JP2015201770A - Gas pressure type waveguide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas pressure type waveguide with light-weight and excellent in housing property.SOLUTION: A gas pressure type waveguide 1 includes a tubular first isolator 2a; a conductor 2b disposed on a surface of the first isolator 2a; and a conductor tube 2 having flexibility. A gas region 4 formed inside the first isolator 2a and filled with gas G of pressure equal to or larger than atmospheric pressure.

Description

  The present invention relates to a waveguide used as an antenna feed line or the like.

  Conventionally, a waveguide is used as an antenna feed line or the like (see, for example, Patent Document 1). The waveguide includes a conductor tube made of a metal such as copper or aluminum and formed in a tubular shape, and a corrosion-resistant sheath made of polyethylene or the like formed around the conductor tube. In order to increase the flexibility of the waveguide, the conductor tube is formed with an elliptical cross section and a corrugated or spiral outer shape. Further, a moisture-proof compound may be provided between the conductor tube and the anticorrosion sheath.

Japanese Patent Laid-Open No. 3-195103

  However, since the strength of the conventional waveguide is ensured so that the conductor tube is not damaged by the external pressure or the outer shape of the conductor tube is not greatly deformed, for example, the volume during storage or transportation can be reduced. There are restrictions on weight reduction, and for example, it has been difficult to store and transport the waveguide for recovery from a disaster.

  Therefore, an object of the present invention is to provide a gas pressure type waveguide that is lightweight and has excellent accommodation.

  In order to solve the above-described problems, according to one embodiment of the present invention, a tubular first insulator and a conductor provided on a surface of the first insulator are provided, and the flexibility is provided. There is provided a gas pressure waveguide in which a gas region filled with a gas having a pressure equal to or higher than atmospheric pressure is formed inside the first insulator.

  In another aspect of the present invention, the conductor is provided on an inner peripheral surface of the first insulator.

  The first insulator is formed by connecting a plurality of annular tube bodies, and a through-hole that allows the gas to move between the tube bodies is formed in the connecting portion of the tube bodies.

  In another aspect of the present invention, the semiconductor device further comprises a second insulator provided on the surface of the conductor.

  In another aspect of the present invention, the first and second insulators are attached to one end and the other end of the first insulator to keep the gas region airtight, and have a gas flow port through which the gas flows. A second airtight holding part is further provided.

  In another aspect of the present invention, the apparatus further includes a plurality of restricting members that are provided on the inner peripheral surface of the conductor tube and hold the cross-sectional shape in the short direction of the conductor tube in an elliptical shape.

  ADVANTAGE OF THE INVENTION According to this invention, the light pressure type waveguide which was lightweight and excellent in the accommodating property can be provided.

1 is a perspective view of a gas pressure waveguide according to a first embodiment of the present invention. The gas pressure type | mold waveguide is shown, (a) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of (a). The storage state of a gas pressure type | mold waveguide is shown, (a) is a top view, (b) is CC sectional view taken on the line of (a). It is sectional drawing explaining the gas-pressure-type waveguide which concerns on the 2nd Embodiment of this invention.

[First Embodiment]
FIG. 1 is a perspective view showing a pneumatic waveguide according to a first embodiment of the present invention. 2A and 2B show a cross section of the pneumatic waveguide, wherein FIG. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG.

  The gas pressure type waveguide 1 is used as a power supply line to an antenna for television broadcasting, for example, and propagates a microwave high frequency signal of several hundred MHz or more. The gas pressure waveguide 1 is temporarily used, for example, when a broadcasting facility is damaged in a disaster, and is normally stored in a warehouse or the like.

(Configuration of the gas pressure type waveguide 1)
As shown in FIGS. 1 and 2, the pneumatic waveguide 1 has a tubular insulator 2a (first insulator) and a conductor 2b provided on the surface of the insulator 2a. A conductive tube 2 having the characteristics is provided. The conductor tube 2 has a central portion D formed hollow along the longitudinal direction, and has an inner peripheral surface 21 on the center portion side and an outer peripheral surface 22 on the outer side. The insulator 2 a includes a gas region 4 in which a gas G having a pressure equal to or higher than atmospheric pressure is filled, and an airtight holding unit 5 that ensures the airtightness of the gas region 4.

  The conductor tube 2 has flexibility, and becomes tubular as shown in FIG. 1 by filling the gas region 4 with a gas G having a pressure equal to or higher than the atmospheric pressure. Further, when the gas G in the gas region 4 is extracted, the volume can be reduced by being flattened and stored, for example, like a fire hose. The conductor tube 2 has an inner peripheral surface 21 and an outer peripheral surface 22 each formed in a corrugated shape. Thereby, when the pneumatic waveguide 1 is laid, it is possible to suppress the collapse of the pneumatic waveguide 1 due to bending.

(Configuration of conductor tube 2)
The insulator 2a of the conductor tube 2 is made of, for example, a flexible resin material such as polyethylene and has flexibility. The thickness of the insulator 2a is 1 mm, for example. However, the thickness may be different to the extent that flexibility is not impaired. The conductor 2b is provided on the inner peripheral surface of the insulator 2a. By providing it on the inner peripheral surface of the insulator 2a, it is possible to prevent the conductor 2b from being damaged by contact with the outside when the pneumatic waveguide 1 is laid. Note that the conductor 2b can be protected by further providing a second insulator on the surface of the conductor 2b. When the second insulator is provided on the surface of the conductor 2b, the conductor 2b can be formed on the outer peripheral surface of the insulator 2a.

  The insulator 2a is formed by connecting a plurality of annular tube bodies 3 together. Each tube body 3 has a hollow interior in order to fill the gas G. The tube bodies 3 have substantially the same size, and are connected in surface contact with each other. Therefore, the connection part 3a which each tube body 3 has connected becomes an annular | circular shape. A through hole 7 that allows the gas G to move between adjacent tube bodies 3 is formed in the connecting portion 3a. In this Embodiment, in order to accelerate | stimulate the movement of the gas G between the tube bodies 3, the six through-holes 7 are formed in each connection part 3a, and each through-hole 7 is long in the circumferential direction of the connection part 3a. It is formed in an elongated shape. When the gas region 4 is filled with the gas G having a pressure equal to or higher than the atmospheric pressure Pa, the tube body 3 generates tension by the internal pressure Pg of the gas region 4 and maintains an annular shape. Moreover, the insulator 2a can hold | maintain a tubular shape as a whole because each tube body 3 hold | maintains an annular shape.

  The conductor 2b is formed including a highly conductive metal material such as copper, for example. In the present embodiment, the conductor 2b is provided so as to cover substantially the entire inner peripheral surface of the insulator 2a. For example, the conductor 2b includes a nickel or chromium underlayer formed on the inner peripheral surface of the insulator 2a and a copper layer formed so as to cover the underlayer. The underlayer and the copper layer can be formed using, for example, a sputtering plating method.

  Moreover, in this Embodiment, the thickness t2 of the conductor 2b is formed thinner than the thickness t1 of the insulator 2a. This is because the frequency of the signal propagating through the gas pressure type waveguide 1 is high, the skin effect is generated, the current is concentrated on the surface of the conductor 2b, and it is not necessary to form a thick film. In order to increase the flexibility of the tube 2, it is desirable to reduce the thickness of the conductor 2b.

  For example, when a signal with a frequency of 1 GHz propagates, the skin depth of the copper layer through which the signal propagates is approximately 2 μm. The skin depth decreases as the frequency of the propagated signal increases. Accordingly, the thickness t2 of the conductor 2b is determined according to the frequency of the signal used. In the present embodiment, the thickness t2 of the conductor 2b is preferably, for example, 5 μm or more and 50 μm or less, more preferably 10 μm or more and 30 μm, considering cracks or peeling due to bending. In FIG. 2, the thickness of the insulator 2a and the conductor 2b is exaggerated for the sake of explanation.

(Structure of the airtight holding part 5)
The airtight holding portion 5 is attached to the one end portion 10 a and the other end portion 10 b of the conductor tube 2 and holds the airtightness of the gas region 4. A gas flow port 6 through which the gas G flows is formed in at least one of the airtight holding portions 5 of the both end portions 10a and 10b.

  The airtight holding portion 5 is formed in an annular shape using a resin material such as polyethylene, for example, similarly to the insulator 2a. The hermetic holding portion 5 has substantially the same inner diameter and outer diameter as the tube body 3 constituting the insulator 2a. The tube body 3 positioned at the end portions 10a and 10b of the gas pressure waveguide 1 is cut into approximately equal halves, and the cut tube body 3 and the airtight holding portion 5 are fixed using, for example, an adhesive. Yes.

  As shown in FIG. 1, a circular gas circulation port 6 is provided in at least one of the airtight holding portions 5 of the both end portions 10 a and 10 b. The gas flow port 6 is provided to connect a pump for sending and discharging the gas G when the gas G is filled in the gas region 4 and when the gas G filled in the gas region 4 is discharged to the outside. It has been.

  Here, the gas G filled in the gas region 4 is preferably an inert gas whose main component is nitrogen, argon or the like. However, the present invention is not limited to this, and the gas whose pressure is increased by a pump may be supplied to the gas pressure waveguide 1 as the gas G.

  3A and 3B show the storage state of the antenna feeder 100 by the gas pressure waveguide 1 of the present embodiment, where FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along the line CC of FIG.

  As shown in FIG. 3, the gas pressure type waveguide 1 is formed into a flat shape by extracting the gas G in the gas region 4, and is stored in, for example, a spiral shape.

(Second Embodiment)
FIG. 4 is a cross-sectional view for explaining a pneumatic waveguide 11 according to the second embodiment of the present invention. The same members as those in the first embodiment are given the same numbers.

  The pneumatic waveguide 11 according to the second embodiment includes a plurality of regulating members 8 that are provided on the inner peripheral surface of the conductor tube 2 and hold the cross-sectional shape in the short direction of the conductor tube 2 in an elliptical shape. This is different from the pneumatic waveguide 1 of the first embodiment.

  The regulating member 8 is formed into a thread shape or a sheet shape using, for example, a low stretchable resin material. The regulating member 8 has an end fixed to the inner peripheral surface of the insulator 2 a of the conductor tube 2. As shown in FIG. 4, two regulating members 8 are provided at positions that are parallel to the short axis and line-symmetric with respect to the short axis. When the gas region 4 is filled with the gas G having a pressure equal to or higher than the atmospheric pressure Pa, the tube body 3 (conductor tube 2) tries to maintain an annular shape by the internal pressure Pb of the gas region 4, but the regulating member 8 Restricts the distance in the short axis direction of the tube body 3 so that it does not increase by a predetermined distance. Accordingly, when the gas region 4 is filled with the gas G having a pressure equal to or higher than the atmospheric pressure Pa, the cross-sectional shape in the short direction of the conductor tube 2 can be held in a substantially elliptical shape. In addition, by adjusting the position and the number of the restricting members 8, a cross-sectional shape other than an ellipse (for example, a rectangle) can be obtained.

(Function and effect)
According to the embodiment described above, the following operations and effects can be obtained.

(1) In the state where the gas region 4 is not filled with gas, the gas pressure type waveguide 1 can be compressed, for example, in a belt shape to reduce the volume, and can be folded or wound in a spiral shape for storage. Is possible. Thereby, for example, it becomes easy to store the gas pressure type waveguide 1 for recovery in a disaster. In addition, the gas pressure type waveguide 1 has a light weight per unit length as compared with, for example, a conventional waveguide. It becomes possible.

(2) Since the conductor 2b is provided on the inner peripheral surface of the insulator 2a, it is possible to prevent the conductor 2b from being damaged even when the pneumatic waveguide 1 is folded or laid, for example.

(3) Since the insulator 2a is formed by connecting a plurality of annular tube bodies 3, when the gas pressure waveguide 1 is filled with the gas G, the corrugated inner circumference is formed along the longitudinal direction. The surface 21 and the outer peripheral surface 22 are provided. Thereby, the gas pressure type waveguide 1 can be easily bent. Furthermore, the connection part 3a which each tube body 3 has connected functions as a structure for maintaining the shape of the insulator 2a when the gas G is filled. Thereby, the pneumatic waveguide 1 can maintain a tubular shape more reliably. For this reason, the gas pressure type waveguide 1 can be lengthened.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  The present invention can be appropriately modified and implemented without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Gas pressure type | mold waveguide, 2 ... Conductor tube, 2a ... Insulator (1st insulator), 2b ... Conductor, 3 ... Tube body, 3a ... Connection part, 4 ... Gas area, 5 ... Airtight holding part , 6 ... gas flow port, 7 ... through hole, 8 ... regulating member, 10a, 10b ... end, 11 ... gas pressure waveguide, 21 ... inner peripheral surface, 22 ... outer peripheral surface, G ... gas, Pa ... large Atmospheric pressure, Pg ... Internal pressure

Claims (6)

A tubular first insulator and a conductor provided on a surface of the first insulator, and including a flexible conductor tube;
A gas pressure waveguide in which a gas region filled with a gas having a pressure equal to or higher than atmospheric pressure is formed inside the first insulator.   The pneumatic waveguide according to claim 1, wherein the conductor is provided on an inner peripheral surface of the first insulator. The first insulator is formed by connecting a plurality of annular tube bodies,
A through hole that allows the gas to move between the tube bodies is formed in the connecting portion of the tube bodies,
The pneumatic waveguide according to claim 1 or 2. A second insulator provided on a surface of the conductor;
The gas pressure type waveguide according to any one of claims 1 to 3. First and second airtight holding portions attached to one end and the other end of the first insulator to keep the gas region airtight and having a gas flow port through which the gas flows are further provided. Prepared,
The pneumatic waveguide according to any one of claims 1 to 4. A plurality of regulating members provided on the inner peripheral surface of the conductor tube, and holding a cross-sectional shape in the short direction of the conductor tube in an elliptical shape;
The gas pressure type waveguide according to any one of claims 1 to 5.