. The three-dimensional antenna 101B is electrically connected, but the other three-dimensional antennas (101A, 101C, 101D) are not electrically connected. Hereinafter, the content common to the three-dimensional antenna 101A will be described first.

  The antenna element 110A has a three-dimensional shape in which the outer contour 115A of the lower portion 114A gradually expands outward in four directions from the connecting portion 122A connected to the upper end 121A of the rod 120A described later. In the embodiment, a sphere is used. The interior 111A of the antenna element 110A can be hollow, and the peripheral portion 112A is formed of a conductor such as metal (for example, copper or brass). Note that the inside 111A may be formed of an insulator, and a metal thin film may be plated on the peripheral surface. Since the shape of the antenna element 110A is a three-dimensional shape that gradually expands outward in four directions as the outer contour 115A of the lower portion 114A extends upward from the connecting portion 122A, a wide frequency band can be secured. ing.

  The rod 120A is formed of a metal (for example, copper or brass) conductor, and has a protruding portion 123A and a base end portion 124A. A diameter r11 of the protruding portion 123A is larger than a diameter r21 of the base end portion 124A, and a step 126A is formed at the boundary portion 125A. Note that the diameter r11 of the projecting portion 123A may be gradually narrowed, and the stepped portion may not be formed at the boundary portion 125A with the base end portion 124A. By forming the protruding portion 123A and making the diameter r11 of the protruding portion 123A larger than the diameter r21 of the base end portion 124A, the three-dimensional antenna 101A can ensure a wide frequency band. Note that it is possible to secure a wider frequency band by optimizing the ratio of r11 / r21.

  The conductive plate 130 is formed of a conductor, and the opening 131 for standing the three-dimensional antenna 101 is opened by the number of the three-dimensional antennas 101 (four in FIG. 13). The conductive plate 130 is formed from a metal (for example, copper or brass).

  In the three-dimensional antenna 101, a base end portion 124 of a rod 120 is erected on an opening 131 of a conductive plate 130 via an insulator 140 such as Teflon (registered trademark). The conductive plate 130 is a ground plate.

  Next, the differences between the three-dimensional antenna 101B and the three-dimensional antenna 101A that are electrically connected will be mainly described. The size (effective height h2) of the antenna element 110B of the three-dimensional antenna 101B is formed to be smaller than the size (effective height h1) of the antenna element 110A of the three-dimensional antenna 101A, and accordingly, the rod diameter (r12, r22). ) Is also thinner than the diameter (r11, r21) of the rod of the three-dimensional antenna 101A.

  The rod 120B of the three-dimensional antenna 101B is electrically insulated from the conductive plate 130 through the insulator 140, but is connected to the core wire of the coaxial cable 50 at the lower end 127B of the base end portion 124B and electrically To be a power feeding unit. Further, since the antenna element 110B is connected by the connecting portion 122B of the upper end 121B, the antenna element 110B and the rod 120B are electrically connected. A boundary portion 125B between the protruding portion 123B and the base end portion 124B of the rod 120B serves as a feeding point, and the protruding portion 123B functions as both a feeding portion and an antenna. Although not shown, a shielded wire of a coaxial cable is connected to the conductive plate 130.

  The three-dimensional antennas 101C and 101D are not electrically connected. The size (effective height h3) of the antenna element 110C of the three-dimensional antenna 101C is formed to be smaller than the size (effective height h2) of the antenna element 110B of the three-dimensional antenna 101B, and accordingly the rod diameter (r13, r23). ) Is also smaller than the diameter (r12, r22) of the rod of the three-dimensional antenna 101B. In addition, the size (effective height h4) of the antenna element 110D of the three-dimensional antenna 101D is smaller than the size (effective height h3) of the antenna element 110C of the three-dimensional antenna 101C, and accordingly, the rod diameter (r14). , R24) is also thinner than the rod diameter (r13, r23) of the three-dimensional antenna 101C.

  In the composite antenna 100 having the above configuration, the three-dimensional antenna 101B is electrically connected, but the other three-dimensional antennas (101A, 101C, 101D) are not electrically connected. In contrast, since the three-dimensional antenna 101A functions as a reflector and the three-dimensional antenna 101C and the three-dimensional antenna 101D function as a director, directivity can be increased in the direction of the three-dimensional antenna 101C and the three-dimensional antenna 101D, that is, the X direction. It is possible.

  Further, the shape of the antenna element 110B of the three-dimensional antenna 101B is a three-dimensional shape that gradually expands in the outer direction of the four sides as the outer contour 115B of the lower portion 114B is directed upward from the connection portion 122B, so that a wide frequency band is secured. Further, the rod 120B has a projecting portion 123B, and the diameter r12 of the projecting portion 123B is larger than the diameter r22 of the base end portion 124B, so that a wide frequency band can be secured. Therefore, the three-dimensional antenna 101B is an antenna that can secure a wide frequency band, and thus the composite antenna 100 can be a highly directional antenna that can secure a wide frequency band.

  Note that the composite antenna 100 in which a plurality of three-dimensional antennas 101 are erected on the same conductive plate can be modified in the same manner as the composite antenna 1 in which a plurality of planar antennas 2 are disposed on the same insulating substrate. is there. That is, a plurality of the three-dimensional antennas 101 having different sizes of the antenna elements 110 may be all electrically connected, or the antenna elements 110 are all the same size and all the three-dimensional antennas 101 are electrically connected. Needless to say, the function and effect are the same as those of the composite antenna 1 including the planar antenna 2.

1,100 Composite antenna 2 (including 2A, 2B, 2C, etc.) Planar antenna 10 Plate antenna element 11, 111 Inside 12, 112 Peripheral part 13 Frame body 14, 114 Lower part 15, 115 Outer contour 16 Upper part 20, 120 Rod 21, 121 Upper end 22, 122 Connecting portion 23, 123 Projecting portion 24, 124 Base end portion 26, 125 Boundary portion 26, 126 Stepped 27, 127 Lower end 30, 130 Conductive plate 31, 131 Opening portion 40 Substrate 50 Coaxial cable 101 Three-dimensional antenna 110 Antenna element 140 Insulator h (including h1, h2, h3, h4) Size of antenna element (effective height)
w1 (including w11, w12, w13, w14, etc.) Width of the protruding portion of the planar antenna w2 (including w21, w22, w23, w24, etc.) Width of the base end portion of the planar antenna r1 (r11, r12, r13, r2 (including r14, etc.) Diameter of the protruding portion of the three-dimensional antenna r2 (including r21, r22, r23, r24, etc.) Diameter of the base end of the three-dimensional antenna

Claims (10)

A conductive plate of conductor;
A conductor rod disposed apart from the opening of the conductive plate;
A plate-like antenna element of a conductor which is disposed apart from the conductive plate and has a shape that gradually expands outwardly as the outer contour below the connecting portion connected to the upper end of the rod is directed upward; A planar antenna comprising
A composite antenna, wherein a plurality of antennas are arranged on the same insulating substrate. The composite antenna according to claim 1, wherein
The rod has a base end portion disposed in an opening of the conductive plate, and a projecting portion connected to an upper portion of the base end portion and projecting above the conductive plate. A composite antenna. The composite antenna according to claim 2, wherein
The composite antenna according to claim 1, wherein a width of the protruding portion is wider than a width of the base end portion. The composite antenna according to any one of claims 1 to 3,
The composite antenna, wherein a size of the plate antenna element included in at least one of the planar antennas is different from a size of the plate antenna element included in the other planar antenna. The composite antenna according to any one of claims 1 to 3,
The composite antenna, wherein the planar antenna elements included in the planar antenna have the same size. The composite antenna according to claim 4, wherein
At least one of the planar antennas is electrically connected. A rod having a base end portion and a protruding portion wider than the width of the base end portion;
A plurality of three-dimensional antennas having the same conductive property, and a conductor antenna element having a shape that gradually expands outwardly as the outer contour of the lower part of the connecting part connected to the upper end of the protruding part is directed upward A composite antenna, characterized in that a base end portion of the rod is erected on an opening of each plate through an insulator. The composite antenna according to claim 7, wherein
The size of the antenna element included in at least one of the three-dimensional antennas is different from the size of the antenna element included in the other three-dimensional antenna. The composite antenna according to claim 7, wherein
All the antenna elements with which the said three-dimensional antenna is provided are the same size, The composite type | mold antenna characterized by the above-mentioned. The composite antenna according to claim 8, wherein
The composite antenna, wherein at least one of the three-dimensional antennas is electrically connected.