JP2009231926A - Antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and thin antenna device capable of receiving or transmitting radio waves in two frequency bands. <P>SOLUTION: In the antenna device, a coil 17, which interrupts a UHF band signal and operates as a loading coil to an FM band signal, is connected between the tips of respective adjacent antenna elements 4, 8 of an Alford loop antenna receiving UHF broadcast, and a loop antenna receiving FM broadcast includes the coil 17, the antenna elements 4, 8 connected via the coil 17, and lines 5, 9, thus receiving or transmitting both of FM and UHF broadcasting radio waves. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an antenna device, and more particularly to an antenna device provided with an alhode loop antenna.

Conventionally, an alhode loop antenna is known as an omnidirectional antenna device for receiving or transmitting horizontally polarized waves. In this alhode loop antenna, a plurality of (for example, eight) arc-shaped antenna elements are arranged in a circle, and a pair of adjacent antenna elements constitute a dipole antenna (see, for example, Non-Patent Document 1). ).
Antenna Engineering Handbook, 64 pages, edited by IEICE, published by Ohmsha

  However, in the conventional alhod loop antenna, the frequency band of radio waves that can be received or transmitted is determined depending on the size thereof. For example, radio waves of FM (Frequency Modulation) broadcasting and radio waves of UHF (Ultra High Frequency) broadcasting are received or transmitted. For this purpose, it is necessary to provide two antennas for FM broadcasting and UHF broadcasting, and there is a problem that the size of the apparatus increases.

  Therefore, a main object of the present invention is to provide a small and thin antenna device capable of receiving or transmitting radio waves in two frequency bands.

  The antenna device according to the present invention includes an alhode loop antenna having a first resonance frequency. The alhode loop antenna is arranged in a circular or polygonal shape, each of which has a plurality of dipole antennas having first and second antenna elements, and first and second antennas provided at the center of the alhode loop antenna. A feed point, a first wire connected between the base end of the first antenna element of each dipole antenna and the first feed point, and a base end of the second antenna element of each dipole antenna; And a second wiring connected between the second feeding point. The antenna device is further connected between the tip portions of the adjacent first and second antenna elements, cuts off a signal of the first resonance frequency, and has a second resonance lower than the first resonance frequency. A coil that operates as a loading coil with respect to a signal of a frequency, and the first and second antenna elements and the first and second wirings connected via the coil have a second resonance frequency. It is characterized by comprising a loop antenna.

  Preferably, it further includes a resonant element provided along each of the first and second antenna elements included in each dipole antenna, for expanding the frequency band of the dipole antenna.

  Preferably, the apparatus includes two substrates provided in parallel vertically, and the first antenna element, the first feeding point, and the first wiring are formed on one of the two substrates, The second antenna element, the second feeding point, and the second wiring are formed on the other substrate, and the resonance element is provided between the two substrates.

  Preferably, the apparatus includes a single substrate, the first antenna element, the first feeding point, and the first wiring are formed on the surface of the substrate, and the second antenna element, the second feeding point, and the first wiring The second wiring is formed on the back surface of the substrate, and the resonant element is provided outside the first and second antenna elements.

  Preferably, the apparatus includes a single substrate, and the first antenna element, the first feeding point, and the first wiring are formed on the surface of the substrate, and the second antenna element, the second feeding point, The second wiring is formed on the back surface of the substrate, and the resonant element is provided inside the first and second antenna elements.

  Further preferably, each further includes first and second stubs each having a length of approximately a quarter wavelength of the signal of the first resonance frequency and orthogonal to the first and second wirings, respectively.

  In the antenna device according to the present invention, the signal of the first resonance frequency is blocked between the tips of the adjacent first and second antenna elements of the alhode loop antenna having the first resonance frequency, A coil that operates as a loading coil is connected to a signal having a second resonance frequency lower than the resonance frequency of the first coil, the coil, the first and second antenna elements connected through the coil, and the first The second wiring constitutes a loop antenna having a second resonance frequency. Therefore, a small and thin antenna device capable of receiving or transmitting radio waves in two frequency bands can be realized.

  FIG. 1A is a perspective view showing a main part of an antenna device according to an embodiment of the present invention, and FIG. 1B is a front view showing the main part of the antenna device shown in FIG. It is.

  1A and 1B, this antenna device includes a circular printed circuit board 1 arranged horizontally, a circular printed circuit board 2 arranged horizontally above the printed circuit board 1, and two printed circuit boards. And four resonant elements 3 disposed between 1 and 2. The printed boards 1 and 2 and the resonance element 3 are fixed via an insulating member (not shown). The diameter of the printed boards 1 and 2 is 350 mm, for example, and the distance between the conductive layers 1a and 2a on the surface of the printed boards 1 and 2 is 25 mm, for example.

  In addition, as shown in FIG. 2A, this antenna device includes four antenna elements 4, four wires 5, four stubs 6, and a power feeding formed by the conductive layer 1a on the surface of the printed circuit board 1. A point P1 is provided. A circle 7 that is the outer periphery of the printed circuit board 1 is equally divided into eight arcs, and the antenna element 4 is formed in an arc shape along the inside of each odd-numbered arc. The antenna element 4 has a width of 6 mm, for example, and a length of 137 mm, for example.

  The feeding point P1 is formed at the center point of the surface of the printed circuit board 1. The wiring 5 is connected between the feeding point P1 and one end of each antenna element 4 (left end as viewed from the feeding point P1). The length of the wiring 5 is 175 mm, for example.

  The four stubs 6 are provided corresponding to the four wires 5, respectively. Each stub 6 and the corresponding wiring 5 are orthogonal to the feeding point P1, for example, at a position of 100 mm. Each stub 6 has a width of 6 mm, for example, and a length of 140 mm, for example. The stub 6 is provided to reduce the VSWR (Voltage Standing Wave Ratio) of the antenna device.

  In other words, in the circle 7, when the 12 o'clock position of the watch is 0 degree, the four antenna elements 4 are inside the arcs of 0 to 45 degrees, 90 to 135 degrees, 180 to 225 degrees, and 270 to 315 degrees, respectively. The four wirings 5 are formed at positions of 0 degrees, 90 degrees, 180 degrees, and 270 degrees, respectively, and the four stubs 6 are respectively formed at 0 degrees, 90 degrees, 180 degrees, and It is formed at a position of 270 degrees. Each of the antenna element 4 and the stub 6 is set to about a quarter of the wavelength of the radio wave of UHF broadcasting.

  In addition, as shown in FIG. 2B, this antenna device includes four antenna elements 8, four wirings 9, four stubs 10, and a power feed formed by the conductive layer 2a on the surface of the printed circuit board 2. A point P2 is provided. The circle 11 that is the outer periphery of the printed circuit board 2 is equally divided into eight arcs, and the antenna element 8 is formed in an arc shape along the inside of each even-numbered arc. The antenna element 8 has a width of 6 mm, for example, and a length of 137 mm, for example.

  The feeding point P2 is formed at the center point of the surface of the printed circuit board 2. The wiring 9 is connected between the feeding point P2 and one end of each antenna element 8 (right end as viewed from the feeding point P2). The length of the wiring 9 is 175 mm, for example.

  The four stubs 10 are provided corresponding to the four wires 9, respectively. Each stub 10 and the corresponding wiring 9 are orthogonal to the feeding point P2, for example, at a position of 100 mm. Each stub 10 has a width of, for example, 6 mm and a length of, for example, 140 mm. The stub 10 is provided for reducing the VSWR of the antenna device.

  In other words, if the 12 o'clock position of the watch is 0 degree in the circle 11, the four antenna elements 8 are inside the arcs of 45 to 90 degrees, 135 to 180 degrees, 225 to 270 degrees, and 315 to 360 degrees, respectively. The four wirings 9 are formed at positions of 0 degrees, 90 degrees, 180 degrees, and 270 degrees, respectively, and the four stubs 10 are formed at 0 degrees, 90 degrees, 180 degrees, and 270, respectively. It is formed at the position of degrees. Further, each of the antenna element 11 and the stub 10 is set to about one quarter of the wavelength of the radio wave of UHF broadcasting.

  Further, as shown in FIG. 2C, the four resonant elements 3 have the same diameter as the circles 7 and 11 and 0 degrees and 90 degrees along the inside of the circle 12 located in the middle of the circles 7 and 11, respectively. , 180 degrees, and 270 degrees are formed in an arc shape. The center of the resonance element 3 is disposed so as to face the front ends of the wirings 5 and 9 (ends on the side opposite to the feeding points P1 and P2). The resonant element 3 is formed of a thin metal plate, for example, and is disposed between the conductive layers 1a and 2a of the printed boards 1 and 2. The linear distance from one end of the resonance element 3 to the other end is, for example, 200 mm. Therefore, the resonant element 3 is provided to face each of the corresponding antenna elements 4 and 8 in a range between the central part of the corresponding antenna element 4 and the central part of the corresponding antenna element 8. The resonant element 3 is provided to widen the frequency band of the corresponding antenna elements 4 and 8.

  FIG. 3 is a diagram showing a main part and an electric circuit part of the antenna device. In FIG. 3, the antenna device includes four sets of antenna elements 4 and 8, four sets of wirings 5 and 9, and two feed points P1 and P2, which constitute an alhode loop antenna. A pair of antenna elements 4 and 8 connected to the wirings 5 and 9 arranged above and below at the same position constitute a dipole antenna 13. Therefore, this antenna device includes four sets of dipole antennas 13 oriented in four directions.

  This antenna device is used to receive or retransmit radio waves of FM broadcast and UHF television broadcast. Therefore, each of the antenna elements 4 and 8 is set to have a length of approximately a quarter wavelength of a radio wave of UHF television broadcasting. In Japan, the frequency range of radio waves for UHF television broadcasting is 470 to 770 MHz (13 to 62 channels). In particular, for terrestrial digital television broadcasting, the frequency range is 470 to 590 MHz.

  The antenna device is connected to the television receiver or the retransmission device via the coaxial line 14. This retransmission apparatus will be described later. The outer conductor (ground line) of the coaxial line 14 is connected to the feeding point P 1, and the inner conductor (signal line) of the coaxial line 14 is connected to the feeding point P 2 through a parallel connection body of the capacitor 15 and the coil 16.

  The capacitance value of the capacitor 15 is set so as to pass a signal in the frequency band of UHF television broadcasting and cut off a signal in the frequency band of FM broadcasting, for example, 4.5 pF. Further, the inductance of the coil 16 is set so that signals in the frequency band of FM broadcasting are allowed to pass and signals in the frequency band of UHF television broadcasting are blocked. As the coil 16, for example, a copper wire having a wire diameter of 0.9 mm wound eight times so that the diameter is 6 mm is used. Therefore, unnecessary signals other than FM broadcast and UHF television broadcast are blocked by the capacitor 15 and the coil 16.

  In addition, this antenna device includes a coil 17 connected between tip portions (end portions not connected to the wirings 5 and 9) of the adjacent antenna elements 4 and 8. The inductance of the coil 17 is set so that a signal in the frequency band of UHF television broadcasting is blocked and the coil 17 operates as a loading coil for a signal in the frequency band of FM broadcasting. As the coil 17, for example, a coil in which a copper wire having a wire diameter of 0.9 mm is wound five times so that the diameter is 6 mm and a copper wire having a wire diameter of 0.9 mm is wound seven times so that the diameter is 15 mm. A series connection body of a coil wound and a coil formed by winding a copper wire having a wire diameter of 0.9 mm five times so as to have a diameter of 6 mm is used.

  By providing this coil 17, for the frequency band signal of FM broadcasting, the coil 17, the antenna element 4 and the wiring 5 connected to one terminal of the coil 17, and the other terminal of the coil 17 are connected. The connected antenna element 8 and wiring 9 constitute a loop antenna having a loading coil.

  Therefore, this antenna device operates as four dipole antennas 13 oriented in four directions of 0 degrees, 90 degrees, 180 degrees, and 270 degrees with respect to signals in the frequency band of UHF television broadcasting. For a signal in the frequency band of, it operates as four loop antennas oriented in four directions of 45 degrees, 135 degrees, 225 degrees, and 315 degrees. Further, since the four dipole antennas 13 and the four loop antennas are commonly connected to the feeding points P1 and P2, omnidirectionality can be obtained on the horizontal plane.

  4A and 4B are diagrams showing the gain of the antenna device and the frequency characteristics of the VSWR in the FM band, and FIGS. 5A and 5B show the gain of the antenna device and the frequency characteristics of the VSWR in the UHF band. FIG. From these FIGS. 4 (a) (b) and FIGS. 5 (a) (b), it can be seen that this antenna apparatus has a sufficiently high gain and a sufficiently low VSWR in both the FM band and the UHF band. FIGS. 6A and 6B are diagrams showing the directivity in the FM band and the UHF band of the antenna device. 6 (a) and 6 (b), it can be seen that this antenna device exhibits good omnidirectionality in both the FM band and the UHF band.

  FIG. 7 is a diagram illustrating a method of using this antenna device. In FIG. 7, this antenna device is used as a retransmission antenna 20. The retransmission antennas 20 are installed at predetermined intervals on the ceiling of the underground shopping street 21. Radio waves of FM broadcasting and UHF television broadcasting are received by a receiving antenna 22 installed outdoors, and converted into an optical signal by an electrical / optical converter (E / O) 23. This optical signal is transmitted to the optical / electrical converter 25 via the optical fiber 24 and converted into an electrical signal. This electric signal is amplified by a power amplifier (P / A) 26, supplied to the retransmission antenna 20 via the coaxial line 14, and transmitted into the underground shopping area 21. Thereby, FM broadcast and UHF television broadcast can be viewed even in the underground mall 21. Moreover, since the re-transmission antenna 20 is small and thin, it can be easily installed on the ceiling of the underground shopping center 21 without damaging the aesthetic appearance.

  The antenna device can also be used as an outdoor antenna or an indoor antenna that receives both FM broadcast and UHF broadcast. In the conventional indoor antenna, the rod antenna for receiving FM broadcast or VHF broadcast protrudes from the main body. However, since this antenna device has no protrusion, the installation space can be small.

  In this embodiment, the antenna element 4, the wiring 5, the stub 6, and the feeding point P <b> 1 are provided on the front surface side of the printed circuit board 1, but they may be provided on the back surface side of the printed circuit board 1. Further, although the antenna element 8, the wiring 9, the stub 10, and the feeding point P <b> 2 are provided on the front side of the printed board 2, they may be provided on the back side of the printed board 2. Further, although the antenna elements 4 and 8, the wirings 5 and 9, the stubs 5 and 10, and the feeding points P1 and P2 are formed by the conductive layers 1a and 2a of the printed boards 1 and 2, they may be formed by sheet metal. .

  8 (a) and 8 (b) are diagrams showing a modified example of this embodiment. In particular, FIG. 8 (a) is a diagram contrasted with FIG. 1 (b), and FIG. ) Is a diagram contrasted with FIG. 8A and 8B, in this modification, one circular double-sided printed board 30 is used. The antenna element 4, the wiring 5, the stub 6, and the feeding point P 1 are formed by one side conductive layer 30 a of the printed circuit board 30, and the antenna element 8, the wiring 9, the stub 10, and the feeding point P 2 are conductive on the other side of the printed board 30. The resonance element 3 is formed of the layer 30 b and is disposed outside the printed circuit board 30 along the corresponding antenna elements 4 and 8. FIG. 8B is a view of the antenna device as viewed from above with the other conductive layer 30b and the insulating substrate removed from the printed circuit board 30. FIG. Even in this modified example, the same effect as the embodiment can be obtained.

  9 (a) and 9 (b) are diagrams showing another modified example of this embodiment. In particular, FIG. 9 (a) is a diagram contrasted with FIG. 1 (b). (B) is a figure contrasted with FIG. 2 (a). 9A and 9B, in this modification, one circular double-sided printed circuit board 30 is used. The resonant element 3, the antenna element 4, the wiring 5, the stub 6, and the feeding point P1 are formed by one conductive layer 30a of the printed circuit board 30, and the antenna element 8, the wiring 9, the stub 10, and the feeding point P2 are formed by the printed circuit board 30. Of the other conductive layer 30b. The resonant element 3 is disposed inside the antenna elements 4 and 8 along the corresponding antenna elements 4 and 8. FIG. 9B is a view of the antenna device as viewed from above with the other conductive layer 30b and the insulating substrate removed from the printed circuit board 30. FIG.

  However, in the embodiment, the resonant element 3 is provided in common to the antenna elements 4 and 8 constituting the dipole antenna 13, whereas in this modified example, the resonant element 3 includes two adjacent dipole antennas 13. The antenna element 4 of one of the dipole antennas 13 and the antenna element 8 of the other dipole antenna 13 are provided in common. In other words, in the circle 31 that is the outer periphery of the printed circuit board 30, assuming that the 12 o'clock position of the timepiece is 0 degree, the four resonant elements 3 are formed at positions of 45 degrees, 135 degrees, 225 degrees, and 315 degrees, respectively. Has been. Even in this modified example, the same effect as the embodiment can be obtained.

  FIGS. 10A to 10C are diagrams showing still another modified example of this embodiment, and are compared with FIGS. 2A to 2C. 10A to 10C, in this modified example, square printed boards 35 and 36 are used instead of the circular printed boards 1 and 2. The feeding point P <b> 1 is provided at the center point of a square 37 that is the outer shape of the surface of the printed board 35. The four wirings 5 are formed so as to connect between the midpoints of the four sides of the square 37 and the feeding point P1. The four antenna elements 4 are respectively provided along the four sides of the square 37, and each antenna element 4 has a midpoint and one side end (right end as viewed from the feeding point P1) of the corresponding sides. It is formed between. Therefore, the antenna element 4 and the wiring 5 corresponding to the same side are formed in an L shape, and the four wirings 5 and the four antenna elements 4 are formed in an inverted bowl shape. The four stubs 6 are orthogonal to the four wires 5 respectively.

  The feeding point P <b> 2 is provided at the center point of the square 38 that is the outer shape of the surface of the printed circuit board 36. The four wirings 9 are formed so as to connect between the midpoints of the four sides of the square 38 and the feeding point P2. The four antenna elements 8 are respectively provided along the four sides of the square 38, and each antenna element 8 has a middle point and a second side end portion (left end portion when viewed from the feeding point P2) of the corresponding sides. It is formed between. Therefore, the antenna element 8 and the wiring 10 corresponding to the same side are formed in an L shape, and the four wirings 10 and the four antenna elements 8 are formed in a bowl shape. The four stubs 10 are orthogonal to the four wires 5, respectively.

  The squares 37 and 38 are arranged in parallel vertically. The antenna elements 4 and 8 corresponding to the same side as viewed from above constitute one dipole antenna 13. The four resonators 3 are arranged at the four corners of a square 39 located between the squares 37 and 38. Each resonator 3 is formed in an L shape. The resonant element 3 is provided in common to the antenna element 4 of one dipole antenna 13 and the antenna element 8 of the other dipole antenna 13 of two adjacent dipole antennas 13. Even in this modified example, the same effect as the embodiment can be obtained.

  FIGS. 11A to 11C are diagrams showing still another modified example of this embodiment, and are compared with FIGS. 2A to 2C. 11A to 11C, in this modification, regular octagonal printed circuit boards 40 and 41 are used instead of the circular printed circuit boards 1 and 2. The feeding point P <b> 1 is provided at the center point of the regular octagon 42 that is the outer shape of the surface of the printed circuit board 40. When the first corner of the regular octagon 42 is arranged at the 12 o'clock position of the watch, the four wires 5 are respectively connected to the first, third, fifth, and seventh corners of the regular octagon 42 and the feeding point P1. It is formed to connect them. The four antenna elements 4 are provided along the sides of the first, third, fifth, and seventh corners of the regular octagon 42 (right side as viewed from the feeding point P1). Therefore, the antenna element 4 and the wiring 5 corresponding to the same corner are formed in a V shape. The four stubs 6 are orthogonal to the four wires 5 respectively.

  The feeding point P <b> 2 is provided at the center point of the regular octagon 43 that is the outer shape of the surface of the printed circuit board 41. When the first corner of the regular octagon 43 is placed at the 12 o'clock position of the watch, the four wires 9 are respectively connected to the first, third, fifth, and seventh corners of the regular octagon 43 and the feeding point P2. It is formed to connect them. The four antenna elements 8 are provided along the sides on the other side (left side as viewed from the feeding point P2) of the first, third, fifth, and seventh corners of the regular octagon 43, respectively. Therefore, the antenna element 8 and the wiring 9 corresponding to the same corner are formed in a V shape. The four stubs 10 are orthogonal to the four wires 9, respectively.

  The regular octagons 42 and 43 are arranged vertically in parallel. The antenna elements 4 and 8 corresponding to the same corner as viewed from above constitute one dipole antenna 13. The four resonators 3 are arranged at the first, third, fifth, and seventh corners of the regular octagon 44 located between the regular octagons 42 and 43. Each resonator 3 is formed in a V shape. The resonant element 3 is disposed along the two antenna elements 4 and 8 of the corresponding dipole antenna 13. Even in this modified example, the same effect as the embodiment can be obtained.

  In the above modification, the four dipole antennas 13 are arranged in a square shape or a regular octagonal shape. However, the four dipole antennas 13 have a 12n or more 4n square shape (where n is an integer of 3 or more). You may arrange. Further, an even number of dipole antennas 13 larger than 4 may be arranged in a circular or polygonal shape.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the principal part of the antenna device by one Embodiment of this invention. It is a figure which shows the surface of the printed circuit board shown in FIG. 1, and a resonant element. It is a figure which shows the principal part and electric circuit part of the antenna apparatus shown in FIG. It is a figure which shows the frequency characteristic in the FM band of the gain of the antenna apparatus shown in FIG. 1, and VSWR. It is a figure which shows the frequency characteristic in the UHF band of the gain of the antenna apparatus shown in FIG. 1, and VSWR. It is a figure which shows the directivity of the antenna apparatus shown in FIG. It is a figure which illustrates the usage method of the antenna apparatus shown in FIG. It is a figure which shows the example of a change of this embodiment. It is a figure which shows the other example of a change of this embodiment. It is a figure which shows the further another example of a change of this embodiment. It is a figure which shows the further another example of a change of this embodiment.

Explanation of symbols

  1, 2, 35, 36, 40, 41 Printed circuit board, 1a, 2a Conductive layer, 3 Resonant element, 4, 8 Antenna element, 5, 9 Wiring, 6, 10 Stub, 7, 11, 31 yen, 13 Dipole antenna , 14 Coaxial line, 15 Capacitor, 16, 17 Coil, 20 Retransmission antenna, 21 Underground shopping area, 22 Receiving antenna, 23 Electrical / optical converter, 24 Optical fiber, 25 Optical / electrical converter, 26 Power amplifier, 30 Double-sided printing Substrate, 30a one side conductive layer, 30b other side conductive layer, 37-39 square, 42-44 regular octagon, P1, P2 feeding point.

Claims (6)

Comprising an alford loop antenna having a first resonant frequency;
The alhode loop antenna is
A plurality of dipole antennas arranged in a circular or polygonal shape, each having first and second antenna elements;
A first feeding point and a second feeding point provided at the center of the alhode loop antenna;
A first wiring connected between a base end of the first antenna element of each dipole antenna and the first feeding point;
A second wiring connected between the base end of the second antenna element of each dipole antenna and the second feeding point;
Further, a signal having a second resonance frequency that is connected between the tips of the adjacent first and second antenna elements, blocks the signal having the first resonance frequency, and is lower than the first resonance frequency. A coil that operates as a loading coil,
The coil, the first and second antenna elements connected via the coil, and the first and second wirings constitute a loop antenna having the second resonance frequency. , Antenna device.   Furthermore, it is provided along each of the said 1st and 2nd antenna element contained in each dipole antenna, The resonance element for extending the frequency band of the dipole antenna is provided, The Claim 1 characterized by the above-mentioned. The antenna device described. It has two substrates provided in parallel up and down,
The first antenna element, the first feeding point, and the first wiring are formed on one of the two substrates,
The second antenna element, the second feeding point, and the second wiring are formed on the other substrate,
The antenna device according to claim 2, wherein the resonant element is provided between the two substrates. With one substrate,
The first antenna element, the first feeding point, and the first wiring are formed on the surface of the substrate,
The second antenna element, the second feeding point, and the second wiring are formed on the back surface of the substrate,
The antenna device according to claim 2, wherein the resonant element is provided outside the first and second antenna elements. With one substrate,
The first antenna element, the first feeding point, and the first wiring are formed on the surface of the substrate,
The second antenna element, the second feeding point, and the second wiring are formed on the back surface of the substrate,
The antenna device according to claim 2, wherein the resonant element is provided inside the first and second antenna elements.   Further, each of the first and second stubs has a length of approximately a quarter wavelength of the signal of the first resonance frequency and is orthogonal to the first and second wirings, respectively. The antenna device according to any one of claims 1 to 5, wherein the antenna device is characterized.

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