KR102500374B1 - Satelite antenna having mutli-band feeder - Google Patents

Abstract

The present invention relates to an antenna with a multi-band feeder capable of varying an azimuth and an elevation depending on a position of a satellite and more precisely varying the azimuth and the elevation by considering latitude in which the antenna is installed. The antenna with a multi-band feeder comprises: a first supporting body which is fixed to a base; an inclined supporting body which forms an inclined surface on an upper surface, and is rotated in an upper part of the first supporting body; a second supporting body which forms a rotating surface on an upper surface and is fixed to the inclined surface; a third supporting body which forms elevation rotating axes in both sides and is fixed to the rotating surface of the second supporting body; a reflective plate supporting member which is combined with the elevation rotating axes and is rotated by rotation of the elevation rotating axes; a reflective plate which is combined with a reflective plate supporting member; and a feeder which is combined with a front surface of the reflective plate and receives a signal reflected from the reflective plate.

Description

Antenna with multi-band feeder {SATELITE ANTENNA HAVING MUTLI-BAND FEEDER}

The present invention relates to an antenna for a satellite, and more specifically, to an antenna for a low-orbit satellite.

Low Earth Orbit (LEO) artificial satellites are artificial satellites that move at altitudes of 200 to 2,000 km. Due to the characteristics of moving at low altitudes from the ground, the round-trip distance of radio waves transmitted through the satellites is short, so the signal loss is relatively small. It is mainly used for communication services.

However, since a low-orbit satellite moves rapidly at a speed of 7.5 km per second due to its low altitude, it takes only about 10 minutes to pass through the sky over Korea. The reflector must be moved accurately and quickly, and considering that the diameter of the reflector of an antenna is generally more than 3 meters, a high level of technology in various fields such as motor and control is required to move the reflector accurately and quickly.

In addition, since the satellite antenna is installed in a limited location outside where transmission and reception failure does not occur due to surrounding structures, it must be durable and designed to cope with external environmental factors such as wind that exerts an external force on the reflector.

In addition, due to the characteristics of being installed in a limited location, it should be designed to transmit and receive satellites using various frequencies such as L-band, X-band, and S-band.

Republic of Korea Patent Publication 10-2001-0031359 (published on April 16, 2001)

An antenna equipped with a multi-band feeder according to the present invention is intended to be driven accurately and quickly so as to correspond to low-latitude satellites.

In addition, it is intended to be able to vary the length of the reflector and the feeder in correspondence with the feeder so as to correspond to a plurality of bands.

In addition, it is intended to be able to fix each driving unit in order to minimize failure of the antenna when strong winds are predicted or detected.

An antenna having a multi-band feeder according to an embodiment of the present invention includes a first support fixed to a base; an inclined supporter having an inclined surface formed on an upper surface thereof and rotatably connected to an upper portion of the first supporter; A second supporter having a rotating surface formed on the upper surface and fixed to the inclined surface; A third supporter having embossed rotation shafts rotatable on both sides and fixed to the rotational surface of the second supporter; A reflector support member coupled to the embossed rotation shaft and rotated according to the rotation of the embossed rotation shaft; a reflector coupled to the reflector support member; And a feeder coupled to the front surface of the reflector and receiving a signal reflected from the reflector, and the embossed rotation shaft is disposed perpendicular to the rotation surface of the second support, and the inclined support has one side higher than the other side, so that one inclined surface is the other inclined surface. It is formed lower, and the slope between one end and the other end of the slope corresponds to the latitude of the base.

Preferably, a feeder support rod is disposed between the front surface of the reflector and the feeder of the antenna having a multi-band feeder according to an embodiment of the present invention, the feeder receives signals of multiple bands, and the length of the feeder support rod is variable. do.

A feeder support rod of an antenna having a multi-band feeder according to an embodiment of the present invention includes a lower rod having a lower through-hole formed at a lower portion and an open upper portion; an upper rod inserted through an upper portion of the lower rod, an open lower portion, and an upper through hole formed thereon; Screw shafts disposed inside the lower rod and the upper rod; When the screw shaft rotates, the nut moves up and down along the screw shaft according to the rotation direction of the screw shaft; A rod support extension piece protruding from the outer surface of the nut and coupled to the end of the upper rod; And disposed on the lower rod or the lower rod, it is preferable to include a screw shaft rotation motor coupled to the screw shaft to rotate the screw shaft.

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In the antenna equipped with a multi-band feeder according to the present invention, the effect of varying the azimuth and elevation according to the position of the satellite and more precisely in consideration of the latitude at which the antenna is installed can be expected.

In addition, an effect that can be effectively used for multiple bands can be expected by varying the distance between the reflector and the feeder according to the selected band of the feeder corresponding to the multi-band.

In addition, when a strong wind is predicted or detected, the antenna is moved to an initial position and fixed, thereby minimizing the failure of the antenna.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a perspective view of an antenna according to an embodiment of the present invention.
2 and 3 are cross-sectional views illustrating main parts of the antenna shown in FIG. 1 .
4 is a cross-sectional view of a main part of the feeder support rod shown in FIG. 1;
5 is a perspective view of a reflector according to another embodiment of the present invention.
FIG. 6 is a conceptual diagram illustrating the operation of the reflector shown in FIG. 5 .
7 is a conceptual diagram illustrating a movement sequence of an outer panel when a reflector is operated.
8 is a conceptual diagram illustrating the operation of a reflector according to another embodiment of the present invention.
9 is a conceptual diagram illustrating the operation of a reflector according to another embodiment of the present invention.
FIG. 10 is a front view and an enlarged view of main parts of the reflector shown in FIG. 9 .

A preferred embodiment according to the present invention will be described in detail with reference to the drawings, but the same or similar elements are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

Hereinafter, an antenna according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10 .

Referring to FIG. 1, the antenna according to an embodiment of the present invention includes a first support 100, an inclined support 200, a second support 300, a third support 400, a reflector support member 500, It consists of a reflector 600 and a feeder 700.

The first support 100 is for fixing the antenna to the base (ground) and is composed of a cylindrical shape as shown in FIG. 1, but may be composed of various shapes capable of fixing the antenna.

An inclined support 200 having an inclined surface 210 having a predetermined inclination angle disposed on the upper surface of the first support 100 is disposed. The inclination angle of the inclined surface 210 is to effectively follow the trajectory of a fast-moving low-latitude artificial satellite, and is formed corresponding to the latitude of the base.

As shown in FIG. 2 , the inclined support 200 is configured to rotate on top of the first support 100 . Therefore, when the inclined support 200 rotates, the inclined surface 210 rotates on the first support 100 with a predetermined inclination.

The second support 300 is fixed to the inclined surface 210 disposed on the upper surface of the inclined support 200 . The second support 300 is formed in a cylindrical shape like the first support 100, but is not necessarily limited to this shape, and firmly supports the third support 400 supported by the second support 300 to be described later. It may be formed in any shape capable of supporting and rotating.

A rotation surface 330 rotating on the second support 300 is disposed on the upper surface of the second support 300, and a third support 400 having embossed rotation shafts (not shown) rotatable on both sides of the rotation surface 330. ) is fixed. Accordingly, the third support 400 rotates together with the rotation surface 330 when the rotation surface 330 rotates.

A reflector support member 500 for supporting the reflector 600 is coupled to the embossed rotation shaft. As shown in FIGS. 1 to 3 , the reflector support member 500 is formed in a shape in which both sides are bent downward, the central upper surface is coupled to the reflector 600, and the bent both sides are coupled to the embossed rotation shaft. At this time, counterweights (not shown) are coupled to the bent lower ends of both sides of the reflector support member 500 coupled to the embossed rotation shaft to easily maintain balance during rotation after the reflector 600 is fastened.

The reflector 600 is coupled to the support member 500, and a feeder 700 for receiving a signal reflected from the reflector 600 is coupled to the front surface of the reflector 600 as shown in FIG.

The embossed rotation shaft 410 for rotating the reflector support member 500 is disposed perpendicular to the rotation surface 310 of the second support 300, so that the reflector support member 500 is rotated perpendicular to the rotation surface 310.

In the inclined support 200 described above, the left end of the inclined support 200 is formed lower than the right end so that the left side is higher than the right end based on FIG. 2, so that the inclined surface 210 can correspond to the latitude where the base is disposed. ) is formed with an inclination.

Referring to FIG. 2 , a first rotating plate 130 is rotatably disposed on the upper surface of the first support 100 . The first rotation plate 130 has a first rotation motor 110 disposed on the inner surface of the first support 100 and a first reducer 120 coupled to the driving shaft of the first rotation motor 110, and the first reduction gear It is coupled to the output side of 120, and when the first rotation motor 110 is driven, the rotational force of the first rotation motor 110 is transmitted to the first rotation plate 130 through the first reducer 120. At this time, the inclined support 200 described above is coupled to the first rotary plate 130 to rotate the inclined support 200 when the first rotation motor 110 is driven.

In addition, a second rotation motor 310 is disposed inside the second support 300 coupled to the inclined surface 210 of the inclined support 200 similarly to the first support 100, and the second rotation motor 310 The second reducer 320 is coupled to the drive shaft of the second reducer 320, the output side of the second reducer 320 is coupled to the rotating surface 330 (hereinafter referred to as 'second rotary plate' to be distinguished from the first rotary plate 130) is coupled . Accordingly, the third support 400 coupled to the second rotation plate 330 rotates along the second rotation plate 330 when the second rotation motor 310 is driven.

On both sides of the inside of the third support 400 rotating along the second rotation plate 330, as shown in FIG. 3, an embossed rotation shaft composed of a third rotation motor 410 and a third reducer 420 is disposed, Therefore, when the third rotation motor 410 is driven, the third reducer 420 rotates the reflector support member 500 coupled to the output shaft of the third reducer 420 .

Therefore, the antenna according to the present embodiment rotates the reflector 600 by driving the first rotation motor 110, the second rotation motor 310, and the third rotation motor 410 to follow the movement of the artificial satellite.

According to one embodiment of the present invention, the feeder 700 for receiving satellite signals receives multi-band signals, and the distance between the reflector 600 and the feeder 700 should be changed according to the band.

Accordingly, a feeder support rod 710 having a variable length is coupled between the front surface of the reflector 600 and the feeder 700 .

Referring to FIG. 3, the feeder support rod 710 will be described in more detail. The screw shaft ( 718), a nut 716 that moves up and down along the screw shaft 718 according to the rotational direction of the screw shaft 718 when the screw shaft 718 rotates, and a protrusion formed on the outer surface of the nut 716 The rod support extension piece 716a coupled to the end of the upper rod 714 is disposed on the lower rod 712 or the lower rod 714, and is coupled with the screw shaft 718 to rotate the screw shaft 718. It is composed of a screw shaft rotation motor 718a.

The feeder support rod 710 is rotatably coupled in front of the reflector 600 through the lower through hole 712a formed in the lower part of the lower rod 712, and the upper through hole 714a of the upper rod 714 It is rotatably coupled to the side of the feeder 700 through. Therefore, when the nut 716 rises along the screw shaft 718 by the configuration of the screw shaft rotation motor 718a, the upper rod 714 coupled to the nut 716 rises, and the feeder 700 and the reflector 600 ) increases the distance.

Referring to FIG. 2 , an inclined support fixing plate 200a protruding outward is formed on the inclined support 200, and an inclined support fixing part 200b fixing the inclined support fixing plate 200a to the outer surface of the first support 100. ) is placed. In addition, a third support fixing plate 400a protrudes outwardly from the third support 400, and a third support fixing part 400b fixing the third support fixing plate 400a to the outer surface of the second support 400. ) is placed. In addition, referring to FIG. 3, a through hole (not shown) is formed in the reflector support member 500, and is inserted into the through hole in the third support body 400 corresponding to the through hole to form the reflector plate support member 500. A fixing reflector fixing part 500a is disposed.

The inclined support fixing plate 200a and the inclined support fixing part 200b, the third support fixing plate 400a and the third support fixing part 400b, the through hole of the reflector support member 500 and the reflector fixing part 500a are typhoon This is to prevent the antenna such as the reflector 600 from being shaken and damaged by the strong wind by fixing the reflector 600 when a strong wind blows. In this case, the first rotation motor 110, the second rotation motor 310, and the third rotation motor 410 are driven to move the inclined support fixing plate 200a to a position corresponding to the inclined support fixing part 200b. The support fixing plate 400a is moved to a position corresponding to the third support fixing part 400b and the through hole of the reflector support member 500 is moved to a position corresponding to the reflector fixing part 500a, and the inclined support fixing part 200b ), the third support fixing part 400b and the reflector fixing part 500a fix the inclined support fixing plate 200a, the third support fixing plate 400a, and the reflector support member 500.

In this embodiment, through-holes are formed in the inclined support fixing plate 200a and the third support fixing plate 400a, and A cylinder having a pin inserted into each through hole is disposed and the cylinder is operated to fix the inclined supporter fixing plate 200a, the third supporter fixing plate 400a, and the reflector support member 500.

Referring to FIG. 5 , the reflector 600 is composed of a circular inner panel 610 in the center and a plurality of outer panels 620 disposed at the edges of the inner panel 610 .

At this time, one of the outer panels 620 is moved in the direction of the other adjacent outer panel 620 to open a part of the outer panel 620 of the plurality of outer panels 620 of the reflector 600. This can reduce wind drag.

Referring to FIG. 6 , an inner guide rail 611 open in the direction of the outer panel 620 is disposed at an edge of the inner panel 610, and an inner guide rail 611 is disposed at an edge of the outer panel 620 facing the inner panel 610. An outer guide rail 621 open in the direction of (610) is disposed. An outer panel 620 is slidably inserted through the open side of each guide rail 611, 621, one of the inserted panels is fixed, and the other panel adjacent to the fixed panel slides toward the fixed panel. can possibly be placed.

At this time, the inner guide rail 611 and the outer guide rail 621 may slide in the direction of the outer panel 620c to which the sliding outer panels 620a and 620b are fixed so as to be overlapped with the rear surface of the fixed outer panel 620c. It is formed to have a larger thickness than the overlapped thickness of each of the outer panels 620a, 620b, and 620c overlapped so as to be overlapped.

On the inner surfaces of the inner guide rail 611 and the outer guide rail 621, the front surface of the reflector 600 can form the same plane as the fixed outer panel 620c when the sliding outer panels 620a and 620b do not slide. A panel elastic body 621a that presses in the direction is disposed.

In the case of the embodiment shown in FIG. 7 , one fixed outer panel 620c and two sliding outer panels 620a and 620b are configured.

In order to effectively describe the embodiment shown in FIG. 7 , the fixed outer panel 620c is referred to as a fixed outer panel 620c, and the outer panel adjacent to the fixed outer panel 620c is referred to as a second sliding panel. The outer panels far from the outer panel 620b and the fixed outer panel 620c are organized into a first sliding outer panel 620a.

First, at both ends of the first sliding outer panel 620a and the second sliding outer panel 620b, when the respective sliding outer panels 620a and 620b are moved, the first sliding outer panel 620a moves to the second sliding outer panel 620b. ) An inclined surface leading to movement to the rear is formed, and an inclined surface is also formed at the corner of the fixed outer panel 620c toward the second sliding outer panel 620b.

As shown in FIG. 7 , the inclined surface is inclined upward to the right so that the first sliding outer panel 620a and the second sliding outer panel 620b can move toward the rear side of the reflector 600 .

A panel moving motor 630 is disposed on the outer guide rail 621 on the side of the first sliding outer panel 620a to move the first sliding outer panel 620a, and the panel moving motor 630 includes a moving gear 631 ) is disposed, and when the panel movement motor 630 is driven, the first sliding outer panel 620a moves to the back side of the second sliding outer panel 620b in a state of being pressed by the panel elastic body 621a. At this time, on the inner surface of the outer guide rail 621 on the side of the second sliding panel 620b, a panel moving motor 630 having a moving gear 631 coupled to a driving shaft is disposed on both sides.

Accordingly, the first sliding panel 620a is moved from (a) of FIG. 7 to (b) of FIG. 7 so that the first sliding panel 620a moves to the second sliding panel 620b as shown in (c) of FIG. ), the first sliding panel 620a moves until it comes into contact with the panel holding protrusion 623 of the second sliding panel 620b. The panel movement motor 630 adjacent to the panel locking protrusion 623 drives the first sliding movement panel 620a and the second sliding movement panel 620b by using the movement gear 631 when it comes into contact with the outer panel. (620c) is moved to the rear. At this time, the height of the moving gear 631 for moving the first sliding panel 620a and the second sliding panel 620b is fixed to the outer panel 620c, the first sliding panel 620a, and the second sliding panel. It is formed corresponding to the thickness of (620b). In addition, as shown in (e) of FIG. 7, the first sliding panel 620a and the second sliding panel 620b are moved to the rear surface of the fixed outer panel 620c and in a stationary state, the first sliding panel 620a And the left end of the second sliding movement panel (620b) can be brought into contact with the movement gear on the right side. Accordingly, the first sliding panel 620a and the second sliding panel 620b are configured to move leftward again.

The moving gear 631, the first sliding panel 620a, and the second sliding panel 620a and the second sliding panel 620a and the second sliding panel 620b are moved by each moving gear 631. Gear teeth meshing with the moving gear 621 are formed at the edges of the first sliding panel 620a and the second sliding panel 620b where the 620b come into contact with each other.

Therefore, the artificial satellite antenna according to this embodiment moves the first sliding panel 620a and the second sliding panel 620b to the rear side of the fixed outer panel 620c when wind is predicted or strong wind blows, thereby reducing drag caused by wind. In addition, signals from artificial satellites can be received using the fixed outer panel 620c.

At this time, the first sliding panel 620a, the second sliding panel 620b, and the fixed outer panel 620c are composed of solid plates, and the first sliding panel 620a, the second sliding panel 620b, A mesh panel 640 composed of a mesh plate may be disposed on the rear surface of the fixed outer panel 620c or the inner guide rail 611 and the outer guide rail 621 toward the rear surface of the reflector 600, as shown in FIG. . In this case, even if the first sliding panel 620a and the second sliding panel 620b move to the rear side of the fixed outer panel 620c, the positions of the first sliding panel 620a and the second sliding panel 620b A signal of an artificial satellite can be effectively received by using the mesh panel 640 and the fixed outer panel 620c disposed thereon.

9, the edge of the reflector 600 (the outer guide rail 621 according to the embodiment) is spaced apart from the edge of the reflector 600, the guide mounting frame member 662 is disposed, the guide mounting frame member A semicircular guide 660 rotatably coupled to the guide seating frame member 662 is disposed between the 662 and the reflector 600, and the upper side edge of the reflector 600 and A protective member 670 may be disposed between the guides 660 . In this case, when the guide 660 moves from the top to the bottom of the reflector 600 as shown in (b) and (c) of FIG. 9 , the protective member 670 covers the front surface of the reflector 600 and The front side and the feeder 700 can be protected.

At this time, the protective member 670 is double formed so as to form a space portion 670a therein, and gas is injected into the space portion 670a of the protection member 670 to form a semicircular shape toward the front surface of the reflector 600. It is formed in a convex shape to reduce the influence of wind blowing to the front of the reflector 600. To this end, as shown in FIG. 6 , a gas injection pipe 672 is connected to the rear surface of the reflector 600 to inject gas into the protective member 670 .

In addition, various gases may be used as the gas injected through the gas injection pipe 672, but in the event of a fire, inert materials such as carbon dioxide and nitrogen are used to prevent damage to the reflector 600 and the feeder 700. Gas may be used.

In order to automatically rotate the guide 660, as shown in FIG. 10, a guide driving motor 664 for rotating the guide 660 may be disposed on the guide mounting frame member 662, and the lower part of the reflector 600 A guide fixing cylinder 666 for fixing the guide 660 moved in the upper direction of the reflector 600 and inserted between the lower edge of the reflector 600 and the guide seating frame member 662 in the direction guide seating frame member 662 Is disposed to prevent the guide 660 from being re-rotated in the upper direction of the reflector 600 by wind.

In the above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to specific embodiments, and should be interpreted according to the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

100: first support 110: first rotation motor
120: first reducer 130: first rotating plate
200: inclined support 200a: inclined support fixing plate
200b: inclined support fixing part 210: inclined surface
300: second support 310: second rotation motor
320: second reducer 330: second rotary plate
400: third support 400a: third support fixing plate
400b: third support fixing part 410: third rotation motor
420: 3rd reducer
500: reflector support member 500a: reflector fixing part
600: reflector 610: inner panel
611: inner guide rail 620, 620a, 620b, 620c: outer panel
621: outer guide rail 621a: panel elastic body
623: panel locking 630: panel moving motor
631: moving gear 640: mesh panel
660: guide 662: guide mounting frame member
664: guide drive motor 666: guide fixing cylinder
670: protection member 672: gas injection pipe
700: feeder 710: feeder support rod
712: lower rod 712a: lower through hole
714: upper rod 714a: upper through hole
716: nut 716a: rod support extension piece
718: screw shaft 718a: screw shaft rotation motor

Claims (5)

A first support fixed to the base;
an inclined supporter having an inclined surface formed on an upper surface thereof and rotatably connected to an upper portion of the first supporter;
a second supporter having a rotating surface formed on the upper surface and fixed to the inclined surface;
a third supporter having embossed rotation shafts rotatable on both sides thereof and fixed to the rotating surface of the second supporter;
a reflector support member coupled to the embossed rotation shaft and rotated according to rotation of the embossed rotation shaft;
a reflector coupled to the reflector support member; and
A feeder coupled to the front surface of the reflector and receiving a signal reflected from the reflector;
The embossed rotation shaft is disposed perpendicular to the rotation surface of the second support,
The inclined support body has one side formed higher than the other side so that the inclined surface on one side is formed lower than the inclined surface on the other side, and the slope between one end and the other end of the inclined surface corresponds to the latitude of the base. A multi-band feeder, characterized in that antenna provided.
According to claim 1,
A feeder support rod is disposed between the feeder and the front surface of the reflector,
The feeder receives multi-band signals,
An antenna with a multi-band feeder, characterized in that the length of the feeder support rod is variable.
According to claim 2,
The feeder support rod is
a lower rod having a lower through-hole formed therein and having an open upper part;
an upper rod inserted through an upper portion of the lower rod, an open lower portion, and an upper through hole formed thereon;
screw shafts disposed inside the lower rod and the upper rod;
When the screw shaft rotates, the nut moves up and down along the screw shaft according to the rotation direction of the screw shaft;
a rod support extension piece protruding from an outer surface of the nut and coupled to an end portion of the upper rod; and
An antenna having a multi-band feeder, characterized in that it comprises a screw shaft rotation motor disposed on the lower rod or lower rod and coupled to the screw shaft to rotate the screw shaft.
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