JP2012039305A - Antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna device which achieves miniaturization while narrowing a beam width of a horizontal surface.SOLUTION: An antenna device comprises: a curved conductor which has a semi-cylindrical shape formed when a curve along a circular arc C whose central angle is almost 180 degrees moves in a z-direction almost vertical to a first plane surface on which the circular arc C is positioned; first and second linear conductors 1 and 2 provided on a surface parallel to the first plane surface inside the curved conductor; a first feeding point P1 provided between the first linear conductor and the curved conductor; and a second feeding point P2 provided between the second linear conductor and the curved conductor. The first and second linear conductors are excited by equal amplitudes in opposite phases, and are provided to be symmetrical in relation to a second plane surface which is vertical to a tangent line of a circular arc in the bisecting point of the circular arc C and passes through the bisecting point. Each length of the first and second linear conductors is set to be within a range from 0.1 λc to 0.3 λc with respect to a wave length λc of a center frequency in a designed frequency band.

Description

  The present invention relates to an antenna device for horizontal polarization used for mobile communication base stations and the like.

  Generally, in a mobile communication base station, the radio zone configuration is 3 sectors or 6 sectors. In the 6-sector configuration, an antenna having a horizontal plane beam width (3 dB beam width) of 60 degrees is used. However, in order to cope with an increase in the number of users, the beam width is further narrowed to 45 degrees. Demand for antennas is expected.

  Further, in the antenna device of the mobile communication base station, the antenna is housed in a cylindrical dielectric cover (radome). From the viewpoint of reducing the wind pressure load and ease of installation, the cylindrical dielectric cover is used. There is a demand to make the diameter of each as small as possible.

  Conventionally, as an antenna device for horizontally polarized waves in a mobile communication base station, two dipole elements are arranged in the horizontal direction in front of a reflector and excited with equal amplitude in-phase, and each dipole element has an asymmetric structure. A technique for obtaining a narrow beam has been proposed (see, for example, Patent Document 1).

  In the antenna device described in Patent Document 1, it is necessary to arrange two dipole elements having a length of approximately λc / 2 in the horizontal direction with respect to the wavelength λc at the center frequency fc in the design frequency band.

  On the other hand, as another conventional device, two monopole elements are inclined with respect to a planar ground conductor so that the tips approach each other, and power is supplied to each monopole element with an equal amplitude reverse phase. A technique for adjusting the horizontal plane beam width is also proposed (for example, see Patent Document 2).

JP 2007-295277 A JP-A-10-335929

In the conventional antenna device, in the configuration of Patent Document 1, since it is necessary to arrange two dipole elements of approximately λc / 2 in the horizontal direction, the diameter of the cylindrical cover for housing the antenna becomes relatively large. There was a problem that it was difficult to achieve miniaturization.
Further, the configuration of Patent Document 2 has a problem that it becomes difficult to narrow the horizontal beam width to 45 degrees.

  The present invention has been made to solve the above-described problems, and in a horizontally polarized antenna device, the horizontal width of the beam width can be sufficiently narrowed, and a reduction in size has been realized. An object is to obtain an antenna device.

  The antenna device according to the present invention is formed when a curve along a circular arc that is a part of a circle and has a central angle of approximately 180 degrees moves in a direction substantially perpendicular to the first plane on which the circular arc is located. A curved conductor having a semi-cylindrical shape, first and second linear conductors disposed on a plane parallel to the first plane inside the curved conductor, and the first linear conductor And a first feeding point installed between the curved conductor and a second feeding point installed between the second linear conductor and the curved conductor, the first and second An antenna device in which a linear conductor is excited with an equal amplitude opposite phase, and the first and second linear conductors are perpendicular to the arc tangent at the bisection point of the arc and pass through the bisection point The second plane is installed so as to be plane-symmetrical, and the lengths of the first and second linear conductors are within the design frequency band. With respect to the wavelength λc at the frequency, in which is set within the range of 0.1Ramudashi～0.3Ramudashi.

  According to the present invention, the beam width of the horizontal plane can be narrowed and the antenna device can be miniaturized.

It is an upper surface perspective view which shows the antenna apparatus which concerns on Embodiment 1 of this invention. It is an upper surface top view which shows the antenna apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the radiation pattern of the horizontal surface of the antenna apparatus which concerns on Embodiment 1 of this invention. It is an upper surface perspective view which shows the antenna apparatus which concerns on Embodiment 2 of this invention. It is an upper surface top view which shows the antenna device which concerns on Embodiment 2 of this invention. It is an upper surface perspective view which shows the antenna apparatus which concerns on Embodiment 3 of this invention. It is an upper surface top view which shows the antenna device which concerns on Embodiment 3 of this invention. It is an upper surface perspective view which shows the antenna apparatus which concerns on Embodiment 4 of this invention. It is an upper surface top view which shows the antenna apparatus which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows the radiation pattern of the horizontal surface of the antenna device which concerns on Embodiment 4 of this invention. It is an upper surface perspective view which shows the antenna device which concerns on Embodiment 5 of this invention. It is an upper surface top view which shows the antenna apparatus which concerns on Embodiment 5 of this invention. It is an upper surface perspective view which shows the antenna device which concerns on Embodiment 6 of this invention. It is an upper surface top view which shows the antenna apparatus which concerns on Embodiment 6 of this invention. It is a top perspective view which shows the antenna apparatus which concerns on Embodiment 7 of this invention. It is an upper surface top view which shows the antenna apparatus which concerns on Embodiment 7 of this invention.

Embodiment 1 FIG.
Hereinafter, an antenna device according to Embodiment 1 of the present invention will be described with reference to FIGS.
1 and 2 show an antenna apparatus according to Embodiment 1 of the present invention. FIG. 1 is a top perspective view, and FIG. 2 is a top plan view.

  FIG. 3 is an explanatory diagram showing a radiation pattern on the horizontal plane of the antenna device according to Embodiment 1 of the present invention, in which the horizontal axis is the separation angle φ [deg] from the x axis, and the vertical axis is φ = 0 [deg]. Relative amplitude [dB] with a gain of 0 dB.

  1 and 2, the antenna device includes linear monopole conductors 1 and 2 (first and second linear conductors) disposed on a first plane parallel to the xy plane, A semi-cylindrical ground conductor 100 (curved conductor) extended in the z-direction orthogonal to the xy plane, and a first installed between the linear monopole conductor 1 and the semi-cylindrical ground conductor 100. Feed point P1 and a second feed point P2 installed between the linear monopole conductor 2 and the semi-cylindrical ground conductor 100. The linear monopole conductors 1 and 2 have the same amplitude. It is configured to excite in reverse phase.

The semi-cylindrical ground conductor 100 is a part of a circle, and a curve along an arc C having a central angle of approximately 180 degrees is a first plane in which the arc C is located (a plane parallel to the xy plane). ) Having a semi-cylindrical shape that is formed when moving in a direction substantially perpendicular to (z direction).
In addition, although the semicylindrical ground conductor 100 is shown in a substantially semicylindrical shape, as shown in a seventh embodiment to be described later, a polyhedral shape in a broad sense is also generically included.

The linear monopole conductors 1 and 2 are installed inside the semi-cylindrical ground conductor 100.
The lengths of the linear monopole conductors 1 and 2 are set in the range of 0.1λc to 0.3λc with respect to the wavelength λc at the center frequency fc in the design frequency band.

In FIG. 2, the second plane 200 (a plane parallel to the zx plane) is parallel to the height direction (z direction) of the semicylindrical ground conductor 100 and the semicylindrical ground conductor. 100 is divided into two equal parts.
That is, the second plane 200 is perpendicular to the tangent of the arc C at the bisector of the arc C and passes through the bisector of the arc C.
The linear monopole conductors 1 and 2 are installed on the first plane parallel to the xy plane so as to be plane-symmetric with respect to the second plane 200.

  The angle formed between the tangent in the first plane at the first feeding point P1 to the linear monopole conductor 1 on the semicylindrical ground conductor 100 and the linear monopole conductor 1 is in the range of 45 degrees to 135 degrees. And is adjusted so that a desired horizontal plane beam width and reflection characteristics can be obtained. The linear monopole conductor 2 is also adjusted in the same manner as the linear monopole conductor 1.

  The distance between the first feeding point P1 for the linear monopole conductor 1 and the second feeding point P2 for the linear monopole conductor 2 is set in the range of 0.4λc to 1.0λc. Shall.

Next, the operation according to the first embodiment of the present invention shown in FIGS. 1 and 2 will be described.
First, the linear monopole conductors 1 and 2 are installed so as to face each other and are excited with an equal amplitude opposite phase. Thereby, in the front direction (x direction) of the antenna device, the phase of the radiated electromagnetic field is aligned, so that a beam having directivity in the x direction is formed.

At this time, since the semi-cylindrical ground conductor 100 is located on the back surface (−x direction) of the linear monopole conductors 1 and 2, the radiation level in the −x direction becomes very small.
Further, since the linear monopole conductors 1 and 2 are installed on the semi-cylindrical ground conductor 100, even when the diameter of a cylindrical cover (not shown) for housing the antenna device is reduced, the horizontal plane ( The beam width of (xy plane) can be made sufficiently narrow.

  In order to sufficiently reduce the beam width of the horizontal plane (xy plane) and reduce it to about 45 ° ± 10 °, the cylindrical diameter forming the curved surface of the semicylindrical ground conductor 100 is set to 0.84λc to 1.12λc. It may be set within the range.

FIG. 3 shows an example of the calculation result of the radiation pattern of horizontally polarized waves. The diameter of the semicylindrical ground conductor 100 is 0.98λc, the lengths of the linear monopole conductors 1 and 2 are 0.19λc, and the first The horizontal plane radiation pattern at the center frequency fc is shown when the distance between the feeding point P1 and the second feeding point P2 is 0.75λc.
As can be seen from FIG. 3, the horizontal beam width Wh in the horizontally polarized wave is 49 degrees, which is sufficiently narrow.

  The height of the semi-cylindrical ground conductor 100 is arbitrary as long as the ± z-direction ends of the semi-cylindrical ground conductor 100 are separated from the first and second feeding points P1, P2 by 0.3λc or more. May be the height.

  The cross-sectional shape perpendicular to the z direction of the semicylindrical ground conductor 100 (by a plane parallel to the xy plane) may be substantially semicircular, and the height direction of the semicylindrical ground conductor 100 ( The z direction) may be substantially perpendicular to the xy plane.

  Further, in FIG. 1 and FIG. 2, the linear monopole conductors 1 and 2 are installed one by one. However, a plurality of linear monopole conductors 1 and 2 are arranged every 0.5λc to 1.0λc in the z direction. May be arranged side by side to operate as an array antenna. As a result, the antenna gain can be increased.

  As described above, according to the first embodiment (FIGS. 1 and 2) of the present invention, inside the semicylindrical ground conductor 100, with respect to the height direction (z direction) of the semicylindrical ground conductor 100. By installing the linear monopole conductors 1 and 2 that are almost vertical and exciting the linear monopole conductors 1 and 2 with the same amplitude in phase, the beam width Wh in the horizontal plane (xy plane) is narrow and small. A horizontally polarized antenna device can be realized.

Embodiment 2. FIG.
Although not particularly mentioned in the first embodiment (FIGS. 1 and 2), as shown in FIGS. 4 and 5, the directivity adjusting linear conductor 21 (in front of the linear monopole conductors 1 and 2 ( You may install the 1st directivity adjustment linear conductor.
4 and 5 show an antenna device according to Embodiment 2 of the present invention. FIG. 4 is a top perspective view and FIG. 5 is a top plan view.

  4 and 5, the same components as those described above (see FIGS. 1 and 2) are denoted by the same reference numerals as those described above and will not be described in detail. The same applies to the reference numerals in the following embodiments 3 to 7 (FIGS. 6 to 16).

The directivity adjusting linear conductor 21 is installed in the same first plane as the linear monopole conductors 1 and 2, and is installed so as to be substantially orthogonal to the second plane 200.
The directivity adjusting linear conductor 21 is in a cylindrical surface overlapping the semi-cylindrical ground conductor 100 (in a cylindrical surface formed when the circle moves in a direction substantially perpendicular to the first plane). Is arranged.

  Further, the bisection point of the directivity adjusting linear conductor 21 is located on the second plane 200 (see FIG. 5), and the length of the directivity adjusting linear conductor 21 is 0.2λc. It is set within the range of ~ 0.6λc.

  As described above, according to the second embodiment (FIGS. 4 and 5) of the present invention, in addition to the above-described configuration (FIGS. 1 and 2), the second plane is located on the first plane. The directivity adjusting linear conductor 21 (first directivity adjusting linear conductor) is provided so as to be substantially orthogonal to 200.

  As described above, by arranging the directivity adjusting linear conductor 21 in front of the linear monopole conductors 1 and 2, the directivity adjusting linear conductor 21 operates as a director. In addition to the same effect as in the first aspect, the horizontal plane beam width Wh can be further reduced, and the side lobe level of the horizontal plane can be reduced.

Embodiment 3 FIG.
Although not particularly mentioned in the second embodiment (FIGS. 4 and 5), as shown in FIGS. 6 and 7, a non-excited linear conductor 3 is provided in the vicinity of the linear monopole conductors 1 and 2, respectively. 4 (third and fourth linear conductors) are additionally installed, and the linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 are configured by planar conductors having a width in the z direction. May be.
6 and 7 show an antenna apparatus according to Embodiment 3 of the present invention. FIG. 6 is a top perspective view and FIG. 7 is a top plan view.

6 and 7, the non-excited linear conductor 3 is installed in parallel in the vicinity of the linear monopole conductor 1, and one end is connected to the semicylindrical ground conductor 100.
Similarly, the non-excited linear conductor 4 is installed in parallel in the vicinity of the linear monopole conductor 2 and one end is connected to the semi-cylindrical ground conductor 100.

The non-excited linear conductors 3 and 4 are installed so as to be substantially parallel to the plane on which the linear monopole conductors 1 and 2 are located, and so as to be plane-symmetric with respect to the second plane 200. (See FIG. 7).
The linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 are each composed of a planar conductor having a width in the z direction.

  Each length of the non-excited linear conductors 3 and 4 is set in the range of 0.1λc to 0.3λc. The distance between the linear monopole conductor 1 and the non-excited linear conductor 3 and the distance between the linear monopole conductor 2 and the non-excited linear conductor 4 are set to 0.1λc or less, respectively. ing.

  6 and 7 show a case where the linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 are rectangular, it is not limited to a rectangle, but a triangle, Any shape such as a pentagon may be applied.

  As described above, according to the third embodiment of the present invention (FIGS. 6 and 7), in addition to the configuration described above (FIGS. 4 and 5), it is installed near each of the linear monopole conductors 1 and 2. The non-excited linear conductors 3 and 4 are provided, and the linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 are configured by planar conductors having a width in the z direction. .

In this way, by installing the non-excited linear conductors 3 and 4 in the vicinity of the linear monopole conductors 1 and 2, in addition to the same effects as those of the second embodiment, the antenna reflection characteristics can be broadened. Can be
Further, by configuring the linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 with planar conductors having a width, the reflection characteristics of the antenna can be further broadened.

Embodiment 4 FIG.
Although not particularly mentioned in the second embodiment (FIGS. 4 and 5), as shown in FIGS. 8 and 9, substantially parallel to the height direction (z direction) of the semi-cylindrical ground conductor 100 ( Two linear dipole conductors 51 and 52 (fifth and sixth linear conductors) and two (one or more) directivity adjusting linear conductors substantially perpendicular to the first plane) 61 may be installed to constitute an antenna device for sharing orthogonal polarization (horizontal polarization and vertical polarization).

8 and 9 show an antenna device according to Embodiment 4 of the present invention. FIG. 8 is a top perspective view and FIG. 9 is a top plan view.
FIG. 10 is an explanatory diagram showing a radiation pattern on the horizontal plane of the antenna device according to the fourth embodiment of the present invention. As in FIG. 3, the horizontal axis is the separation angle φ [deg] from the x axis, The vertical axis represents the relative amplitude [dB] where the gain at φ = 0 [deg] is 0 dB.

  In FIG. 8 and FIG. 9, the linear dipole conductors 51 and 52 are disposed substantially parallel to the height direction (z direction) of the semicylindrical ground conductor 100 and are plane-symmetric with respect to the second plane 200. It is installed to become.

In addition, each bisection point of the linear dipole conductors 51 and 52 is located on the first plane on which the linear monopole conductors 1 and 2 are located, and each length of the linear dipole conductors 51 and 52 is It is set within the range of 0.2λc to 0.6λc.
As shown in FIG. 8, third and fourth feeding points P3 and P4 are provided at the bisecting points of the linear dipole conductors 51 and 52, and the linear dipole conductors 51 and 52 have the same amplitude in-phase. It is configured to excite.

As shown in FIG. 9, the directivity adjusting linear conductor 61 substantially parallel to the z direction is installed on the second plane 200. The directivity adjusting linear conductor 61 is not limited to two, and may be only one or three or more.
The linear dipole conductors 51 and 52 and the directivity adjusting linear conductor 61 are installed in a cylinder overlapping the semi-cylindrical ground conductor 100.

In this way, by installing the linear dipole conductors 51 and 52 substantially parallel to the height direction (z direction) of the semicylindrical ground conductor 100 and exciting them with the same amplitude and in-phase, vertical polarization is excited. Therefore, it can be operated as an orthogonal polarization shared antenna.
Thereby, polarization diversity can be realized and multipath fading can be suppressed.

At this time, in the base station antenna, the beam width Wv in the horizontal polarization is required to be approximately equal to the beam width Wv in the vertical polarization and the beam width Wh in the horizontal polarization. In order to reduce the width, two linear dipole conductors 51 and 52 are provided.
Further, by installing two (one or more) directivity adjusting linear conductors 61, the side lobe level can be reduced at a high frequency within the use frequency band.

FIG. 10 shows an example of a vertical polarization radiation pattern calculation result. The diameter of the semicylindrical ground conductor 100 is 0.98λc, the lengths of the linear dipole conductors 51 and 52 are 0.45λc, and the linear dipole is shown. The horizontal plane radiation pattern at the center frequency fc is shown when vertical polarization is excited with the distance between the third feeding point P3 for the conductor 51 and the fourth feeding point P4 for the linear dipole conductor 52 being 0.67λc. ing.
As is apparent from FIG. 10, the horizontal plane beam width Wv in the vertical polarization is 49 degrees, which is as narrow as the beam width Wh of the horizontal polarization.

  As described above, the antenna device according to Embodiment 4 (FIGS. 8 and 9) of the present invention has the linear dipole conductors 51 and 52 (fifth and fifth) installed substantially perpendicular to the first plane. 6 linear conductors), one or more directivity adjusting linear conductors 61 (second directivity adjusting linear conductors) installed substantially perpendicular to the first plane, and a linear dipole. A third feeding point P3 installed at the bisection point of the conductor 51 and a fourth feeding point P4 installed at the bisection point of the linear dipole conductor 52 are provided.

  The linear dipole conductors 51 and 52 are installed so as to be plane-symmetric with respect to the second plane 200, and are installed in a cylinder overlapping the semicylindrical ground conductor 100. The third and fourth feeding points Excited with equal amplitude in phase via P3 and P4.

The bisection points of the linear dipole conductors 51 and 52 are located on the first plane, and the lengths of the linear dipole conductors 51 and 52 are set within the range of 0.2λc to 0.6λc. ing.
The directivity adjusting linear conductor 61 is installed on the second plane 200 and is installed in a cylindrical surface overlapping the semicylindrical ground conductor 100.

  Thus, in addition to the configuration described above (FIGS. 4 and 5), the linear dipole conductors 51 and 52 and the directivity adjusting linear conductor 61 are arranged in the height direction (z direction) of the semicylindrical ground conductor 100. By installing them in parallel with each other, it is possible to realize a cross-polarized antenna device that has small horizontal beam widths Wh and Wv, is small, and has a low sidelobe level in the horizontal plane.

Embodiment 5 FIG.
Although not particularly mentioned in the fourth embodiment (FIGS. 8 and 9), as shown in FIGS. 11 and 12, the linear monopole conductors 1 and 2 (first and second linear conductors) Non-excited linear conductors 3 and 4 (third and fourth linear conductors) are installed in the vicinity, and non-excited linear conductors 51 and 52 (fifth and sixth linear conductors) are non-exposed. Excited linear conductors 53 and 54 (seventh and eighth linear conductors) are installed, and linear monopole conductors 1 and 2, linear dipole conductors 51 and 52, and non-excited linear conductors 3 and 4 are provided. , 53 and 54 may be formed of planar conductors each having a width in the z direction.

11 and 12 show an antenna apparatus according to Embodiment 5 of the present invention. FIG. 11 is a top perspective view, and FIG. 12 is a top plan view.
11 and 12, the non-excited linear conductor 3 is installed in the vicinity of the linear monopole conductor 1 and has one end connected to the semi-cylindrical ground conductor 100, as described above (FIGS. 6 and 7). Has been.

Similarly, the non-excited linear conductor 4 is installed in the vicinity of the linear monopole conductor 2, and one end is connected to the semicylindrical ground conductor 100.
The non-excited linear conductors 3 and 4 are installed in parallel to the first plane on which the linear monopole conductors 1 and 2 are located, and are set to be plane-symmetric with respect to the second plane 200. The

On the other hand, the non-excited linear conductor 53 (seventh linear conductor) is installed in the vicinity of the linear dipole conductor 51 (fifth linear conductor), and the non-excited linear conductor 54 (eighth wire). The linear conductor) is disposed in the vicinity of the linear dipole conductor 52 (sixth linear conductor).
Further, the non-excited linear conductors 53 and 54 are installed so as to be substantially perpendicular to the plane on which the linear monopole conductors 1 and 2 are positioned and symmetrical with respect to the second plane 200 (see FIG. 12).

  Further, the linear monopole conductors 1 and 2 and the non-excited linear conductors 3 and 4 are respectively constituted by planar conductors having a width in the z direction, and the linear dipole conductors 51 and 52, and The non-excited linear conductors 53 and 54 are each composed of a planar conductor having a width in the y direction (see FIG. 11).

As described above, the non-excited linear conductors 3, 4, 53, 54 are provided in the vicinity of the linear monopole conductors 1, 2 and the linear dipole conductors 51, 52, thereby improving the reflection characteristics of the antenna device over a wide band. Can be
Further, the linear monopole conductors 1 and 2, the linear dipole conductors 51 and 52, and the non-excited linear conductors 3 and 4 are constituted by planar conductors having a width, thereby further improving the reflection characteristics of the antenna device. Can be

  At this time, the lengths of the non-excited linear conductors 3 and 4 are set in the range of 0.1λc to 0.3λc, and the lengths of the non-excited linear conductors 53 and 54 are 0.2λc. It is assumed that it is set within the range of ~ 0.6λc.

  Further, the distance between the linear monopole conductor 1 and the non-excited linear conductor 3, the distance between the linear monopole conductor 2 and the non-excited linear conductor 4, the linear dipole conductor 51 and the non-excited linear conductor. The distance between the linear dipole conductor 52 and the non-excited linear conductor 54 is set to 0.1λc or less.

  11 and 12 show a case where the linear monopole conductors 1 and 2, the linear dipole conductors 51 and 52, and the non-excited linear conductors 3, 4, 53, and 54 are rectangular, The shape is not limited to a rectangle, and any shape such as a triangle or a pentagon may be applied.

  As described above, the antenna device according to Embodiment 5 (FIGS. 11 and 12) of the present invention has the linear monopole conductor 1 (first wire) in addition to the configuration described above (FIGS. 8 and 9). Non-excited linear conductor 3 (third linear conductor) installed in the vicinity of the linear conductor) and non-excited line installed in the vicinity of the linear monopole conductor 2 (second linear conductor) A linear conductor 3 (fourth linear conductor), a non-excited linear conductor 53 (seventh linear conductor) installed in the vicinity of the linear dipole conductor 51 (fifth linear conductor), A non-excited linear conductor 54 (eighth linear conductor) installed in the vicinity of the cylindrical dipole conductor 52 (sixth linear conductor).

The non-excited linear conductors 53 and 54 (seventh and eighth linear conductors) are installed so as to be substantially perpendicular to the first plane and symmetrical with respect to the second plane 200. The lengths of the non-excited linear conductors 53 and 54 are set within the range of 0.2λc to 0.6λc.
Moreover, the 1st-8th linear conductors 1-4, 51-54 are respectively comprised by the planar conductor which has a width | variety.

  Thus, the linear monopole conductors 1 and 2, the directivity adjusting linear conductor 21, the linear dipole conductors 51 and 52, the directivity adjusting linear conductor 61, and the non-excited linear conductors 3, 4 , 53, and 54, and the linear monopole conductors 1 and 2, linear dipole conductors 51 and 52, and non-excited linear conductors 3, 4, 53, and 54 are constituted by planar conductors having a width. Accordingly, it is possible to realize an orthogonally polarized wave shared antenna apparatus having a narrow horizontal beam width, a small size, a low sidelobe level in the horizontal plane, and a wide reflection characteristic.

Embodiment 6 FIG.
In Embodiments 4 and 5 (FIGS. 8, 9, 11, and 12), one or more directivity adjusting linear conductors 61 are used, but the directivity adjusting linear conductors 61 are used instead. As shown in FIG. 13 and FIG. 14, a directivity adjusting planar conductor 62 installed on the second plane 200 may be used.
13 and 14 show an antenna device according to Embodiment 6 of the present invention. FIG. 13 is a top perspective view, and FIG. 14 is a top plan view.

  13 and 14, on the second plane 200 in the semicylindrical ground conductor 100, a directivity adjustment plane is used instead of the directivity adjustment linear conductor 61 described above (FIGS. 11 and 12). A conductor 62 is provided. The directivity adjusting planar conductor 62 is installed in a cylinder overlapping the semicylindrical ground conductor 100.

  Thus, by replacing the directivity adjusting linear conductor 61 with the directivity adjusting planar conductor 62, the number of parts and the positioning process are reduced, so the effect of the fifth embodiment is maintained. However, the manufacturing process can be simplified.

  In addition, although the case where it applies to the structure of above-mentioned Embodiment 5 (FIG. 11, FIG. 12) is shown here, it is applicable to any of above-mentioned Embodiment 1-4, and an equivalent effect | action Needless to say, it has an effect.

  As described above, the antenna device according to Embodiment 6 (FIGS. 13 and 14) of the present invention replaces the directivity adjusting linear conductor 61 described above (FIGS. 11 and 12) with the second plane. Since the planar conductor 62 for directivity adjustment installed on 200 is installed, the horizontal plane beam width is narrow and small, the side plane lobe level of the horizontal plane is low, and reflection is performed, as in the fifth embodiment. It is possible to realize a cross-polarization dual-polarized antenna device having a wide bandwidth.

Embodiment 7 FIG.
In the first to sixth embodiments, the case where the semi-cylindrical ground conductor 100 is configured in a substantially semi-cylindrical shape is shown. However, as shown in FIGS. 15 and 16, the multi-cylindrical ground conductor 101 (polyhedral conductor) is replaced. May be.
15 and 16 show an antenna apparatus according to Embodiment 7 of the present invention. FIG. 15 is a top perspective view, and FIG. 16 is a top plan view.

15 and 16, the antenna device includes a polyhedral ground conductor 101 instead of the semi-cylindrical ground conductor 100 described above (FIGS. 11 and 12).
The polyhedral ground conductor 101 is a straight line that sequentially connects adjacent points of three or more points A (see FIG. 16) on the semi-cylindrical ground conductor 100 on the first plane (a plane parallel to the xy plane). It has a polyhedral shape formed when the line D, which is a combination of the straight lines B connected at, is moved in the z direction (direction substantially perpendicular to the xy plane).

  Moreover, the 1st-4th linear conductors 1-4 are installed on the 1st plane, and each end is connected to the polygonal line D. As shown in FIG.

  Thus, by replacing the semi-cylindrical ground conductor 100 with the polyhedral ground conductor 101, the positioning and attachment of each of the linear conductors 1 to 4 is facilitated, so that while maintaining the effects of the above-described Embodiment 5, Manufacturing can be simplified.

  As described above, in the antenna device according to Embodiment 7 (FIGS. 15 and 16) of the present invention, the semi-cylindrical ground conductor 100 is constituted by the multi-plane ground conductor 101, and the height of the multi-plane ground conductor 101 is increased. The linear monopole conductors 1 and 2 that are substantially perpendicular to the direction (z direction) are installed and excited in the same amplitude in-phase, and the directivity adjusting linear conductor 21 is placed in front of the linear monopole conductors 1 and 2. The linear dipole conductors 51 and 52 and the directivity adjusting planar conductor 62 are installed substantially parallel to the z direction, and the vicinity of each of the linear monopole conductors 1 and 2 and the linear dipole conductors 51 and 52 is installed. Are provided with non-excited linear conductors 3, 4, 53, 54, linear monopole conductors 1, 2, linear dipole conductors 51, 52 and non-excited linear conductors 3, 4, 53, 54, It is composed of a planar conductor having a width in the z direction.

The polyhedral ground conductor 101 has a line D, which is a combination of straight lines B connecting adjacent points among three or more points A on the semi-cylindrical ground conductor 100 in the first plane, on the first plane. It has a polyhedral shape formed when it moves in a direction substantially perpendicular to it.
As a result, it is possible to realize an orthogonally polarized wave shared antenna apparatus having a narrow horizontal beam width, a small size, a low sidelobe level in the horizontal plane, and a wide reflection characteristic, and can be easily manufactured.

Here, the polyhedral ground conductor 101 is applied to the configuration of FIG. 11 and FIG. 12 (Embodiment 5), but it can also be applied to any configuration according to other embodiments, and the equivalent effect is achieved. Needless to say, it has an effect.
Moreover, it is also possible to combine the structure of the said Embodiments 1-7 arbitrarily, and in any case, each effect can be show | played synergistically.

  1 linear monopole conductor (first linear conductor), 2 linear monopole conductor (second linear conductor), 3 non-excited linear conductor (third linear conductor), 4 non-excited Linear conductor (fourth linear conductor), 21 Linear conductor for directivity adjustment (first linear conductor for directivity adjustment), 51 Linear dipole conductor (fifth linear conductor), 52 Linear Dipole conductor (sixth linear conductor), 53 Non-excited linear conductor (seventh linear conductor), 54 Non-excited linear conductor (eighth linear conductor), 61 Linearity for directivity adjustment Conductor (second directivity adjusting linear conductor), 62 directivity adjusting planar conductor, 100 semi-cylindrical ground conductor (curved conductor), 101 polyhedral ground conductor, 200 second plane, point A 2, B straight line, C circular arc, D polygonal circular arc, P1 first feeding point, P2 second feeding point, P3 third feeding point, P4 fourth Feeding point, Wh horizontally polarized beam width, beam width Wv vertical polarization.

Claims (12)

A curve along a circular arc that is a part of a circle and has a central angle of approximately 180 degrees has a semi-cylindrical shape that is formed when the curve moves in a direction substantially perpendicular to the first plane on which the circular arc is located. A curved conductor;
First and second linear conductors installed on a plane parallel to the first plane inside the curved conductor;
A first feeding point installed between the first linear conductor and the curved conductor;
A second feeding point installed between the second linear conductor and the curved conductor;
An antenna device in which the first and second linear conductors are excited with an equal amplitude opposite phase,
The first and second linear conductors are disposed so as to be perpendicular to a tangent of the arc at a bisection point of the arc and to be plane-symmetric with respect to a second plane passing through the bisection point. And
Each of the lengths of the first and second linear conductors is set within a range of 0.1λc to 0.3λc with respect to the wavelength λc at the center frequency of the design frequency band. . A first directivity adjusting linear conductor located on the first plane and installed so as to be substantially orthogonal to the second plane;
The first directivity adjusting linear conductor is installed in a cylindrical surface formed when the circle moves in a direction substantially perpendicular to the first plane;
2. The antenna device according to claim 1, wherein a bisection point of the first directivity adjusting linear conductor is located on the second plane.   The antenna device according to claim 1, wherein each of the first and second linear conductors is a planar conductor having a width. A third linear conductor installed in the vicinity of the first linear conductor;
A fourth linear conductor installed in the vicinity of the second linear conductor,
The third and fourth linear conductors are installed substantially parallel to the first plane and are set to be plane-symmetric with respect to the second plane;
Each one end of the third and second linear conductors is connected to the curved conductor,
4. The length of each of the third and fourth linear conductors is set within a range of 0.1λc to 0.3λc. 5. Antenna device.   The antenna device according to claim 4, wherein each of the third and fourth linear conductors is a planar conductor having a width. Fifth and sixth linear conductors disposed substantially perpendicular to the first plane;
One or more second directivity adjusting linear conductors installed substantially perpendicular to the first plane;
A third feeding point installed at a bisection point of the fifth linear conductor;
A fourth feeding point installed at a bisection point of the sixth linear conductor,
The fifth and sixth linear conductors are disposed so as to be plane-symmetric with respect to the second plane, and are formed when the circle moves in a direction substantially perpendicular to the first plane. Installed in a cylindrical surface to be excited with equal amplitude in-phase through the third and fourth feeding points,
Each bisector of the fifth and sixth linear conductors is located on the first plane,
Each length of the fifth and sixth linear conductors is set within a range of 0.2λc to 0.6λc,
6. The first directivity adjusting linear conductor according to claim 1, wherein the second directivity adjusting linear conductor is disposed on the second plane and is disposed in the cylindrical surface. The antenna device according to item. Fifth and sixth linear conductors disposed substantially perpendicular to the first plane;
A planar conductor for directivity adjustment installed on the second plane;
A third feeding point installed at a bisection point of the fifth linear conductor;
A fourth feeding point installed at a bisection point of the sixth linear conductor,
The fifth and sixth linear conductors are disposed so as to be plane-symmetric with respect to the second plane, and are formed when the circle moves in a direction substantially perpendicular to the first plane. Installed in a cylindrical surface to be excited with equal amplitude in-phase through the third and fourth feeding points,
Each bisector of the fifth and sixth linear conductors is located on the first plane,
6. The length of each of the fifth and sixth linear conductors is set within a range of 0.2λc to 0.6λc, according to any one of claims 1 to 5. Antenna device.   The antenna device according to claim 6 or 7, wherein each of the fifth and sixth linear conductors is a planar conductor having a width. A seventh linear conductor installed in the vicinity of the fifth linear conductor;
An eighth linear conductor installed in the vicinity of the sixth linear conductor;
The seventh and eighth linear conductors are installed substantially perpendicular to the first plane and are set to be plane-symmetric with respect to the second plane;
9. The length of each of the seventh and eighth linear conductors is set within a range of 0.2λc to 0.6λc. 9. Antenna device.   The antenna device according to claim 9, wherein each of the seventh and eighth linear conductors is a planar conductor having a width. The curved conductor is a polyhedral conductor,
The polyhedral conductor is formed when a combination of straight lines connecting adjacent points among three or more points on the curve along the arc moves in a direction substantially perpendicular to the first plane. The antenna device according to any one of claims 1 to 10, wherein the antenna device has a polyhedral shape to be formed.   12. The antenna device according to claim 1, wherein a diameter of the circle is set in a range of 0.84λc to 1.12λc.

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