JP2000174551A - Antenna system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna system that realizes a high gain by using an electromagnetic coupling coaxial dipole array antenna. SOLUTION: The antenna system consists of a plurality of units placed in parallel each comprising an electromagnetic coupling coaxial dipole array antenna to which a phase shifter 6 and a transmission reception module 7 are connected. The electromagnetic coupling coaxial dipole array antenna is configured by a plurality of series connected element antennas in an extension direction of a coaxial line. The element antenna consists of the coaxial line, an outer conductor 1 enclosing the coaxial line, a feeding slit 3 which is set nearly perpendicular to the extension direction of the coaxial line and parts the outer conductor 1, and a radiation conductor 4 that is formed to be a pipe, through which the coaxial line and the outer conductor are inserted, surrounds the feeding slit 3 with an electric length of about 1/2 wavelength with respect to the operating frequency band and whose center axis is coincident with the center axis of the coaxial line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used for radar, communication, and the like.

[0002]

2. Description of the Related Art Miyashita, Omine,
Chatani, Makino, "Electromagnetically coupled coaxial dipole array antenna", Proceedings of the 1995 IEICE Communication Society Conference, B-95, p.95, IEICE, 1995, FIG. 6 shows the result. FIG. 6 is a configuration diagram showing a configuration of a conventional antenna device. In FIG. 6, 1 is an outer coaxial conductor, 2 is an inner coaxial conductor,
Reference numeral 3 denotes a feeding slit, and 4 denotes a radiation conductor. The outer coaxial conductor 1 and the inner coaxial conductor 2 constitute a coaxial feed line.
The conventional antenna device is composed of the outer coaxial conductor 1, the inner coaxial conductor 2, the feeding slit 3, and the radiating conductor 4,
It is called an electromagnetically coupled coaxial dipole array antenna.

Next, the operation of the conventional antenna device shown in FIG. 6 will be described. A conventional antenna device is fed from a feed coaxial line. The signal input to the feed coaxial line excites a cavity formed between the outer coaxial conductor 1 and the radiation conductor 4 via the feed slit 3. If the cavity is made to have an electrical length of about half the wavelength of the electrical length of the frequency used in the conventional antenna device, cavity resonance occurs in this cavity, and a dipole current occurs on the radiation conductor 4. Therefore, the radiation conductor 4 operates as an element antenna. The antenna device shown in FIG. 6 includes such element antennas provided in multiple stages in series, and is called a collinear array antenna.

If the direction of the antenna axis parallel to the feed coaxial line of the antenna device shown in FIG. 6 is set to the vertical (vertical) direction, the antenna device has a radiation pattern of a linear array in a plane perpendicular to the antenna axis direction. When the antenna axis direction of the antenna device is set to the vertical direction, the antenna device has an omnidirectional radiation pattern in a plane (horizontal plane) orthogonal to the antenna axis direction.

[0005]

As described above, the conventional antenna device cannot realize a high antenna gain because it has an omnidirectional radiation pattern in a horizontal plane direction orthogonal to the antenna axis direction. Was.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an antenna device which realizes high gain by using an electromagnetically coupled coaxial dipole array antenna.

[0007]

An antenna device according to the present invention comprises: a coaxial line; an outer conductor surrounding the coaxial line;
The feed slit, which is provided almost perpendicular to the direction of extension of the coaxial line and separates the outer conductor,
The coaxial line and the outer conductor penetrate the pipe-shaped hollow interior,
A plurality of element antennas are formed in series in the direction in which the coaxial line extends in a direction in which the coaxial line extends, the radiation antenna having an electrical length of about の wavelength of the used frequency band surrounding the feed slit and having a central axis coinciding with the central axis of the coaxial line. A plurality of electromagnetically coupled coaxial dipole array antennas obtained by arranging a phase shifter and a transmission / reception module at one end are arranged in parallel.

Further, the antenna device according to the present invention comprises:
The coaxial line, the outer conductor, and the radiation conductor have a circular shape.

Further, the antenna device according to the present invention is provided with a conductor reflector in parallel with a plane including a plurality of electromagnetically coupled coaxial dipole array antennas.

[0010] The antenna device according to the present invention includes:
A first array in which a phase shifter and a transmission / reception module are connected to one end of an electromagnetically coupled coaxial dipole array antenna are arranged in parallel so as to have the same polarization. A second array configured by connecting a plurality of phase shifters and a transmission / reception module at one end and arranging a plurality of parallel arrays so as to have the same polarization, and a polarization output from the first array; The first array and the second array are installed such that the polarizations output from the second array and the second array are orthogonal to each other.

Further, in the antenna device according to the present invention, a conductor reflecting plate is provided in parallel with a plane formed by the first array or the second array.

Further, an antenna device according to the present invention comprises:
In the antenna device, a conductor shielding plate is provided in a wide angle direction with respect to an antenna boresight direction.

Further, an antenna device according to the present invention includes an electromagnetically coupled coaxial dipole array antenna, a phase shifter and a transmission / reception module provided at one end of the electromagnetically coupled coaxial dipole array antenna, an electromagnetically coupled coaxial dipole array antenna, And a conductor reflector provided in parallel with a plane comprising a first array obtained by arranging a plurality of sub-arrays comprising transmitter and receiver modules in parallel, and an antenna device having a sub-array so as to surround the sub-array and the conductor reflector. And a conductor shielding plate provided in a wide-angle direction with respect to the antenna boresight direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the Invention One embodiment of the antenna device of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram illustrating a configuration of the antenna device according to the first embodiment of the present invention. In FIG. 1, reference numeral 5 denotes an electromagnetically coupled coaxial dipole array antenna. Reference numeral 6 denotes a phase shifter, which is an electromagnetically coupled coaxial dipole array antenna 5
Connected to. Reference numeral 7 denotes a transmission / reception module, and a phase shifter 6
Connected to. The antenna device shown in FIG. 1 has an electromagnetically coupled coaxial dipole array antenna 5 to which a phase shifter 6 and a transmitting / receiving module 7 are connected as a sub-array, and a plurality of such sub-arrays are arranged in parallel in the antenna axis direction. In FIG. 1, the same or corresponding parts as those in the conventional example shown in FIG. 6 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG.

Next, the operation of the antenna device of this embodiment shown in FIG. 1 will be described. The antenna device according to the present embodiment is a linear array using a sub-array as an element antenna, and uses the phase shifter 6 of each sub-array to adjust the array excitation phase of each sub-array so as to be in phase in a desired observation direction. Then, the antenna device forms a main beam in the observation direction. Further, the phase shifter 6 of each sub-array is electrically controlled, and the direction of the antenna beam of the antenna device is one-dimensionally scanned. Further, the transmitting and receiving module 7 connected to each sub-array operates the antenna device as an active phased array antenna.

As described above, in the conventional antenna device having only a single sub-array, the main beam direction is fixed, but in the antenna device of the present embodiment, beam scanning becomes possible, and the antenna gain is increased. Becomes larger than when the subarray is used alone.

Further, in the antenna device of the present embodiment, the antenna gain can be improved without increasing the length of each sub-array. That is, the antenna gain can be improved without increasing the number of stages of the element antenna included in the sub-array. Therefore, the antenna device of the present embodiment enables antenna matching over a wide band. As one method of increasing the gain of the collinear array antenna, it is conceivable to increase the number of element antennas of the collinear array antenna. Since the power is fed, increasing the number of stages of the element antenna causes a long-line effect, and when this long-line effect occurs, there arises a problem that the matching band of the antenna device decreases.

Further, the antenna device of the present embodiment can obtain a small-sized antenna device excellent in feasibility even when the antenna device is operated with a large power. This is because the capacity of the power amplifier provided in the antenna device can be divided for each of the plurality of sub-arrays, and the output of each power amplifier provided in each sub-array can be kept low. In general, there is a demand that the antenna device be excited with high power. Therefore, when a high-power power amplifier is used for an antenna device having only one sub-array, the size and cost of the power amplifier are larger than those of a low-power power amplifier, and the size and cost of the entire antenna device are also reduced It is common for it to be large. Injecting large power into the sub-array alone
Problems also arise in the withstand voltage of the sub-array itself.

Embodiment 2 of the Invention Another embodiment of the antenna device of the present invention will be described with reference to FIG. FIG. 2 is a configuration diagram illustrating a configuration of the antenna device according to the second embodiment of the present invention. In FIG. 2, reference numeral 8 denotes a first array, which is formed by arranging a plurality of sub-arrays in parallel with the antenna axis direction, using an electromagnetically coupled coaxial dipole array antenna 5 to which a phase shifter 6 and a transmission / reception module 7 are connected. Have been. Reference numeral 9 denotes a second array. The second array 9 is also configured such that a plurality of sub-arrays are arranged in parallel with the antenna axis direction, using the electromagnetically coupled coaxial dipole array antenna 5 to which the phase shifter 6 and the transmission / reception module 7 are connected as a sub-array. The first array 8 and the second array 9 are arranged so that the polarizations output from the respective arrays are orthogonal to each other, and are provided above the same opening. Further, in FIG. 2, the same or corresponding parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted, and the parts different from FIG.

Next, the operation of the antenna device of the present embodiment shown in FIG. 2 will be described. The antenna device of the present embodiment is a phased array, and performs two-dimensional beam scanning on two orthogonal surfaces by electrical control. That is, the antenna device of the present embodiment uses the first array 8 as shown in FIG.
The beam is scanned in the horizontal direction toward the plane of the drawing, and in a plane parallel to the antenna axis direction of each sub-array of the first array 8 and perpendicular to the plane of the drawing. In addition, the antenna device of the present embodiment uses the second array 9 to adjust the plane parallel to the antenna axis direction of each sub-array of the second array 9 and perpendicular to the plane of the drawing of FIG. Within, scan the beam.

Next, for example, a case where the antenna device of the present embodiment is used for an atmospheric observation radar will be described below. One of the purposes of the atmospheric observation radar is to measure the velocity distribution of the atmosphere using the pulse Doppler radar method.
As a method for measuring the velocity distribution of the atmosphere, component data of an atmospheric velocity vector in a linear direction connecting an observation point and an antenna device serving as a radar, and an atmosphere corresponding to two directions orthogonal to the linear direction near the observation point. It is conceivable to obtain a velocity vector in the observation direction using the component data of the velocity vector. Then, in this case, it is necessary to form the beam of the antenna device in two directions orthogonal to the linear direction from the antenna device to the observation point and the linear direction near the observation point, that is, three directions. Therefore, to use the antenna device of the present embodiment in such a case, first,
Using the first array 8 or the second array 9, a beam is formed in a direction toward a target observation point. Next, the first
A beam is formed in a plane near the target direction using the array 8 of FIG. Further, a beam is formed in a direction orthogonal to the plane using the second array 9. By performing the above operation, the antenna device of the present embodiment can measure the velocity distribution of the atmosphere performed by the atmosphere observation radar. In the case of atmospheric observation, the polarization dependence of the atmospheric reflection coefficient is generally not a problem.
The beam emitted by this antenna device is orthogonally polarized,
It can be used for any desired application. If an accurate measurement is required, a beam is formed in a target direction using the first array 8 and the second array 9, data of orthogonally polarized waves is obtained in the target direction, and averaging processing and the like are performed. It can be used to improve the data signal processing accuracy.

Further, in the antenna device of the present embodiment, since the orthogonally polarized two-polarized array antenna is provided in the upper portion of the same opening,
The beam can be scanned in two orthogonal planes. Furthermore, the antenna device of the present embodiment has two orthogonal
Since two array antennas for forming beams in the directions are provided in the upper portion of the same opening, the array antennas are installed as compared with the case where beam scanning is performed by two independent array antennas for scanning a predetermined surface. Required installation area can be halved.

Further, the antenna device of the present embodiment can reduce the number of phase shifters to be installed as a phased array for scanning beams on two orthogonal planes, thereby realizing a low-cost antenna device. . In general, the phase shifter in the phased array is loaded for each element antenna, whereas the phase shifter 6 of the antenna device as in the present embodiment requires only beam scanning on two orthogonal planes. Therefore, it is only necessary to load not each element antenna but each sub-array corresponding to two orthogonal directions forming the opening of the antenna device.

Embodiment 3 of the Invention Another embodiment of the antenna device of the present invention will be described with reference to FIG. FIG. 3 is a configuration diagram illustrating a configuration of the antenna device according to the third embodiment of the present invention. In FIG. 3, reference numeral 10 denotes a conductive reflector, and 11 denotes a module box. The module box 11 stores the phase shifter 6 and the transmission / reception module 7. In FIG. 3, FIG.
The same or corresponding parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The different parts from FIG. 1 have been described.

Next, a method of using and assembling the antenna device of the present embodiment shown in FIG. 3 will be described below.
The antenna device according to the present embodiment is used, for example, when the antenna device according to the first embodiment is arranged on the ground surface to form a beam in a direction other than underground. For example, when the antenna device according to the first embodiment is arranged on the ground surface, a signal output in the underground direction becomes an unnecessary wave. Therefore, in the antenna device according to the present embodiment, the antenna device according to the first embodiment is provided after the conductor reflection plate 10 is disposed on the ground surface. That is,
The conductor reflector 10 is provided below the antenna opening. As a result, the signal output from the sub-array included in the antenna device in the underground direction is reflected in a direction other than the underground, and the gain of the sub-array in the space direction other than the underground is increased. Also, unnecessary waves from underground are blocked by the conductive reflector 10, so that the gain of the sub-array in the space direction other than underground increases.

Further, in the antenna device of the present embodiment, the conductor reflection plate 10 is always provided near the sub-array irrespective of the installation location, so that the antenna characteristics can be kept constant. This is generally effective in that the electric constant such as the relative dielectric constant of the ground changes depending on the antenna installation location, and when the antenna device is installed at an arbitrary location, the radiation pattern of the antenna device changes. Not only does it change, but also the input impedance to the subarray changes.

The antenna device according to the present embodiment not only improves the electrical characteristics of the antenna device by using the conductor reflector 10 but also fixes the sub-array and the module box 11 to the conductor reflector 10 so that It functions as a support mechanism and can improve the strength of the entire antenna device.

Embodiment 4 of the Invention Another embodiment of the antenna device of the present invention will be described with reference to FIG. FIG. 4 is a configuration diagram illustrating a configuration of the antenna device according to the fourth embodiment of the present invention. In FIG. 4, reference numeral 12 denotes a conductor shielding plate. This conductor shielding plate 12 is used in the first to third embodiments.
Are provided in a wide angle direction with respect to the antenna boresight direction of the antenna device shown in FIG. When the antenna device is installed on the ground surface as shown in FIG. 4, the antenna boresight direction indicates the zenith direction, the antenna wide angle direction is a direction perpendicular to the antenna boresight direction, and Or, it is the direction in which the conductor shielding plate 12 is formed when viewed from the sub-array, and indicates the horizontal plane direction. That is,
The conductor shield plate 12 is provided upright with respect to the installation surface of the antenna device or the sub-array, and the sub-array and the module box 11 are surrounded and installed by the conductor shield plate 12. In FIG. 4, the same or corresponding parts as those in the third embodiment shown in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.

As described above, by providing the conductor shielding plate 12 in the wide-angle direction with respect to the antenna boresight direction of the antenna device, electromagnetic waves in the wide-angle direction can be cut off, and the wide-angle radiation level can be reduced. This is because, if an antenna device in which the conductor shielding plate 12 is not provided in a wide angle direction with respect to the antenna boresight direction is used, a problem may occur with respect to the radiation level in the wide angle direction. If an antenna device having no conductor shielding plate 12 is used at a high power, the measuring device, the measurer, and nearby towns and villages are present in the wide-angle direction, so that the measuring device operates stably and may cause danger to the human body. This may hinder the reduction of the performance and the reduction of interference with other communication lines.

Further, in the antenna device of the present embodiment, since the wide-angle radiation level can be reduced by the conductor shielding plate 12 having a relatively simple structure, a relatively high-performance antenna device can be realized at low cost. As another method for reducing the wide-angle radiation level of the antenna device, a method using a radio wave absorber can be considered. However, the use of a radio wave absorber generally causes an increase in size and cost. In addition, when the antenna device is used in a severe environment such as wind and rain, it may be difficult to obtain a radio wave absorbing material having excellent durability characteristics.

Further, in the antenna device of the present embodiment, the height of the conductor shielding plate 12 can be adjusted according to the use environment, and a desired wide-angle radiation level can be realized under various environments. .

Further, when the aperture diameter of the antenna device of the present embodiment is substantially the same as the scale of a human body and the antenna device is used with high power, it is dangerous that a third party approaches the antenna device. The conductor shielding plate 12 of the antenna device also functions as a fence surrounding the dangerous substance.

Embodiment 5 of the Invention Another embodiment of the antenna device of the present invention will be described with reference to FIG. FIG. 5 is a configuration diagram illustrating a configuration of the antenna device according to the fifth embodiment of the present invention. In FIG. 5, reference numeral 13 denotes a conductor flexible sheet, which plays a role of the conductor reflection plate 10. Reference numeral 14 denotes a conductor shielding plate component, and the conductor shielding plate 12 is obtained by assembling the conductor shielding plate component 14. Note that the sub-array and the module box 11 are removable. In FIG. 5, the same or corresponding parts as those of the third embodiment shown in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted. The parts different from FIG. The upper diagram in FIG. 5 shows a mode in which the antenna device of the present embodiment is operated, and the lower diagram in FIG.
This indicates that when the antenna device is transported, the antenna device is disassembled into components and transported. Each component obtained by disassembling the antenna device when carrying the antenna device is, for example, a sub-array, an electromagnetically coupled coaxial dipole array antenna 5, a phase shifter 6, and a module box 11 having a transmission / reception module. A flexible sheet 13 and a conductor shielding plate part 14 which becomes the conductor shielding plate 12 when assembled.

As described above, in the antenna device of the present embodiment, since the components of the antenna device are detachable, the space for storing the components required for transporting the antenna device can be reduced. Portability is improved.

Further, it is general that each component of the antenna device has a different vibration-proof strength and the like. In the antenna device of the present embodiment, for example, only the module box 12 which needs to be carefully transported is separated from the sub-array. As a result, only the module box 12 can be transported after being packaged with excellent vibration resistance and shielding properties.

Further, by using the conductor flexible sheet 13 as the conductor reflection plate 10 of the antenna device of the present embodiment, the conductor flexible sheet 13 is rolled as shown in FIG. It can be stored in a space. In addition, this conductor flexible sheet 13 is extended and used at the time of operation of an antenna.

Further, by using the conductor shielding plate component 14 as the conductor shielding plate 12 of the antenna device of the present embodiment, the conductor shielding plate 12 can be transported as shown in FIG. It can be disassembled into parts 14 and stored in a small space.

In order to reduce the weight of the conductor flexible sheet 13 or the conductor shielding plate part 14, a metal wire mesh, a perforated conductor plate, or the like may be used. In this case, if the size of the mesh of the wire mesh or the size of the hole is made sufficiently smaller than the used wavelength, the same electrical characteristics as in the case where the conductor plate is used can be realized.

[0039]

As described above, the antenna device according to the present invention comprises: a coaxial line; an outer conductor surrounding the coaxial line;
The feed slit, which is provided almost perpendicular to the direction of extension of the coaxial line and separates the outer conductor,
The coaxial line and the outer conductor penetrate the pipe-shaped hollow interior,
A plurality of element antennas are formed in series in the direction in which the coaxial line extends in a direction in which the coaxial line extends, the radiation antenna having an electrical length of about の wavelength of the used frequency band surrounding the feed slit and having a central axis coinciding with the central axis of the coaxial line. A phase shifter and a transmitter / receiver module are connected to one end of an electromagnetically coupled coaxial dipole array antenna obtained by arranging a plurality of antennas. An antenna device including an electromagnetically coupled coaxial dipole array antenna that can be operated as an array can be obtained.

Further, the antenna device according to the present invention comprises:
Since a conductor reflector is provided parallel to the plane consisting of multiple electromagnetically coupled coaxial dipole array antennas, the radiation pattern level on the back surface in the antenna boresight direction can be reduced, the sub-array gain can be improved, and unwanted wave levels can be improved. Is obtained.

Further, an antenna device according to the present invention comprises an electromagnetically coupled coaxial dipole array antenna having one end connected to a phase shifter and a transmission / reception module.
A first array configured by arranging a plurality of parallel so as to have the same polarization, and a configuration in which a phase shifter and a transmission / reception module are connected to one end of an electromagnetically coupled coaxial dipole array antenna are configured to have the same polarization. A plurality of second arrays arranged in parallel with each other, wherein the first array and the second array are arranged such that the polarization output from the first array and the polarization output from the second array are orthogonal to each other. Since two arrays are provided, it is possible to realize an antenna device that can scan a beam in two orthogonal planes with the same aperture.

Further, the antenna device according to the present invention comprises:
Since the conductor reflector is provided in parallel with the plane formed by the first array or the second array, the radiation pattern level on the back surface in the antenna boresight direction can be reduced, the sub-array gain can be improved, and unnecessary wave can be improved. An antenna device with a reduced level can be obtained.

Further, since the antenna device according to the present invention has the conductor shielding plate provided in the wide angle direction with respect to the antenna boresight direction of the antenna device, the antenna pattern in the direction of the conductor shielding plate can be attenuated, and the antenna device can be widened in the wide angle direction. Antenna unnecessary radiation can be suppressed.

Also, the antenna device according to the present invention
An electromagnetic coupling coaxial dipole array antenna, a phase shifter and a transmission / reception module provided at one end of the electromagnetic coupling coaxial dipole array antenna, and a plurality of sub-arrays each including an electromagnetic coupling coaxial dipole array antenna, a phase shifter, and a transmission / reception module are arranged in parallel. A conductor reflector provided parallel to a plane formed by the obtained first array, and a conductor shield provided in a wide-angle direction with respect to the antenna boresight direction of the antenna device having the sub-array so as to surround the sub-array and the conductor reflector. Since the plate and the plate are detachable, the space for storing the components when the antenna is carried can be reduced, and an antenna device excellent in portability can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a configuration of an antenna device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a configuration of an antenna device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram illustrating a configuration of an antenna device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram illustrating a configuration of an antenna device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram illustrating a configuration of an antenna device according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram showing a configuration of a conventional antenna device.

[Explanation of symbols]

1 outer coaxial conductor, 2 inner coaxial conductor, 3 feeding slit,
Reference Signs List 4 radiation conductor, 5 electromagnetic coupling coaxial dipole array antenna, 6 phase shifter, 7 transmission / reception module, 8 first array, 9 second array, 10 conductor reflector, 11 module box, 12 conductor shield, 13 conductor flexible Sheet, 14 Conductor shielding plate parts.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Isamu Chiba 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Co., Ltd. 5J021 AA05 AA07 AA09 AA11 AB03 BA01 CA01 CA06 DB03 FA05 FA26 GA01 GA02 GA08 HA05 HA10 JA07

Claims (7)

[Claims] A coaxial line, an outer conductor surrounding the coaxial line, a feed slit provided substantially perpendicular to a direction in which the coaxial line extends and dividing the outer conductor, and a pipe formed by the conductor. The coaxial line and the outer conductor penetrate through the hollow inside of the pipe, and surround the feeding slit;
A radiating conductor having an electrical length of about one-half wavelength of the used frequency band and having a central axis coinciding with the central axis of the coaxial line is obtained by arranging a plurality of element antennas in series in the extending direction of the coaxial line. An antenna device comprising a plurality of electromagnetically coupled coaxial dipole array antennas each having a phase shifter and a transmission / reception module connected to one end thereof, arranged in parallel. 2. The antenna device according to claim 1, wherein the coaxial line, the outer conductor, and the radiation conductor have a circular shape. 3. The antenna device according to claim 1, wherein a conductor reflector is provided in parallel with a plane formed by a plurality of electromagnetically coupled coaxial dipole array antennas. 4. A first array comprising a plurality of electromagnetically coupled coaxial dipole array antennas each having a phase shifter and a transmission / reception module connected to one end thereof and arranged in parallel so as to have the same polarization. A second array configured by connecting a phase shifter and a transmitting / receiving module to one end of a coaxial dipole array antenna and arranging a plurality of parallel arrays so as to have the same polarization. The polarized light output from the second array is orthogonal to the polarized light output from the second array.
The antenna device according to claim 1, wherein one array and the second array are provided. 5. The antenna device according to claim 4, wherein a conductor reflector is provided in parallel with a plane formed by the first array or the second array. 6. The antenna device according to claim 1, wherein a conductor shielding plate is provided in a wide angle direction with respect to a direction of an antenna boresight of the antenna device. 7. An electromagnetically coupled coaxial dipole array antenna, a phase shifter and a transmission / reception module provided at one end of the electromagnetically coupled coaxial dipole array antenna, the electromagnetically coupled coaxial dipole array antenna, a phase shifter,
And a conductor reflector provided in parallel with a plane of a first array obtained by arranging a plurality of sub-arrays of transmission / reception modules in parallel, and an antenna device having the sub-array so as to surround the sub-array and the conductor reflector. An antenna device, wherein a conductor shielding plate provided in a wide angle direction with respect to an antenna boresight direction is detachable.