JP2016029858A - Method for providing antenna device and antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: an antenna device which is easy to transport and assemble, and enables the suppression the reduction in gain; and a method for providing such an antenna device.SOLUTION: Provided are an antenna device and a providing method thereof. The method comprises the steps of: disposing a main columnar conductor over a conductor ground plate between first and second sub-columnar conductors so that it is insulated from the conductor ground plate; fixing the first and second sub-columnar conductors to the main columnar conductor; putting first and second upper dielectric spacers on leading ends of the first and the second sub-columnar conductors respectively; fixing two ends of a U-shaped conductor to the first and second upper dielectric spacers; fixing a center portion of the U-shaped conductor to a leading end of the main columnar conductor; and electrically connecting a power-supply part to the main columnar conductor by one wiring line and to the conductor ground plate by the other wiring line.SELECTED DRAWING: Figure 14

Description

  The present invention relates to an antenna device installation method and an antenna device that are relatively easy to install.

  Conventionally, there is an antenna device using a dipole antenna (for example, see Patent Document 1). In addition to the self-supporting type like the antenna device described in Patent Document 1, there is also a device that fixes an antenna element by a branch line (see, for example, Patent Document 2). The antenna device described in Patent Document 1 uses a monopole antenna.

  Generally, in order to construct a high-gain dipole antenna, an antenna length of about a half wavelength of a radio wave to be used is required, and in order to configure a monopole antenna, an antenna length of about a quarter wavelength is required. . When the frequency of the radio wave to be used is relatively low, the antenna length becomes several meters, so that the assembly (installation) of the antenna device and the introduction of the members become complicated. In consideration of securing wind resistance and earthquake resistance for a very long antenna element, as shown in Patent Document 2, it is necessary to fix to a foundation using a number of support members such as branch lines.

  In order to avoid an increase in the area required for installation of the antenna device and an increase in member costs and equipment maintenance costs, an antenna having a high gain and a small size that does not require many support members is required. As a technique for suppressing a decrease in gain and reducing the size of a linear antenna, a technique of bending an exciter portion is generally known (see, for example, Patent Document 3 and Patent Document 4). According to this method, it is possible to simultaneously ensure the electrical length of the exciter unit necessary for maintaining the gain and reduce the size.

JP 2007-158762 A (all figures) JP 2003-188632 A (FIGS. 1 and 13) JP-A-3-3503 (FIG. 1) JP-A-6-90108 (FIG. 1)

  However, in a large linear antenna device using a relatively low frequency band, the antenna can be miniaturized by bending the exciter portion of the linear antenna. It is necessary to ensure the full length of the exciter. Therefore, for example, if the size in the vertical direction is reduced, the size in the horizontal direction is inevitably increased. Therefore, the size and mass of the exciter part are not greatly reduced by simply bending the exciter part, and the size is set outdoors. In some cases, there was a problem that measures against wind and the like were necessary.

  On the other hand, when measures are taken by thinning the structure of the antenna body or by using a multi-stage structure, it is difficult to secure strength and rigidity against vibration caused by wind if further weight reduction or a large number of support members cannot be provided. There were also challenges.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an antenna device installation method and an antenna device which suppresses gain reduction and is easy to carry and assemble.

  In the antenna device installation method according to the first aspect of the present invention, the first sub-columnar conductor, the second sub-columnar conductor, and the main columnar conductor are erected on the conductor ground plane that constitutes the ground surface, respectively. A lower-side columnar conductor installation step of disposing the main columnar conductor between the first subcolumnar conductor and the second subcolumnar conductor; and the first subcolumnar conductor and the second subcolumnar conductor as the main columnar conductor. A lower-side columnar conductor electrical connection step fixed to the first sub-columnar conductor, a first upper dielectric spacer placed on the tip portion of the first sub-columnar conductor, and a second upper dielectric spacer placed on the tip portion of the second sub-columnar conductor The upper dielectric spacer mounting step for mounting, and a U-shape bent in a U-shape on the surface opposite to the surface mounted on the tip portion of the first sub-columnar conductor of the first upper dielectric spacer One end of the conductor And fixing the other end of the U-shaped conductor to the surface opposite to the surface of the second upper dielectric spacer placed on the tip of the second sub-columnar conductor, A U-shaped conductor fixing step for fixing the central portion to the tip end portion of the main columnar conductor, and the power feeding portion is electrically connected to the main columnar conductor with one wiring and electrically connected to the conductor ground plane with the other wiring. And a wiring process for connection.

  According to a second aspect of the present invention, there is provided an antenna device comprising: a first sub-columnar conductor formed on a conductor ground plane constituting a ground plane and insulated from the conductor ground plane; and the first sub-columnar conductor arranged on the conductor ground plane. And the second sub-columnar conductor arranged insulated from the conductor ground plane, and the first sub-columnar conductor and the second sub-columnar conductor on the conductor ground plane are insulated and arranged from the conductor ground plane, A main columnar conductor having a lower portion and a lower portion fixed to each of the first sub-columnar conductor and the second subcolumnar conductor, and one wiring is electrically connected to the main columnar conductor, and the other wiring is connected to the conductor ground plane. An electrically connected power supply portion, bent in a U-shape, one end is opposed to the tip portion of the first sub-columnar conductor, and the other end is opposed to the tip portion of the second sub-columnar conductor; The main columnar conductor It is characterized in that a U-shaped conductor fixed to the tip portion.

  As described above, according to the present invention, the first sub columnar conductor (first support) and the second sub columnar conductor (second support) arranged side by side with the first sub columnar conductor (first support). And a main columnar conductor (first main columnar conductor) arranged between the first sub columnar conductor (first support) and the second subcolumnar conductor (second support), and a U-shape. , One end is opposed to the tip portion of the first sub-columnar conductor (first support), the other end is opposed to the tip portion of the second sub-columnar conductor (second support), and the central portion is the main columnar conductor (first Since the antenna device includes a U-shaped conductor fixed to the tip portion of (2 main columnar conductors) and the installation method of the antenna device, the following effects are obtained.

  According to the invention which concerns on Claim 1, the installation method of the simple antenna apparatus which can pile up the support body containing a spacer and the antenna element of a monopole antenna can be obtained.

  According to the invention which concerns on Claim 2, the antenna apparatus which piled up the support body containing a spacer and the antenna element of a monopole antenna can be obtained.

It is a front view of the antenna apparatus which concerns on Embodiment 1 of this invention. It is a rear view of the antenna apparatus which concerns on Embodiment 1 of this invention. It is a top view of the antenna apparatus which concerns on Embodiment 1 of this invention. It is a bottom view of the antenna apparatus which concerns on Embodiment 1 of this invention. It is a left view of the antenna device which concerns on Embodiment 1 of this invention. It is a right view of the antenna device which concerns on Embodiment 1 of this invention. 1 is a schematic diagram of an antenna device according to Embodiment 1 of the present invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 1 of this invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 1 of this invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 1 of this invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 1 of this invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 1 of this invention. It is an assembly procedure figure of the installation method of the antenna apparatus which concerns on Embodiment 1 of this invention. It is a front view of the antenna apparatus which concerns on Embodiment 2 of this invention. It is a front view (with reinforcement) of the antenna device which concerns on Embodiment 2 of this invention. It is a schematic diagram of the antenna apparatus which concerns on Embodiment 2 of this invention. It is a schematic diagram of the antenna apparatus which concerns on Embodiment 3 of this invention. It is a left view of the antenna device which concerns on Embodiment 3 of this invention. It is a right view of the antenna apparatus which concerns on Embodiment 3 of this invention. It is explanatory drawing of the assembly procedure of the installation method of the antenna device which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 7A is a schematic diagram illustrating a current path of the antenna device, and FIG. 7B is a diagram illustrating a correspondence relationship between the schematic diagram illustrated in FIG. 7B and the reference numerals of the antenna device according to the first embodiment. is there. 7 can be said to schematically show the antenna device shown in FIG. 12 (b) is a front view of the antenna device, and FIG. 12 (a) is an enlarged sectional view of a dotted line portion in the front view of the antenna device shown in FIG. 12 (b) (in the direction of viewing the plan view shown in FIG. 2). The columnar conductor and the U-shaped conductor are divided into two, in other words, the columnar conductor and the U-shaped conductor are divided into two in the direction in which the columnar conductor and the U-shaped conductor extend. In addition, the installation surface of the antenna device according to Embodiment 1 is assumed to be the ground or the rooftop of a building. The structure of the present invention described in the embodiment is an example, and the present invention is not limited only to the structure shown in the embodiment.

  1 to 13, the first main columnar conductor 1 is arranged between the second sub-columnar conductor 3 and the first sub-columnar conductor 2 arranged in the first sub-columnar conductor 2 (intermediate). Yes. That is, the first main columnar conductor 1 is disposed between the first sub columnar conductor 2 and the second sub columnar conductor 3. The first main columnar conductor 1 is electrically connected to the first sub columnar conductor 2 and the second sub columnar conductor 3. The second main columnar conductors 4 are arranged in series (linearly) so as to face the first main columnar conductors 1 with the central upper dielectric spacer 5 interposed therebetween. The central upper dielectric spacer 5 is placed at the tip of the first main columnar conductor 1. The power feeding unit (feeding point) 6 is electrically connected to the first main columnar conductor 1 and the second main columnar conductor. The U-shaped conductor 7 is bent in a U-shape, one end is opposed to the tip portion of the first sub-columnar conductor 2, the other end is opposed to the tip portion of the second sub-columnar conductor 3, and the central portion 7c is 2 It is fixed to the tip portion of the main columnar conductor 4. Specifically, since the second main columnar conductor 4 fixes the vicinity of the center of the central portion 7c, the U-shaped conductor 7 has a line-symmetric structure with respect to a line passing through the vicinity of the center. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 13, the second main columnar conductor 4 includes a first plate-like conductor (upper flange) 4 a formed at the tip portion and a second plate-like conductor 4 b (on the first plate-like conductor 4 a ( The center portion 7c of the U-shaped conductor 7 is sandwiched and fixed between the first plate-like conductor 4a and the second plate-like conductor 4b. Since the second plate-like conductor 4 b is a member different from the second main columnar conductor 4, the second plate-like conductor 4 b becomes a part of the second main columnar conductor 4 after the U-shaped conductor 7 is fixed. . Further, at least one of the first plate-like conductor 4a or the second plate-like conductor 4b may have a groove portion into which the U-shaped conductor 7 is inserted. In the present application, the second plate-like conductor 4b is illustrated with a groove portion into which the U-shaped conductor 7 is inserted. Of course, the second plate-like conductor 4b may be eliminated and only the first plate-like conductor 4a (upper flange 4a) may be structured. In this case, the U-shaped conductor 7 can be easily held by forming a groove in which the U-shaped conductor 7 is inserted in the first plate-shaped conductor 4a (upper flange 4a). The U-shaped conductor 7 includes a first linear portion that extends linearly from one end to the first bent portion 7a, a second linear portion that extends linearly from the other end to the second bent portion 7b, and a first The center portion 7c extends linearly from the bent portion 7a to the second bent portion 7b. In the present application, the first bent portion 7a and the second bent portion 7b include those bent at an angle of 90 °. In other words, the U-shaped conductor 7 can also be said to be a U-shaped conductor 7 (П-shaped conductor 7). In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 13, the central lower dielectric spacer 8 is placed on the installation surface. The first lower dielectric spacer 9 and the second lower dielectric spacer 10 are respectively placed on the installation surface, and the central lower dielectric spacer 8 is disposed in the middle (intermediate). The first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 may be integral dielectric spacers. Further, it may be embedded in the installation surface, or the installation surface itself may have this function (dielectric spacer). The first connection conductor 11 is for electrically connecting the first sub columnar conductor 2 and the first main columnar conductor 1. The second connection conductor 12 is for electrically connecting the second sub columnar conductor 3 and the first main columnar conductor 1. The first connection conductor 11 and the second connection conductor 12 have the same length. The first connection conductor 11 and the second connection conductor 12 can also function as standing reinforcements for the first main columnar conductor 1, the first sub columnar conductor 2, and the second sub columnar conductor 3. The first upper dielectric spacer 13 is formed at the tip of the first sub-columnar conductor 2. The second upper dielectric spacer 14 is formed at the tip portion of the second sub-columnar conductor 3. The first upper dielectric spacer 13 and the second upper dielectric spacer 14 have, for example, a thin conical shape on the upper side. In the drawings of the present application, a portion having the same diameter at the lower portion of the inclined portion having a slope shape is shown (particularly, FIG. 12A). In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  The structure of the antenna device according to Embodiment 1 will be described. The antenna device according to Embodiment 1 is a dipole antenna. As shown in FIGS. 1 to 6, one antenna element (exciter part (metal part)) of the dipole antenna has a proximal end portion fixed to a central lower dielectric spacer 8 placed on the installation surface, and stands upright. Of the first lower dielectric spacer 9 and the second lower dielectric spacer 10 which are placed on the installation surface of the first main pillar-shaped conductor 1 and are disposed with the central lower dielectric spacer 8 therebetween, the first lower dielectric spacer 9 is composed of three columnar conductors, a first sub-columnar conductor 2 standing upright and a second sub-columnar conductor 3 standing upright and second sub-columnar conductor 3 standing upright. (Lower antenna element, one antenna element). These three columnar conductors are arranged in the vicinity of the central lower dielectric spacer 8, the first lower dielectric spacer 9, and the second lower dielectric spacer 10 by the first connecting conductor 11 and the second connecting conductor 12, as described above. Are electrically connected.

  The other antenna element (exciter part (metal part)) of the dipole antenna of the antenna device according to Embodiment 1 is the first main columnar conductor 1 of the central upper dielectric spacer 5, as shown in FIGS. The base end portion is fixed to the surface opposite to the surface placed on the front end portion of the, and the second main columnar conductor 6 standing upright is bent into a U shape, and one end is fixed to the first upper dielectric spacer 13. The other end is fixed to the second upper dielectric spacer 14, and the central portion 7c is composed of two columnar conductors with the U-shaped conductor 7 fixed to the tip portion of the second main columnar conductor 4 ( Upper antenna element, other antenna element). In the present application, the second main columnar conductor 4 includes two members, that is, an upper side second main columnar conductor 4u in which the first plate-like conductor 4a is formed and a lower side second main columnar conductor 4d in which the feeding portion 6 is built. Is shown. The power feeding unit 6 is electrically connected to the first main columnar conductor 1 and the second main columnar conductor 4. For example, the outer conductor of the coaxial line disposed in the power feeding unit 6 is electrically connected to the first main columnar conductor 1, and the central conductor of the coaxial line disposed in the power feeding unit 6 is electrically connected to the second main columnar conductor 4. Connect to. As an example of connection, the thing of the above-mentioned patent document 1 is mentioned (especially FIGS. 2-7 of patent document 1).

  In the present application, an example in which the power feeding unit 6 is built in the lower second main columnar conductor 4d side of the second main columnar conductor 4 is illustrated. Therefore, the members are arranged (fixed) in the order of the first main columnar conductor 1, the center upper dielectric spacer 5, the lower second main columnar conductor 4d, and the upper second main columnar conductor 4u from the center lower dielectric spacer 8 side. ) Of course, the power feeding unit 6 may be wired from the outside of the first main columnar conductor 1 and the second main columnar conductor 4 (for example, a coaxial line), or may be incorporated in the first main columnar conductor 1. When the power feeding unit 6 is built in the first main columnar conductor 1, the first main columnar conductor 1 is the upper first first column in which the lower first main columnar conductor on the center lower dielectric spacer 8 side and the power feeding unit 6 are built. It is good to comprise from two members with a main columnar conductor. In this case, the members are arranged (fixed) in the order of the lower first main columnar conductor, the upper first main columnar conductor, the upper central dielectric spacer 5 and the second main columnar conductor 4 from the center lower dielectric spacer 8 side. Will be. In this case, the second main columnar conductor 4 may be a single columnar conductor.

  In the antenna device according to the first embodiment, the first sub columnar conductor 2, the second sub columnar conductor 3, the first main columnar conductor 1, the second main columnar conductor 4, and the U-shaped conductor 7 are a hollow conductor rod. By using (metal bar, metal pipe), weight reduction can be achieved. The first sub-columnar conductor 2, the second sub-columnar conductor 3, the first main columnar conductor 1, the second main columnar conductor 4, and the U-shaped conductor 7 are hollow metal rods and constitute an exciter of a dipole antenna. It can be said that.

  Further, the first sub columnar conductor 2, the second sub columnar conductor 3, the first main columnar conductor 1, and the second main columnar conductor 4 that greatly contribute to the independence of the antenna device according to the first embodiment or the independence by supporting the branch line Differently, the U-shaped conductor 7 is supported by the second main columnar conductor 4. Therefore, the U-shaped conductor 7 can have a smaller diameter than the first sub columnar conductor 2, the second sub columnar conductor 3, the first main columnar conductor 1, and the second main columnar conductor 4. Moreover, it is good also as a small diameter and lightweight. The first bent portion 7a and the second bent portion 7b of the U-shaped conductor 7 (the portion facing the installation surface) are interposed via the first upper dielectric spacer 13 and the second upper dielectric spacer 14. Thus, it can be said that the first sub columnar conductor 2 and the second sub columnar conductor 3 are also supported.

  Similarly, the first sub columnar conductor 2, the second sub columnar conductor 3, the first main columnar conductor 1, and the second main columnar conductor 4 that greatly contribute to the independence of the antenna device according to the first embodiment or the independence by supporting the branch line In contrast, the first connection conductor 11 and the second connection conductor 12 can have a smaller diameter than the first sub columnar conductor 2, the second sub columnar conductor 3, the first main columnar conductor 1, and the second main columnar conductor 4. . Moreover, it is good also as a small diameter and lightweight. The first connection conductor 11 and the second connection conductor 12 may be hollow. However, the first connection conductor 11 and the second connection conductor 12 also include the purpose of maintaining the distance relationship (positional relationship) between the first sub columnar conductor 2 and the second sub columnar conductor 3 and the first main columnar conductor 1. When it is used, a certain level of strength is required.

  The structure of the antenna device according to Embodiment 1 will be described in more detail. As shown in FIGS. 1-6, the 1st main columnar conductor 1 has a lower flange in a base end part, and has an upper flange in a front-end | tip part. The upper side second main columnar conductor 4u has a lower flange at the proximal end portion and an upper flange 4a at the distal end portion. The lower second main columnar conductor 4d has a lower flange at the proximal end portion and an upper flange at the distal end portion. The first sub-columnar conductor 2 has a lower flange at the base end portion and a placement portion (upper flange) on which the first upper dielectric spacer 13 can be placed at the distal end portion. The second sub-columnar conductor 3 has a lower flange at the base end portion, and a mounting portion (upper flange) on which the second upper dielectric spacer 14 can be mounted at the distal end portion. The first upper dielectric spacer 13 is formed with a hole (dent) into which one end of the U-shaped conductor 7 is inserted on the surface opposite to the surface placed on the tip portion of the first sub-columnar conductor 2. . The second upper dielectric spacer 14 is formed with a hole (dent) into which the other end of the U-shaped conductor 7 is inserted on the surface opposite to the surface placed on the tip portion of the second sub-columnar conductor 3. Yes.

As shown in FIGS. 1 to 6, in the second main columnar conductor 4, the lower flange of the upper second main columnar conductor 4u and the upper flange of the lower second main columnar conductor 4d are directly connected with fasteners such as bolts. It is fixed. The upper flange 4a of the upper second main columnar conductor 4u and the U-shaped conductor 7 are connected by a mounting bracket 4b. The upper flange 4a (first plate-like conductor) and the mounting bracket 4b (second plate-like conductor) are fixed with a fastener such as a bolt. The center upper dielectric spacer 5, the center lower dielectric spacer 8, the first lower dielectric spacer 9, and the second lower dielectric spacer 10 are hollow dielectrics (dielectric spacers). The center upper dielectric spacer 5 fixes the upper flange of the first main columnar conductor 1 and the lower flange of the lower second main columnar conductor 4d without conducting them. The upper flange of the first main columnar conductor 1 and the lower flange of the lower second main columnar conductor 4d are respectively fixed to the opposing surfaces of the central upper dielectric spacer 5 with fasteners such as bolts. The lower flange of the first main columnar conductor 1 is fixed to the opposing surface of the central lower dielectric spacer 8 with a fastener such as a bolt. Similarly, the lower flanges of the first sub-columnar conductor 2 and the second sub-columnar conductor 3 are fixed to the opposing surfaces of the first lower dielectric spacer 9 and the second lower dielectric spacer 10 with fasteners such as bolts, respectively. Has been.

  As described above, the lower flanges of the first main columnar conductor 1, the first sub columnar conductor 2, and the second sub columnar conductor 3 are fasteners such as bolts, respectively, and the center lower dielectric spacer 8 and the first lower dielectric The body spacer 9 and the second lower dielectric spacer 10 are fixed. The first connection conductor 11 is formed between the lower flanges of the first main columnar conductor 1 and the first sub columnar conductor 2, and is a fastener such as a bolt, and the first main columnar conductor 1 and the first sub columnar conductor 2. It is fixed to the lower flange. The second connection conductor 12 is formed between the lower flanges of the first main columnar conductor 1 and the second sub columnar conductor 3, and is a fastener such as a bolt, and the first main columnar conductor 1 and the second sub columnar conductor 3. It is fixed to the lower flange. The first upper dielectric spacer 13 is fixed at a constant distance without conducting between the upper flange (mounting portion) of the first sub-columnar conductor 2 and one end of the U-shaped conductor 7. The second upper dielectric spacer 14 is fixed to the upper flange (mounting portion) of the second sub-columnar conductor 3 and the other end of the U-shaped conductor 7 while maintaining a certain distance without conducting. .

  If such a structure is adopted, the antenna device according to the first embodiment is not only a simple structure but also an antenna device that realizes a low profile can be easily obtained, and the installation surface can be formed with fewer branch lines. An antenna device that can stand up or an antenna device that can stand by itself without using a branch line can be easily obtained.

  Next, the operation and miniaturization of the antenna device according to Embodiment 1 will be described with reference to FIG. 7 (a) and 7 (b) correspond to the front view (FIG. 1) of the antenna device according to Embodiment 1, and schematically show the exciter part (metal part, antenna element) and the feeding point 6. FIG. It is a figure. By supplying power so as to generate a potential difference at both ends of the feeding point 6 of the antenna device, a current flows through a path indicated by a solid line arrow. Generally, in the dipole antenna, the gain decreases as the current path length becomes shorter than a quarter wavelength. Therefore, as in the antenna device according to the first embodiment, by bending the exciter unit, it is possible to reduce the size of the device while ensuring a current path length and suppressing a decrease in the gain of the antenna. FIG. 7B clearly shows the correspondence with the specific components of the antenna device described in FIGS. 1 to 6, and shows the components separated by dotted lines.

  Further, in FIG. 7, a current vector generated in the horizontal direction of the exciter at a certain moment is indicated by a broken-line arrow. The structure of the antenna device according to the first embodiment is such that the first main columnar conductor 1 is arranged between the first sub columnar conductor 2 and the second sub columnar conductor 3, and the second main columnar conductor 4 is fixed. The U-shaped conductor 7 has a line-symmetric structure with respect to a line passing near the center of the central portion 7c. That is, the structure of the antenna device according to the first embodiment is centered on the first main columnar conductor 1 and the second main columnar conductor 4 arranged in series (straight) via the central upper dielectric spacer 5. These current vectors always cancel each other right and left because they are symmetrical.

  Therefore, the structure of the antenna device according to Embodiment 1 can provide a small antenna device with a high gain with the vertical direction as the main polarization. With the structure of the antenna device according to the first embodiment, it is possible to obtain a dipole antenna in which the gain of the main polarization of the dipole antenna is maintained and the gain of the cross polarization is suppressed by using a symmetrical structure.

  Subsequently, an installation method (assembly procedure) of the antenna device according to Embodiment 1 will be described with reference to FIGS. FIG. 8 shows a lower dielectric spacer placing step of the antenna device installation method according to the first embodiment. In the lower dielectric spacer placing step, the first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 are placed on the installation surface. At this time, the first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 may be fixed to the installation surface, but the first sub-columnar conductor 2 and the second sub-columnar conductor 3 may be fixed. In addition, when the first main columnar conductor 1 is erected, the first sub columnar conductor 2, the second sub columnar conductor 3, and the first main columnar conductor 1 may be collectively fixed to the installation surface. Originally, if the first lower dielectric spacer 9, the second lower dielectric spacer 10 and the central lower dielectric spacer 8 are disposed (fixed) on the installation surface or if the installation surface has a function of the dielectric spacer, The lower dielectric spacer placing step is not necessary.

  FIG. 9 shows a lower columnar conductor installation step of the antenna device installation method according to the first embodiment. In the lower columnar conductor installation step, the first sub columnar conductor 2, the second sub columnar conductor 3, and the first main columnar conductor 1 are respectively erected on the installation surface, and the first sub columnar conductor 2 and the second sub columnar conductor are formed. The first main columnar conductor 1 is disposed between the conductor 3. If the antenna device installation method according to the first embodiment requires a lower dielectric spacer placement step, the first lower dielectric spacer 9 and the second lower dielectric spacer are provided before the lower columnar conductor placement step. 10 and a lower dielectric spacer mounting step for mounting the central lower dielectric spacer 8 on the installation surface is required. That is, in the lower columnar conductor installation step, the first sub columnar conductor 2 and the second subdielectric conductor 2 and the second lower dielectric spacer 9 and the second lower dielectric spacer 10 and the central lower dielectric spacer 8 placed on the installation surface are arranged. It can be said that the base column portions of the sub columnar conductor 3 and the first main columnar conductor 1 are fixed.

  FIG. 10 shows a lower columnar conductor electrical connection step of the antenna device installation method according to the first embodiment. In the lower columnar conductor electrical connection step, the first sub columnar conductor 2 and the second sub columnar conductor 3 are electrically connected to the first main columnar conductor 1. Specifically, the step of connecting the first main columnar conductor 1 and the first sub columnar conductor 2 with the first connection conductor 11 and the first main columnar conductor 1 and the second sub columnar conductor 3 are connected with the second connection conductor 12. Process. In addition, the implementation order of a lower side columnar conductor electrical connection process is not ask | required. It may be after the U-shaped conductor fixing step and the wiring step described later. Moreover, since the lower side columnar conductor electrical connection step can be said to be reinforcement by the first connection conductor 11 and the second connection conductor 12, it can also be said to be a lower side columnar conductor reinforcement step.

  FIG. 11 shows the upper columnar conductor installation step of the antenna device installation method according to the first embodiment. In this upper side columnar conductor installation step, the upper main columnar conductor 1 was placed (fixed) on the distal end portion of the first main columnar conductor 1 of the central upper dielectric spacer 5 placed (fixed) on the distal end portion of the first main columnar conductor 1. The base end portion of the second main columnar conductor 4 (the lower flange of the lower second main columnar conductor 4d) is fixed to the surface opposite to the surface to stand the second main columnar conductor 4. In addition, you may perform an upper side columnar conductor installation process before a lower side columnar conductor installation process. That is, in the lower columnar conductor installation step, the first main columnar conductor 1 to which the second main columnar conductor 4 is connected via the central upper dielectric spacer 5 is erected on the installation surface. Although not shown, an upper dielectric spacer placing step for placing (fixing) the central upper dielectric spacer 5 on the tip portion (upper flange) of the first main columnar conductor 1 before the upper side columnar conductor placing step. (Upper dielectric spacer mounting step for main columnar conductor) is performed.

  12 and 13 show the U-shaped conductor fixing step of the antenna device installation method according to the first embodiment. In this U-shaped conductor fixing step, the U-shaped conductor 7 bent in a U-shape is formed on the surface opposite to the surface mounted on the tip portion of the first sub-columnar conductor 2 of the first upper dielectric spacer 13. One end is fixed, and the other end of the U-shaped conductor 7 is fixed to the surface opposite to the surface placed on the tip portion of the second sub-columnar conductor 3 of the second upper dielectric spacer 14. 7 is fixed to the tip portion of the second main columnar conductor 4. In FIG. 12A, the first sub-columnar conductor 2, the second sub-columnar conductor 3, and the U-shaped conductor 7 are hollow. Similarly, in FIG. 12A, a hole into which a fixture 34 described later is inserted is drilled (opened) in a conical slope in the first upper dielectric spacer 13 and the second upper dielectric spacer 14. ). The material of the fixture 34 is not particularly limited as long as the strength can be secured.

  In the present application, in the U-shaped conductor fixing step, one end of the U-shaped conductor 7 is inserted and fixed in the hole of the first upper dielectric spacer 13, and the U-shaped conductor is fixed in the hole of the second upper dielectric spacer 14. The other end of 7 is inserted and fixed. As shown in FIG. 12A, one end of the U-shaped conductor 7 and the first upper dielectric spacer 13 have a hole in the radial direction, and one end of the U-shaped conductor 7 is connected to the first upper dielectric spacer. 13, a fixing tool 34 for fixing the U-shaped conductor 7 is inserted into the hole between the one end of the U-shaped conductor 7 and the first upper dielectric spacer 13, and one end of the U-shaped conductor 7 is inserted. Is fixed to the first upper dielectric spacer 13. Similarly, as shown in FIG. 12A, the other end of the U-shaped conductor 7 and the second upper dielectric spacer 14 have holes in the radial direction, and the other end of the U-shaped conductor 7 is connected to the second end. The U-shaped conductor 7 is inserted into the hole between the other end of the U-shaped conductor 7 and the second upper dielectric spacer 14, and the U-shaped conductor 7 fixing fixture 34 is inserted into the U-shaped conductor 7. The other end of the conductor 7 is fixed to the second upper dielectric spacer 14. In FIG. 12A, the fixture 34 is illustrated as a screw, but is not limited thereto, and may be a pin that can be inserted and removed.

  Further, as shown in FIG. 12A, the hole portions of the first upper dielectric spacer 13 and the second upper dielectric spacer 14 are depressions that can be inserted into both ends of the thin U-shaped conductor 7. Good. As a result, the first sub-columnar conductor 2 and the U-shaped conductor 7 (one end) can be fixed by the fixture 34 without being conducted, and the second sub-columnar conductor 3 and the U-shaped conductor 7 (the other end) can be conducted. Without fixing, it can be fixed by the fixture 34. Further, the central portion 7c of the U-shaped conductor 7 includes a first plate-like conductor 4a (an upper flange 4a of the upper-side second main columnar conductor 4u) formed on the tip portion of the second main columnar conductor 4 and the first plate. Sandwiched between the second plate-like conductor 4b (mounting bracket 4b) disposed on the shaped conductor 4a and fixed with a fixing tool such as a bolt.

  In the U-shaped conductor fixing step, when the holes of the first upper dielectric spacer 13 and the second upper dielectric spacer 14 are used, the U-shaped conductor 7 is fixed before the central portion 7c of the U-shaped conductor 7 is fixed. If one end and the other end of the conductor 7 are fixed, the operation can be performed easily. For example, the central portion 7 c of the U-shaped conductor 7 is pressed against the tip portion (upper flange 4 a) of the second main columnar conductor 4, or the central portion 7 c of the U-shaped conductor 7 is pressed against the second main columnar conductor 4. There is a method in which one end and the other end of the U-shaped conductor 7 are inserted into the holes of the first upper dielectric spacer 13 and the second upper dielectric spacer 14 by being hooked on the tip portion (upper flange 4a), respectively. Conceivable. At this time, if the aforementioned groove is formed in the upper flange 4a (first plate-like conductor 4a) of the second main columnar conductor 4, the U-shaped conductor 7 becomes the upper flange 4a (first plate-like conductor 4a). It is easy to push and hook. The U-shaped conductor 7 may be divided into two at the center portion 7c.

  That is, an L-shaped L-shaped conductor is combined. One end of the first bent portion 7a (second bent portion 7b) is fixed (inserted) to the first upper dielectric spacer 13 (second upper dielectric spacer 14), and the other end is The second main columnar conductor 4 is fixed at the tip portion (the upper flange 4a (first plate-like conductor 4a) and the mounting bracket 4b (second plate-like conductor 4b)). In this case, the upper flange 4a (first plate-like conductor 4a) and the mounting bracket 4b (second plate-like conductor 4b) may be fixed together, or the U-shaped conductor 7 may be a tubular conductor. It is good also as one by forming and inserting one side in the other. As a modification, the U-shaped conductor 7 may be formed of a tubular conductor, and the U-shaped conductor 7 may be inserted into the upper flange 4a (first plate-shaped conductor 4a). That is, the U-shaped conductor 7 may be a piece that is divided and fixed integrally at the central portion 7c. Here, “integral” means that it may be considered as being electrically integrated. Further, the U-shaped conductor 7 may have a structure that can be divided at the first bent portion 7a and the second bent portion 7b.

  Although not shown before the U-shaped conductor fixing step, the first upper dielectric spacer 13 is placed on the tip portion (upper flange) of the first sub-columnar conductor 2, and the tip portion of the second sub-columnar conductor 3. An upper dielectric spacer mounting step (upper dielectric spacer mounting step for sub-columnar conductors) for mounting the second upper dielectric spacer 14 on the (upper flange) is performed. When the first upper dielectric spacer 13 and the second upper dielectric spacer 14 have the above-mentioned conical shape, a bolt hole is formed on the lower side having a large diameter, and the first sub columnar conductor 2 and the second sub columnar conductor 3 are formed. What is necessary is just to fix to a front-end | tip part (upper flange) with fasteners, such as a volt | bolt.

  Although illustration is omitted, the wiring process is performed after the upper columnar conductor installation process (mostly after the U-shaped conductor fixing process). 1 to 6 and FIGS. 8 to 13, when the power feeding portion 6 is disposed on the second main columnar conductor 4 side, that is, the power feeding disposed inside the hollow second main columnar conductor 4. The part 6 and the first main columnar conductor 1 are electrically connected by wiring through the hollow central lower dielectric spacer 5. When the power feeding unit 6 is disposed on the first main columnar conductor 1 side, the power feeding unit 6 and the second main columnar conductor 4 disposed inside the hollow first main columnar conductor 1 are connected to the hollow center lower portion. Electrical connection is made through wiring through the dielectric spacer 5. When a coaxial line is used, the central conductor of the coaxial line is wired through the center lower dielectric spacer 5.

  Therefore, the antenna device installation method according to Embodiment 1 can provide a small antenna device having a high gain with the vertical direction as the main polarization, maintaining the gain of the main polarization of the dipole antenna, Not only can a dipole antenna with a cross-polarized gain suppressed by a symmetrical structure be obtained, but also its transport, assembly and installation are easy, and the number of supporting members such as branch lines is small, or supporting members It is possible to obtain a dipole antenna that can stand by itself.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 14, 15, and 16. FIG. The relationship between the antenna device shown in FIG. 14 and the antenna device shown in FIG. 15 is the presence or absence of reinforcement by a first connection body 11d and a second connection body 12d described later. The antenna device shown in FIG. 15 is provided with reinforcement by a first connection body 11d and a second connection body 12d described later. Therefore, the antenna device installation method shown in FIG. 15 has a lower-side columnar conductor reinforcement (lower-side columnar body reinforcement) step, which will be described later, but not the antenna device installation method shown in FIG. FIG. 16A clearly shows the correspondence with the specific components of the antenna device shown in FIGS. 14 and 15, and the components are shown separated by dotted lines. 16B is a front view of the antenna device shown in FIG. 14 and an enlarged cross-sectional view of a dotted line portion in the front view of the antenna device shown in FIG. 15 (for example, a direction in which a plan view shown in FIG. 2 in Embodiment 1 is viewed). The columnar conductor and the U-shaped conductor are divided into two, in other words, the columnar conductor and the U-shaped conductor are divided into two in the direction in which the columnar conductor and the U-shaped conductor extend). The antenna device (and the antenna device installation method) according to the first embodiment is intended for a dipole antenna, but the antenna device (and the antenna device installation method) according to the second embodiment is a monopole. It is intended for antennas.

  That is, the antenna device (and the installation method of the antenna device) according to the present application can be applied to a monopole antenna and a dipole antenna. In addition, the installation surface of the antenna device according to Embodiment 2 is assumed to be the ground or the rooftop of a building. The structure of the present invention described in the embodiment is an example, and the present invention is not limited only to the structure shown in the embodiment. In the second embodiment, description will be made mainly on parts different from the first embodiment, and description of common parts such as an antenna structure and a dielectric spacer structure may be omitted.

  The differences between the antenna devices (and the antenna device installation method) according to Embodiments 1 and 2 are as follows. In the first embodiment, one antenna element of the dipole antenna is composed of a first main columnar conductor 1, a first sub columnar conductor 2, a second sub columnar conductor 3, a first connection conductor 11, and a second connection conductor 12. The other antenna element of the dipole antenna is composed of the second columnar conductor 4 and the U-shaped conductor 7, and the feeding point 6 (feeding portion 6) is the tip portion of the first main columnar conductor 1 and the second main columnar conductor 4. It is arrange | positioned between the proximal end parts. On the other hand, in the second embodiment, one antenna element of the monopole antenna is configured by the conductor ground plane 16 (ground, ground plane), and the other antenna element of the monopole antenna is the main columnar conductor 15 (first element). 1 corresponding to the main columnar conductor 1 and the second columnar conductor 4), the first sub columnar conductor 2 (or the first sub columnar body 2d made of an insulating member such as a dielectric), and the second sub columnar conductor 3 (or And a second sub-columnar body 3d) made of an insulating member such as a dielectric, and a U-shaped conductor 7. A feeding point 6 (feeding portion 6) is a base end portion of the main columnar conductor 15 and a conductor ground plate 16. It is arranged between. The antenna device shown in FIG. 15 includes a first connection body 11d made of an insulating member such as a dielectric and a second connection body 12d made of an insulating member such as a dielectric as reinforcement. Specifically, each of the first connecting body 11d and the second connecting body 12d is such that at least a portion of the first connecting conductor 11 and the second connecting conductor 12 that contacts the main columnar conductor 15 is an insulating member. .

  14, 15, and 16, the main columnar conductor 15 is a second sub columnar conductor 3 (second sub columnar body 3 d) arranged side by side with the first sub columnar conductor 2 (first sub columnar body 2 d). And the first sub-columnar conductor 2 (first sub-columnar body 2d). That is, the main columnar conductor 15 is arranged between the first sub columnar conductor 2 (first sub columnar body 2d) and the second sub columnar conductor 3 (second sub columnar body 3d). The U-shaped conductor 7 is bent in a U-shape, one end is opposed to the tip portion of the first sub-columnar conductor 2 (first sub-columnar body 2d), and the other end is the second sub-columnar conductor 3 (second sub-conductor). The center portion 7c is fixed to the tip portion of the main columnar conductor 15 so as to face the tip portion of the columnar body 3d). Specifically, since the main columnar conductor 15 fixes the vicinity of the center of the central portion 7c, the U-shaped conductor 7 has a line-symmetric structure with respect to a line passing through the vicinity of the center. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  In FIGS. 14, 15, and 16, the main columnar conductor 15 includes a first plate-like conductor (upper flange) 4a formed at the tip and a second plate-like conductor 4b disposed on the first plate-like conductor 4a. (Mounting metal fittings), and a central portion 7c of the U-shaped conductor 7 is sandwiched and fixed between the first plate-like conductor 4a and the second plate-like conductor 4b. Similarly to the first embodiment, the second plate-like conductor 4 b is a member different from the main columnar conductor 15, so that after the U-shaped conductor 7 is fixed, the second plate-like conductor 4 b becomes the main columnar conductor 15. Become part. Further, at least one of the first plate-like conductor 4a or the second plate-like conductor 4b may have a groove portion into which the U-shaped conductor 7 is inserted. In the present application, the second plate-like conductor 4b is illustrated with a groove portion into which the U-shaped conductor 7 is inserted. Of course, the second plate-like conductor 4b may be eliminated and only the first plate-like conductor 4a (upper flange 4a) may be structured. In this case, the U-shaped conductor 7 can be easily held by forming a groove in which the U-shaped conductor 7 is inserted in the first plate-shaped conductor 4a (upper flange 4a). The U-shaped conductor 7 includes a first linear portion that extends linearly from one end to the first bent portion 7a, a second linear portion that extends linearly from the other end to the second bent portion 7b, and a first The center portion 7c extends linearly from the bent portion 7a to the second bent portion 7b. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  14, 15, and 16, the conductor ground plane 16 (metal ground plane 16) is a conductor flat plate formed on the installation surface. The power feeding unit 6 is insulated and disposed below the first sub columnar conductor 2 (first sub columnar body 2d), the second sub columnar conductor 3 (second sub columnar body 3d), and the base end portion of the main columnar conductor 15. The conductor ground plate 16 and the main columnar conductor 15 are electrically connected. The main columnar conductor 15 is linearly arranged to face the conductor ground plane 16 with the central lower dielectric spacer 8 interposed therebetween. The power feeding section (feeding point) 6 is built in the base end portion of the main columnar conductor 15 and is electrically connected to the main columnar conductor 15 and the conductor ground plate 16. The center lower dielectric spacer 8 is placed on a conductor ground plate 16 formed on the installation surface. The first lower dielectric spacer 9 and the second lower dielectric spacer 10 are respectively placed on a conductor ground plate 16 formed on the installation surface, and the central lower dielectric spacer 8 is disposed in the middle (intermediate). The first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 may be integral dielectric spacers. The first connecting body 11d fixes the first sub columnar conductor 2 (first sub columnar body 2d) and the main columnar conductor 15. The second connection body 12d fixes the second sub columnar conductor 3 (second sub columnar body 3d) and the main columnar conductor 15. The first connecting body 11d and the second connecting body 12d have the same length. The first lower conductor spacer 9m and the second lower conductor spacer 10m are obtained by replacing the first lower dielectric spacer 9 and the second lower dielectric spacer 10 described in the first embodiment with a conductor such as metal. . In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  The structure of the antenna device according to Embodiment 2 will be described. The antenna device according to Embodiment 2 is a monopole antenna. One antenna element (exciter part (metal part)) of the monopole antenna of the antenna device according to the second embodiment is composed of a conductor ground plate 16 (lower antenna) as shown in FIGS. Element, antenna element on the other side). The other antenna element (exciter portion (metal portion)) of the monopole antenna of the antenna device according to the second embodiment is based on the central lower dielectric spacer 8 placed on the conductor ground plane 16 formed on the installation surface. The end portion is fixed, the main columnar conductor 15 is erected, is bent into a U-shape, one end is fixed to the first upper dielectric spacer 13, the other end is fixed to the second upper dielectric spacer 14, and the central portion 7c. Is composed of four columnar conductors of the U-shaped conductor 7 fixed to the tip of the main columnar conductor 15 (upper antenna element, other antenna element).

  In the present application, the main columnar conductor 15 is composed of two members, that is, an upper side main columnar conductor 15u in which the first plate-like conductor 4a is formed and a lower side main columnar conductor 15d in which the power feeding unit 6 is built. Things are illustrated. For example, the power feeding unit 6 electrically connects the outer conductor of the coaxial line disposed in the power feeding unit 6 to the conductor ground plate 16, and the central conductor of the coaxial line disposed in the power feeding unit 6 is connected to the main columnar conductor 15. Connect electrically.

  In the present application, an example in which the power feeding unit 6 is built in the lower main columnar conductor 15d side of the main columnar conductor 15 is illustrated. Therefore, members are arranged (fixed) in the order of the lower main columnar conductor 15d and the upper main columnar conductor 15u from the center lower dielectric spacer 8 side. Of course, the power feeding unit 6 may be wired from the outside of the main columnar conductor 15 (for example, a coaxial line). In the antenna device according to the second embodiment, the first sub columnar conductor 2, the second sub columnar conductor 3, the main columnar conductor 15, and the U-shaped conductor 7 use hollow conductor bars (metal bars, metal pipes). Thus, weight reduction can be achieved. Similarly, the first sub columnar body 2d and the second sub columnar body 3d can be reduced in weight by using a hollow bar. The main columnar conductor 15 and the U-shaped conductor 7 are hollow metal bars, and can be said to constitute an exciter of a monopole antenna.

  Further, the first sub-columnar conductor 2 (first sub-columnar body 2d) and the second sub-columnar conductor 3 (second sub-columnar body 3d) contribute greatly to the independence of the antenna device according to the second embodiment or the independence by supporting the branch line. Unlike the main columnar conductor 15, the U-shaped conductor 7 is supported by the main columnar conductor 15. Therefore, the U-shaped conductor 7 includes the first sub columnar conductor 2 (first sub columnar body 2d), the second sub columnar conductor 3 (second sub columnar body 3d), and the main columnar conductor as in the first embodiment. The diameter can be smaller than 15. Moreover, it is good also as a small diameter and lightweight. The first bent portion 7a and the second bent portion 7b of the U-shaped conductor 7 (the portion facing the installation surface) are interposed via the first upper dielectric spacer 13 and the second upper dielectric spacer 14. Thus, it can be said that the first sub columnar conductor 2 (first sub columnar body 2d) and the second sub columnar conductor 3 (second sub columnar body 3d) are also supported.

  Similarly, the first sub-columnar conductor 2 (first sub-columnar body 2d) and the second sub-columnar conductor 3 (second sub-columnar body 3d) contribute greatly to the independence of the antenna device according to the second embodiment or the independence by supporting the branch line. Unlike the main columnar conductor 15, the first connecting body 11d and the second connecting body 12d shown in FIG. 15 have a first sub columnar conductor 2 (first sub columnar body 2d) and a second sub columnar conductor 3 (second The sub columnar body 3d) and the main columnar conductor 15 can have a smaller diameter. Moreover, it is good also as a small diameter and lightweight. The first connecting body 11d and the second connecting body 12d may be hollow. However, the first sub-columnar conductor 2 (first sub-columnar body 2d), the second sub-columnar conductor 3 (second sub-columnar body 3d), and the main columnar conductor 15 by the first connecting body 11d and the second connecting body 12d. When using it for the purpose of maintaining the distance relationship (positional relationship) between the two, a certain degree of strength is required.

  The structure of the antenna device according to Embodiment 2 will be described in more detail. As shown in FIGS. 14 and 15, the upper main columnar conductor 15u has a lower flange at the base end portion and an upper flange 4a at the distal end portion. The lower main columnar conductor 15d has a lower flange at the proximal end portion and an upper flange at the distal end portion. As shown in FIGS. 14 and 15, in the main columnar conductor 15, the lower flange of the upper side main columnar conductor 15u and the upper flange of the lower side main columnar conductor 15d are directly fixed by fasteners such as bolts. The upper flange 4a of the upper main columnar conductor 15u and the U-shaped conductor 7 are connected by a mounting bracket 4b. The center lower dielectric spacer 8 fixes the lower flange of the lower main columnar conductor 15d (main columnar conductor 15) and the conductor ground plate 6 without conducting them. The lower flange of the lower main columnar conductor 15d is fixed to the opposing surface of the central lower dielectric spacer 8 with a fastener such as a bolt.

  As shown in FIG. 15, the first connecting body 11d is formed between the lower flanges of the main columnar conductor 15 and the first sub-columnar conductor 2 (first sub-columnar body 2d), and is a fastener such as a bolt. The main columnar conductor 15 and the first sub columnar conductor 2 (first sub columnar body 2d) are fixed to the lower flange. The second connection body 12d is formed between the lower flanges of the main columnar conductor 15 and the second sub-columnar conductor 3 (second sub-columnar body 3d), and is a fastener such as a bolt. It is fixed to the lower flange of the sub columnar conductor 3 (second sub columnar body 3d).

  If such a structure is adopted, the antenna device according to the second embodiment can easily obtain an antenna device that achieves a low profile while having a simple structure, similarly to the antenna device according to the first embodiment. In addition, it is possible to easily obtain an antenna device that can stand on the installation surface with a small number of branch lines, or an antenna device that can stand on its own without using branch lines. In particular, in the structure shown in FIG. 15, the first connecting body 11d and the second connecting body 12d contribute to securing the strength.

  Next, the operation and size reduction of the antenna device according to Embodiment 2 will be described with reference to FIG. FIG. 16 (a) corresponds to the front view (FIGS. 14 and 15) of the antenna device according to the second embodiment, and schematically shows the exciter part (metal part, antenna element) and the feeding point 6. FIG. It is a figure. The monopole antenna is a conductor (the above-mentioned upper antenna element) when a quarter-wave conductor (equivalent to the above-mentioned upper antenna element and the other antenna element) is raised to the ground and voltage is supplied to the ground plane. Is equivalent to a dipole antenna by feeding power to the mirror image of the other antenna element so that a potential difference is generated at both ends of the feeding point 6 of the antenna device. Therefore, by bending the exciter portion (corresponding to the above-described upper antenna element and the other antenna element), the apparatus can be miniaturized while ensuring the current path length and suppressing the gain reduction of the antenna.

  With the structure of the antenna device according to Embodiment 2, it is possible to obtain a small antenna device having a high gain with the vertical polarization as the main polarization. With the structure of the antenna device according to the second embodiment, it is possible to obtain a monopole antenna in which the gain of the main polarization of the monopole antenna is maintained and the cross polarization gain is suppressed by using a symmetrical structure.

  Then, the installation method (assembly procedure) of the antenna device which concerns on Embodiment 2 is demonstrated. Unlike Embodiment 1, in the method of installing the antenna device shown in FIG. 15 in Embodiment 2, there is a lower side columnar conductor reinforcement (lower side columnar body reinforcement) step, but a lower side columnar conductor electrical connection step. There is no. Note that the antenna device installation method shown in FIG. The step of placing the lower dielectric spacer (lower conductor spacer) in the antenna device installation method according to the second embodiment includes the first lower dielectric spacer 9 (first lower conductor spacer 9m) and the second lower dielectric spacer 10 ( The second lower conductor spacer 10m) and the central lower dielectric spacer 8 are placed on the conductor ground plate 16 formed on the installation surface. It can be said that the lower dielectric spacer (lower conductor spacer) placing step is also a lower spacer placing step. During the lower spacer placing step, the first lower dielectric spacer 9 (first lower conductor spacer 9m), the second lower dielectric spacer 10 (second lower conductor spacer 10m), and the central lower dielectric spacer 8 are installed. The first sub-columnar conductor 2 (first sub-columnar body 2d), the second sub-columnar conductor 3 (second sub-columnar body 3d), and the main columnar conductor 15 may be fixed to the conductor base plate 16 formed in When standing, the first sub columnar conductor 2 (first sub columnar body 2d), the second sub columnar conductor 3 (second sub columnar body 3d), and the main columnar conductor 15 may be collectively fixed to the conductor ground plate 16. . Originally, a conductor ground plane in which a first lower dielectric spacer 9 (first lower conductor spacer 9m), a second lower dielectric spacer 10 (second lower conductor spacer 10m), and a central lower dielectric spacer 8 are formed on the installation surface. 16 or the lower spacer placement process is not required. When it is necessary to perform a conductor ground plane placing step for placing (fixing) the conductor ground plane 16 on the installation surface, this is performed before the lower spacer placing step.

  The lower-side columnar conductor (lower-side columnar body) installation step in the antenna device installation method according to Embodiment 2 includes a first sub-columnar conductor 2 (first sub-columnar body 2d) and a second sub-columnar conductor 3 (second The sub columnar body 3d) and the main columnar conductor 15 are respectively erected on the installation surface, and the first sub columnar conductor 2 (first sub columnar body 2d), the second sub columnar conductor 3 (second sub columnar body 3d), and The main columnar conductor 15 is disposed between the two. In the case where the installation method of the antenna device according to the second embodiment requires a lower spacer mounting step, the first lower dielectric spacer 9 (first first) is provided before the lower columnar conductor (lower columnar body) installation step. A lower dielectric spacer (lower conductor spacer) mounting step for mounting the lower dielectric spacer 9m), the second lower dielectric spacer 10 (second lower dielectric spacer 10m), and the central lower dielectric spacer 8 on the installation surface; There is a need to do. That is, the lower-side columnar conductor (lower-side columnar body) installation step includes the first lower dielectric spacer 9 (first lower conductor spacer 9m) and the second lower dielectric spacer 10 (second lower portion) placed on the installation surface. The base end of the first sub columnar conductor 2 (first sub columnar body 2d), the second sub columnar conductor 3 (second sub columnar body 3d), and the main columnar conductor 15 is formed on the conductor spacer 10m) and the central lower dielectric spacer 8. It can be said that each part is fixed.

  The lower-side columnar conductor reinforcement (lower-side columnar body reinforcement) step in the antenna device installation method according to Embodiment 2 is not necessary when the first connection body 11d and the second connection body 12d shown in FIG. 14 are not used. is there. This is necessary in the antenna apparatus shown in FIG. In the lower side columnar conductor reinforcement (lower side columnar body reinforcement) step, the first sub columnar conductor 2 (first sub columnar body 2d) and the second sub columnar conductor 3 (second sub columnar body 3d) are used as the main columnar conductor 15. It is to be fixed. Specifically, the step of connecting the main columnar conductor 15 and the first sub columnar conductor 2 (first sub columnar body 2d) with the first connecting body 11d, the main columnar conductor 15 and the second sub columnar conductor 3 (second sub columnar shape). The body 3d) by the second connecting body 12d. In addition, the implementation order of a lower side columnar conductor reinforcement (lower side columnar body reinforcement) process is not ask | required. It may be after the U-shaped conductor fixing step and the wiring step described later.

  In the U-shaped conductor fixing step in the antenna device installation method according to the second embodiment, the U-shaped conductor fixing step was placed on the tip portion of the first sub columnar conductor 2 (first sub columnar body 2d) of the first upper dielectric spacer 13. One end of the U-shaped conductor 7 bent in a U-shape is fixed to the surface opposite to the surface, and is attached to the tip portion of the second sub-columnar conductor 3 (second sub-columnar body 3d) of the second upper dielectric spacer 14. The other end of the U-shaped conductor 7 is fixed to the surface opposite to the mounted surface, and the central portion 7 c of the U-shaped conductor 7 is fixed to the tip portion of the second main columnar conductor 4. In the present application, in the U-shaped conductor fixing step, one end of the U-shaped conductor 7 is inserted and fixed in the hole of the first upper dielectric spacer 13, and the U-shaped conductor is fixed in the hole of the second upper dielectric spacer 14. The other end of 7 is inserted and fixed.

  As in the first embodiment, when the holes of the first upper dielectric spacer 13 and the second upper dielectric spacer 14 are used in the U-shaped conductor fixing step, the center portion 7c of the U-shaped conductor 7 is fixed. If one end and the other end of the U-shaped conductor 7 are fixed before the operation, the operation can be performed easily. In FIG. 16B, similarly to FIG. 12A, the first sub columnar conductor 2 (second sub columnar conductor 2d), the second sub columnar conductor 3 (second sub columnar conductor 3d), and the U-shaped conductor. Reference numeral 7 denotes a hollow object. Similarly, in FIG. 16B, a hole into which the fixture 34 is inserted is drilled (opened) in a conical slope in the first upper dielectric spacer 13 and the second upper dielectric spacer 14. The material of the fixture 34 is not particularly limited as long as the strength can be secured. For example, the central portion 7c of the U-shaped conductor 7 is pressed against the tip portion (upper flange 4a) of the main columnar conductor 15, or the central portion 7c of the U-shaped conductor 7 is pressed to the tip portion (upper portion of the main columnar conductor 15). Hang on the flange 4a), one end and the other end of the U-shaped conductor 7 are inserted into the holes of the first upper dielectric spacer 13 and the second upper dielectric spacer 14, respectively, and fixed by the fixture 34, etc. Can be considered. At this time, if the aforementioned groove is formed in the upper flange 4a (first plate-like conductor 4a) of the main columnar conductor 15, the U-shaped conductor 7 is pushed against the upper flange 4a (first plate-like conductor 4a). Easy to hit and hook. Prior to the U-shaped conductor fixing step, the upper dielectric spacer placing step (sub-columnar conductor upper dielectric spacer placing step) is performed as in the first embodiment. When the first upper dielectric spacer 13 and the second upper dielectric spacer 14 have the above-mentioned conical shape, the fixing method is as described above.

  In the second embodiment, the wiring process is performed after the lower-side columnar conductor installation process (mostly after the U-shaped conductor fixing process). In the case of the arrangement of the power feeding section 6 as shown in FIG. 14 and FIG. 15, that is, the power feeding section 6 and the conductor ground plate 16 arranged inside the hollow main columnar conductor 15 are arranged in the hollow central lower dielectric spacer 5. It is electrically connected through wiring. When the central conductor of the coaxial line is connected to the conductor ground plate 16, when the coaxial line is used, the central conductor of the coaxial line is wired via the inside of the center lower dielectric spacer 5.

  Therefore, the antenna device installation method according to Embodiment 2 can provide a small antenna device having a high gain with the vertical polarization as the main polarization, maintaining the main polarization gain of the monopole antenna, Not only can a monopole antenna with suppressed cross-polarized gain be suppressed by using a symmetric structure, it is easy to transport, assemble and install, and the number of supporting members such as branch lines is small, or A monopole antenna that is self-supporting without a supporting member can be obtained.

  In the antenna device (and the antenna device installation method) according to Embodiment 2, the first sub-columnar conductor 2 and the second sub-columnar conductor 3 are grounded, that is, electrically connected to the conductor ground plane 16. Thus, the first sub-columnar conductor 2 and the second sub-columnar conductor 3 may function as a sleeve conductor of the monopole antenna. This is because the first sub columnar conductor 2 and the second sub columnar conductor 3 are insulated from the U-shaped conductor 7 by the first upper dielectric spacer 13 and the second upper dielectric spacer 14, respectively. . In such a case, the antenna apparatus installation method according to the second embodiment performs the lower-side columnar conductor grounding step in addition to the lower-side columnar conductor reinforcing step (if implemented).

  When the first lower conductor spacer 9m and the second lower conductor spacer 10m are used instead of the first lower dielectric spacer 9 and the second lower dielectric spacer 10, the lower columnar conductor grounding step is performed at the lower columnar conductor. During the conductor installation process, the first sub-columnar conductor 2 and the second sub-columnar conductor 3 are electrically connected to the conductor ground plate 16 to be in a grounded state, so that the lower-side columnar conductor installation process is completed as the lower-side columnar conductor grounding process. It is good also as the end of. Therefore, in this case, it can be interpreted that the lower columnar conductor grounding step is performed within the lower columnar conductor installation step. Of course, the first sub-columnar conductor 2 and the first lower conductor spacer 9m may be integrated. The second sub columnar conductor 3 and the second lower conductor spacer 10m may be integrated. In this case, with respect to the first sub-columnar conductor 2 and the second sub-columnar conductor 3, the lower dielectric spacer (lower conductor spacer) placement step, the lower side columnar conductor installation step, and the lower side columnar conductor grounding step are performed in one step. It can be considered to be implemented.

  When the first lower dielectric spacer 9 and the second lower dielectric spacer 10 are used, the lower-side columnar conductor grounding step in the antenna device installation method according to the second embodiment includes the first sub-columnar conductor 2, the conductor ground plane 16, and the like. And the step of electrically connecting the second sub-columnar conductor 3 and the conductor ground plate 16. In such an antenna device (and a method for installing the antenna device), the first lower dielectric spacer 9 and the second lower dielectric spacer 10 are unnecessary, but the hollow first lower dielectric spacer 9 and the hollow second dielectric spacer 9 are not necessary. Using the lower dielectric spacer 10, wiring may be passed through the first lower dielectric spacer 9 and the second lower dielectric spacer 10, respectively, and grounded. As the antenna device according to Embodiment 2, the main columnar conductor 1 arranged between (in the middle) between the first subcolumnar conductor 2 and the second subcolumnar conductor 3 includes the first subcolumnar conductor 2 and the second subcolumnar conductor 2. Since the sub-columnar conductor 3 functions as a sleeve conductor, the antenna device can have a wide band.

  In the antenna device installation method according to the second embodiment, the first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 placed on the conductor ground plate 16 formed on the installation surface are used. The base end portions of the first sub-columnar conductor 2, the second sub-columnar conductor 3 and the main columnar conductor 15 are fixed, and the first sub-columnar conductor 2, the second sub-columnar conductor 3 and the main columnar conductor 15 are connected to the conductor ground plate 16. A lower columnar conductor installation step in which the main columnar conductor 15 is disposed between the first subcolumnar conductor 2 and the second subcolumnar conductor 3, and the tip of the first subcolumnar conductor 2 is An upper dielectric spacer placement step of placing the first upper dielectric spacer 13 and placing the second upper dielectric spacer 14 on the tip of the second sub-columnar conductor 3; 1 sub pillar One end of a U-shaped conductor 7 bent in a U-shape is fixed to a surface opposite to the surface placed on the distal end portion of the conductor 2, and the distal end of the second sub-columnar conductor 3 of the second upper dielectric spacer 14 is fixed. The U-shaped conductor fixing step of fixing the other end of the U-shaped conductor 7 to the surface opposite to the surface placed on the portion and fixing the central portion of the U-shaped conductor 7 to the tip portion of the main columnar conductor 15 It can be said that it is equipped with.

  The antenna device according to Embodiment 2 includes a first sub-columnar conductor 2, a second sub-columnar conductor 3 arranged side by side with the first sub-columnar conductor 2, the first sub-columnar conductor 2 and the second sub-columnar. The main columnar conductors 15 arranged between the conductors 3, the first sub columnar conductor 2, the second sub columnar conductor 3, and the conductor ground plane 16 disposed below the base end portions of the main columnar conductors 15. The feeder 6 electrically connected to the main columnar conductor 15 and the conductor ground plate 16, bent in a U-shape, one end is opposed to the tip of the first sub-columnar conductor 2, and the other end is the second sub It can be said that it is provided with a U-shaped conductor 7 which is opposed to the tip portion of the columnar conductor 3 and whose central portion is fixed to the tip portion of the main columnar conductor 15.

  In the antenna device (and the antenna device installation method) according to Embodiment 2, even when the first sub-columnar conductor 2 and the second sub-columnar conductor 3 function as sleeve conductors, the lower-side columnar conductor reinforcement step is performed. Also good. That is, the main columnar conductor 15, the first subcolumnar conductor 2, and the second connection column 12 d are insulated from the main columnar conductor 15, the first subcolumnar conductor 2, and the second subcolumnar conductor 3. The second sub-columnar conductor 3 may be fixed. In the antenna device (and the antenna device installation method) according to Embodiment 2, when the first sub columnar body 2d and the second sub columnar body 3d are used, the first upper dielectric spacer 13 and the second upper dielectric layer are used. The body spacer 14 includes a conductive first upper conductor spacer made of metal or the like (replacement of the first upper dielectric spacer 13 with a conductor such as metal), and a conductive second upper conductor spacer made of metal or the like (first (2) The upper dielectric spacer 14 may be replaced with a conductor such as metal. Further, in the antenna device (and the antenna device installation method) according to the second embodiment, the first lower dielectric spacer 9 is used and the first sub-columnar conductor 2 and the conductor ground plane 16 are electrically connected. Even if the second lower dielectric spacer 10 is used and the second sub-columnar conductor 3 and the conductor ground plate 16 are not electrically connected (insulated), the first upper dielectric spacer 13 is used. The second upper dielectric spacer 14 may be a conductive first upper conductor spacer such as a metal and a conductive second upper conductor spacer such as a metal.

  That is, the configuration for supporting one end of the U-shaped conductor 7 is, in order from the conductor ground plane 16 side, the conductive or insulating first lower spacer, the conductive or insulating first sub columnar body, the conductive or insulating property. In this case, at least one of the first lower spacer, the first sub-columnar body, and the first upper spacer may be insulative. Similarly, the structure for supporting the other end of the U-shaped conductor 7 is, in order from the conductor ground plane 16 side, a conductive or insulating second lower spacer, a conductive or insulating second sub-columnar body, conductive or insulating. As long as the second upper spacer is made of a conductive material, at least one of the second lower spacer, the second sub-columnar body, and the second upper spacer may be insulative. The first lower spacer, the first sub-columnar body, and the first upper spacer may be referred to as a first support. The second lower spacer, the second sub-columnar body, and the second upper spacer may be referred to as a second support. The first support and the second support support the U-shaped conductor 7 and have a substantially columnar appearance. In such a case, the base end portion of the first support is fixed on the conductor ground plate 16 (installation surface), and one end of the U-shaped conductor 7 is fixed at the tip end portion. Similarly, as for the 2nd support, the base end part is being fixed on the conductor ground plane 16 (installation surface), and the other end of the U-shaped conductor 7 is being fixed by the front-end | tip part. It can be said that the U-shaped conductor 7 is insulated from the conductor ground plane 16 by the first support body and the second support body. Similar to the first upper spacer (first dielectric spacer 13 and first conductor spacer) and the second upper spacer (second dielectric spacer 14 and second conductor spacer), the first support and the second support And a hole for inserting the U-shaped conductor 7 at the tip, and a hole for inserting a fixture 34 for fixing the U-shaped conductor 7 inserted into the hole.

  When the first support body and the second support body function as sleeve conductors, the base ends of the first support body and the second support body are formed of conductors and are electrically connected to the conductor ground plane 16. The tip side may be made of an insulating member such as a dielectric. At this time, a hole (groove) into which the U-shaped conductor 7 is inserted may be provided on the tip side, like the first upper dielectric spacer 13 and the second upper dielectric spacer 14. Further, it is only necessary that the tip side has a hole into which the fixture 34 is inserted, like the first upper dielectric spacer 13 and the second upper dielectric spacer 14.

  Therefore, the antenna device installation method according to the second embodiment includes the first support and the second support mounted on the conductor ground plate 16 formed on the installation surface, the center lower dielectric spacer 8, and the center lower dielectric. The base end portion of the main columnar conductor 15 is fixed to the body spacer 8, and the first support and the second support and the main columnar conductor 15 are erected on the conductor ground plate 16, respectively. One end of the U-shaped conductor 7 bent into a U-shape is fixed on the lower side columnar body installation step of disposing the main columnar conductor 15 between the body and the side of the first support body opposite to the conductor ground plane 16 side. The U-shaped conductor that fixes the other end of the U-shaped conductor 7 on the side opposite to the conductor ground plane 16 side of the second support and fixes the central portion of the U-shaped conductor 7 to the tip portion of the main columnar conductor 15. It can be said that it has a fixing process.

  Therefore, the antenna device according to the second embodiment is arranged between the first support, the second support arranged side by side with the first support, and the first support and the second support. The main columnar conductor 15, the first support body, the second support body, and the conductor base plate 16 disposed below the base end portion of the main columnar conductor 15 so as to be insulated from the main columnar conductor 15, and the main columnar conductor 15 And the power supply unit 6 electrically connected to the conductor ground plate 16, bent in a U shape, one end is opposed to the tip portion of the first support, and the other end is opposed to the tip portion of the second support, It can be said that the central portion is provided with the U-shaped conductor 7 fixed to the tip portion of the main columnar conductor 15.

  An application of the second embodiment to another embodiment will be described. First, it will be described that the first support and the second support can also be used in the antenna device (dipole antenna) according to the first embodiment. That is, the first support body and the second support body are electrically connected to the first main columnar conductor 1 by the first connection conductor 11 and the second connection conductor 12, respectively, without installing the conductor ground plane 16. What is necessary is just to take a structure. Specifically, the first support, the second support arranged side by side with the first support, and the first support and the second support are arranged between the first support and the second support. A first main columnar conductor 1 electrically connected to the body, a second main columnar conductor 4 disposed in series opposite the first main columnar conductor 1 via a central upper dielectric spacer 8, A power feeding portion 6 electrically connected to the first main columnar conductor 1 and the second main columnar conductor 4, a U-shaped bent portion, one end is opposed (fixed) to the tip portion of the first support, and the other end Can be said to be an antenna device (dipole antenna) provided with a U-shaped conductor 7 fixed to the distal end portion of the second main columnar conductor 4 with the central portion opposed (fixed) to the distal end portion of the second support. The same applies to the third embodiment described below. Specifically, the first sub-columnar conductor 2, the second sub-columnar conductor 3, the third sub-columnar conductor 17, and the fourth sub-columnar conductor 18 are respectively a first support, a second support, and a third support (first 3 lower spacers, 3rd sub-columnar bodies, 3rd upper spacers) and 4th support bodies (4th lower spacers, 4th sub-columnar bodies, 4th upper spacers). Then, the third sub-columnar conductor 17 and the fourth sub-columnar conductor 18 described in the third embodiment may function as a sleeve conductor. That is, at least one of the first sub columnar conductor 2, the second sub columnar conductor 3, the third sub columnar conductor 17, and the fourth sub columnar conductor 18 may be a sleeve conductor.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. FIG. 17 clearly shows the correspondence with the specific components of the antenna device shown in FIGS. 18 and 19, and the components are shown separated by dotted lines. 12A is an enlarged sectional view of a dotted line portion in the front view of the antenna device shown in FIG. 18 and the rear view of the antenna device shown in FIG. 19 (for example, the columnar conductor and U in the direction of viewing the plan view shown in FIG. 2). The character-shaped conductor is divided into two, in other words, the columnar conductor and the U-shaped conductor are divided into two in the direction in which the columnar conductor and the U-shaped conductor extend). In the antenna device (and the antenna device installation method) according to the first and second embodiments, the hollow metal rod (the first main columnar conductor 1 and the second main columnar conductor 4 and the main columnar conductor 15) that supplies power is used. In contrast to the structure in which the other two hollow metal rods (the first sub-columnar conductor 2 and the second sub-columnar conductor 3) are installed at positions symmetrical with respect to the left and right, in the third embodiment, power feeding is performed. A plurality of other hollow metal rods (third sub-columnar conductor 17 and fourth sub-columnar shape) at equal angular intervals on the circumference centered on the hollow metal rod (first main columnar conductor 1 and second main columnar conductor 4) to be performed The conductor 18) is installed. Thereby, the rigidity of an antenna apparatus can be improved and the antenna apparatus which becomes independent without a fewer supporting member or a supporting member can be obtained. Although the front view (rear view) of the antenna device shown in FIGS. 18 and 19 is omitted, among the components shown in FIGS. 18 and 19, the same components as those of the antenna device according to Embodiment 1 are described. The positional relationship corresponds (matches) with that shown in the front view of FIG. 1 (the rear view of FIG. 2). The U-shaped conductor 7 and the second U-shaped conductor 21 can be said to be X-shaped X-shaped conductors when viewed as a plan view. The U-shaped conductor 7 and the second U-shaped conductor 21 may be an integral X-shaped conductor.

  In the third embodiment, a case where the antenna device is a dipole antenna and the equiangular interval is 90 ° on the above-described circumference will be described as an example. That is, the first sub-columnar conductor 2, the first lower dielectric spacer 9, the first upper dielectric spacer 13, the second sub-columnar conductor 3, the second lower dielectric spacer 10, the second upper dielectric spacer 14, the U-shape. The conductors 7 rotated 90 ° on the circumferences centered on the hollow metal rods (the first main columnar conductor 1 and the second main columnar conductor 4) are the third sub-columnar conductor 17 and the third sub-columnar conductor 17, respectively. This corresponds to the lower dielectric spacer 22, the third upper dielectric spacer 24, the fourth sub-columnar conductor 18, the fourth lower dielectric spacer 24, the fourth upper dielectric spacer 25, and the second U-shaped conductor 21. The first connection conductor 11 and the second connection conductor 12 are rotated by 90 ° on the circumference around the hollow metal rod (first main columnar conductor 1 and second main columnar conductor 4), respectively. , Corresponding to the third connection conductor 19 and the fourth connection conductor 20.

  When the antenna device is a monopole antenna, the equiangular interval may be arbitrary on the circumference described above. In addition, the installation surface of the antenna device according to Embodiment 3 is assumed to be the ground or the rooftop of a building. The structure of the present invention described in the embodiment is an example, and the present invention is not limited only to the structure shown in the embodiment. In the third embodiment, description will be made mainly on parts different from the first and second embodiments, and description of common parts such as an antenna structure and a dielectric spacer structure may be omitted.

  In the third embodiment, the first sub columnar conductor 2, the first lower dielectric spacer 9, the first upper dielectric spacer 13, the second sub columnar conductor 3, the second lower dielectric spacer 10, and the second upper dielectric spacer. 14 and U-shaped conductors 7 are a third sub-columnar conductor 17, a third lower dielectric spacer 22, a third upper dielectric spacer 24, a fourth sub-columnar conductor 18, a fourth lower dielectric spacer 24, and a second, respectively. 4 Corresponding to the upper dielectric spacer 25 and the second U-shaped conductor 21, “the first sub-columnar conductor 2, the first lower dielectric spacer 9, and the first upper dielectric relating to the same parts as in the first and second embodiments. The description of the spacer 13, the second sub-columnar conductor 3, the second lower dielectric spacer 10, the second upper dielectric spacer 14, and the U-shaped conductor 7 "is omitted.

  17 to 20, the first main columnar conductor 1 is arranged between the fourth sub-columnar conductor 18 and the third sub-columnar conductor 17 (intermediate) arranged side by side with the third sub-columnar conductor 17. Yes. That is, the first main columnar conductor 1 is arranged between the third sub columnar conductor 17 and the fourth sub columnar conductor 18. The first main columnar conductor 1 is electrically connected to the third sub columnar conductor 17 and the fourth sub columnar conductor 18. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  17 to 20, the second U-shaped conductor 21 is bent in a U-shape, one end is opposed to the distal end portion of the third sub-columnar conductor 17, and the other end is opposed to the distal end portion of the fourth sub-columnar conductor 18. The central portion 21c is fixed to the tip portion of the second main columnar conductor 4 so as to face each other. Specifically, since the second main columnar conductor 4 fixes the vicinity of the center of the central portion 21c, the second U-shaped conductor 21 has a line-symmetric structure with respect to a line passing through the vicinity of the center. That is, the U-shaped conductor 7 and the second U-shaped conductor 21 are held crossing at the tip portion of the second main columnar conductor 4. When the U-shaped conductor 7 and the second U-shaped conductor 21 are divided into two at the central portion 7c, the upper flange 4a (first The plate-like conductor 4a) and the mounting bracket 4b (second plate-like conductor 4b) may be fixed together. Also. The U-shaped conductor 7 and the second U-shaped conductor 21 may be formed of a tubular conductor, and one may be inserted into the other to be integrated. As a modified example, the second U-shaped conductor 21 may be formed of a tubular conductor, and the second U-shaped conductor 21 may be inserted into the upper flange 4a (first plate-shaped conductor 4a). That is, the second U-shaped conductor 21 may be a piece that is divided and fixed integrally at the central portion 7c. Here, “integral” means that it may be considered as being electrically integrated. That is, the second U-shaped conductor 21 is also a combination of the L-shaped L-shaped conductors, like the U-shaped conductor 7. One end of the first bent portion 21a (second bent portion 21b) is fixed (inserted) to the third upper dielectric spacer 24 (fourth upper dielectric spacer 25), and the other end is The second main columnar conductor 4 is fixed at the tip portion (the upper flange 4a (first plate-like conductor 4a) and the mounting bracket 4b (second plate-like conductor 4b)). Further, the U-shaped conductor 7 and the second U-shaped conductor 21 may have a structure that can be divided at the first bent portion 7a and the second bent portion 7b. The U-shaped conductor 7 and the second U-shaped conductor 21 may be integrated. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  17 to 20, the second main columnar conductor 4 sandwiches and fixes the central portion 7 c of the second U-shaped conductor 21 between the first plate-like conductor 4 a and the second plate-like conductor 4 b. is there. Since the second plate-like conductor 4 b is a member different from the second main columnar conductor 4, the second plate-like conductor 4 b becomes a part of the second main columnar conductor 4 after the second U-shaped conductor 21 is fixed. Become. Further, at least one of the first plate-like conductor 4a or the second plate-like conductor 4b may have a groove portion into which the second U-shaped conductor 21 is inserted. In the present application, the second plate-like conductor 4b is illustrated with a groove portion into which the second U-shaped conductor 21 is inserted. The U-shaped conductor 21 includes a first straight portion that extends linearly from one end to the first bent portion 21a, a second straight portion that extends linearly from the other end to the second bent portion 21b, and a first The central portion 7c extends linearly from the bent portion 21a to the second bent portion 21b. In the present application, the second bent portion 21a and the second bent portion 21b include those bent at an angle of 90 °. That is, the second U-shaped conductor 21 can also be said to be the second U-shaped conductor 21 (second П-shaped conductor 21). In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  17 to 20, the third lower dielectric spacer 22 and the fourth lower dielectric spacer 23 are respectively placed on the installation surface, and the central lower dielectric spacer 8 is disposed in the middle (intermediate). The third lower dielectric spacer 22, the fourth lower dielectric spacer 24, and the central lower dielectric spacer 8 may be integral dielectric spacers. Further, it may be embedded in the installation surface, or the installation surface itself may have this function (dielectric spacer). The third connection conductor 19 electrically connects the third sub columnar conductor 17 and the first main columnar conductor 1. The fourth connection conductor 20 is for electrically connecting the fourth sub columnar conductor 18 and the first main columnar conductor 1. The third connection conductor 19 and the fourth connection conductor 20 have the same length. The third connecting conductor 19 and the fourth connecting conductor 20 can also function as standing reinforcements for the first main columnar conductor 1, the third sub columnar conductor 17, and the fourth sub columnar conductor 18. The third upper dielectric spacer 24 is formed at the tip portion of the third sub-columnar conductor 17. The fourth upper dielectric spacer 25 is formed at the tip of the fourth sub-columnar conductor 18. The third upper dielectric spacer 24 and the fourth upper dielectric spacer 25 have, for example, a thin conical shape on the upper side. In FIG. 20, the third sub-columnar conductor 17, the fourth sub-columnar conductor 18, and the second U-shaped conductor 21 are hollow. Similarly, in FIG. 20, a hole into which the fixing tool 45 for fixing the second U-shaped conductor 21 is inserted is formed in a conical slope in the third upper dielectric spacer 24 and the fourth upper dielectric spacer 25. Yes (open). The material of the fixture 35 is not particularly limited as long as the strength can be secured in the same manner as the fixture 34. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  Then, the installation method (assembly procedure) of the antenna device which concerns on Embodiment 3 is demonstrated. In the lower dielectric spacer placing step in the antenna device installation method according to the third embodiment, the first lower dielectric spacer 9, the second lower dielectric spacer 10, and the central lower dielectric spacer 8 are placed on the installation surface. The third lower dielectric spacer 22, the fourth lower dielectric spacer 23, and the central lower dielectric spacer 8 are placed on the installation surface. Originally, the first lower dielectric spacer 9 and the second lower dielectric spacer 10 (third lower dielectric spacer 22 and fourth lower dielectric spacer 23) and the central lower dielectric spacer 8 are disposed (fixed) on the installation surface. If it is provided or if the installation surface has a function of a dielectric spacer, the lower dielectric spacer placing step is not necessary.

  The lower columnar conductor installation step in the antenna device installation method according to the third embodiment includes the first sub columnar conductor 2, the second sub columnar conductor 3, the third sub columnar conductor 17, the fourth sub columnar conductor 18, and the first sub columnar conductor 18. The main columnar conductor 1 is erected on the installation surface, the first main columnar conductor 1 is disposed between the first subcolumnar conductor 2 and the second subcolumnar conductor 3, and the third subcolumnar conductor 17 and the second subcolumnar conductor 17 The first main columnar conductor 1 is arranged between the four sub columnar conductors 18. The lower-side columnar conductor electrical connection step in the antenna device installation method according to the third embodiment includes the first sub-columnar conductor 2 and the second sub-columnar conductor 3 as the first main columnar conductor 1 and the third sub-columnar conductor 17. The fourth sub columnar conductor 17 is electrically connected to the first main columnar conductor 1. Specifically, the step of connecting the first main columnar conductor 1 and the first sub columnar conductor 2 with the first connection conductor 11, and connecting the first main columnar conductor 1 and the second sub columnar conductor 3 with the second connection conductor 12. Connecting the first main columnar conductor 1 and the third sub columnar conductor 17 with the third connection conductor 19, connecting the first main columnar conductor 1 and the fourth sub columnar conductor 18 with the fourth connection conductor 20. Process. In addition, the implementation order of a lower side columnar conductor electrical connection process is not ask | required. It may be after the U-shaped conductor fixing step and the wiring step described later. Moreover, the lower side columnar conductor electrical connection step can be said to be reinforcement by the first connection conductor 11, the second connection conductor 12, the third connection conductor 19, and the fourth connection conductor 20, and therefore can be said to be a lower side columnar conductor reinforcement step. The upper-side columnar conductor installation step may be performed before the lower-side columnar conductor installation step in the antenna device installation method according to Embodiment 3. That is, in the lower columnar conductor installation step, the first main columnar conductor 1 to which the second main columnar conductor 4 is connected via the central upper dielectric spacer 5 is erected on the installation surface. In addition, a wiring process is performed after an upper side columnar conductor installation process (many after a U-shaped conductor fixing process).

  The U-shaped conductor fixing process in the installation method of the antenna device which concerns on Embodiment 3 is shown. In this U-shaped conductor fixing step, the U-shaped conductor 7 bent in a U-shape is formed on the surface opposite to the surface mounted on the tip portion of the first sub-columnar conductor 2 of the first upper dielectric spacer 13. One end is fixed (inserted), and the other end of the U-shaped conductor 7 is fixed (inserted) to the surface opposite to the surface placed on the tip of the second sub-columnar conductor 3 of the second upper dielectric spacer 14. The first U-shaped conductor fixing step of fixing the central portion of the U-shaped conductor 7 to the tip portion of the second main columnar conductor 4 and the tip portion of the third sub-columnar conductor 17 of the third upper dielectric spacer 24 One end of the second U-shaped conductor 21 bent in a U-shape is fixed (inserted) to the surface opposite to the surface on which it is placed, and the tip of the fourth sub-columnar conductor 18 of the fourth upper dielectric spacer 25 is fixed. The other end of the second U-shaped conductor 21 is fixed (inserted) to the surface opposite to the surface on which it is placed. The portion consisting of the first 2U shaped conductor fixing step of fixing the distal end portion of the second main columnar conductor 4. The order of execution of the first U-shaped conductor fixing step and the second U-shaped conductor fixing step does not matter. The central portion 7c of the U-shaped conductor 7 and the central portion 21c of the second U-shaped conductor 21 may be fixed simultaneously.

  In the present application, the third upper dielectric spacer 24 and the fourth upper dielectric spacer 25 have holes, and these holes are depressions that can be inserted into both ends of the thin second U-shaped conductor 21. Good. Accordingly, the third sub-columnar conductor 17 and the second U-shaped conductor 21 (one end) can be fixed by the fixture 35 without being conducted, and the fourth sub-columnar conductor 18 and the second U-shaped conductor 21 (the other end) can be fixed. Can be fixed by the fixture 35 without conducting. Prior to the U-shaped conductor fixing step, the third upper dielectric spacer 24 is placed on the tip portion (upper flange) of the third sub-columnar conductor 17 and the fourth sub-columnar conductor 18 is placed on the tip portion (upper flange). (4) An upper dielectric spacer placing step (upper dielectric spacer placing step for sub-columnar conductors) for placing the upper dielectric spacer 25 is performed. When the third upper dielectric spacer 17 and the fourth upper dielectric spacer 18 have the above-mentioned conical shape, a bolt hole is drilled on the lower side having a large diameter, and the third sub columnar conductor 17 and the fourth sub columnar conductor 18 are formed. What is necessary is just to fix to a front-end | tip part (upper flange) with fasteners, such as a volt | bolt.

  Therefore, the antenna device installation method according to Embodiment 3 can provide a small antenna device having a high gain with the vertical polarization as the main polarization, maintaining the gain of the main polarization of the dipole antenna, The symmetrical structure can not only obtain a dipole antenna with suppressed cross-polarized gain, but also the third sub-columnar conductor 17 and the fourth sub-columnar conductor 18 make it easier to carry, assemble and install. In addition, it is possible to obtain a dipole antenna or a monopole antenna that requires a small number of supporting members such as branch lines or is independent without a supporting member.

  The antenna device according to Embodiments 1 to 3 includes a first sub columnar conductor 2 (first support) and a second sub columnar conductor 3 arranged side by side with the first sub columnar conductor 2 (first support). (Second support), and the first sub-columnar conductor 2 (first support) and the second sub-columnar conductor 3 (second support) are arranged (intermediate) between the first sub-columnar conductor 2 ( A main columnar conductor 15 (first main columnar conductor 1) that is electrically connected to or insulated from the first support) and the second sub-columnar conductor 3 (second support); The other end opposite the tip of the second sub-columnar conductor 3 (second support), and the central portion of the first sub-columnar conductor 2 (first support). And a U-shaped conductor fixed to the tip of the main columnar conductor 15 (second main columnar conductor 4). The main columnar conductor 15 may be arranged only between the first sub columnar conductor 2 (first support) and the second sub columnar conductor 3 (second support) (intermediate). That is, the main columnar conductor 15 may not be electrically connected to the first sub-columnar conductor 2 (first support) and the second sub-columnar conductor 3 (second support), or may be the first sub-columnar conductor. The conductor 2 (first support) and the second sub-columnar conductor 3 (second support) may not be fixed in an insulated state.

  The antenna device installation method according to the first to third embodiments includes a first lower dielectric spacer 9 (first support) and a second lower dielectric spacer 19 (first support) placed on the installation surface (conductor ground plane 16). 2 support) and the central lower dielectric spacer 8, the first sub columnar conductor 2 (first support), the second sub columnar conductor 3 (second support), and the main columnar conductor 15 (first main columnar conductor 1). ) Are fixed, and the first sub columnar conductor 2 (first support), the second sub columnar conductor 3 (second support), and the main columnar conductor 15 (first main columnar conductor 1) are conductors. Standing on the ground plate 16 (installation surface), the main columnar conductor 15 (first main column conductor 15 (first main body)) is interposed between the first sub columnar conductor 2 (first support) and the second sub columnar conductor 3 (second support). Lower-side columnar conductor installation step for arranging columnar conductor 1) and first sub-column A lower part for electrically connecting the conductor 2 (first support) and the second sub-columnar conductor 3 (second support) to the main columnar conductor 15 (first main columnar conductor 1) or fixing them in an insulated state. Side columnar conductor electrical connection (lower side columnar body reinforcement) step (lower side columnar conductor installation step for electrically connecting first subcolumnar conductor 2 and second subcolumnar conductor 3 to conductor ground plate 16), One end of the U-shaped conductor 7 bent in a U-shape is fixed to the surface opposite to the surface placed on the tip portion of the first sub-columnar conductor (first support) of the dielectric spacer 13, The other end of the U-shaped conductor 7 is fixed to the surface opposite to the surface placed on the tip of the second sub-columnar conductor 3 "(second support) of the second upper dielectric spacer 14, U-shaped conductor for fixing the central portion of the conductor 7 to the tip of the main columnar conductor 15 (second main columnar conductor 4) It can be said that a fixing step. In addition, there is no lower side columnar conductor electrical connection (lower side columnar body reinforcement) step (lower side columnar conductor installation step for electrically connecting the first sub columnar conductor 2 and the second sub columnar conductor 3 to the conductor ground plate 16). Also good.

  The antenna devices according to the first to third embodiments maintain the gain of the linear (thin columnar) antenna, can be easily transported in a disassembled state, can be easily assembled and installed at the transport destination, branch lines, etc. Since the required number of support members is small or completely unnecessary, it is possible to obtain an antenna device and an antenna device installation method that require a small area for installation. Of course, the antenna device according to the first to third embodiments (and the installation method of the antenna device) can be applied to both a dipole antenna and a monopole antenna.

  In the present application, the first main columnar conductor 1, the first sub columnar conductor 2, the first sub columnar body 2d, the second sub columnar conductor 3, the second sub columnar body 3d, the second main columnar conductor 4, the upper second main The columnar conductor 4u, the lower second main columnar conductor 4d, the main columnar conductor 15, the upper main columnar conductor 15u, the lower main columnar conductor 15d, the third sub columnar conductor 17, and the fourth subcolumnar conductor 18 are hollow tubular. It may be. In addition, these tubular members (columnar conductors, columnar bodies) may have a structure that communicates from the base end (one end) to the tip end (the other end), or a non-node-like structure is present inside such as bamboo. A communication structure may be used. The non-communication structure contributes to securing strength. Even in a communication structure, a reinforcing material (structure) may be formed inside to ensure strength. The same is true for the U-shaped conductor 7 and the second U-shaped conductor 21. Of course, in the U-shaped conductor 7 and the second U-shaped conductor 21, it goes without saying that the non-communication structure and the communication structure with the reinforcing material (structure) contribute to ensuring the strength.

1 ·· First main columnar conductor, 2 ·· First sub columnar conductor, 2d ·· First sub columnar body, 3 ·· Second sub columnar conductor, 3d ·· Second sub columnar body, 4 ·· 2 Main columnar conductor, 4a, first plate conductor (upper flange), 4b, second plate conductor (mounting bracket), 4u, upper second main columnar conductor, 4d, lower second main Columnar conductor, 5 .. Center upper dielectric spacer, 6 .. Feeding portion, 7 .. U-shaped conductor (U-shaped conductor, П-shaped conductor), 7a .. First bent portion, 7b · Second bent portion, 7c · · central portion, 8 · · center lower dielectric spacer, 9 · · first lower dielectric spacer, 9m · · first lower conductor spacer, 10 · · second lower dielectric spacer, 10m ·· Second lower conductor spacer, 11 ·· First connection conductor, 11d ·· First connection body, 12 ·· Second connection conductor 12d ··· Second connection body 13 ··· First upper dielectric spacer 14 · · Second upper dielectric spacer 15 · · Main columnar conductor 15u · · · Upper main columnar conductor 15d · · · Lower main Columnar conductor, 16 .. Conductor ground plate (metal ground plate), 17 .. Third sub columnar conductor, 18 .. Fourth sub columnar conductor, 19 .. Third connection conductor, 20 .. Fourth connection conductor, 21 .. 2nd U-shaped conductor (2nd U-shaped conductor, 2 П-shaped conductor), 21a ·· 1st bent portion, 21b · · 2nd bent portion, 21c · · central portion, 22 · · · 3rd Lower dielectric spacer, 23... Fourth lower dielectric spacer, 24.. Third upper dielectric spacer, 25.. Fourth upper dielectric spacer, 34 .. Fixture (for U-shaped conductor 7), 45 ..Fixing device (for second U-shaped conductor 21).

Claims (2)

  A first sub-columnar conductor, a second sub-columnar conductor, and a main columnar conductor are erected on a conductor ground plane constituting a ground surface so as to be insulated from the conductor ground plane, and the first sub-columnar conductor, the second sub-columnar conductor, A lower columnar conductor installation step of disposing the main columnar conductor between the first columnar conductor, a lower columnar conductor electrical connection step of fixing the first subcolumnar conductor and the second subcolumnar conductor to the main columnar conductor, An upper dielectric spacer placing step of placing a first upper dielectric spacer on a tip portion of one sub-columnar conductor, and placing a second upper dielectric spacer on the tip portion of the second sub-columnar conductor; One end of a U-shaped conductor bent in a U-shape is fixed to a surface opposite to the surface placed on the tip portion of the first sub-columnar conductor of the first upper dielectric spacer, and the second upper dielectric spacer The second service of A U-shape that fixes the other end of the U-shaped conductor to a surface opposite to the surface placed on the front-end portion of the columnar conductor, and fixes the central portion of the U-shaped conductor to the front-end portion of the main columnar conductor. A method of installing an antenna device comprising: a conductor fixing step; and a wiring step of electrically connecting the power feeding portion to the main columnar conductor with one wiring and electrically connecting to the conductor ground plane with the other wiring.   A first sub-columnar conductor formed on the conductor ground plane constituting the ground surface and insulated from the conductor ground plane, and arranged on the conductor ground plane so as to be insulated from the conductor ground plane alongside the first sub-columnar conductor. A second sub columnar conductor, and the first sub columnar conductor and the second sub columnar conductor are arranged insulated from the conductor ground plane between the first sub columnar conductor and the second sub columnar conductor on the conductor ground plane; A main columnar conductor having a lower portion and a lower portion fixed to each of the columnar conductors, a power feeding unit electrically connected to the main columnar conductor by one wiring, and electrically connected to the conductor ground plane by the other wiring; It is bent in a letter shape, one end is opposed to the distal end portion of the first sub columnar conductor, the other end is opposed to the distal end portion of the second sub columnar conductor, and the central portion is fixed to the distal end portion of the main columnar conductor. With a U-shaped conductor For example was the antenna device.

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