JP2001116818A - Radio direction finding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio direction finding device which does no harm to man or beast when an antenna element is damaged by minute vibration due to wind pressure and weather pressure. SOLUTION: This radio direction finding device 500 detects an incoming direction D1 of a radio wave by a reception signal 100a having received a predetermined radio wave by antenna elements 101A to 101E vertically protruding up and down from a tip portion of a plurality of support arms 102A to 102E radially protruding from a center position 110. Antenna bodies 101A to 101E and the support arms 102A to 102E are connected by a connecting member 310 mainly comprising a bent body (string-like body) 301 of a material not affecting the radio wave in addition to connecting portions 101A1 to 101E1 connectively fixing antenna conductors 101A to 101E and the support arms 102A to 102E. If the antenna elements 101A to 101E are formed in a basket-like body, a midway part of the bent body (string-like body) 301 is passed through a basket portion or wound around a basket frame for connecting it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is obtained by receiving a predetermined radio wave from an end of a plurality of support arms radially projecting in a horizontal plane from a center position by an antenna element vertically projecting vertically. The present invention relates to a wireless direction finding apparatus having a configuration for detecting the direction of arrival of the above-mentioned radio wave based on a received signal.

[0002]

2. Description of the Related Art An antenna device of this type of radio direction detecting device is a [straight rod antenna type] antenna device as shown in FIGS. 9 to 11 which is used for detecting radio waves in a relatively low frequency band. 100 (hereinafter referred to as a first prior art), and a configuration of a [large basket antenna type] antenna device 100 as shown in FIGS. 12 to 14 similarly used for detecting radio waves in a relatively low frequency band. (Hereafter, the second
The configuration of an antenna device 100 of a [small basket antenna type] as shown in FIGS. 15 to 17 used for detecting radio waves in a relatively high frequency band (hereinafter, referred to as a third conventional technology). It is well known. In the following FIGS. 9 to 19, portions denoted by the same reference numerals have the same functions. Further, in the present invention, a member refers to a constituent material constituting a predetermined portion.

[0003] Here, the reason why the antenna elements 101A to 101E are formed in a cage-like body, such as [large basket antenna type] and [small basket antenna type], is to improve the effective height and the wide band of the antenna. Also, even in the case of a frequency band using [straight rod antenna type], it is better to make a cage,
When the cage is formed, the supporting arms 102A-1 supporting the cage are formed.
This is because it becomes difficult to maintain the mechanical strength of the 02E portion.

[0004] In these antenna devices 100, a plurality of antenna elements 101A to 101E are arranged at a center position 11A.
A plurality of support arms 1 projecting radially from 0 to a horizontal plane
02A-102E each tip part 102A1-102E1
The antenna elements 101A to 101E detect the arrival direction D1 of the radio wave based on a reception signal obtained by receiving a predetermined radio wave (not shown) by each of the antenna elements 101A to 101E. are doing. This detection is performed, for example, using an angle value θ with respect to a reference direction D0, for example, a true north direction.
Is performed by measuring.

The center position 11 of the antenna device 100
0, that is, the upper surface side X1 of the center base support 120 is drawn open in each figure, but when the antenna device 100 is used alone, an appropriate waterproof cover (not shown) is used. ), And the columnar body 1 provided below the center base support 120 as necessary.
An appropriate columnar body (not shown) is further added below 30.

Further, a plurality of different antenna devices 100 for receiving radio waves of a plurality of different frequency bands are arranged in a vertical direction, for example, a [multistage antenna type] antenna device 100X as shown in FIGS. When the antenna device 10 is configured as
The columnar body 130 of zero is formed by adding the bottom side X2.
If necessary, as shown in FIG.
Auxiliary column 1 to make 00 the required height
In some cases, 30X is added.

[0007] Each of the antenna elements 101A to 101E
The number of arrangements of the support arms 102A to 102E may be an odd number, for example, five, as shown in each drawing, or an even number, for example, six.

The configuration of the radio direction finding apparatus 500 is based on a received signal 100a obtained by receiving radio waves of the frequency selected and designated by the receiving section 210 by each of the antenna elements 101A to 101E of the antenna apparatus 100. It detects the arrival direction D1 of the radio wave, and for example,
The direction signal 220 representing the arrival direction D1 of the radio wave is obtained by subjecting the amplified signal 210a obtained by amplifying the received signal 100a by the receiving section 210 to required detection processing by the direction detecting section 220.
a, and the direction signal 220a is given to the direction display portion 230, and the direction display screen based on the analog value is
Alternatively, the arrival direction D1 of the radio wave is displayed on a display screen using digital values.

As a direction detecting method of the wireless direction detecting apparatus 500, a configuration using a so-called Bellini-Toshi type direction detecting method (hereinafter, referred to as a fourth conventional technique) and a configuration using a Doppler type direction detecting method (hereinafter, referred to as a fifth type). A conventional technology), a configuration of an interferometer type direction detection system (hereinafter, referred to as a sixth conventional technology), and a MUSIC type direction detection system (hereinafter, referred to as an improved interferometer type).
7th prior art).

In the direction detection system of the Bellini-Toshi type, each of the antenna elements 101A to 101E is formed as an Adcock type antenna, and each of the antenna elements 101A to 101E is formed.
1E is directed to a goniometer (not shown) provided in a hollow portion of the center base support 120, and the goniometer receives a received signal 1 obtained by mechanical or electronic rotation.
00a is given to the receiving part, and the minimum sensitivity direction caused by the rotation is detected as the direction of arrival of the radio wave.
The number of arrangements of 1A to 101E is an even number.

In the direction detection system of the Doppler system, each of the antenna elements 101A to 101E is formed as a dipole antenna, and each of the antenna elements 101A to 101E is formed.
Are output to an electronic switching scanning portion (not shown) provided in the hollow portion of the center base support 120, and the switching scanning is sequentially switched in a predetermined circulation direction, for example, clockwise. The maximum direction of the phase change at the time of switching of the received signal 100a obtained while receiving is detected as the direction of arrival of the radio wave, and the number of antenna elements 101A to 101E arranged is an even plural number. There are cases and odd pluralities.

In an interferometer type direction detecting method, each antenna element 101A to 101E is connected to a dipole antenna.
Each antenna element 101A is formed as an antenna.
Each receiving part 210 is provided so as to correspond to each of the antenna elements 101A to 101E, and the phase difference of each amplified signal 210a that accurately maintains the phase corresponding to the frequency phase of the radio wave when the radio wave arrives at each of the antenna elements 101A to 101E. It is configured to detect the direction of arrival of the radio wave based on the
The direction finding system of the MUSIC system is similar to the direction finding system of the interferometer system. The direction finding system detects the direction of arrival of a radio wave based on the difference in phase and amplitude of each amplified signal 210a. The antennas 101A to 101E in these configurations have an even number of arrangements and an odd number of arrangements of the antenna elements 101A to 101E. .

The antenna device 100 of the [straight rod antenna type] shown in FIGS. 9 to 11, that is, the configuration of the first prior art, specifically, radially projects from the center position 110 into a horizontal plane. The plurality of support arms 102A to 10
2E is, for example, a metal tube, and has a center position 11
The mounting seat portions 102A2 to 102E2, for example, a cast object made of a metal material is screwed and fixed to the 0 side with a packing interposed therebetween, and the mounting seat portions 102A2 to 102E2 are used to fix the center base support body 120, for example, a metal material. Each of the supporting arms 102A to 102A is screwed and fixed to a cast object.
Each of the antenna elements 101A to 101E projecting up and down from the front end portions 102A1 to 102E1 of the 2E is held by insulator holding portions 103A to 103E, for example, a molded body of a synthetic resin material containing reinforcing fibers. The fixing between the supporting arms 102A to 102E and the holding portions 103A to 103E is performed by inserting the supporting arms 102A to 102E into the cylindrical portions 103A1 to 103E1 molded integrally with the holding portions 103A to 103E, and performing packing. The key points are screwed in and fixed.

Each of the antenna elements 101A to 101E
Is a linear rod-shaped body, that is, an antenna element formed of a straight rod-shaped body, for example, a metal pipe with both ends closed and having a smaller outer diameter toward the tip. Connection part 10 provided at the base
1A1 to 101E1, for example, holding parts 103A to 103A-1 by a screw part (not shown) and a nut part of a metal material.
03E. Holding portions 103A to 103A
The inside of E is hollow, and the antenna elements 101A to 101A
A terminal portion (not shown) for taking out the output of the antenna element 101A is provided from the terminal portion.
The output of 101E is guided to the center base support 120 via a cable (not shown) disposed inside the support arms 102A to 102E, and, if necessary, after passing through the goniometer or the switching scanning portion, to a columnar shape. Body 130 or 13
The receiving signal 100a is guided to the receiving cable 211 via an appropriate wiring cable (not shown) disposed inside the first and second X.130X and a wiring box 131 provided near the base of the columnar body 130 or 130X.

Each of the support arms 102A to 102E is provided with a corresponding one of the support arms 102A to 102E in order to suppress the horizontal movement thereof.
In the middle part 102A3 to 102E3 of 102E, that is, at the position of the middle part, the fixing holding bodies 104A to
104E, for example, a bent formed body of a metal plate is fixedly provided, and between the fixing holding members 104A to 104E,
That is, a horizontal first rod-like body 105A to 105E, for example, a band-like body having a rectangular cross section of a metal material, is fixed between the intermediate portions 102A3 to 102E3 as a so-called lateral stay.

Further, in order to suppress the vertical movement of the support arms 102A to 102E, each of the support arms 102A to 102E
102E, for example, each fixing holder 104A
~ 104E and the columnar body 130 arranged at the center position 110,
For example, the second rod-like bodies 106A to 106E which are oblique between the holding members 107A to 107E fixedly provided at predetermined positions of the metal tube, for example, a band shape having a rectangular cross section of the metal material. The body is fixed as a so-called vertical stay. That is, a perspective view of a portion related to the antenna element 101A has a configuration as shown in FIG.

The [large basket antenna type] antenna device 100 shown in FIGS. 12 to 14, that is, the configuration of the above-mentioned second prior art is specifically described in FIG. 9 to FIG. Antenna type], that is, the following points are different from the configuration of the first prior art.

First, the antenna elements 101A to 101A
A basket frame 1 in which a portion E is a large basket-like body, for example, a round bar or a pipe made of a metal material formed in a vertical shape in a “U” shape.
01a are radially arranged on a horizontal plane, the leading end of the "U" is connected to the annular metal body 101c, and the base of the "U" is formed. By providing a cage portion 101x formed by connecting the sides to a short cylindrical body 101d made of a metal material and providing all of the "U-shaped" bent corner portions 101b with a similar round bar or pipe, a large basket-like shape is obtained. This is a portion formed as a body antenna element.

Second, the connection portions 101A1 to 101E
1 is formed by a base-side cylindrical body 101d and a set screw 101e, and the set screw 101e is
01d through the center hole (not shown) of set screw 101e
Are fixed to the holding portions 103A to 103E by screw portions provided on the holding portions 103A to 103E side. FIG. 14 shows a perspective view of a portion related to the antenna element 101A.

Further, the [small basket antenna type] antenna device 100 shown in FIGS. 15 to 17, that is, the configuration of the third prior art is specifically described in the [large basket antenna] shown in FIGS. Type] antenna device 100, that is,
The following points are different from the configuration of the second related art.

First, the antenna elements 101A to 101A
A basket frame 1 in which a portion E is a small basket-like body, for example, a round bar or a pipe made of a metal material formed in a "U" shape in a vertical plane.
A plurality of 01a, for example, six, are radially arranged on a horizontal plane, and the leading end side of the "U" is connected to the boss portion 101g provided on the leading end side of the long cylindrical body 101f made of a metal material. In addition, the base side of the "U-shape" is cylindrical body 1
This is a portion formed as a small cage-shaped antenna element by providing a cage portion 101y formed continuously with a boss portion 101h provided on the base side of 01f.

Second, the connection portions 101A1 to 101E
1 is formed by a long cylindrical body 101f and a set screw 101j, and a set screw 101lj is passed through a center hole (not shown) of the long cylindrical body 101f to set the set screw 10l.
This is a portion configured to be fixed to the holding portions 103A to 103E by screw portions provided on the holding portions 103A to 103E side of 1j. Then, the antenna element 101A
FIG. 17 is a perspective view of a portion related to.

When the radio direction detecting apparatus 500 is configured to have a very wide frequency band of radio waves to be detected, for example,
Like the plurality of antenna devices 100 in FIGS. 18 and 19, a plurality of arbitrary ones of the antenna devices 100 according to the above-described first prior art, second prior art, and third prior art are selected and vertically selected. The antenna device 100U for a higher frequency band and the lightning arrester 180 are arranged vertically in the upper part, if necessary, and are appropriately fixed, such as bolts and nuts. (Hereinafter referred to as the eighth conventional technology)
Knitted and used.

In the case of the configuration according to the eighth prior art as shown in FIGS. 18 and 19, each of the antenna devices 100 and 10
Each received signal 100a obtained from 0U is switched and selected by the antenna switching unit 240, and the received signal 100a obtained from any one of the antenna devices is supplied to the receiving unit 210. In addition, each antenna device 100 group is arranged in the same manner as in the above-described seventh conventional technique, and each antenna device 1 is provided without providing the antenna switching portion 240 described above.
The received signals from the U.S. 00 and U 100 U are respectively separated into separate receiving portions 210, direction detecting portions 220, and direction displaying portions 2.
A configuration in which the direction of arrival of radio waves in each frequency band is simultaneously detected by applying the control signal to the frequency band 40 (hereinafter referred to as a ninth conventional technique) is also known.

[0025]

The fourth prior art described above
In the configuration of the radio direction finding apparatus 500 according to the eighth prior art, the antenna apparatus 100 according to the first to third prior arts used in the configuration is placed outdoors in a relatively high place with little radio interference, for example, on a hill. Or each antenna element 101 for use by installing it on the rooftop of a building.
A to 101E are subjected to wind pressure, wind and rain pressure, etc., and continue to generate minute vibrations that are invisible to the eye.

For this reason, when the antenna device 100 is used for a long period of time, the fatigue caused by the micro-vibration causes the vicinity of the base of the antenna elements 101A to 101E, for example, in the case of a straight rod-shaped antenna element. Connection part 101A
1 are cracked in the vicinity of the tube portion of the antenna element or in the vicinity of the fixing portion between the holding portions 103A to 103E and the supporting arms 102A to 102E, and a large external force due to wind pressure or the like is applied in such a state. Of the antenna element 102 by the damaged straight rod-shaped body.
A to 102E or antenna elements 102A to 102
There is a disadvantage that the united E-holding parts 103A to 103E fall to the ground or are blown off by the wind, causing harm to buildings and pedestrians on the ground. Note that the same minute vibration is generated by the holding portions 103A to 103E.
In some cases, the screwing portion for fixing between the support arm 102A and the support arm 102A to 102E may be loosened to cause a similar trouble.

As a countermeasure in such a case, in the case of a long vertical antenna used for an automobile, a ship, or the like, a helical spring body is provided at a base portion of the vertical antenna or the like to take measures to absorb vibration. However, if such measures are taken, the antenna element will sway laterally due to large wind pressure, wind and rain pressure, etc. Therefore, in the case of the radio direction finding apparatus 500, the phase of the radio wave received by the antenna element is reduced. Since it itself fluctuates, the apparent arrival direction D1
Fluctuates, and it is not practical. Therefore, it is conceivable to increase the mechanical strength to such an extent that the microvibration does not cause breakage. However, if such reinforcement is performed, the size itself becomes large in addition to the increase in the weight of the portion. Since the piezoresistance increases, the support arms 102A to 102E, the center base support 120, and the columnar body 130 need to be reinforced, and the entire antenna device 100 becomes larger and heavier. In addition, the apparatus cannot be provided at low cost, and the installation cost of the antenna apparatus 100 is increased. For this reason, there is a problem that it is desired to provide a wireless direction finding apparatus using such an inconvenient antenna apparatus.

[0028]

SUMMARY OF THE INVENTION According to the present invention, a predetermined radio wave is transmitted from an end of a plurality of support arms extending vertically in a horizontal plane from the center position as described above by vertically extending antenna elements. In a wireless direction finding apparatus for detecting the direction of arrival of the radio wave based on a received signal obtained by receiving a signal, a connecting portion for connecting and fixing between the antenna element and the supporting arm is separate from the connecting part. A first configuration in which connecting means for connecting between the antenna body and the supporting arm body by a connecting member mainly composed of a bent body made of a material that does not affect the radio wave;

In the first configuration, the antenna element is formed of a straight rod-shaped body, and the connecting member is fixed between the bent body formed of a string-shaped member and a predetermined portion of the string-shaped member. And a supporting member having a smaller outer shape than a holding portion for holding the antenna element, wherein the first portion of the string-shaped member is provided at the distal end portion. The above-mentioned fixing member is fixed to a body part, and the second part of the above-mentioned cord-like member is fixed to the above-mentioned connecting part of the above-mentioned straight rod-like body by the above-mentioned fixing member. A second configuration,

In the first configuration, the antenna element is formed of a cage, and the connecting member is fixed between the bent body formed of a string member and a predetermined portion of the string member. And a supporting member having a smaller outer shape than a holding portion for holding the antenna element, wherein the first portion of the string-shaped member is provided at the distal end portion. A part of the body, that is, fixed to the small external supporting arm part by the fixing member, and the second part of the cord-like member is passed through the cage part of the basket-like body, or A third configuration in which the third portion of the cord-shaped member is wound around the basket frame of the basket portion and is fixed to the small outer shape supporting arm portion by the fixing member;

A plurality of antenna elements projecting vertically from a tip end of a plurality of support arms radially projecting in a horizontal plane from a center position are provided. Each of the antenna elements is provided to suppress the horizontal movement of the support arm. The middle part of each of the support arms is fixed by a horizontal first rod-like body between the middle parts of the support arms, and the middle part of each of the support arms is used to suppress the vertical movement of the support arms. Is fixed to the columnar body provided at the center position by a second oblique rod-like body, and the arrival of the above-mentioned radio wave based on a reception signal obtained by receiving a predetermined radio wave by the above-mentioned antenna element. In a wireless direction finding device that detects a direction,

In addition to a connecting portion for connecting and fixing between the antenna element and the support arm, the connecting member mainly composed of a bent body made of a material that does not affect the radio wave is provided separately from the connecting portion for connecting and fixing the antenna element. A fourth configuration in which connection means for connecting between the antenna body and a portion closer to the center position than the portion where the first and second rod-shaped members of the support arm are fixed is provided;

In the fourth configuration, the antenna element is formed of a straight rod-like body, and the connecting member is fixed between the bent body made of a string-shaped member and a predetermined portion of the string-shaped member. And a first portion of the string-shaped member is connected to the first portion of the support arm.
The second rod-shaped member is fixed to a part closer to the center position than the part where the second rod-shaped member is fixed by the fixing member, and the second part of the string-shaped member is fixed to the straight rod-shaped member. A fifth configuration configured to be fixed to a portion closer to the distal end than the connection portion by the fixing member,

In the fourth structure, the antenna element is formed of a cage, and the connecting member is fixed between the bent body formed of a string and a predetermined portion of the string. And a first portion of the string-shaped member is connected to the first portion of the support arm.
A portion closer to the center position than the portion to which the second rod-like body is fixed, that is, fixed to the center-side support arm portion by the fixing member, and the second portion of the string-shaped member is Through the basket part of the basket-shaped body, or wound around the basket frame of the basket part, and the third part of the cord-like member is fixed to the center-side support arm part by the fixing member. The above-described problem is solved by the sixth configuration that is fixed.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, the present invention relates to a radio direction according to the fourth to seventh prior arts using the antenna device 100 according to the first to third prior arts. An embodiment applied to the detection device 500 will be described.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 8, portions denoted by the same reference numerals as those in FIGS. 9 to 19 are portions having the same functions as the portions denoted by the same reference numerals described in FIGS. 9 to 19, and FIGS. Are the parts having the same functions as the parts denoted by the same reference numerals described in any of FIGS.

1 to 3 and FIGS. 6 to 8, FIG.
1, only a perspective view of a main part related to a part of the antenna element 101A corresponding to FIG. 14 and FIG. 17 and only a part of a reception part 210, a direction detection part 220, and a direction display part 230 are shown. , Another antenna element 101B
· 101E · connecting parts 101B1 – 101E1 · holding parts 103B-103E · supporting arms 102B-102E ·
Fixing holders 104B to 104E, first rod-like body 105
A to 105E, second rod-like bodies 106A to 106E, and fixing holders 107A to 107E also have the same perspective parts as those in FIGS. 1 to 3 and FIGS. 6 to 8, respectively. And the columnar body 13 on the center position 110 side.
0, center base support body 120, mounting seat part 102A2-1
02E2 and the like are shown in FIGS.
0, the configurations of FIGS. 12 and 13, and the configurations of FIGS. 15 and 16.

Accordingly, in the following description of the configuration with reference to FIGS. 1 to 3 and FIGS. 6 to 8, one of the reference numerals ending with A to E represents one of them. Finally, the explanation is made with reference to the part with the letter A.

[First Embodiment] A first embodiment will be described below with reference to FIGS. 1, 4 and 5. FIG. The first embodiment is an embodiment in which the present invention is applied to the above-mentioned first prior art. The configuration of the first embodiment is the antenna device 1 of the first prior art shown in FIG.
00 differs from the configuration of the wireless direction finding apparatus 500 in the following points.

First, a bent body 301 made of a material that does not affect radio waves, for example, as shown in FIG.
A core material 30 formed by concentrically arranging a plurality of high-tensile glass fibers in a concentric manner with a synthetic resin adhesive.
A string-shaped member 301 in which the periphery of 1a is covered with a soft covering material 301b formed of weather-resistant vinyl chloride, for example, for fixing the string-shaped member 301 at a required position mainly with a trade name "Debegrass rope" Fig. 5 [Worm tightening band type]
Connecting member 31 combining fixing members 302 such as
0, the antenna body 101A and the support arm bodies 102A to 102A
102E.

Second, by the connection by the connecting member 310, the antenna element 101A and the supporting arm are separated from the connecting portion 101A1 for properly connecting and fixing the antenna element 101A and the supporting arm 102A. When the antenna 102A is connected to the body 102A, a crack is generated between the holding portion 103A and the support arm 102A to cause breakage.
When any of A is cracked near its base and breaks, it is a part that is configured to perform a fall prevention connection to prevent the part detached by the damage from falling to the ground. .

Third, the string-like member 301 and the fixing member 3
The fixing of the connecting member 310 made of No. 02 to the supporting arm body 102A is performed so that the holding part 103A is fixed to a portion of the supporting arm body 102A having an outer shape smaller than the outer shape of the cylindrical portion 103A1 to be inserted into and fixed to the supporting arm body 102A. Even if the micro-vibration causes a crack near the fixed portion between the holding portion 103A and the support arm 102A due to the above-described micro-vibration and breaks or the set screw of the fixed portion is loosened and comes off, the support arm The string-shaped member 301 fixed to 102A with the fixing member 302 is a portion configured such that the integrated portion of the antenna element 101A and the holding portion 103A can be prevented from falling off by the string-shaped member 301.

Fourth, the string-like member 301 and the fixing member 3
02 is fixed to a portion of the antenna element 101A formed of a straight rod-like body with respect to the antenna element 101A that is closer to the distal end than the connection portion 101A1 of the antenna element 101A. Even when the portion of the tubular body of the straight rod-like body very close to the connecting portion 101A of the antenna element 101A due to the body is broken and broken, the string-like member 301 is fixed by the fixing member 302 on the tip side from the damaged part. Thereby, the portion of the antenna element on the tip side from the damaged portion is configured to be prevented from falling off by the string-shaped member 301.

Fifth, the string-like member 301 is folded back at both ends 301d as shown in FIG. 4 [both ends annular type], and an end fixing portion 301e is attached to the end of the folded portion.
With a tape, for example, reinforced polyester, ie, F
Wrap a tape of RP material and fix it with adhesive.
By covering with a heat-shrinkable tube of cross-linked porophine resin material, annular portions 301A and 30
1B.

Sixth, the fixing member 302 is fixed to a fastening band used for fastening a water hose such as a [worm fastening type] shown in FIG. It is a configured part. Then, the fixing member 30
For example, a belt-shaped body 302a made of a stainless steel plate is provided with a toothed hole 302b in place of a tooth profile of a worm gear, and one end of the belt-shaped body 302a is provided with a worm 302c.
A worm mechanism part 3 provided with a part for rotating the axis with a driver, for example, a driver groove 302d.
02e is provided, and the other end of the strip 302a is formed at the release end 302f, so that the portion of the strip 302a is wrapped around a position to be fixed.
f is inserted into a guide hole 302g provided on the lower side of the worm 302c, and the worm 302c is rotated.
It is configured so that the part wound by a is tightened and fixed.

Sixth, the fixing of the string-shaped member 301 to the supporting arm 102A is performed first.
At the position where the fixing member 302 is fixed to 2A, as a protective layer 302 for protecting the support arm and the string-shaped member and also preventing slipping, a soft vinyl chloride 32 for outdoor insulation is used.
OA, for example, a product name “vinyl adhesive tape” is wrapped, and a synthetic resin tube (not shown) whose shape is shrunk by heating around the belt-shaped body 302 a of the fixing member 302, for example, a product name “shrink tube” Is fitted and contracted to form a protective cover (not shown) for preventing damage to the string-like member 301, and the string-like member 3
01 in the hole of one annular portion 301A.
After inserting the portion of 2a, the above worm 302c
It is the place where it is fixed by tightening.

Seventh, the antenna element 1 of a straight rod-like body
The fixing of the string-shaped member 301 to the 01A, specifically,
First, as the protective layer 320 for protecting the straight rod-shaped member and the string-shaped member and also preventing slippage, a portion similar to the above-mentioned soft vinyl chloride tape 320A is provided at a position where the fixing member 302 is fixed to the antenna element 101A. Of the fixing member 302 and the tape 330A
A protective cover (not shown) for preventing damage to the string-like member 301 is formed by fitting a synthetic resin tube similar to the above synthetic resin tube into the portion a and shrinking the tube. The other annular portion 301 of the string member 301
This is a place where the portion of the band-shaped body 302a is inserted into the hole B, and is fixed by tightening with the worm 302c.

In other words, the structure of the first embodiment is generally based on the distal end portions of the plurality of support arms 102A to 102E radially projecting from the center position 110 into a horizontal plane, that is, the distal end portion. In the wireless direction detecting device 500 for detecting the arrival direction D1 of the radio wave based on a reception signal 100a obtained by receiving a predetermined radio wave by the antenna elements 101A to 101E vertically extending from the position of

Separately from the connecting portions 101A1 to 101E1 for connecting and fixing the antenna conductors 101A to 101E and the support arms 102A to 102E,
A connecting member 310 mainly composed of a bent body made of a material that does not affect the above-mentioned radio waves, for example, a cord-shaped member 301 mainly made of a material in which a core material 301a of reinforced glass fiber is covered with a coating material 301b of weather resistant vinyl chloride. Connecting member 310
This constitutes the above-described first configuration in which connection means for connecting between the antennas 101A to 101E and the support arms 102A to 102E are provided.

In the first configuration, the antenna elements 101A to 101E are formed as straight rods.
The above-mentioned bent body composed of the above-mentioned connecting member 310 as a string-like member, for example, a string-like member 301 made of a material in which a core material 301a of reinforced glass fiber is covered with a coating material 301b of weather-resistant vinyl chloride, and the above-mentioned string-like member 301 And a fixing member 302 formed of a belt-shaped body 302a which is fastened by a worm 302c, and a first member of the above-mentioned string-shaped member 301.
Is smaller than the holding portions 103A to 103E for holding the antenna element 101A provided at the tip portion, that is, the tip portions of the support arms 102A to 102E. The fixing member 302 is fixed to the supporting arms 102A to 102E having the outer shape by the fixing member 302.
01, for example, the other annular portion 301B is fixed by the fixing portion 302 at a position on the tip side of the straight rod-shaped connecting portions 101A1 to 101E1 of the antenna elements 101A to 101E. This constitutes the second configuration described above.

[Second Embodiment] A second embodiment will be described below with reference to FIGS. Of the configuration of the second embodiment, the configuration of FIG. 2 is an embodiment in which the present invention is applied to the above-mentioned second conventional technology, and the configuration of FIG. 3 is an application of the present invention to the above-mentioned third conventional technology. This is a working example.

The configuration of FIG. 2 is different from the configuration of the first embodiment of FIG.
FIG. 14 [Large antenna type] according to the second prior art.
And a large cage-shaped antenna element 101A in the above-described configuration, and the middle part of the string-shaped member 301 of the connecting member 310 is replaced with the upper and lower antenna elements 101A.
Are wound around each basket frame 101a.

More specifically, the string-like member 301 is
For example, after being wound from one side of the basket frame 101a of the upper antenna element 101A, the annular body 101 at the distal end portion is wound.
After passing through the hole c, it is wound around the basket frame 101a on the other side, and further wound around the lower antenna element 101A in the same manner, and is placed in the annular portions 301A and 301B at both ends of the string-like member 301. Fixing member 302
Of the fixing member 302
After attaching to the supporting arm 102A, the worm 302
It is configured to be fastened and fixed by c.

The configuration of FIG. 3 is different from the configuration of the first embodiment of FIG. 1 in that the antenna element 101A is replaced by a small portion in the configuration of the [small basket antenna type] of FIG. The antenna element 101A has a cage shape, and the cord member 3
01 is a portion formed through the cage portion 101y of the upper and lower antenna elements 101A.

More specifically, the string-like member 301 is
After passing through one basket frame 101a and then passing through another basket frame 101a, the string-shaped member 3
01 is connected to the annular portions 301 and 301B at both ends of FIG.
In the same manner as in the case of the configuration of
a, and similarly fixed to the support arm 102A.

Therefore, in any of the configurations shown in FIGS. 2 and 3, first, the antenna element 10 is connected by the connection member 310 as in the first embodiment.
An antenna element 10 is provided separately from a connecting portion 101A1 for properly connecting and fixing between the support arm 1A and the support arm 102A.
By connecting between 1A and the supporting arm 102A,
Even if a crack is generated near the fixed portion between the holding portion 103A and the supporting arm 102A due to the above-described microvibration and the portion is broken or the set screw for fixing the portion is loosened and comes off, the supporting arm 102A The string-shaped member 301 fixed by the fixing member 302 prevents the integrated portion of the antenna element 101A and the holding portion 103A from falling off by the string-shaped member 301.

Second, the supporting arm 102 of the antenna element 101A is formed by the large cage portion 10x of the string-shaped member 301.
The connection to A is performed by winding the string-shaped member 301 around the basket frame 101x and connecting it. If the micro-vibration causes a crack near the fixed portion between the holding portion 103A and the support arm body 102A and breaks, Even when the set screw at the connection part is loosened and detached, and the upper and lower antenna elements 101A are separated separately, the upper and lower antenna elements 101A and the holding part are fixed by the string-shaped member 301 fixed to the support arm 102A with the fixing member 302. The integrated portion of 103A is configured to be prevented from falling off by the string-shaped member 301.

Third, the supporting arm 10 of the antenna element 101A is formed by the small cage portion 10x of the string-shaped member 301.
For the connection to 2A, the cord-like member 301 is connected to the cage portion 101y.
When the fixing portion between the holding portion 103A and the support arm 102A is cracked and broken due to the above minute vibration, the set screw of the connecting portion is loosened, and the upper and lower Even when the antenna element 101A is detached separately, the upper and lower antenna elements 10 are fixed by the string-shaped member 301 fixed to the support arm 102A by the fixing member 302.
The integrated portion of 1A and the holding portion 103A is configured to be prevented from falling off by the string-like member 301.

In other words, the configuration of the second embodiment is generally the same as the first configuration, except that the antenna elements 101A to 101E are formed in a cage shape, and the connecting member 310 is formed in a string shape. The bent member formed of the member 301 and the fixing member 302 for fixing a predetermined portion of the string member 301 are formed.
01, for example, one of the annular portions 301A is connected to the above-described distal end portion, that is, the support arms 102A to 102A.
The above-described antenna element 101 provided at the position of the tip of E
Holding parts 103A to 103A for holding A to 101E
The above-mentioned support arms 102A to 102E having an outer shape smaller than 3E.
102E, i.e., the small external support arm portion, is fixed by the fixing member 302, and the string-shaped member 30 is fixed.
One second part, for example, an intermediate part of the string-like member 301 is passed through the cage part 101y of the cage-like body, or
It is wound around the basket frame 101a of the basket portion 101x, and the third portion of the string-like member 301, for example, the other annular portion 301B is fixed to the small external support arm portion by the fixing member 302. This constitutes the third configuration described above.

The structure of the connecting body 310 in the case of the [large basket antenna type] configuration in FIG. 2 is the same as that of the connecting body 310 in the case of the [small basket antenna type] configuration in FIG. It is needless to say that the structure can be changed so that the body 301 is passed through the basket portion 101x so as to obtain the same effect as the [small basket antenna type] structure in FIG.

[Third Embodiment] The third embodiment will be described below with reference to FIGS. This third embodiment is an embodiment in which the way of fixing the connecting member 310 in the first embodiment of FIG. 1 is changed, and where the configuration of the third embodiment is different from that of the first embodiment, The portions where the annular portions 301 and 301B at both ends of the string-shaped member 301 of the member 310 are fixed by the fixing portion 302 are changed to positions farther apart than in the case of the above-described first embodiment, and become longer by the distance. The middle part of the string-shaped member 301 is fixed by a fixing member 303 such as [inverted claw band type] in FIG.

More specifically, one annular portion 301A of the string 301 is attached to the supporting arm 102A by the fixing member 3A.
02 is fixed to the stay mounting portion of the support arm 102A, that is, closer to the center position 110 than the position where the fixing holding member 104A, the first rod-shaped member 105A, and the second rod-shaped member 106A are provided. By changing to a closer part, the first
The supporting arm 102 having higher strength than the case of the embodiment
A. If the fixing portion between the holding portion 103A and the support arm 102A is cracked and broken due to the above minute vibration, or if the set screw of the connecting portion is loosened and loosened, However, the string-shaped member 301 fixed to the supporting arm 102A with the fixing member 302 is configured such that the integrated portion of the antenna element 101A and the holding portion 103A can be prevented from falling off by the string-shaped member 301.

Further, the portion for fixing the fixing member 302 to the straight rod-like body of the antenna element 101A is also changed to a part closer to the distal end side where the straight rod-like body becomes thinner than in the first embodiment. As a result, suppose that the connecting portion 101A of the antenna element 101A is formed by a straight rod-like body due to the minute vibration.
Even if the tube part very close to the pipe is cracked and damaged, the fixing member 302 is located further distally than the damaged part.
By fixing the string-shaped member 301 with the string-shaped member 301, the portion of the antenna element on the tip side from the damaged portion is
It is configured so that it can be prevented from falling off by the setting of 01.

Further, by fixing the middle part of the string-shaped member 301 at an appropriate interval with the fixing member 303, the middle part of the string-shaped member 301 is prevented from fluctuating due to wind pressure and wind and rain pressure to cause fatigue damage. It is composed.

The fixing member 303 is formed by mixing a carbon powder into a polyamide-based weather-resistant synthetic resin material, for example, trade name "66 nylon resin", as shown in FIG. A hook portion 303b having a sawtooth cross section is provided on the outer surface of the band 303a, and a check portion 303e having a guide hole 303c into which the band 303a can enter and a check claw 303d is provided at one end of the band 303a. The other end of the strip 303a is formed at the release end 303f, so that the strip 303a is wound around a position where the part is to be fixed, and then the release end 303f is inserted into the guide hole 303f.
c, the release end 302f is strongly pulled, and the portion wound around the band-shaped body 303a is tightened, so that the band-shaped body 303a can be fixed at the position by the check claw 303d. Thai Wrap "
It is.

That is, the configuration of the third embodiment generally includes the distal end portions of the plurality of support arms 102A to 102E radially projecting from the center position 110 into a horizontal plane, that is, the distal end portion. Antenna elements 101A to 101E vertically projecting vertically from the position of
In order to suppress the horizontal movement of the support arms 102A to 102E, first horizontal rods 105A to 105E are provided between the intermediate portions of the support arms 102A to 102E.
In order to prevent the vertical movement of the support arms 102A to 102E.
An oblique second rod-like body 106 is formed between the middle part between 2A and 102E and the columnar body 130 provided at the center position 110.
A to 106E and the direction of arrival D of the radio wave based on a reception signal obtained by receiving a predetermined radio wave by the antenna elements 106A to 106E.
1 in the wireless direction finding apparatus 500 for detecting

The connection portions 101A1 to 101E1 for connecting and fixing the antenna conductors 101A to 101E and the support arms 102A to 102E are separately provided.
A connecting member 310 mainly composed of a bent body made of a material that does not affect the above-mentioned radio waves, for example, a cord-shaped member 301 mainly made of a material in which a core material 301a of reinforced glass fiber is covered with a coating material 301b of weather resistant vinyl chloride. Connecting member 310
Accordingly, the antenna body 101A to 101E and the center position 110 of the support arm bodies 102A to 102E are closer to the center position 110 than to the parts where the first and second rod-like bodies 105A to 105E and 106A to 106E are fixed. This constitutes the above-described fourth configuration in which a connecting means for connecting between the nearby parts is provided.

Further, in the fourth configuration, the antenna elements 101A to 101E are formed of a straight rod-like body, and the connecting member 310 is connected to the above-mentioned bent body made of a string-like member 301 and the above-mentioned bent body. It is formed by a fixing member 302 for fixing a predetermined portion of the string-shaped member 301, and the first portion of the string-shaped member 301, for example, one of the annular portions 301A is connected to the above-mentioned supporting arm members 102A to 102A. 10
2E, the first and second rod-like bodies 105A to 105E.
The second portion of the cord-like member 301, for example, is fixed to the portion closer to the center position 110 than the portion to which 106A to 106E is fixed by the fixing member 302, for example,
The above-described fifth configuration is configured such that the other annular portion 301B is fixed to a portion of the straight rod-shaped body closer to the distal end side than the connection portions 101A1 to 101E1 by the fixing member 302. Different.

[Fourth Embodiment] The fourth embodiment will be described below with reference to FIGS. 4, 5 and 7. This fourth embodiment is an embodiment in which the way of fixing the connecting member 310 in the above-described second embodiment of FIG. 2 is changed, and the points where the configuration of the fourth embodiment differs from the configuration of the second embodiment are as follows. The member 310 is supported
Only the part to be fixed to 2A is changed and configured similarly to the same part in the third embodiment of FIG.

More specifically, one of the annular portions 301A of the string 301 is attached to the support arm 102A by the fixing member 3A.
02 is fixed to the stay mounting portion of the support arm 102A, that is, closer to the center position 110 than the position where the fixing holding member 104A, the first rod-shaped member 105A, and the second rod-shaped member 106A are provided. By changing to a close part, the second
The supporting arm 102 having higher strength than the case of the embodiment
A, and if the micro vibration causes a crack near the fixed portion between the holding portion 103A and the support arm 102A due to the above microvibration and breaks, or the set screw of the fixed portion is loosened and comes off. Even if the support arm 102A
The string-shaped member 301 fixed by the fixing member 302 is configured so that the integrated portion of the antenna element 101A and the holding portion 103A can be prevented from falling off by the string-shaped member 301.

Although not shown, the antenna element 1
The way of connecting the connecting member 310 to 01A, that is, the way of connecting the string-like member 301 is changed to a structure that only passes through the basket portion 101x as in the case of the structure of FIG. 3 in the third embodiment. The fourth embodiment is also included in the fourth embodiment.

Therefore, according to the structure of the fourth embodiment, the structure for connecting the connecting member 310 to the supporting arm 102A, that is, the structure for fixing the string-like member 301 to the supporting arm 102A by the fixing member 302. Can be prevented from falling off in the same manner as in the same part of the third embodiment.

The connecting member 310 is connected to the antenna element 10.
1A, that is, the string 301 is passed through the cage portion 101x of the cage of the antenna element 101A,
Alternatively, the string 301 is connected to the cage frame 1 of the antenna element 101A.
The portion to be wound around 01a can be prevented from falling off in the same portion of the configuration of FIG. 2 of the second embodiment, and can be prevented from falling off in the same manner as the same portion of the configuration of FIG. 3 of the second embodiment.

That is, the configuration of the fourth embodiment is generally the same as the fourth configuration except that the antenna elements 101A to 101E are formed in a cage shape and the connecting member 310 is formed in a string shape. The bent member formed of the member 301 and the fixing member 302 for fixing a predetermined portion of the string member 301 are formed.
01, for example, the one annular portion 301A is located at the center position more than the position where the first and second rod-like members 105A to 105E and 106A to 106E of the support arm 102A102E are fixed. A portion close to 110, that is, a center side supporting arm portion, is fixed by the fixing member 302, and a second portion of the string-shaped member 302, for example, an intermediate portion of the string-shaped member 302 is formed in the basket shape. Pass through the cage portion 101x of the body, that is, the cage-shaped body of the antenna elements 101A to 101E, or the cage portion 101x described above.
The third portion of the string-shaped member 301, for example, the other annular portion 301B is fixed to the center-side support arm portion by the fixing member 302. 6 is configured.

[Modification] The present invention includes the following modifications. (1) The string-like member 301 in the configuration of the first embodiment of FIG. 1 or the third embodiment of FIG. 6 is replaced with a portion corresponding to the annular portion 301B as shown in FIG. An end fixed portion 301e is attached to the terminal 301d of the string-shaped member 301.
In the same manner as described above, the terminal portion 301d is changed to a reinforced structure, and the terminal portions 301d and 301e are positioned at a position through the fixing member 302 as shown in [terminal fixing type] in FIG.

(2) The first embodiment shown in FIG. 1 or the third embodiment shown in FIG.
In the configuration of the embodiment, the upper and lower antenna elements 101A to 101A to
Each of the string members 301 individually arranged in the 101E is changed to one continuous common string member 301, and the second string member 301 of the string member 301 is changed as shown in FIG. The part is changed to the middle part 301Y of the cord-like member 301, and the middle part 301Y is changed to be fixed to the straight rod-like body of the antenna elements 101A to 101E by the fixing member 302.

(3) The first embodiment shown in FIG. 1 or the third embodiment shown in FIG.
In the configuration of the embodiment, the upper and lower antenna elements 101A to 101A to
The two upper and lower string members 301 which are individually arranged on 101E are respectively connected to annular portions 301A and 301 on the intermediate portion of one string member 301 as shown in FIG.
The annular portions 301C and 301D similar to B are changed to string-shaped members 301X provided at a distance, and the fixing members 302 on the antenna elements 101A to 101E side are changed so as to be fixed through the annular portions 301C and 301D. And configure.

(4) In the structures of the first to fourth embodiments and the above (1) to (3), each fixing member 302
The first part to the third part of the string-shaped member 301 to be fixed are changed to other appropriate parts, for example, the support arms 102A to 102A.
The part fixed to the 02E side is changed to a middle part of the cord-like member 301 or the like.

(5) The portion of the antenna device 100 in the first to fourth embodiments is the same as the group of a plurality of antenna devices 100 according to the eighth prior art having the [multi-stage antenna type] configuration shown in FIGS. The configuration is changed to the [multistage antenna type] having the antenna device 100 group, and
The antenna switching portion 24 in the seventh prior art is provided on the input side of
The antenna switching section 240 similar to the antenna switching section 240 is provided.

(6) The portion of the antenna device 100 in the first to fourth embodiments is the same as the group of a plurality of antenna devices 100 according to the eighth prior art having the [multistage antenna type] configuration of FIGS. The configuration is changed to a [multi-stage antenna type] having a group of antenna devices 100, and each antenna element 101A of each antenna device 100 is similar to the ninth prior art.
Each of the receiving parts 210 obtained from .about.101E is provided to a separate receiving part 210, a direction detecting part 220, and a direction displaying part 130, respectively, and at the same time, the arrival direction D1 of the radio wave of each frequency band is detected. .

(7) In the configuration of FIG. 3 of the second embodiment,
Fixing member 30 for fixing to supporting arms 102A to 102E
1 is a position close to the holding portions 103A to 103E,
For example, by changing to the position indicated by the arrow 301R, the slack of the string-shaped member 301 is reduced. (8) In the configuration of the second embodiment shown in FIG.
By fixing the middle part of the string-like member 301 along 2A to 102E, for example, the position indicated by the arrow 301R with the fixing member 303, the string-like member 301 is configured to have no slack.

(9) The bent member of the connecting member 310 formed by the string-shaped member 301 is connected to another member, for example, the covering member 30.
A string-shaped body formed only of the core material 301 without 1b, or
The structure is changed to a chain formed by a chain formed of a synthetic resin material containing a reinforcing fiber such as a polyester resin or an epoxy resin containing glass fibers.

(10) In the configuration of [Large basket antenna type] or [Small basket antenna type], the shape of the basket portions 101x and 101y is changed to another shape, for example, the basket frame 101a is formed into a "U-shaped" rod-like or tubular body. The antenna device 100 is formed in a cage portion, for example, by being formed with a rough net-like body.

(11) In the configuration of FIG. 3 of the second embodiment, the supplementary winding type of FIG. 8 is applied to the annular portions 301A and 301B of the string-like member 301 fixed to the support arms 102A to 102E. After passing through a string-like member 301Z similar to the string-like member 301 as shown in FIG.
E · 301F is modified and fixed to any one of the mounting seat portions 102A2 to 102E2 by a fixing member 302X / protective layer 340 similar to the fixing member 302 / protective layer 320. (12) In the configuration of FIG. 3 of the second embodiment, the plurality of string members 301 separately fixed to the support arms 102A to 102E are all changed to one continuous string member 301. An annular portion 301A.3 of one string-like member 301
01B is fixed to any one supporting arm, for example, the supporting arm 102A in the same manner as in FIG.
The fixing member 302 and the protective layer 3 disposed on the other supporting arm while passing the middle part of
The structure is modified so as to be fixed through 20.

[0085]

According to the present invention, as described above, for fixing the connection between each antenna element and each supporting arm, a material which does not affect the radio wave is provided separately from the regular connection portion. The base of the antenna element is cracked by micro-vibration due to wind pressure and wind and rain pressure, and the holding part holding the antenna element and the fixing part of the support arm are connected. Even if the vicinity is damaged or the set screw on the fixed part is loosened and comes off, the antenna element
Since the holding part is prevented from falling off by the connecting member, it is possible to prevent accidents that harm buildings and livestock passing below, and to prevent radio wave direction detection from being affected. There are features that can be provided.

[Brief description of the drawings]

1 to 8 show an embodiment of the present invention, and FIGS.
19 to 19 show the prior art, and the contents of each figure are as follows.

FIG. 1 is an enlarged perspective view of a main part configuration.

FIG. 2 is an enlarged perspective view of a main part configuration.

FIG. 3 is an enlarged perspective view of a main part configuration.

FIG. 4 is an enlarged perspective view of a main part disassembled element.

FIG. 5 is an enlarged perspective view of a main part disassembled element.

FIG. 6 is an enlarged perspective view of a main part configuration.

FIG. 7 is an enlarged perspective view of a main part configuration.

FIG. 8 is an enlarged perspective view of a main part configuration.

FIG. 9 is a front view of the entire configuration.

FIG. 10 is an overall configuration plan view.

FIG. 11 is an enlarged perspective view of a main part configuration.

FIG. 12 is a front view of the entire configuration.

FIG. 13 is an overall configuration plan view.

FIG. 14 is an enlarged perspective view of a main part configuration.

FIG. 15 is a front view of the entire configuration.

FIG. 16 is an overall configuration plan view.

FIG. 17 is an enlarged perspective view of a main part configuration.

FIG. 18 is a front view of the entire assembly configuration.

FIG. 19 is a front view of the entire assembly configuration.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 antenna device 100X antenna device 100U antenna device 100a reception signal 101A to 101E antenna element 101A1 to 101E1 connection portion 101a basket frame 101b corner portion 101c annular body 101d cylindrical body 101e set screw 101f cylindrical body 101g boss portion 101h boss portion 101j set screw 101x Basket part 101y Basket part 102A-102E Support arm body 102A1-102E1 Tip part 102A2-102E2 Attachment seat part 102A3-102E3 Intermediate part 103A-103E Holding part 104A-104E Fixing holder 105A-105E First rod-like body 106A To 106E Second rod-like body 107A to 107E Fixing holder 110 Center position 120 Center base support 130 Columnar body 130X Columnar body 131 Distribution box 180 Lightning rod 210 Reception part 210a Amplified signal 220 Direction detection part 220a Direction signal 230 Direction display part 240 Antenna switching part 301 String member (bent body) 301A Ring part 301B Ring part 301C Ring part 301D Ring part 301a Core material 301b Coating material 301d Terminal part 301e End fixing part 301R Arrow point 301X String member 301Y Intermediate part 301Z String member 302 Fixing member 302a Strip 302b Toothed hole 302c Worm 302d Driver groove 302e Worm mechanism part 302f Open end 302g Guide hole 303a Belt 303b Hook portion 303c Guide hole 303d Non-return claw 303e Non-return portion 303f Open end 310 Connecting member 320 Protective layer 320A Vinyl chloride Group 330 Protective layer 330A Vinyl chloride tape 500 Radio direction detector D0 Reference direction D1 Arrival direction X1 Top side X2 Bottom side θ Angle value

Claims (6)

[Claims] 1. A method according to claim 1, wherein a predetermined radio wave is received by an antenna element vertically projecting vertically from a plurality of support arms extending radially from a center position into a horizontal plane. A radio direction finder for detecting a direction of arrival of a radio wave, wherein a bent portion made of a material that does not affect the radio wave is provided separately from a connection portion for connecting and fixing between the antenna element and the support arm. And a connecting means for connecting between the antenna body and the supporting arm body by a connecting member mainly composed of: 2. The method according to claim 1, wherein the antenna element is formed as a straight rod.
The connecting member is formed by the bent body formed of a string-shaped member and a fixing member for fixing a predetermined portion of the string-shaped member, and a first portion of the string-shaped member is provided at the distal end portion. The support arm has a smaller outer shape than a holding portion for holding the antenna element, and is fixed to the portion of the support arm by the fixing member, and a second portion of the string-shaped member is connected to the connecting portion of the straight rod-shaped member. The wireless direction detecting device according to claim 1, wherein the wireless direction detecting device is fixed to a portion closer to a distal end than the portion by the fixing member. 3. The antenna element is formed by a cage, and the connecting member is formed by the bent body formed of a string-shaped member and a fixing member for fixing a predetermined portion of the string-shaped member. The first portion of the string-like member is attached to a portion of the support arm having a smaller outer shape than a holding portion for holding the antenna element provided at the distal end portion (hereinafter, referred to as a small outer shape support arm portion). It is fixed by the fixing member, and the second part of the cord-like member is passed through the basket part of the basket-like body, or wound around the basket frame of the basket-like part, and the third part of the cord-like member is 2. The wireless direction detecting device according to claim 1, wherein a part is fixed to the small external supporting arm part by the fixing member. 4. In order to suppress a horizontal movement of the support arm, a plurality of antenna elements are provided which extend vertically from a center portion of the support arm in a horizontal plane in a horizontal plane. A middle portion between the support arms, which is fixed by a horizontal first rod-like body between the middle portions of the support arms, and a middle portion of each of the support arms to suppress vertical movement of the support arms; And a second rod-like body that is fixed at an angle to the columnar body, and that detects the direction of arrival of the radio wave based on a reception signal obtained by receiving a predetermined radio wave by the antenna element. A direction finding device, wherein a connecting member mainly composed of a bent body made of a material that does not affect the radio wave is provided separately from a connecting portion for connecting and fixing the antenna element and the supporting arm. With the antenna body Radio direction finding apparatus characterized by comprising a connecting means for connecting the portion close to the center position than the site of fixing the said first and second rod-shaped body of the support arms. 5. The antenna element is formed of a straight rod-like body,
The connecting member is formed by the bent body formed of a string-shaped member and a fixing member for fixing a predetermined portion of the string-shaped member, and the first portion of the string-shaped member is formed by the support arm body. The first and second rods are fixed to a portion closer to the center position than the portion to which the first and second rods are fixed by the fixing member, and the second portion of the string-shaped member is connected to the connecting portion of the straight rod. 5. The wireless direction detecting device according to claim 4, wherein the wireless direction detecting device is also fixed to a portion on the distal end side by the fixing member. 6. The antenna element is formed by a cage, and the connecting member is formed by the bent body formed of a string-shaped member and a fixing member for fixing a predetermined portion of the string-shaped member. The first portion of the string-shaped member is closer to the center position than the portion of the support arm to which the first and second rod-shaped members are fixed (hereinafter, referred to as a center-side support arm portion).
To the second member of the string-shaped member.
Is passed through the basket part of the basket-like body or wound around the basket frame of the basket part, and the third part of the cord-like member is fixed to the center-side support arm part by the fixing member. The wireless direction finding apparatus according to claim 4, wherein