JP4629159B1 - Phased array antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device that can receive terrestrial digital television broadcasting and is compact and does not need to adjust the direction of the antenna.
Since a first feeding point 40 and a second feeding point 41 and a third feeding point 42 are provided at an intermediate point therebetween, the first antenna structure 19 and the second antenna are provided for the third feeding point 42. The structure 23, the third antenna structure 27, and the fourth antenna structure 31 are electrically equidistant, and the antenna configuration of these pairs with respect to the first feeding point 40 and the second feeding point 41 The body has a phase difference of 24 to 1/4 of the wavelength. Therefore, when a feeding cable is connected to either the first feeding point 40 or the second feeding point 41, the phased array antenna apparatus 10 is moved within a range of + −10 degrees or more and 90 degrees or less with respect to the arrival direction of the received radio wave. Since it becomes equal to rotating, it is not necessary to adjust the direction at the time of installation by selectively connecting the feeding cable to the three feeding points.
[Selection] Figure 1

Description

  The present invention relates to a phased array antenna apparatus, and more particularly to a phased array antenna apparatus capable of receiving terrestrial digital television broadcasting.

  Yagi antennas that are widely used for receiving terrestrial analog television broadcasts can be used as antennas for receiving terrestrial digital television broadcasts, also called terrestrial digital television broadcasts. Since the elements are large and installation requires labor, antennas that are compact and easier to install have been proposed.

  For example, Japanese Patent Laid-Open No. 2005-260898 discloses an antenna obtained by improving a Swiss quad type antenna used by an amateur radio operator for a mobile station or the like into a structure suitable for television broadcasting by a terrestrial digital system. Swiss quad antennas have the advantage of being more compact and easier to install than Yagi antennas.

  However, it is necessary to adjust the direction of the antenna in consideration of the direction in which the radio wave arrives and the directivity of the antenna even in the Swiss quad type antenna, which is almost the same work load as the Yagi antenna. Moreover, since it is necessary to work on a roof in the case of a private house etc., there also exists a problem that the danger at the time of work is not reduced. Furthermore, when the direction of the antenna changes due to a typhoon or the like, there is no difference from the Yagi antenna in that it needs to be adjusted again. Moreover, it is a size that cannot be said to be compact enough to be installed indoors, and cannot be said to be suitable for indoor installation.

JP-A-2005-260898

  In order to solve the above-described problems, an object of the present invention is to provide an antenna device that can receive terrestrial digital television broadcasting and is compact and does not require adjustment of the antenna direction.

  The invention according to claim 1 is provided on the first surface of the substrate formed in a predetermined length with respect to the horizontal direction and the vertical direction, and provided on the first surface of the substrate, and perpendicular to the horizontal direction from the first base point. A first horizontal element and a first vertical element each extending in a direction and formed to have a length of about a quarter of the wavelength at the center frequency of the reception frequency band. And a second antenna formed on the first surface of the substrate and spaced apart from the first base point by a distance corresponding to a quarter of the wavelength at the center frequency of the reception frequency band in the horizontal direction. Extending from the base point of the first horizontal element so as to face the first horizontal element and having a length of about a quarter of the wavelength at the center frequency of the reception frequency band. 2 horizontal elements and the substrate While being formed on the first surface, said second vertical direction from a base point, and extends in the second same direction and the vertical element, and, about a wavelength at the center frequency of the reception frequency band A second antenna structure having a second vertical element formed to a quarter length, the first base point and a first conductive line disposed in the vicinity of the second base point; A second conductive wire provided to connect the first base point portion of the first antenna structure and the first end of the first conductive wire; and the second antenna. A third base formed to connect the portion of the second base point of the structure and the second end of the first conductive line, and formed to the same length as the second conductive line; A conductive line and a conductive line formed on the first conductive line, respectively, along the first conductive line. A first feeding point and a second feeding point that are arranged such that the distance is not less than one-fourth of the wavelength at the center frequency of the reception frequency band and not more than one-fourth of the wavelength; And a third feed point formed at an intermediate point between the first feed point and the second feed point at a distance along the first conductive line. This is a featured phased array antenna device.

  The invention according to claim 2, in the invention described in claim 1, while being formed on the first surface of the substrate, the wavelength at the center frequency of the frequency band used in the vertically downward from the first base point About a quarter of the wavelength at the center frequency of the used frequency band, extending in the horizontal direction from the third base point separated by a distance equivalent to a quarter of the first horizontal element and in the same direction as the first horizontal element. A third horizontal element having a length of 1 and a first horizontal element formed on the first surface of the substrate, vertically from the third base point, and back to the first vertical element. extends so as to direction, and a third antenna structure having a third vertical element, which is formed to a length of about a quarter of the wavelength at the center frequency of the operating frequency band, said substrate And the second surface of the second surface. Extending vertically downward from a base point in a horizontal direction from a fourth base point separated by a distance corresponding to a quarter of the wavelength at the center frequency of the used frequency band, and extending in the same direction as the second horizontal element; the fourth horizontal elements formed to a length of about one quarter of a wavelength at the center frequency of the usable frequency band, while being formed on the first surface of the substrate, from the third base point vertically, and the second extending to facing away vertical element, and a fourth vertical formed to a length of about a quarter of the wavelength at the center frequency of the usable frequency band the provided so as to connect the fourth antenna structure having an element, and a first end of said third of said third base portion of the antenna structure first conductive line 4 conductive wires and the fourth antenna structure And a fifth conductive line that is formed to connect the portion of the base point of 4 and the second end of the first conductive line, and has the same length as the fourth conductive line. This is a phased array antenna device.

  According to a third aspect of the present invention, in the second aspect of the present invention, the first base point, the second base point, the third base point, and the second base point are formed on the second surface of the substrate. A phased array further comprising a ground plane having the same shape and the same size as the virtual quadrangle at a portion corresponding to the virtual quadrangle having the fourth base point as a vertex. It is an antenna device.

  According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the case containing the substrate and the case are provided respectively, and the first feeding point and the second feeding point are provided. And a first power supply connector, a second connector and a third connector connected to the point and the third power supply point, respectively, and a fixing tool which is provided and can be fixed to a building structure. Is a phased array antenna device.

  The invention according to claim 5 is the invention according to claim 4, wherein the fixture is interposed between the case and the building structure, and the first power supply connector, the second connector, and The third connector is a phased array antenna device, wherein the third connector is provided on a surface of the case facing the building structure.

  The invention according to claim 6 is the invention according to any one of claims 2 to 5, wherein the first conductive line, the second conductive line, the third conductive line, the fourth conductive line. A phased array antenna device characterized in that at least one of the conductive wires and the fifth conductive wire is covered with a radio wave shield material.

  According to invention of Claim 1, it arrange | positions so that a mutual distance may become 1/24 or more and the length of 1/4 or less of the wavelength in the center frequency of a receiving frequency band on the 1st conductive wire. Since the third feeding point is provided at the intermediate point between the first feeding point and the second feeding point, the first antenna structure and the second feeding point are provided for the third feeding point. become electrically equidistant from the antenna structure, a first feeding point for the second feeding point of a quarter wavelength to a first antenna structure and the second antenna structure 1 Minute phase difference. Therefore, when a feeding cable is connected to either the first feeding point or the second feeding point, the wavelength relative to the radio wave received by either the first antenna component or the second antenna component The arrangement is close to or far from one-quarter of the distance. This is equivalent to rotating the phased array antenna device within a range of plus or minus 10 degrees or more and 90 degrees or less with respect to the arrival direction of the received radio wave. Therefore, by selectively connecting the feeding cables to the three feeding points, it is not necessary to adjust the orientation of the phased array antenna device when it is installed.

  According to the invention described in claim 2, placing a third antenna structure and the fourth antenna structure so as not to interfere with signal reception of the first antenna structure and a second antenna structure Can do. Further, since the arrangement of the conductive lines is relatively simple, the phased array antenna device can be easily manufactured.

  According to the third aspect of the present invention, the largest area of the ground plane can be secured in a range that does not affect the reception of radio waves of each antenna component.

  According to invention of Claim 4, it becomes easy to install a phased array antenna apparatus on the wall surface etc. of building structures, such as a building and a house.

  According to the invention described in claim 5, since the connector is located between the case and the building structure, it is possible to prevent the connector from being destroyed due to the object flying on the strong wind colliding with the connector. it can. In addition, it is possible to reduce the intrusion of rainwater into the connector due to strong rain hitting from the horizontal or near horizontal direction during strong winds.

  According to the invention described in claim 6, since at least one of the five conductive wires is covered with the radio wave shielding material, these conductive wires exhibit an effect that is not assumed in design as part of the antenna element. And the characteristics of the phased array antenna device can be improved.

The phased array antenna apparatus which concerns on 1st Embodiment is shown, (A) is a front view, (B) is a top view, (C) is a right view. It is a front view which shows the relationship with the wavelength in the center frequency of the receiving frequency band of the phased array antenna apparatus which concerns on 1st Embodiment. It is a rear view of the phased array antenna apparatus which concerns on 1st Embodiment. The case of a phased array antenna apparatus is shown, (A) is a front view, and (B) is a left side view. It is explanatory drawing which shows the principle of the directivity of a phased array antenna apparatus. It is explanatory drawing which shows the phase difference between an electromagnetic wave arrival angle and an antenna structure. It is a perspective view which shows the installation state of the phased array antenna apparatus which concerns on 1st Embodiment. It is a figure which shows the modification of a case, (A) is a rear view, (B) is a left view. Shows the phased array antenna apparatus according to the second embodiment, a (A) is a front view, (B) is a plan view, (C) is a right side view, (D) is a rear view.

  Hereinafter, a phased array antenna device according to a first embodiment of the present invention will be described in detail with reference to the drawings. In the first embodiment and the second embodiment, as an example, an antenna device premised on the reception of television broadcasting by the terrestrial digital method is shown. However, the present invention is not limited to other methods, for example. It can also be used for various communications that require directional antennas, such as television broadcasting and amateur radio using ultra-short waves. In the following description, the description will be made on the premise that the feeding cable is selectively connected to the feeding point having the best reception state among the three feeding points. However, in the present invention, the radio wave received by the multipath is used. It is also possible to connect a device having a receiving circuit corresponding to combining diversity, that is, to use three feeding points in combination.

  1A and 1B show a phased array antenna device according to a first embodiment, where FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a right side view. In FIG. 1, 10 is a phased array antenna device, 11 is a substrate, 12 is a front surface, 13 is a back surface, 14 is an upper end surface, 15 is a lower end surface, 19 is a first antenna structure, 20 is a first base point, and 21 is a first base point. 1 horizontal element, the first vertical element 22, the second antenna structure 23, 24 second base point 25 is second horizontal element, the 26 second vertical element, the third antenna structure 27, 28 second 3 reference points, 29 is a third horizontal element, 30 is a third vertical element, 31 is a fourth antenna structure, 32 is a fourth reference point, 33 is a fourth horizontal element, 34 is a fourth vertical element, and 35 is a first conductive element. 36, the second conductive line, 37 the third conductive line, 38 the fourth conductive line, 39 the fifth conductive line, 40 the first feeding point, 41 the second feeding point, and 42 the third feeding point. It is. FIG. 2 is a front view showing the relationship with the wavelength at the center frequency of the reception frequency band of the phased array antenna apparatus according to the first embodiment. The reference numerals used in FIG. 2 are the same as those in FIG.

  As shown in FIG. 1, a phased array antenna apparatus 10 according to this embodiment is provided with an element such as an element on a substrate 11. The substrate 11 is a substantially square glass epoxy substrate, and most of what constitutes an antenna is provided on the surface 12 side. The substrate 11 may be made of another material such as a bakelite substrate or a glass substrate as long as it is a rigid substrate. Moreover, when using only indoors, a flexible substrate, such as a polyimide, can also be used. Further, in FIG. 1, in order to reduce the size of the phased array antenna apparatus 10, the substrate 11 has a substantially square plate shape having a necessary minimum area. You may form in other shapes, such as a hexagon and a circle, for the purpose of decorating a thing.

  In addition, the phased array antenna device 10 of this embodiment is configured to transmit radio waves in the four antenna components, ie, the first antenna component 19, the second antenna component 23, the third antenna component 27, and the fourth antenna component 31. Receive. These antenna structures are obtained by forming a metal thin film such as a copper alloy or an aluminum alloy by printing in the same manner as a wiring pattern in a circuit. Moreover, although each has an independent receiving function, since the feeding point is common, it functions as one antenna device as a whole. Note that these antenna components and conductive wires described later may be formed on the substrate 11 by electroless plating or by vapor deposition. Alternatively, the metal foil may be formed by adhering to the substrate 11. Further, like a bus bar used for an electrical component of an automobile or a motorcycle, a metal plate may be pressed to form an antenna structure and a conductive wire pattern and fixed to the substrate 11 with screws or the like. it can. Further, it is desirable that these antenna components are covered with resin or the like except for the first feeding point 40, the second feeding point 41, and the third feeding point 42 for protection.

  As shown in FIG. 1, the first antenna structure 19 includes a first horizontal element 21 extending in the horizontal left direction starting from the first base point 20 and a vertically upward direction starting from the first base point 20. And a first vertical element 22. The second antenna structure 23 includes a second horizontal element 25 extending in the horizontal right direction starting from the second base point 24, and a second vertical element 26 extending vertically upward starting from the second base point 24. And. Further, the third antenna component 27 includes a third horizontal element 29 extending leftward from the third base point 28 and a third vertical element 30 extending vertically downward from the third base point 28. And. In addition, the fourth antenna component 31 includes a fourth horizontal element 33 extending in the horizontal right direction starting from the fourth base point 32, and a fourth vertical element extending in the vertical downward direction starting from the fourth base point 32. 34. First horizontal element 21, the second horizontal element 25, the third horizontal element 29 and the fourth horizontal element 33 is an element corresponding to the horizontal polarized wave, the first vertical element 22, a second vertical element 26, a third vertical element 30 and the fourth vertical element 34 are elements corresponding to vertical polarization.

  In addition, as shown in FIG. 2, these horizontal and vertical elements are long from the base point to the tip when the wavelength at the center frequency of the reception frequency band of television broadcasting by the terrestrial digital system is λ. Is formed to have a length of λ / 4. Further, it is radially symmetric so as to be point-symmetric about the third feeding point 42, that is, from the first base point 20, the second base point 24, the third base point 28, and the fourth base point 32 toward the third feeding point 42. Is formed. Also, the first horizontal element 21 and the third horizontal element 29, the second horizontal element 25 and the fourth horizontal element 33, the first vertical element 22 and the second vertical element 26, the third vertical element 30 and the fourth horizontal element which are parallel to each other. The vertical elements 34 are arranged at intervals of λ / 4. Accordingly, the four base points are arranged at an interval of λ / 4.

  Further, as shown in FIG. 1, the first conductive line is such that both ends are located at an intermediate point between the first base point 20 and the third base point 28 and an intermediate point between the second base point 24 and the fourth base point 32. 35 is arranged. In addition, a second conductive line 36 connecting the first base point 2 and the left end portion of the first conductive line 35, a third conductive line 37 connecting the second base point 24 and the right end portion of the first conductive line 35, A fourth conductive line 38 connecting the three base points 28 and the left end portion of the first conductive line 35 and a fifth conductive line 39 connecting the fourth base point 32 and the right end portion of the first conductive line 35 are provided. . Further, a first feeding point 40 is provided near the left end of the first conductive line 35, a second feeding point 41 is provided near the right end, and a third feeding point is provided at an intermediate point between the first conductive line 35 and the second feeding point 41. 42 is provided. Further, the surfaces of the first conductive line 35, the second conductive line 36, the third base point 28, the fourth conductive line 38, and the fifth conductive line 39 are along the contours except for the three feeding points. A shaped electromagnetic shielding sheet is attached. This is provided to reduce this effect because these conductive wires act as reflective elements to lower the gain of the antenna structure. In addition, although it is preferable to affix an electromagnetic wave shield sheet to all these conductive wires, even if it affixes on one part, it is possible to reduce. Further, forming a conductive line on the surface of the substrate 11, further Instead of pasting the electromagnetic wave shielding sheet on the surface thereof, may be used coaxial cable or other electromagnetic shielding cable. Note that, regardless of which cable is used, it is necessary to provide three feeding points.

  As described above, the distance between the first base point 20 and the third base point 28 is λ / 4, and the distance between the second base point 24 and the fourth base point 32 is also λ / 4. The total length of the second conductive line 36 and the fourth conductive line 38 and the total length of the third conductive line 37 and the fifth conductive line 39 are λ / 4. Further, as shown in FIG. 2, in this embodiment, the length of the first conductive line 35 is formed to be slightly shorter than λ / 4. Therefore, the distance between the first feeding point 40 and the third feeding point 42 and the distance between the second feeding point 41 and the third feeding point 42 are slightly shorter than the length of λ / 8, respectively. Therefore, the electrical distance between the first base point 20 and the third base point 28 and the third feed point 42, that is, the distance along each conductive line, and the second base point 24, the fourth base point 32, and the third feed point 42 It is equal to the electrical distance. On the other hand, the electrical distance between the first base point 20 and the third base point 28 and the first feeding point 40 and the electrical distance between the second base point 24 and the fourth base point 32 and the first feeding point 40 are the first base point. 20 and the third base point 28 and the first feeding point 40 are slightly shorter than λ / 4. Similarly, the electrical distance between the first base point 20 and the third base point 28 and the second feed point 41 and the electrical distance between the second base point 24 and the fourth base point 32 and the second feed point 41 are the second The electrical distance between the base point 24 and the fourth base point 32 and the second feeding point 41 is slightly shorter than λ / 4.

となる。そこで、伝搬差ΔｌからアンテナＴ１とアンテナＴ２間の電波の位相差ΔΦを求めると、

となる。したがって、数式１及び数式２から、

となる。 Here, the reason why a difference in electrical distance slightly shorter than λ / 4 is provided between the first feeding point 40 and the second feeding point 41 will be described. FIG. 5 is an explanatory diagram showing the principle of directivity of the phased array antenna device. FIG. 6 is an explanatory diagram showing a radio wave arrival angle and a phase difference between antenna components. When the substrate 11 is facing the radio wave arrival surface of the radio wave received, the radio wave reaches each element at the same time, so there is no phase difference between the radio waves in each element. When the board 11 does not face the radio wave arrival surface of the radio wave received, as shown in FIG. 5, the radio wave that arrives from the direction of the radio wave arrival angle θ first arrives at the antenna T1 and passes through the propagation difference Δl. After that, it arrives at the antenna T2 with a delay by the difference in spatial distance. As can be seen from FIG.

It becomes. Therefore, when the phase difference ΔΦ of the radio wave between the antenna T1 and the antenna T2 is obtained from the propagation difference Δl,

It becomes. Therefore, from Equation 1 and Equation 2,

It becomes.

で表すことができる。なお、以上の説明は、基板１１の表面１２側における電波到来方向に関する説明であるが、裏面１３側から到来する電波についても同様のことが言える。 Therefore, the relationship between the radio wave arrival angle θ and the phase difference ΔΦ is

Can be expressed as Although the above description is about the arrival direction of the radio wave on the front surface 12 side of the substrate 11, the same can be said for the radio wave coming from the back surface 13 side.

  FIG. 6 summarizes the results of calculating specific radio wave arrival angles from Equation 4. For example, when the distance d between the antenna T1 and the antenna T2 is λ / 4 and the phase difference ΔΦ is λ / 4, the radio wave arrival angle θ is 90 degrees, that is, comes from the side of the substrate 11. When the distance d between the antenna T1 and the antenna T2 is λ / 4 and the phase difference ΔΦ is λ / 5.625, the radio wave arrival angle θ is 45 degrees (obliquely forward). Further, when the distance d between the antenna T1 and the antenna T2 is λ / 4 and the phase difference ΔΦ is λ / 24, the radio wave arrival angle θ is 10 degrees (obliquely forward).

  As described above, the distance between the first base point 20 and the third base point 28 and the distance between the second base point 24 and the fourth base point 32 are each λ / 4. Further, the first feeding point 40 and the second feeding point 41 are an electrical distance slightly shorter than λ / 4 with respect to the first and second base points 20 and 28 and the second and fourth base points 24 and 32. Is set. Therefore, when the radio wave arrival angle θ is plus or minus 90 degrees or when the radio wave arrives from an obliquely forward direction, the first feed point 40 and the second feed point 41 are arranged in the installation direction of the substrate 11. By connecting the feeding cable to a direction that generates a phase difference on the first conductive wire 35 that cancels the phase difference caused by the phase difference, the phase difference between the antenna components is 0 or less when guided to the feeding cable. Get closer. Therefore, in such a configuration, the substrate 11 is rotated with respect to a television receiver or the like connected to the phased array antenna device 10 so as to face the radio wave arrival surface, or on the radio wave arrival surface. It can be said that it is substantially creating a state close to facing each other. It should be noted that when the substrate 11 is actually facing the radio wave arrival surface or in a state close to facing the radio wave arrival surface, a power feeding cable may be connected to the third feeding point 42.

  The present inventor who has obtained the above findings conducted the following experiment in order to actually confirm the above-described calculation results. That is, the distance d between the antenna T1 and the antenna T2 is fixed at λ / 4, and the n at the distance λ / n between the first base point and the second base point is increased by 1 from 4 to 28 and adjusted in a range of 25 steps. Then, the image quality in the television receiver was subjectively evaluated. As a result, it was found that there is no difference in image quality that can be visually recognized in the range of λ / 24 to λ / 28. As shown in FIG. 6, when the distance between the first base point and the second base point is λ / 24 or less, the radio wave arrival angle θ is plus or minus 10 degrees or less, and the direction facing the front or back surface of the substrate It is presumed that there is not much difference between the radio wave arrival direction and the radio wave arrival direction. Therefore, it can be said that the distance between the first base point and the second base point is preferably in the range of λ / 24 to λ / 4. In addition, if λ / 5.625 or the vicinity thereof, the effect is further exhibited. If these are λ / 5.625 or in the vicinity thereof, the radio wave arrival angle θ is substantially plus or minus 45 degrees, and the entire range of the radio wave arrival angles, that is, 180 degrees by 45 degrees at three feeding points, etc. This is due to the fact that it becomes equal to the division, and it can be said that it is more preferable in practice. If the distance d between the antenna T1 and the antenna T2 is set to λ / 4 and more feeding points such as five or seven feeding points are provided, the radio wave arrival angle θ with respect to the substrate 11 is further reduced to zero. Although it can be brought closer, it is possible to provide an antenna device that has no practical problem even if only three feeding points are provided. Further, even if the first feeding point 40 and the second feeding point 41 are arranged at λ / 2, the same function and effect can be obtained theoretically with respect to the reception of radio waves, but the size of the substrate 10 is both vertical and horizontal. Since it becomes larger than λ / 4, it is not a preferable configuration in view of the problem of the present invention.

  FIG. 3 is a rear view of the phased array antenna apparatus according to the first embodiment. 3, 43 is a ground plane, 44 is a first ground connection line, 45 is a second ground connection line, 46 is a third ground connection line, and the other symbols are the same as those in FIG. The phased array antenna device 10 is an antenna device provided with a ground plane, and a ground plane 43 is provided at the center of the back surface 13 of the substrate 11 as shown in FIG. The ground plane 43 has a virtual quadrangular shape at a portion on the back surface 13 side corresponding to a virtual quadrangle having the first base point 20, the second base point 24, the third base point 28, and the fourth base point 32 as vertices. And the same size. The size and shape of the first antenna structure 19, the second antenna structure 23, the third antenna structure 27, and the fourth antenna structure so as not to interfere with reception by reflecting radio waves coming from the back surface 13 side. This is due to the result of considering securing the area of the ground plane 43 as much as possible within a range that does not affect each element 33 of the body 31. The first ground connection line 44, the second ground connection line 45, and the third ground connection line 46 are connected to the ground plane 43 and penetrate the substrate 11 to pass through the first feeding point 40 and the second feeding point. 41 and the third feeding point 42, respectively.

  Next, the case of the phased array antenna device will be described. FIG. 4 shows a case of a phased array antenna device, where (A) is a front view and (B) is a left side view. 4, 47 cases, 48, 49, 50 and 51 are fixtures, 52, 53 and 54 are coaxial cable, 55 the first connector, the 56 second connector, 57 a third connector, other Reference numerals are the same as those in FIG. The case 47 has an internal space suitable for housing the substrate 11, and is installed in the building structure by fixtures 48, 49, 50 and 51 provided in the vicinity of the four corners. Further, in order to ensure electrical connection from the outside of the case 47 to the first feeding point 40, the second feeding point 41, and the third feeding point 42, a first connector 55, a second connector 56, and A third connector 57 is provided, and these connectors and three feeding points are connected by coaxial cables 52, 53 and 54.

  Furthermore, a case installation example will be described. FIG. 7 is a perspective view showing an installation state of the phased array antenna device according to the first embodiment. In FIG. 7, 58, 59, 60 and 61 are bolts, 65 is a building structure, 66 is a parapet, 67 is a headboard, and other symbols are the same as those in FIG. In the example of FIG. 7, the case 47 is fixed on the outer peripheral side of the parapet 66 of the building structure 65 near the headboard 67, that is, near the highest part of the wall surface of the building structure 65. And 51 are fixed by bolts 58, 59, 60 and 61. Depending on the direction in which the received radio wave arrives, it may be installed on the inner peripheral side of the parapet 66. Further, in a general house or the like that does not have a parapet, it may be fixed to the wall surface on the side where the received radio wave arrives. Furthermore, can be installed in a wall of the garage, further structures other than walls, for example 搭屋 structural materials and of the supporting leg of the feed water tank may be installed in signboard frame. In addition, since the same effect as adjusting the direction of the board | substrate 11 is acquired by connecting a power feeding cable to either of three power feeding points as mentioned above, the direction of the wall surface etc. to install is not ask | required.

  Next, a modified example of the case will be described. FIG. 8 is a view showing a modification of the case, where (A) is a rear view and (B) is a left side view. In FIG. 8, 62 is a first connector, 63 is a second connector, 64 is a third connector, and other reference numerals are the same as those in FIG. The connector to be attached to the case can be provided at any of the top, bottom, left and right end faces of the case, or the front and plane positions. The case 47 shown in FIG. 8 is an example, and the first connector 62, the second connector 63, and the third connector 64 are provided on the back surface 13 side of the substrate 11, that is, the back surface side of the case. Therefore, when the case 47 shown in FIG. 8 is installed on a wall surface or the like, the first connector 62, the second connector 63, and the third connector 64 are located between the case 47 and the building structure. . If comprised in this way, like the case 47 shown in FIG. 7, a connector will be destroyed, for example, when the thing which flew on strong wind or the rooftop structure etc. which deform | transformed by strong wind collide with a connector. There is almost no. Further, in the case 47 shown in FIG. 7, rain is likely to enter the connector when the strong rain hits from the horizontal or near horizontal direction in a strong wind. However, in the case 47 shown in FIG. It becomes possible to reduce.

  The phased array antenna device 10 can also be installed indoors. In that case, a case with a strong structure like the case 47 is not provided, but it is housed in a light and simple case, or a latch that can be hung without a case is attached and suspended on a so-called pulling rod. It can also be lowered. Or it is also possible to install by means of providing openings at a plurality of locations on the substrate 11 and attaching them to the partition wall with pins, or supporting the upper end surface 14 and the lower end surface 15 of the substrate 11 with brackets. Or you may form the board | substrate 11 with a flexible material and affix on a partition wall or a window glass with an adhesive tape. Furthermore, you may attach to the back side of a large picture frame, a wall-mounted television, and various furniture. After all, the phased array antenna device 10 is thin and has a configuration that does not require adjustment of the direction at the time of installation. It can be installed in various places indoors and outdoors.

  Furthermore, a phased array antenna device according to a second embodiment of the present invention will be described. 9A and 9B show a phased array antenna device according to the second embodiment, where FIG. 9A is a front view, FIG. 9B is a plan view, FIG. 9C is a right side view, and FIG. In FIG. 9, 16 is a substrate, 17 is a front surface, 18 is a back surface, 68 is a ground plane, and other reference numerals are the same as those in FIGS. In the following description, the description of the same configuration as that of the phased array antenna device according to the first embodiment is omitted.

  The phased array antenna device 10 according to this embodiment includes the third antenna configuration body 27, the fourth antenna configuration body 31, the fourth conductive line 38, and the fifth conductive line from the phased array antenna device 10 according to the first embodiment. 39 is excluded, and the substrate 16 has a horizontally long rectangular plate shape corresponding thereto. Since the phased array antenna device 10 of this embodiment has two antenna components, the gain as the antenna device is lower than that of the phased array antenna device 10 according to the first embodiment, but is necessary for installation. This is particularly suitable when installed indoors because the required area is greatly reduced. In addition, there is an advantage that it can be completely hidden on the back side of a large frame, a wall-mounted TV, a small furniture, or the like.

  In FIG. 9, the phased array antenna device 10 includes the first antenna structure 19 and the second antenna structure 23, but the substrate 16 has a vertically long rectangular plate shape, and the first antenna structure 19 The third antenna configuration body 27 may be used. Further, the first conductive wire 35 is disposed on the edge of the substrate 16 and the substrate 16 is inserted into a connector having a structure such as a flat cable connector, whereby the first feeding point 40, the second feeding point 41, and the third feeding point 42. It may be possible to ensure the connection between the power supply cable and any of the above.

  As described above, the phased array antenna apparatus 10 according to the first and second embodiments has the first feeding point 40 and the second feeding point 41 on the first conductive wire 35 and the intermediate points between them. 3 since the feeding point 42 is provided, for the third feeding point 42 further first in first antenna structure 19 and becomes electrically equidistant from the second antenna structure 23 (first embodiment The third antenna structure 27 and the fourth antenna structure 31 are also electrically equidistant), and the first antenna structure 19 and the second antenna structure with respect to the first feeding point 40 and the second feeding point 41. And a phase difference of 1/24 to 1/4 of the wavelength. Therefore, when a feeding cable is connected to either the first feeding point 40 or the second feeding point 41, the wavelength relative to the radio wave received by either the first antenna component 19 or the second antenna component 23 The arrangement is close to or far from the equivalent of 1 / 24th to 1 / 4th or less. This is equivalent to rotating the phased array antenna apparatus 10 in a range of plus / minus 10 degrees or more and 90 degrees or less with respect to the arrival direction of the received radio wave. Therefore, by selectively connecting the feeding cables to the three feeding points, it is not necessary to adjust the orientation when the phased array antenna apparatus 10 is installed.

  As mentioned above, although two embodiment of this invention was described, this invention is not limited to embodiment mentioned above, A various deformation | transformation and application are possible within the range which does not deviate from the summary of this invention. is there. For example, the material of each component can be changed to a material other than those described as long as there is no unfavorable influence on the performance of each component. Further, the shape and structure of the case can be appropriately changed within a range in which the substrate 11 is housed and held and the power supply cable can be connected to the three power supply points. Further, when the phased array antenna device is installed indoors, a frame for holding the substrate can be provided instead of the case. Further, the various modifications described in the modified examples and the description of the two embodiments can be combined as appropriate without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Phased array antenna apparatus 11 Board | substrate 12 Front surface 13 Back surface 14 Upper end surface 15 Lower end surface 16 Substrate 17 Front surface 18 Back surface 19 1st antenna structure 20 1st reference point 21 1st horizontal element 22 1st vertical element 23 2nd antenna structure 24 Second reference point 25 Second horizontal element 26 Second vertical element 27 Third antenna component 28 Third reference point 29 Third horizontal element 30 Third vertical element 31 Fourth antenna component 32 Fourth reference point 33 Fourth horizontal element 34 4 vertical element 35 1st conductive line 36 2nd conductive line 37 3rd conductive line 38 4th conductive line 39 5th conductive line 40 1st feeding point 41 2nd feeding point 42 3rd feeding point 43 ground plane 44 1st ground Connection line 45 Second ground connection line 46 Third ground connection line 47 Case 48 Fixing tool 49 Fixing tool 50 fixing tool 51 fixing tool 52 coaxial cable 53 coaxial cable 54 coaxial cable 55 first connector 56 second connector 57 third connector 58 bolt 59 bolt 60 bolt 61 bolt 62 first connector 63 second connector 64 third connector 65 building structure Object 66 Parapet 67 Kasagi 68 Ground Plane

Claims (6)

A substrate formed with a predetermined length in each of the horizontal direction and the vertical direction;
It is provided on the first surface of the substrate, extends from the first base point toward the horizontal direction and the vertical direction, and has a length of about a quarter of the wavelength at the center frequency of the reception frequency band. A first antenna arrangement comprising a first horizontal element and a first vertical element respectively formed thereon;
Formed on the first surface of the substrate and horizontally from a second base point spaced from the first base point in a horizontal direction by a distance corresponding to a quarter of a wavelength at a center frequency of the reception frequency band. And a second horizontal element that extends away from the first horizontal element and that is formed to have a length of about one quarter of the wavelength at the center frequency of the reception frequency band; Formed on the first surface of the substrate, extending in a vertical direction from the second base point and in the same direction as the second vertical element, and at a center frequency of the reception frequency band A second antenna arrangement comprising a second vertical element formed to a length of about one quarter of the wavelength;
A first conductive line disposed in the vicinity of the first base point and the second base point;
A second conductive line provided to connect the portion of the first base point of the first antenna structure and the first end of the first conductive line;
Provided to connect the second base point portion of the second antenna structure and the second end of the first conductive line, and formed to have the same length as the second conductive line A third conductive line formed;
Each of the first conductive lines is formed on the first conductive line, and the distance along the first conductive line is not less than one-fourth of the wavelength at the center frequency of the reception frequency band and not more than one-fourth of the length. A first feeding point and a second feeding point respectively arranged so as to be
A third feed point formed on the first conductive line and formed at an intermediate point between the first feed point and the second feed point at a distance along the first conductive line. A phased array antenna device comprising: Formed on the first surface of the substrate, and horizontally from a third base point vertically spaced from the first base point by a distance corresponding to a quarter of the wavelength at the center frequency of the used frequency band. A third horizontal element extending in the same direction as the first horizontal element and having a length of about a quarter of the wavelength at the center frequency of the used frequency band; and the substrate. And extending from the third base point in a vertical direction and facing away from the first vertical element, and at a center frequency of the use frequency band. A third antenna arrangement comprising a third vertical element formed to a length of about one quarter of the wavelength;
A horizontal direction from a fourth base point formed on the first surface of the substrate and vertically separated from the second base point by a distance corresponding to a quarter of the wavelength at the center frequency of the used frequency band. And a fourth horizontal element extending in the same direction as the second horizontal element and having a length of about a quarter of the wavelength at the center frequency of the used frequency band, and the substrate And extending from the third base point in the vertical direction and facing away from the second vertical element, and at the center frequency of the used frequency band A fourth antenna arrangement comprising a fourth vertical element formed to a length of about one quarter of the wavelength;
A fourth conductive line provided to connect the portion of the third base point of the third antenna structure and the first end of the first conductive line;
The fourth antenna component is provided so as to connect the portion of the fourth base point and the second end of the first conductive line, and has the same length as the fourth conductive line. The phased array antenna device according to claim 1, further comprising a fifth conductive line.   A portion formed on the second surface of the substrate and corresponding to a virtual quadrangle having the first base point, the second base point, the third base point, and the fourth base point as vertices; 3. The phased array antenna device according to claim 2, further comprising a ground plane having the same shape as the virtual quadrangle and the same size. A case containing the substrate;
A first feeding connector, a second connector, and a third connector that are respectively provided in the case and connected to the first feeding point, the second feeding point, and the third feeding point;
The phased array antenna device according to claim 2, further comprising a fixture that is provided and can be fixed to a building structure. The fixture is interposed between the case and the building structure;
5. The phased according to claim 4, wherein the first power supply connector, the second connector, and the third connector are provided on a surface of the case facing the building structure. 6. Array antenna device.   At least one of the first conductive line, the second conductive line, the third conductive line, the fourth conductive line, and the fifth conductive line is covered with a radio wave shielding material. The phased array antenna device according to any one of claims 2 to 5, characterized by:

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