JP6097149B2 - Dual-polarization Yagi antenna - Google Patents

Description

  The present invention relates to a dual-polarization Yagi antenna that can be easily disassembled and assembled to obtain good cross polarization discrimination.

  Yagi antenna has been known as a directional antenna for use in the VHF band or higher. Yagi antenna is either vertically polarized wave or horizontally polarized wave according to communication system specifications and infrastructure communication specifications. In order to cope with this, the elements are installed so as to be vertical or horizontal with respect to the ground. In this case, the mode in which elements are arranged in the vertical direction with respect to the ground corresponds to vertical polarization, and the mode in which elements are arranged in parallel to the ground corresponds to horizontal polarization. In the communication and broadcasting business fields, communication forms that use separate frequency bands for vertical polarization and horizontal polarization, and spatial multiplexing communication that uses both vertical and horizontal polarization Has been proposed. In this case, it is preferable to use a dual-polarization Yagi antenna that can support vertical polarization and horizontal polarization with a single antenna device.

FIG. 18 is a perspective view showing an example of the configuration of a conventional dual-polarization Yagi antenna.
A conventional dual-polarization Yagi antenna 101 shown in this figure includes a straight metal arm 118 having a circular cross section and a plurality of linear horizontal polarization side waveguide elements 111 arranged in a horizontal plane. A linear horizontal polarization-side radiation element 110 and a linear horizontal polarization-side reflection element 112, a plurality of linear vertical polarization-side waveguide elements 115 arranged in a vertical plane, and a linear shape The vertical polarization side radiation element 114 and the straight vertical polarization side reflection element 116 are configured. The arm 118 is divided into a first arm 118a at the front and a second arm 118b at the rear, and a shield cylinder 119 is disposed therebetween. A plurality of horizontally polarized wave side waveguide elements 111 and vertically polarized wave side waveguide elements 115 are arranged in order substantially orthogonal to the first arm 118a from the front side of the first arm 118a. Next, the horizontal polarization side radiating element 110 and the vertical polarization side radiating element 114 are disposed substantially orthogonal to the shield cylinder 119 disposed in the middle of the arm 118. The horizontally polarized radiation element 110 and the vertically polarized radiation element 114 are dipole elements. On the subsequent rear side, the horizontal polarization side reflection element 112 and the vertical polarization side reflection element 116 are disposed substantially orthogonal to the second arm 118b. In this case, the horizontally polarized wave side waveguide element 111, the horizontally polarized wave side radiating element 110 and the horizontally polarized wave side reflecting element 112 are arranged in a horizontal plane substantially parallel to each other to form a horizontally polarized wave Yagi antenna. doing. Further, the vertical polarization side waveguide element 115, the vertical polarization side radiation element 114, and the vertical polarization side reflection element 116 are arranged in a vertical plane substantially parallel to each other to form a vertical polarization Yagi antenna. doing.

FIG. 19 and FIG. 20 show a fixing structure for fixing the horizontally polarized wave side waveguide element 111 and the vertically polarized wave side waveguide element 115 to the first arm 118a in the conventional polarized wave Yagi type antenna 101. FIG. 19 is a front view showing a cross-sectional view of a conventional waveguide element mounting structure of the dual-polarization Yagi antenna 101. FIG. 20 is a cross-sectional view of a conventional waveguide element mounting structure of the dual-polarization Yagi antenna 101. It is a side view shown in a figure.
In the mounting structure shown in these drawings, the horizontally polarized wave side waveguide element 111 is composed of waveguide elements 111a and 111b divided into two, and a screw is formed on the outer peripheral surface of the root part of the waveguide elements 111a and 111b. Has been. Further, the vertical polarization side waveguide element 115 includes waveguide elements 115a and 115b divided into two parts, and screws are formed on the outer peripheral surfaces of the root portions of the waveguide elements 115a and 115b. A cylindrical inner ring 150 is inserted into the first arm 118a having a circular cross section. The inner ring 150 is made of metal or resin, and the inner ring 150 is formed with four screw holes in which screws are formed at an angle of about 90 ° to each other. In addition, insertion holes corresponding to the screw holes of the inner ring 150 are provided at positions where the plurality of horizontal polarization side waveguide elements 111 and vertical polarization side waveguide elements 115 are attached to the first arm 118a. Four are formed to have an angle of °.

  The screws formed at the root portions of the waveguide elements 111a and 111b of the horizontal polarization side waveguide element 111 and the waveguide elements 115a and 115b of the vertical polarization side waveguide element 115 protrude by a predetermined length. As described above, the fixing bracket 120a is fixed to the waveguide element 111a, the fixing bracket 120b is fixed to the waveguide element 111b, the fixing bracket 121a is fixed to the waveguide element 115a, and the fixing bracket 121b is fixed to the waveguide element 115b. Next, bushes 151a, 151b, 151c and 151d are inserted into the screws protruding from the waveguide elements 111a and 111b and the waveguide elements 115a and 115b, respectively, and the position of the inner ring 150 inserted into the first arm 118a is determined. The screw holes are adjusted to be aligned with the insertion holes formed in the first arm 118a, and the waveguide elements 111a and 111b of the horizontal polarization side waveguide element 111 and the vertical polarization side waveguide element 115 are guided to the insertion holes, respectively. The wave elements 115 a and 115 b are inserted, and screws formed at the roots of the wave elements 115 a and 115 b are respectively screwed into the screw holes of the inner ring 150. Further, by rotating the fixing brackets 120a, 120b, 121a, and 121b and fastening them to the inner ring 150, the waveguide elements 111a and 111b of the horizontal polarization side waveguide element 111 and the vertical polarization side waveguide element 115 are fixed. The waveguide elements 115a and 115b can be fixed to the first arm 118a so as to be orthogonal to each other. A plurality of inner rings 150 are inserted into the first arm 118a corresponding to the plurality of insertion holes formed in the first arm 118a, and a plurality of inner rings 150 are used by using the inner rings 150a. The horizontally polarized wave side waveguide element 111 and the vertically polarized wave side waveguide element 115 are fixed to the first arm 118a so as to be orthogonal to each other.

21 and 22 show a fixing structure in which the horizontal polarization side reflection element 112 and the vertical polarization side reflection element 116 are fixed to the second arm 118b in the conventional Yagi type antenna 101 for both polarizations. FIG. 21 is a front view showing a reflection element mounting structure of a conventional dual-polarization Yagi antenna 101 in a sectional view, and FIG. 22 is a sectional view of a reflection element mounting structure of a conventional dual-polarization Yagi antenna 101. FIG.
In the mounting structure shown in these drawings, the horizontal polarization side reflection element 112 is composed of two reflection elements 112a and 112b, and a screw is formed inside the base part of the reflection elements 112a and 112b. The vertical polarization side reflection element 116 includes reflection elements 116a and 116b divided into two, and a screw is formed inside the base part of the reflection elements 116a and 116b. Further, a cylindrical outer ring 153 is fitted on the outer side of the second arm 118b having a circular cross section, and the four bosses 152a and 152b are projected on the outer peripheral surface of the outer ring 153 at an angle of about 90 °. , 152c and 152d are formed. The outer ring 153 is made of metal or resin, and screw holes are provided through the bosses 152a to 152d.

Screw portions 112c and 112d and screw portions 116c and 116d are screwed onto the bosses 152a to 152d, respectively, and the tips of the screw portions 112c and 112d and the screw portions 116c and 116d are brought into pressure contact with the outer peripheral surface of the second arm 118b. Next, the spring seats 112f and 112h and the spring seats 116f and 116h are fitted and inserted into the screw parts 112c and 112d and the screw parts 116c and 116d, respectively, and the hexagonal nuts 112e and 112g are inserted into the screw parts 112c, 112d and screwed hexagonal nuts 116e and 116g to screw parts 116c and 116d, respectively. As a result, the tips of the screw portions 112c, 112d, 116c, and 116d are pressed against the outer peripheral surface of the second arm 118b, so that the outer ring 153 is fixed to a predetermined position of the second arm 118b in a non-rotatable manner.
Then, the screws formed inside the reflecting elements 112a and 112b are screwed into the screw portions 112c and 112d protruding from the nuts 112e and 112g with a predetermined length, respectively. In addition, screws formed inside the reflecting elements 116a and 116b are screwed to the screw portions 116c and 116d protruding from the nuts 116e and 116g, respectively, by a predetermined length. Thereby, the reflection elements 112a and 112b of the horizontal polarization side reflection element 112 are fixed to the screw portions 112c and 112d, and the reflection elements 116a and 116b of the vertical polarization side reflection element 116 are fixed to the screw portions 116c and 116d. Accordingly, the horizontal polarization side reflection element 112 and the vertical polarization side reflection element 116 are fixed to the second arm 118b so as to be orthogonal to each other.

Further, FIG. 23 is a side view showing a cross-sectional view of the configuration of the power feeding unit in the conventional polarization-sharing Yagi antenna 101.
In the feeding section shown in this figure, power is fed from the coaxial cable 140 to the horizontally polarized radiation element 110 composed of two radiation elements 110a and 110b via a balanced / unbalanced converter, and the two radiation elements 114a, The vertical polarization side radiating element 114 consisting of 114b is fed from a coaxial cable 141 via a balanced / unbalanced converter. In the power feeding section that feeds power to the horizontally polarized radiation element 110, the power feeding end, which is one end of one radiation element 110 a, is fixed to the outer peripheral surface at the tip of the outer conductor 140 b of the coaxial cable 140 and is electrically connected. The internal conductor 140a connected and led out from the front end of the coaxial cable 140 is folded and used as the internal conductor of the branch conductor 142 arranged in parallel. In the coaxial cable 140, the inner conductor 140a is supported by an insulator and disposed at the center of the outer conductor 140b. In the branch conductor 142, the inner conductor 140a is supported by the insulator and disposed at the center of the outer conductor 142b. ing. In addition, the feeding end, which is one end of the other radiating element 110b, is fixed to and electrically connected to the outer peripheral surface at the tip of the outer conductor 142b of the branch conductor 142. Further, the length of the branch conductor 142 is about λ / 4, and the lower end surface of the outer conductor 142b in the branch conductor 142 is connected to the short-circuit plate 144. The short-circuit plate 144 is connected to the outer conductor 140b of the coaxial cable 140. It is connected to the outer peripheral surface. That is, the lower end of the branch conductor 142 having a length of about λ / 4 is short-circuited by the short-circuit plate 144 to the outer conductor 140b at a position about λ / 4 below the front end of the coaxial cable 140. Further, the inner conductor 140a of the branch conductor 142 is inserted from the tip to a depth of about λg / 4, and the tip is open. Thus, the length of the inner conductor 140a in the branch conductor 142 is about λg / 4. Note that λg is an in-tube wavelength in the branch conductor 142. As described above, the balanced / unbalanced converter that supplies power to the horizontally polarized radiation element 110 includes the coaxial cable 140, the branch conductor 142, and the short-circuit plate 144.

  In addition, in the power feeding section that feeds power to the vertically polarized radiation element 114, power is fed from the coaxial cable 141 to the vertically polarized radiation element 114 including the two radiation elements 114a and 114b via a balanced / unbalanced converter. Yes. That is, the feeding end, which is one end of one of the radiating elements 114a, is fixed and electrically connected to the outer peripheral surface at the tip of the outer conductor 141b of the coaxial cable 141, and the inner conductor 141a led out from the tip of the coaxial cable 141 is connected. The inner conductor of the branch conductor 143 is folded and arranged in parallel. In the coaxial cable 141, the inner conductor 141a is supported by an insulator and disposed at the approximate center of the outer conductor 141b. In the branch conductor 143, the inner conductor 141a is supported by an insulator and disposed at the approximately center of the outer conductor 143b. ing. In addition, the feeding end, which is one end of the other radiating element 114b, is fixed to and electrically connected to the outer peripheral surface at the tip of the outer conductor 143b of the branch conductor 143. Further, the length of the branch conductor 143 is approximately λ / 4, the lower end surface of the outer conductor 143b of the branch conductor 143 is connected to the short-circuit plate 145, and the short-circuit plate 145 is connected to the outer conductor 141b of the coaxial cable 141. It is connected to the outer peripheral surface. That is, the lower end of the branch conductor 143 having a length of about λ / 4 is short-circuited by the short-circuit plate 145 to the outer conductor 141b at a position about λ / 4 below the tip of the coaxial cable 141. Further, the inner conductor 141a in the branch conductor 143 is inserted from the tip to a depth of about λg / 4, and the tip is open. Thus, the length of the inner conductor 141a in the branch conductor 143 is about λg / 4. Note that λg is the guide wavelength in the branch conductor 143. As described above, the balanced / unbalanced converter that supplies power to the vertically polarized radiation element 114 includes the coaxial cable 141, the branch conductor 143, and the short-circuit plate 145.

The unbalanced signal transmitted through the coaxial cables 140 and 141 by the two balanced / unbalanced converters in the power supply unit is converted into a balanced signal, and the balanced horizontal radiating elements 110a and 110b and the vertically polarized wave are converted. Power is supplied to the radiating elements 114a and 114b.
The leakage current does not flow theoretically in the horizontal polarization side feed section and the vertical polarization side feed section in the feed section, but in reality a small amount of leak current is generated, and the influence of the leakage current on the radiation field is It comes to occur. In view of this, in the conventional Yagi type antenna 101 for both polarizations, the horizontal polarization side power supply unit and the vertical polarization side power supply unit provided with balanced / unbalanced converters are arranged so as to intersect with each other to be compact. The horizontal polarization side power supply unit and the vertical polarization side power supply unit can be accommodated in the shield cylinder 119. A first arm 118a and a second arm 118b made of divided metal pipes are fixed to the front and rear of the shield cylinder 119, and are integrated with the shield cylinder 119. As a result, even if a very small amount of leakage current occurs in the horizontal polarization side feeding unit and the vertical polarization side feeding unit, the influence of the leakage current on the radiation field can be prevented.

JP 2011-239198 A

In the conventional dual-polarization Yagi-type antenna, the waveguide element, the radiating element, and the reflecting element that constitute the horizontal polarization side Yagi antenna, and the waveguide element, the radiating element, and the reflection that constitute the vertical polarization side Yagi antenna. The elements can be mounted so as to cross the central axis of the arm and to be orthogonal to each other. In addition, the radiating element in the horizontally polarized Yagi antenna fed from the coaxial cable and the radiating element in the vertically polarized Yagi antenna are fed via a balanced / unbalanced converter housed in the arm. I am doing so. As a result, the conventional cross-polarization Yagi-type antenna can obtain an excellent degree of cross polarization discrimination.
However, in the conventional Yagi-type antenna for dual polarization, the fixing structure for fixing the waveguide element, the radiating element, and the reflecting element constituting each of the horizontal polarization side and the vertical polarization side Yagi antenna to the arm is complicated. In addition, there is a problem that the work of disassembling and assembling becomes complicated because the number of fixed parts increases. In this case, when commercialized in an assembled state, each element constituting the Yagi antenna on the horizontal polarization side and each element constituting the Yagi antenna on the vertical polarization side are arranged orthogonally, so that the storage volume As a result, the problem of increased packaging, transportation and management costs arises.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a polarization-shared Yagi type antenna that can be easily disassembled and assembled to obtain a good degree of cross polarization discrimination.

  The dual-polarization Yagi-type antenna of the present invention is arranged on a first plane including substantially the central axis of the arm (2), and is at least one first waveguide element (11) fixed to the arm (2). And a first radiating element (10) disposed on the first plane and detachably fixed to the arm (2) adjacent to the rear of the first waveguide element (11), At least one first reflecting element (12) disposed on the first plane and fixed to the arm (2) adjacent to the rear of the first radiating element (10); and on the first plane A first Yagi antenna composed of the first waveguide element (11), the first radiating element (10), and the first reflecting element (12) disposed in the Waveguide element fixtures (30, 31) that are rotatably fixed to the arm (2). The same number of second waveguide elements (21) as the first waveguide elements (11) sandwiched between the first plane and the second plane that is orthogonal to the first plane and includes substantially the central axis of the arm (2) Between the second radiating element (20) and the second radiating element (20) detachably fixed to the arm (2) adjacent to the rear of the second waveguide element (21) Is sandwiched between reflective element fixtures (30, 31) fixed to the arm (2) so as to be rotatable, and is arranged adjacent to the rear of the second radiating element (20). The same number of second reflective elements (22) as the reflective elements (12), the second waveguide element (21), the second radiating element (20), and the second reflective element (22). A waveguide element fixture (30, 31) and a reflection element attachment (30, 31) is configured by arranging two element fixtures (30, 31) so as to face each other, and the element fixture (30, 31) has an element insertion groove (30d, 31) substantially at the center. 31d) arc-shaped saddle portions (30c, 31c) and semicircular holding portions (30a, 30b, 31a, 31b) formed on both sides of the saddle portions (30c, 31c), respectively. ), And the two element attachments (30, 31) face each other so that the arm (2) is rotatably held between the saddle portions (30c, 31c) facing each other. When fixed to the arm (2), the end portion of the second waveguide element (21) or the second reflection element (22) half-turned faces the two element attachments (30, 31). The holding portions (30a, 30b, 31a, 31 b) The waveguide element fixtures (30, 31) to which the second waveguide element (21) is fixed are sandwiched between and fixed to the arm (2). By moving the waveguide element (11) so as to press fit into the element insertion grooves (30d, 31d), the second waveguide element (21) is arranged on the second plane, and the second reflective element ( 22) The reflective element fixture (30, 31) to which the adhesive member 22 is fixed is press-fitted into the insertion groove (30d, 31d) of the first reflective element (12) that is fixed to the arm (2). By moving, the second reflection element (22) is arranged on the second plane, the waveguide element fixture (30, 31) to which the second waveguide element (21) is fixed, and the second The reflection element fixture (30, 31) to which the reflection element (22) is fixed The main feature is that the second waveguide element (21) and the second reflection element (22) can be arranged on the first plane by rotating with respect to the arm (2). .

According to the present invention, the second waveguide element (21) fixed to the waveguide element fixture (30, 31) and the second reflection element (22) fixed to the reflection element fixture (30, 31) are provided. It can rotate and arrange | position on the 1st plane in which the 1st waveguide element (11), 1st radiation element (10), and 1st reflective element (12) of a 1st Yagi antenna are arrange | positioned. At this time, the detachable first radiating element (10) and the second radiating element (20) can be removed from the arm (2) to make the volume extremely small. That is, the packing volume when packing can be reduced. The first waveguide element (11) is press-fitted into the element insertion grooves (30d, 31d) of the waveguide element fixture (30, 31) to which the second waveguide element (21) is fixed, and By inserting the first reflective element (12) into the element insertion grooves (30d, 31d) of the reflective element fixture (30, 31) to which the two reflective elements (22) are fixed, the second waveguide element (21 ) And the second reflective element (22) can be arranged on the second plane. As described above, the polarization-shared Yagi antenna (1) of the present invention can be easily disassembled and assembled, and can reduce the packaging volume, thereby reducing the cost of packaging, transportation, and management. be able to.
In addition, when attaching the first Yagi antenna and the second Yagi antenna, they can be fixed so as to cross each other so as to be orthogonal to each other on a plane passing through the substantially central axis of the arm (2). In the shared Yagi-type antenna (1), excellent cross polarization discrimination can be obtained.

It is a perspective view which shows the structure of the polarization shared Yagi-type antenna concerning the Example of this invention. It is the perspective view, top view, and front view which show the structure of the 1st element fixture in the polarization shared Yagi-type antenna of this invention. It is the perspective view, top view, and front view which show the structure of the 2nd element fixture in the polarization shared Yagi-type antenna of this invention. It is a perspective view which shows the 1st procedure which assembles the polarization sharing Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows the 2nd procedure and 3rd procedure which assemble the polarization sharing Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows the structure of the feed part for horizontal polarization in the polarization shared Yagi-type antenna of this invention. It is a bottom view which shows the structure of the feed part for horizontal polarization in the polarization shared Yagi-type antenna of this invention. It is a rear view which shows the structure of the feed part for horizontal polarization in the polarization shared Yagi-type antenna of this invention. It is a side view which shows the structure of the feed part for horizontal polarization in the polarization shared Yagi-type antenna of this invention. It is a perspective view which shows the structure of the feed part for vertical polarization | polarized-light in the polarization shared Yagi-type antenna of this invention. It is a bottom view which shows the structure of the feed part for vertically polarized waves in the dual-polarization Yagi type antenna of this invention. It is a front view which shows the structure of the feed part for vertical polarization in the Yagi-type antenna for both polarizations of this invention. It is a side view which shows the structure of the feed part for vertical polarization in the polarization shared Yagi-type antenna of this invention. It is a perspective view which shows the 1st procedure which assembles the electric power feeding part of the polarization shared Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows the 2nd procedure which assembles the electric power feeding part of the polarization shared Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows the 3rd procedure which assembles the electric power feeding part of the polarization shared Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows the 4th procedure which assembles the electric power feeding part of the polarization shared Yagi-type antenna concerning the Example of this invention. It is a perspective view which shows an example of a structure of the conventional polarization shared Yagi-type antenna. It is a front view which shows the adhering structure of the waveguide element in the conventional polarization shared Yagi type | mold antenna with sectional drawing. It is a top view which shows the adhering structure of the waveguide element in the conventional Yagi type antenna for both polarizations by sectional drawing. It is a front view which shows the adhering structure of the reflective element in the conventional Yagi type antenna for both polarizations by sectional drawing. It is a top view which shows the adhering structure of the reflective element in the conventional Yagi type antenna for both polarizations by a sectional view. It is a top view which shows the structure of the electric power feeding part in the conventional polarization shared Yagi-type antenna with sectional drawing.

FIG. 1 is a perspective view showing a configuration of a polarization-shared Yagi antenna 1 according to an embodiment of the present invention.
A polarization-shared Yagi antenna 1 according to an embodiment of the present invention shown in this figure includes a pipe-shaped metal arm 2 having a circular cross section, and is perpendicular to a horizontally polarized Yagi antenna fixed to the arm 2. It consists of a Yagi antenna for polarization. The horizontally polarized wave Yagi antenna includes a plurality of (for example, 6) horizontally polarized wave waveguide elements 11 and a horizontally polarized wave radiating element disposed adjacent to the rear of the horizontally polarized wave waveguide element 11. 10 and a horizontally polarized wave reflecting element 12 arranged adjacent to the rear of the horizontally polarized wave radiating element 10. The outer diameters of these linear elements 10 to 12 are the same, and are arranged in a horizontal plane including substantially the central axis of the arm 2, and are composed of a lightweight metal pipe such as aluminum. The vertically polarized Yagi antenna includes a plurality of (for example, six) vertically polarized waveguide elements 21 and vertically polarized waves disposed adjacent to the back of the vertically polarized waveguide elements 21. The radiating element 20 includes a vertically polarized wave reflecting element 22 disposed adjacent to the back of the vertically polarized wave radiating element 20. The outer diameters of these linear elements 20 to 22 are the same, and are arranged in a vertical plane substantially including the central axis of the arm 2 and are made of a lightweight metal pipe such as aluminum. . The horizontally polarized radiation element 10 and the vertically polarized radiation element 20 are dipole elements.

  The dual-polarization Yagi antenna 1 according to the present invention has the same frequency band for horizontal polarization and vertical polarization, and when the wavelength of the frequency band of the dual-polarization Yagi antenna 1 is λ, The lengths of the horizontally polarized wave radiating element 10 and the vertically polarized wave radiating element 20 are approximately λ / 2, and a plurality of horizontal polarized wave radiating elements 11 and vertical polarized wave radiating elements 21 are provided. The length is slightly shorter than about λ / 2, and the lengths of the horizontal polarization reflection element 12 and the vertical polarization reflection element 22 are slightly longer than about λ / 2. Also, a plurality of horizontal polarization waveguide elements 11 and vertical polarization waveguide elements 21, horizontal polarization radiation elements 10 and vertical polarization radiation elements 20, horizontal polarization reflection elements 12 and vertical polarization waves The interval between the elements in the reflective element 22 is about λ / 4. As a result, the horizontal polarization waveguide element 11 and the vertical polarization waveguide element 21 become capacitive, and the horizontal polarization reflection element 12 and the vertical polarization reflection element 22 become inductive. Horizontally polarized and vertically polarized sharp radiation beams with small half-value angles in the direction from the wave reflecting element 12 and the vertically polarized wave reflecting element 22 to the horizontally polarized wave waveguide element 11 and the vertically polarized wave waveguide element 21 It has a directivity characteristic having.

  In the dual-polarization Yagi antenna 1 according to the present invention, each of the plurality of vertically polarized wave waveguide elements 21 and the vertically polarized wave reflecting element 22 is attached to the arm 2 by an element attachment 24. Yes. In this case, the vertical polarization waveguide element 21 and the vertical polarization reflection element 22 are half-wrapped, and the half-turned end portion is sandwiched and fixed by the element mounting member 24. The element attachment 24 to which the end of the vertically polarized wave waveguide element 21 or the vertically polarized wave reflecting element 22 is fixed can be rotated with respect to the arm 2 and can slide along the arm 2. . The element attachment 24 is configured by arranging a first element attachment 30 and a second element attachment 31, which will be described later, facing each other. Therefore, the detailed configuration of the first element fixture 30 is shown in FIGS. 2A, 2B, and 2C, and the detailed configuration of the second element fixture 31 is shown in FIGS. 3A, 3B, and 3C. FIG. 2A is a perspective view showing the configuration of the first element fixture 30, FIG. 2B is a top view showing the configuration of the first element fixture 30, and FIG. FIG. 3A is a front view showing the configuration of the element mounting tool 30, FIG. 3A is a perspective view showing the configuration of the second element mounting tool 31, and FIG. 3B shows the configuration of the second element mounting tool 31. FIG. 3C is a top view, and FIG. 3C is a front view showing the configuration of the second element fixture 31.

  As shown in these drawings, the first element attachment 30 and the second element attachment 31 are made by processing a metal plate and have substantially the same configuration, but the first element attachment 30 A first screw hole 31e and a second screw hole 31f are formed in the second element attachment 31 in place of the first insertion hole 30e and the second insertion hole 30f formed in FIG. That is, the first element attachment 30 and the second element attachment 31 are formed with semicircular saddle portions 30c and 31c at substantially the center, and the element at the top that is substantially at the center of the saddle portions 30c and 31c. Insertion grooves 30 d and 31 d are formed in the longitudinal direction of the arm 2. The widths of the element insertion grooves 30d and 31d have substantially the same outer diameter. The horizontal polarization waveguide element 11 or the horizontal polarization reflection element 12, the vertical polarization waveguide element 21, or the vertical polarization reflection element. The width can be press-fitted into 22. Further, the inner diameters of the saddle portions 30c and 31c are substantially the same as the outer diameter of the arm 2, and when the first element mounting tool 30 and the second element mounting tool 31 face each other with the arm 2 interposed therebetween, the saddle section The arm 2 is held between 30c and 31c.

  On both sides of the saddle portions 30c and 31c, there are formed first holding portions 30a and 31a and second holding portions 30b and 31b having a semicircular cross section. The inner diameters of the first holding parts 30a and 31a and the second holding parts 30b and 31b are substantially the same as the outer diameters of the elements 10 to 12 and the elements 20 to 22, and the first holding parts 30a and 31a Planar bent portions 30g and 31g are formed on both sides of the second holding portions 30b and 31b, and the first holding portions 30a and 31a and the second holding portions 30b and 30b are formed by the bent portions 30g and 31g. The mechanical strength is improved so that it does not bend with 31b. As described above, the first holding part 30a and the second holding part 30b of the first element attachment 30 are formed with the first insertion hole 30e and the second insertion hole 30f, respectively. A first screw hole 31e and a second screw hole 31f are formed in the first holding part 31a and the second holding part 31b, respectively.

When the first element attachment 30 and the second element attachment 31 are opposed to each other with the arm 2 sandwiched therebetween, the vertically polarized waveguide element 21 or the vertical polarization waveguide 21 is interposed between the opposed first holding portions 30a and 31a. One end portion of the wave reflection element 22 half-turned can be sandwiched, and the vertical polarization waveguide element 21 or the vertical polarization reflection element 22 is interposed between the second holding portions 30b and 31b facing each other. The other half-finished end can be clamped. Then, the screw inserted into the first insertion hole 30e is inserted into the insertion hole formed in one half-end portion of the vertical polarization waveguide element 21 or the vertical polarization reflection element 22, and the first The screw screwed into the screw hole 31e and inserted into the second insertion hole 30f is inserted into the insertion hole formed at the other half end portion of the vertical polarization waveguide element 21 or the vertical polarization reflection element 22 which is half-turned. By inserting and screwing into the second screw hole 31f, the vertically polarized waveguide element 21 or the vertically polarized wave is formed on the element fixture 24 composed of the first element fixture 30 and the second element fixture 31. The reflective element 22 can be fixed.
In this case, by slightly loosening the screws screwed into the first screw hole 31e and the second screw hole 31f, the element attachment 24 to which the vertical polarization waveguide element 21 or the vertical polarization reflection element 22 is fixed. Can be rotated or slid with respect to the arm 2.

Next, FIG. 4 is a perspective view showing a first procedure for assembling the dual-polarization Yagi antenna 1 according to the present invention, and FIG. 5 is a perspective view showing a second procedure for assembling the dual-polarization Yagi antenna 1. FIG. 5B is a perspective view showing a third procedure for assembling the polarization shared Yagi-type antenna 1 in a). However, in FIGS. 4 and 5, only a part of the arm 2 on which the waveguide element of the dual-polarization Yagi antenna 1 is arranged is shown, and the radiating element and the reflecting element are omitted.
In order to assemble the dual-polarization Yagi antenna 1 according to the present invention, first, as shown in FIG. 4, a plurality of horizontal polarization waveguides are provided on the arm 2 in a horizontal plane including the central axis of the arm 2. The elements 11a, 11b, and 11c are fixed. In this case, the horizontal polarization waveguide elements 11a to 11c are fixed to the arm 2 by a fixing method such as caulking. Then, the first element mounting tool 30 and the second element mounting tool 31 are arranged to face each other so as to sandwich the front arm 2 of the horizontal polarization waveguide element 11b fixed to the arm 2, and the first The end portion of one vertically polarized waveguide element 21b1 that is half-turned is disposed so as to be sandwiched between the first holding portions 30a and 31a facing each other between the element attachment 30 and the second element attachment 31 Then, the end portion of the other vertically polarized waveguide element 21b2 that is half-turned is disposed so as to be sandwiched between the second holding portions 30b and 31b facing each other.

  Then, a screw 25a is inserted into the first insertion hole 30e formed in the first holding portion 30a of the first element fixture 30, and this screw 25a is inserted into the end of one vertical polarization waveguide element 21b1. It is inserted into the formed insertion hole 26 a and screwed into the first screw hole 31 e formed in the first holding portion 31 a of the second element attachment 31. Further, the screw 25b is inserted into the second insertion hole 30f formed in the second holding portion 30b of the first element fixture 30, and the screw 25b is inserted into the end of the other vertical polarization waveguide element 21b2. It is inserted into the formed insertion hole 26 b and screwed into the second screw hole 31 f formed in the second holding portion 31 b of the second element attachment 31. As a result, the state shown in FIG. That is, the end portion of one vertical polarization waveguide element 21b1 is sandwiched and fixed between the first holding portions 30a and 31a, and the other vertical polarization portion is interposed between the second holding portions 30b and 31b. The end of the wave waveguide element 21b2 is clamped and fixed. Further, the outer peripheral surface of the arm 2 is held between the saddle portions 30 c and 31 c of the first element attachment 30 and the second element attachment 31. Here, when the screws 25a and 25b are slightly loosened, the element attachment 24 including the first element attachment 30 and the second element attachment 31 to which the vertically polarized waveguide elements 21b1 and 21b2 are fixed is attached to the arm 2. The vertical polarization waveguide elements 21b1 and 21b2 can be arranged in a horizontal plane where the horizontal polarization waveguide elements 11a to 11c are arranged, and a vertical plane orthogonal to the horizontal plane. Can also be placed inside.

Therefore, the vertical polarization waveguide elements 21b1 and 21b2 are arranged in a vertical plane including the substantially central axis of the arm 2 orthogonal to the horizontal plane where the horizontal polarization waveguide elements 11a to 11c are arranged. When the 1-element fixture 30 and the second-element fixture 31 are slid on the arm 2 toward the horizontally polarized wave-guide element 11b, the first-element fixture 30 and the second-element fixture 31 are formed. The horizontal polarization waveguide element 11b is press-fitted into the element insertion grooves 30d and 31d whose rear ends are semicircular, and the state shown in FIG. 5B is obtained. The horizontal polarization waveguide element 11b is press-fitted until it comes into contact with the semicircular rear ends of the element insertion grooves 30d and 31d, and in this state, the screws 25a and 25b are fastened to The vertically polarized waveguide elements 21b1 and 21b2 can be fixed in a vertical plane including the substantially central axis of the arm 2 orthogonal to the horizontal plane where the waveguide elements 11a to 11c are disposed. In this case, the central axis of the horizontal polarization waveguide element 11 b and the central axis of the vertical polarization waveguide elements 21 b 1 and 21 b 2 intersect on the substantially central axis of the arm 2. That is, the horizontal polarization waveguide element 11 b and the vertical polarization waveguide elements 21 b 1 and 21 b 2 are arranged in a vertical plane orthogonal to the central axis of the arm 2.
Since the number of the vertical polarization waveguide elements 21 is the same as the number of the horizontal polarization waveguide elements 11, as shown in FIG. Each of the waveguide elements 21 is disposed and fixed by an element fixture 24 including a first element fixture 30 and a second element fixture 31. Then, as shown in FIGS. 5A and 5B, each of the vertically polarized waveguide elements 21 is rotated with respect to the arm 2 so that the horizontally polarized waveguide elements 11 are arranged. It can be arranged in a horizontal plane, and can also be arranged and fixed in a vertical plane including substantially the central axis of the arm 2 orthogonal to the horizontal plane.

  Although not shown in FIGS. 4 and 5, the vertical polarization reflection element 22 is also fixed to the arm 2 in the same manner as the vertical polarization waveguide element 21. That is, the first element mounting tool 30 and the second element mounting tool 31 are arranged to face each other so as to sandwich the front arm 2 of the horizontal polarization reflecting element 12 fixed to the arm 2, and the first element The end portion of one of the vertically polarized reflective elements 22 is arranged so as to be sandwiched between the first holding portions 30a and 31a facing the fixture 30 and the second element fixture 31, The end of the other vertically polarized reflective element 22 is disposed so as to be sandwiched between the second holding portions 30b and 31b facing each other. Then, a screw 25a is inserted into the first insertion hole 30e formed in the first holding portion 30a of the first element fixture 30, and this screw 25a is formed at the end of one vertical polarization reflection element 22. The first insertion hole 31e formed in the first holding portion 31a of the second element attachment 31 is screwed into the insertion hole. Further, a screw 25b is inserted into the second insertion hole 30f formed in the second holding portion 30b of the first element fixture 30, and this screw 25b is formed at the end of the other vertical polarization reflecting element 22. The second insertion hole 31f of the second element attachment 31 is screwed into the second screw hole 31f formed through the insertion hole.

As a result, the end of one vertical polarization reflecting element 22 is sandwiched and fixed between the first holding portions 30a and 31a, and the other vertical polarization portion is interposed between the second holding portions 30b and 31b. The end of the wave reflection element 22 is clamped and fixed. Further, the outer peripheral surface of the arm 2 is held between the saddle portions 30 c and 31 c of the first element attachment 30 and the second element attachment 31. Here, when the screws 25a and 25b are slightly loosened, the element attachment 24 composed of the first element attachment 30 and the second element attachment 31 to which the vertically polarized reflection element 22 is fixed is attached to the arm 2. The vertical polarization reflection element 22 can be disposed in a horizontal plane in which the horizontal polarization reflection element 12 is rotated, and can be disposed in a vertical plane orthogonal to the horizontal plane.
Therefore, the vertical polarization reflection element 22 is arranged in a vertical plane including substantially the central axis of the arm 2 orthogonal to the horizontal plane where the horizontal polarization reflection element 12 is arranged, and the first element attachment 30 and When the second element attachment 31 is slid on the arm 2 toward the horizontal polarization reflection element 12, the rear ends formed on the first element attachment 30 and the second element attachment 31 are semicircular. The horizontally polarized reflection element 12 is press-fitted into the element insertion grooves 30d, 31d. The horizontal polarization reflection element 12 is press-fitted until it comes into contact with the semicircular rear ends of the element insertion grooves 30d and 31d. In this state, the screws 25a and 25b are fastened to thereby The vertically polarized reflection element 22 can be fixed in a vertical plane including the substantially central axis of the arm 2 orthogonal to the horizontal plane on which the reflection element 12 is disposed. In this case, the central axis of the horizontal polarization reflection element 12 and the central axis of the vertical polarization reflection element 22 intersect substantially on the central axis of the arm 2. That is, the horizontal polarization reflection element 12 and the vertical polarization reflection element 22 are arranged in a vertical plane orthogonal to the central axis of the arm 2.
The number of horizontal polarization reflection elements 12 is not limited to one, and a plurality of horizontal polarization reflection elements 12 can be provided. The number of vertical polarization reflection elements 22 is the same as the number of horizontal polarization reflection elements 12.

As described above, the plurality of vertical polarization waveguide elements 21 and the vertical polarization reflection elements 22 fixed to the element fixture 24 are connected to the plurality of horizontal polarization waveguide elements 11 and the horizontal polarization. A state where the wave reflection element 12 is arranged in a horizontal plane can be set as a packing state. In this packing state, the height of the polarization sharing Yagi antenna 1 is within the height of the element fixture 24. Therefore, the packaging volume can be made extremely small as compared with the case of packaging in a state where the horizontally polarized Yagi antenna and the vertically polarized Yagi antenna are mounted orthogonally. That is, the packing box at the time of packing can be made into a small box. The horizontally polarized radiation element 10 and the vertically polarized radiation element 20 are packed in a state where they are detached from the arm 2.
In the above description, an element in which the vertical polarization waveguide element 21 and the vertical polarization reflection element 22 are fixed to the front side of the horizontal polarization waveguide element 11 and the horizontal polarization reflection element 12 fixed to the arm 2. Although the fixture 24 is arranged, the element fixture 24 may be rotated 180 ° so that the arrangement positions of the first holding parts 30a and 31a and the second holding parts 30b and 31b are changed on the left and right. . In this case, an element in which a vertical polarization waveguide element 21 and a vertical polarization reflection element 22 are fixed to the rear side of the horizontal polarization waveguide element 11 and the horizontal polarization reflection element 12 fixed to the arm 2. What is necessary is just to arrange | position the fixture 24. FIG.

As described above, in the dual-polarization Yagi antenna 1 according to the present invention, the vertical polarization waveguide element 21 and the vertical polarization reflection element 22 are rotated from the packed state to the element insertion grooves 30d and 31d. By inserting the horizontal polarization waveguide element 11 and the horizontal polarization reflection element 12 respectively, the waveguide element and the reflection element of the vertical polarization Yagi antenna can be easily assembled. Also, the horizontally polarized radiation element 10 and the vertically polarized radiation element 20 can be easily assembled. Therefore, the configurations of the horizontally polarized radiation element 10 and the vertically polarized radiation element 20 will be described next.
The configurations of the horizontally polarized wave feeding unit 13 and the horizontally polarized wave radiating element 10 in the dual-polarization Yagi antenna 1 of the present invention are shown in FIGS. FIG. 6 is a perspective view showing the configuration of the horizontal polarization feed unit 13 and the horizontal polarization radiating element 10, and FIG. 7 is a bottom view showing the configuration of the horizontal polarization feed unit 13 and the horizontal polarization radiating element 10. FIG. 8 is a front view showing the configuration of the horizontally polarized wave feeding unit 13 and the horizontally polarized wave radiating element 10, and FIG. 9 is a diagram of the horizontally polarized wave feeding unit 13 and the horizontally polarized wave radiating element 10. It is a side view which shows a structure.

  The horizontal polarization power supply unit 13 shown in these drawings has a storage space for storing a balanced / unbalanced converter therein, and the storage space includes a main body 13a in the shape of a prismatic pipe, It is formed by a front lid and a rear lid that close the opened front and rear surfaces of the main body 13a. The front lid and the rear lid are attached to the main body portion 13a by three attachment screws 13f inserted through both sides of the upper center and the lower portion. The first fitting portion 13b and the second fitting portion 13c are formed so as to protrude from the lower portion of the main body portion 13a to the rear surface side. The first fitting portion 13b and the second fitting portion 13c are notched, and a semicircular groove portion 13g is formed on the lower surface of the main body portion 13a. The inner diameter of the semicircular groove portion 13g is substantially the same as the outer diameter of the arm 2, and a positioning convex portion 13d and a screw hole 13e are arranged in front and rear at the top of the semicircular groove portion 13g. It is formed with. The first fitting portion 13b and the second fitting portion 13c are formed with insertion holes having a circular cross section in the direction orthogonal to the arm 2, and the bottom surface is closed. The inner diameter of the insertion hole is substantially equal to the outer diameter of the horizontally polarized radiation elements 10a and 10b. One end of the horizontally polarized radiation element 10a that is half-turned is inserted into the insertion hole of the first fitting portion 13b, and the other half-turned portion is inserted into the insertion hole of the second fitting portion 13c. An end of the horizontally polarized radiation element 10b is inserted. And by screwing screws into the insertion holes 13h formed on the rear side of the first fitting portion 13b and the second fitting portion 13c, the first fitting portion 13b and the second fitting portion 13c The horizontally polarized radiation element 10a and the horizontally polarized radiation element 10b constituting the dipole element are fixed to each other. In this case, the horizontally polarized wave radiating element 10a and the horizontally polarized wave radiating element 10b are spaced apart from the outer surface of the rear lid by a distance d as shown in FIG.

  Electrical wiring between the horizontally polarized radiation element 10a and the horizontally polarized radiation element 10b fixed to the first fitting portion 13b and the second fitting portion 13c is introduced into the main body portion 13a. 13a is electrically connected to the balanced terminal of the balanced / unbalanced converter. A coaxial connector 15 is provided on the rear cover attached to the rear surface of the main body 13a. The coaxial connector 15 is electrically connected to an unbalanced terminal of a balanced / unbalanced converter housed in the main body 13a. Thus, the received signal received by the horizontally polarized radiation element 10a and the horizontally polarized radiation element 10b is transmitted by the coaxial cable of the coaxial plug attached to the coaxial connector 15 which is an unbalanced terminal. Become.

10 to 13 show the configurations of the vertically polarized wave feeding unit 23 and the vertically polarized wave radiating element 20 in the dual-polarization Yagi antenna 1 of the present invention. FIG. 10 is a perspective view showing the configuration of the vertically polarized wave feeding unit 23 and the vertically polarized wave radiating element 20, and FIG. 11 is a bottom view showing the configuration of the vertically polarized wave feeding unit 23 and the vertically polarized wave radiating element 20. FIG. 12 is a front view showing the configuration of the vertically polarized wave feeding unit 23 and the vertically polarized wave radiating element 20, and FIG. 13 is a view of the vertically polarized wave feeding unit 23 and the vertically polarized wave radiating element 20. It is a side view which shows a structure.
The vertically polarized wave power supply unit 23 shown in these drawings has a storage space for storing a balanced / unbalanced converter therein, and the storage space includes a main body 23a in the form of a prismatic pipe, It is formed by a front lid and a rear lid that close the opened front and rear surfaces of the main body 23a. The front lid and the rear lid are attached to the main body 23a by three attachment screws 23f inserted through both the upper center and the lower sides. From the lower part of the main body part 23a, two of a first fitting part 23b and a second fitting part 23c are formed to protrude to the front side. The first fitting portion 23b and the second fitting portion 23c are notched, and a semicircular groove portion 23g is formed on the lower surface of the main body portion 23a. The inner diameter of the semicircular groove portion 23g is substantially the same as the outer diameter of the arm 2, and a positioning convex portion 23d and a screw hole 23e are arranged in front and rear at the top of the semicircular groove portion 23g. It is formed with.

  An insertion hole having a circular cross section is formed in the first fitting portion 23b and the second fitting portion 23c in the direction orthogonal to the arm 2, and the bottom surface is closed. The inner diameter of the insertion hole is substantially equal to the outer diameter of the vertically polarized radiation elements 20a and 20b. One end of the vertically polarized radiating element 20a is inserted into the insertion hole of the first fitting portion 23b, and the other half-folded portion is inserted into the insertion hole of the second fitting portion 23c. The end of the vertically polarized radiation element 20b is inserted. Then, a screw is screwed into the insertion hole 13h formed on the front side of the first fitting portion 23b and the second fitting portion 23c, so that the first fitting portion 23b and the second fitting portion 23c are dipoled. The vertically polarized radiating element 20a and the vertically polarized radiating element 20b constituting the element are fixed to each other. In this case, the vertically polarized radiating element 20a and the vertically polarized radiating element 20b are spaced apart from the outer surface of the front lid to the front side by a distance d as shown in FIG.

  Electrical wiring between the vertically polarized radiation element 20a and the vertically polarized radiation element 20b fixed to the first fitting part 23b and the second fitting part 23c is introduced into the main body part 23a. In 23a, it is electrically connected to the balanced terminal of the balanced / unbalanced converter. A coaxial cover 25 is provided on the rear cover attached to the rear surface of the main body 23a. The coaxial connector 25 is electrically connected to an unbalanced terminal of a balanced / unbalanced converter housed in the main body 23a. Thus, the received signal received by the vertically polarized radiation element 20a and the vertically polarized radiation element 20b is transmitted by the coaxial cable of the coaxial plug attached to the coaxial connector 25 which is an unbalanced terminal. Become.

Next, a first procedure to a fourth procedure for assembling a feeding section in the polarization-sharing Yagi antenna 1 of the present invention are shown in FIGS. FIG. 14 is a perspective view showing a first procedure for assembling the feeding section in the dual-polarization Yagi antenna 1, and FIG. 15 is a perspective view showing a second procedure for assembling the feeding section in the dual-polarization Yagi antenna 1. FIG. 16 is a perspective view showing a third procedure for assembling the power feeding unit in the polarization sharing Yagi antenna 1, and FIG. 17 is a perspective view showing a fourth procedure for assembling the feeding unit in the polarization sharing Yagi antenna 1. FIG. However, in FIG. 14 to FIG. 17, only a part of the arm 2 where the radiating element and the feeding portion of the polarization-shared Yagi type antenna 1 are arranged is shown, and the waveguide element and the reflecting element are omitted. Yes.
As shown in these drawings, in order to assemble the feeding portion in the polarization-shared Yagi antenna 1, first, the convex portion 13d and the screw hole 13e formed in the semicircular groove portion 13g of the horizontal polarization feeding portion 13 are used. 14 is arranged on the arm 2 as shown in FIG. 14 so as to face the insertion hole 3a and the mounting screw 4a provided in the arm 2. In this case, the fitting hole 3a and the mounting screw 4a provided in the arm 2 are provided in a horizontal plane in which the horizontal polarization waveguide element 11 and the horizontal polarization reflection element 12 are disposed. Next, when the horizontal polarization power supply unit 13 is brought into contact with the arm 2 so that the convex portion 13d is inserted into the insertion hole 3a of the arm 2, the horizontal polarization power supply unit 13 is positioned on the arm 2, and then The mounting screw 4a is screwed into the screw hole 13e. As a result, the state shown in FIG. When the horizontally polarized wave feeding unit 13 is fixed to the arm 2, the horizontally polarized wave radiating elements 10 a and 10 b are arranged with the horizontally polarized wave waveguide element 11 and the horizontally polarized wave reflecting element 12. It will be arranged in the horizontal plane.

Subsequently, the convex portion 23d and the screw hole 23e formed in the semicircular groove portion 23g of the vertical polarization feeding portion 23 are opposed to the fitting hole 3b and the mounting screw 4b (not shown) provided in the arm 2. In addition, the vertically polarized power supply unit 23 is arranged with respect to the arm 2 as shown in FIG. In this case, the fitting hole 3b and the mounting screw 4b provided in the arm 2 are provided in a vertical plane on which the vertical polarization waveguide element 21 and the vertical polarization reflection element 22 are arranged. Next, when the vertical polarization power supply unit 23 is brought into contact with the arm 2 so that the convex portion 23d is inserted into the insertion hole 3b of the arm 2, the vertical polarization power supply unit 23 is positioned on the arm 2, and then, The mounting screw 4b is screwed into the screw hole 23e. As a result, the state shown in FIG. 17 is obtained, and the vertically polarized power feeder 23 can be fixed to the arm 2. The fitting hole 3b and the mounting screw 4b are provided in the arm 2 perpendicular to the fitting hole 3a and the mounting screw 4a, and when the vertically polarized power feeding portion 23 is fixed to the arm 2, The vertically polarized radiation elements 20a and 20b are arranged in a horizontal plane in which the vertically polarized wave waveguide element 21 and the vertically polarized wave reflecting element 22 are arranged.
In the horizontal polarization feeding section 13, the horizontal polarization radiating element 10a and the horizontal polarization radiating element 10b are spaced apart from the outer surface of the rear lid to the rear surface side by a distance d as shown in FIG. Has been. On the other hand, in the vertically polarized wave feeding unit 23, the vertically polarized wave radiating element 20a and the vertically polarized wave radiating element 20b are separated from the outer surface of the front cover toward the front side by a distance d as shown in FIG. Are arranged. Thus, as shown in FIG. 17, when the horizontal polarization feed unit 13 and the vertical polarization feed unit 23 are attached to the arm 2, the central axes of the horizontal polarization radiation elements 10a and 10b and the vertical polarization radiation are obtained. The central axes of the elements 20 a and 20 b intersect with the central axis of the arm 2. That is, the horizontally polarized radiation elements 10 a and 10 b and the vertically polarized radiation elements 20 a and 20 b are arranged in a vertical plane orthogonal to the central axis of the arm 2.

As described above, the horizontal polarization radiating element 10 and the vertical polarization radiating element 20 can be easily assembled to the arm 2 by screwing only one screw, respectively. Horizontally polarized wave Yagi antenna comprising a horizontally polarized wave radiating element 11, a horizontally polarized wave radiating element 10, and a horizontally polarized wave reflecting element 12, and a plurality of vertically polarized wave waveguide elements 21, and a vertically polarized wave The vertically polarized Yagi antenna including the wave radiating element 20 and the vertically polarized reflecting element 22 can be easily assembled. Further, since the reverse procedure of assembly may be performed when disassembling, the dual-polarization Yagi antenna 1 of the present invention can be easily disassembled and assembled.
When packing the dual-polarization Yagi antenna 1 of the present invention, a plurality of vertical polarization waveguide elements 21 and vertical polarization reflection elements 22 are combined into a plurality of horizontal polarization waveguides. The horizontal polarization radiating element 10 and the vertical polarization radiating element are arranged from the arm 2 by loosening only one screw while being arranged in a horizontal plane where the element 11 and the horizontal polarization reflecting element 12 are arranged. Remove 20 and pack. In this case, it is possible to pack with a remarkably small volume as compared with the case where the horizontally polarized Yagi antenna and the vertically polarized Yagi antenna are mounted orthogonally.

  In the dual-polarization Yagi antenna 1 of the present invention, a plurality of horizontal polarization waveguide elements 11, a horizontal polarization radiation element 10, and a horizontal polarization reflection element 12 that constitute a horizontal polarization Yagi antenna. Are mounted in a horizontal plane substantially including the central axis of the arm 2, and a plurality of vertically polarized waveguide elements 21 constituting a vertically polarized Yagi antenna, a vertically polarized radiation element 20, and a vertical The polarization reflection element 22 is attached in a vertical plane including substantially the central axis of the arm 2 orthogonal to the horizontal plane. That is, the central axes of the horizontally polarized Yagi antenna and the vertically polarized Yagi antenna substantially coincide with each other and are orthogonally fixed to the arm 2. Further, the central axes of the horizontal polarization waveguide element 11, the horizontal polarization radiation element 10, and the horizontal polarization reflection element 12 are the vertical polarization waveguide element 21, the vertical polarization radiation element 20, The central axis of each of the vertically polarized reflection elements 22 intersects the substantially central axis of the arm 2. As a result, the cross polarization discrimination degree in the dual-polarization Yagi-type antenna 1 of the present invention is a good cross polarization discrimination degree.

In the polarization shared Yagi-type antenna according to the present invention described above, the number of horizontally polarized wave waveguide elements and vertically polarized wave waveguide elements can be any number of waveguide elements of one or more. . Further, the horizontal polarization reflection element and the vertical polarization reflection element may be any number of reflection elements of one or more.
In addition, the dual-polarization Yagi antenna according to the present invention uses the same frequency band for vertically polarized waves and horizontally polarized waves. However, the present invention is not limited to this. The present invention can be used in a communication system that performs spatial multiplexing communication using both waves and horizontally polarized waves and in the broadcasting business field.

DESCRIPTION OF SYMBOLS 1 Polarization shared Yagi-type antenna, 2 arms, 3a insertion hole, 3b insertion hole, 4a mounting screw, 4b mounting screw, 10 Horizontal polarization radiation element, 10a, 10b Horizontal polarization radiation element, 11 Horizontal polarization Waveguide element, 11a, 11b, 11c Horizontal polarization waveguide element, 12 Horizontal polarization reflection element, 13 Horizontal polarization feed section, 13a Main body section, 13b First fitting section, 13c Second fitting section , 13d Projection, 13e Screw hole, 13f Mounting screw, 13g Semicircular groove, 13h Insertion hole, 15 Coaxial connector, 20 Vertical polarization radiating element, 20a, 20b Vertical polarization radiating element, 21 Vertical polarization Waveguide element, 21b1, 21b2 Vertical polarization waveguide element, 22 Vertical polarization reflection element, 23 Vertical polarization feed part, 23a Main body part, 23b First fitting part, 23c Second fitting part, 23d Convex , 23e screw hole, 23f mounting screw, 23g semicircular groove, 24 element attachment, 25 coaxial connector, 25a screw, 25a, 25b screw, 26a, 26b insertion hole, 30 first element attachment, 30a first holding Part, 30b second holding part, 30c saddle part, 30d element insertion hole, 30e first insertion hole, 30f second insertion hole, 30g bending part, 31 second element attachment tool, 31a first holding part, 31b 2nd holding part, 31e screw hole, 31f screw hole, 101 polarization shared Yagi type antenna, 110 horizontal polarization side radiation element, 110a, 110b radiation element, 110b radiation element, 111 horizontal polarization side waveguide element, 111a , 111b Waveguide element, 112 Horizontal polarization side reflection element, 112a, 112b Reflection element, 112c, 112d Screw part, 112c, 112d, 116c , 116d Thread portion, 112e, 112g Nut, 114 Vertical polarization side radiation element, 114a, 114b Radiation element, 115 Vertical polarization side waveguide element, 115a, 115b Waveguide element, 116 Vertical polarization side reflection element, 116a, 116b Reflective element, 116c, 116d Threaded portion, 116e, 116g Nut, 118 arm, 118a First arm, 118b Second arm, 119 Shielded cylinder, 120a, 120b Fixing bracket, 121a, 121b Fixing bracket, 140, 141 Coaxial cable 140a inner conductor, 140b outer conductor, 141a inner conductor, 141b outer conductor, 142 branch conductor, 142b outer conductor, 143 branch conductor, 143b outer conductor, 144 short-circuit plate, 145 short-circuit plate, 150 inner ring, 151a bush, 152a , 152b, 152c, 152d Boss, 153 External ring

Claims (2)

At least one first waveguide element disposed on a first plane including a substantially central axis of the arm and fixed to the arm;
A first radiating element disposed on the first plane and detachably fixed to the arm adjacent to the rear of the first waveguide element;
At least one first reflective element disposed on the first plane and secured to the arm adjacent to the rear of the first radiating element;
A first Yagi antenna composed of the first waveguide element, the first radiating element, and the first reflecting element disposed on the first plane;
The number of second waveguide elements equal to the number of the first waveguide elements sandwiched by the waveguide element fixtures that hold the arms between the half-finished ends,
A second radiating element disposed on a second plane orthogonal to the first plane and including substantially the central axis of the arm, and detachably fixed to the arm adjacent to the rear of the second waveguide element When,
The same number of first reflective elements as the number of the first reflective elements disposed between the rear ends of the second radiating elements are sandwiched by the reflective element fixtures that hold the arms between the half-finished ends. Two reflective elements;
A second Yagi antenna comprising the second waveguide element, the second radiating element, and the second reflecting element;
The waveguide element attachment and the reflection element attachment are configured by arranging two element attachments facing each other, and the element attachment has an arc shape in which an element insertion groove is formed at substantially the center. And two semi-circular holding parts formed on both sides of the saddle part, so that the arm is held between the facing saddle parts. When the fixture faces and is fixed to the arm, the end portion of the second waveguide element or the second reflection element half-turned is between the holding portions where the two element fixtures face each other. Sandwiched between and fixed,
The second waveguide is moved by moving the waveguide element fixture to which the second waveguide element is fixed and press-fitting the first waveguide element fixed to the arm into the element insertion groove. An element is disposed on the second plane, and the reflection element fixture to which the second reflection element is fixed is moved to press-fit the first reflection element fixed to the arm into the insertion groove. Thus, the second reflection element is disposed on the second plane, the waveguide element fixture to which the second waveguide element is fixed, and the reflection element attachment to which the second reflection element is fixed, The dual-polarization Yagi antenna, wherein the second waveguide element and the second reflection element can be arranged on the first plane by rotating with respect to the arm.   2. The state in which the second waveguide element and the second reflection element are arranged on the first plane and at least the second radiation element is removed from the arm is a packaged state. The Yagi-type antenna with dual polarization described.

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