JP6797143B2 - Antenna power supply device - Google Patents

Description

The present invention relates to an antenna feeding device for improving exhaust heat characteristics.

In future high-speed satellite communication, improvement of satellite communication performance will be required as terrestrial-satellite traffic increases. As one measure for improving the communication performance of the satellite, there is a method of making the antenna beam multi-beam. In such a method of multi-beaming an antenna beam, a large number of beams are arranged, the coverage area of the beams is reduced, and the shape of the antenna pattern is steep, thereby increasing the antenna gain and improving the communication performance. ing.

For example, in order to realize high density of multi-beam, it is necessary to arrange the primary radiators mounted on the satellite at high density. As a result of the high density placement of the primary radiators, heat is trapped, especially in the central part where the primary radiators are densely packed. Therefore, in order to realize high density of multi-beam, it is necessary to consider the exhaust heat characteristics.

There is a prior art technique in which heat generated from a primary radiator is exhausted by forcibly cooling using a heat pipe or the like (see, for example, Patent Document 1). In Patent Document 1, the heat generated by the amplification element array in which the microwave amplification elements are two-dimensionally arranged is exhausted by a plurality of heat pipes.

The plurality of heat pipes in Patent Document 1 extend from the outside to the center position of the amplification element array on a plane in which the microwave amplification element is two-dimensionally arranged. As a result, a heat pipe having an optimum operating temperature and heat transport capacity can be selected according to the heat generation distribution in the long axis direction of the microwave amplification element, and the cooling unit can be arranged outside the amplification element array, resulting in efficiency. Enables heat transport.

Japanese Unexamined Patent Publication No. 2006-042125

However, the prior art has the following problems.
It is often physically difficult to crawl a heat pipe in a limited space arranged at high density, and it is a problem to provide an appropriate heat exhaust path. In Patent Document 1, efficient heat transport is possible by appropriately selecting a heat pipe. However, Patent Document 1 does not disclose or suggest a high-density arrangement method of the antenna feeding device for improving the exhaust heat performance.

As described above, in order to realize the high density of the multi-beam, it is necessary to arrange the primary radiators mounted on the satellite at a high density, and in particular, heat is trapped in the central part where the primary radiators are densely packed. However, it is often difficult to crawl the heat pipe in a limited mounting space. Therefore, it is an important issue to improve the heat exhaust characteristics by devising a method of arranging the antenna feeding device having a high-density arrangement.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an antenna feeding device that realizes a high-density arrangement of primary radiators while improving exhaust heat characteristics. ..

The antenna feeding device according to the present invention includes a plurality of primary radiators configured in an array and a base plate that contacts the throat portions of the plurality of primary radiators and supports the throat portions, and is provided with the plurality of primary radiators. In each case, the openings of the plurality of primary radiators that transmit and receive electromagnetic waves are arranged at an angle facing the center of the main reflectors arranged opposite to each other, and the ends of the adjacent openings are arranged with each other. in in contact Rukoto, supported on the base plate, in which are arranged so that the distance of the end portions of the adjacent throat away.

The antenna feeding device according to the present invention has a configuration in which the openings of the primary radiator of the multi-beam satellite are densely packed and the throat portions of the primary radiator are arranged apart from each other. As a result, it is possible to obtain an antenna feeding device that realizes a high-density arrangement of primary radiators while improving the exhaust heat characteristics.

It is explanatory drawing which shows the structure of the antenna feeding apparatus according to Embodiment 1 of this invention. It is a figure which showed the 1st configuration example which applied the heat pipe for exhaust heat to the antenna feeding apparatus by Embodiment 1 of this invention. It is a figure which showed the 2nd configuration example which applied the heat pipe for exhaust heat to the antenna feeding apparatus by Embodiment 1 of this invention. It is a figure which showed the configuration example which applied the exhaust heat sheet to the antenna feeding device according to Embodiment 1 of this invention.

Hereinafter, embodiments of the antenna feeding device of the present invention will be described with reference to the drawings.

Embodiment 1.
FIG. 1 is an explanatory diagram showing a configuration of an antenna feeding device according to a first embodiment of the present invention. The main reflector 10 is shown on the left side in FIG. A plurality of primary radiators 20 are arranged at positions facing the main reflector 10. That is, a plurality of primary radiators 20 are arranged side by side to form an array.

Each primary radiator 20 is configured to have an opening 21 and a throat portion 22. The opening 21 faces the central direction of the main reflector 10. The primary radiator 20 corresponding to a horn antenna is configured as, for example, an array antenna in which a plurality of antenna elements having an inverted frustum-shaped horn are arranged so that the antenna opening surface has a high density. The primary radiator 20 transmits and receives electromagnetic waves.

The base plate 30 supports a plurality of primary radiators 20 that are densely arrayed. Further, the base plate 30 functions as a structure for discharging the heat generated by the plurality of primary radiators 20 via the throat portions 22 of the primary radiators 20. As shown in FIG. 1, the base plate 30 is in contact with each throat portion 22 of the plurality of primary radiators 20.

The heat generated by the primary radiator 20 is exhausted by radiation from the base plate 30 via the throat portion 22. Therefore, the exhaust heat area can be increased by arranging the throat portions 22 of the plurality of primary radiators 20 as far apart as possible.

On the other hand, if the throat portions 22 are arranged apart from each other, the openings of the primary radiator 20 may be arranged apart from each other. Further, if the throat portions 22 are arranged apart from each other, the opening 21 does not face toward the center of the main reflector 10, and the amount of electromagnetic waves reflected by the main reflector 10 may decrease, resulting in a large “spillover”. There is.

Therefore, the plurality of primary radiators 20 according to the first embodiment shown in FIG. 1 are arranged at an angle such that their respective openings 21 face the central direction of the main reflector 10. Each primary radiator 20 is individually tilted so as to face the central direction of the main reflector 10, and the ends of adjacent openings 21 are in contact with each other.

As a result, the openings 21 of the plurality of primary radiators 20 are arranged at high density and face the central direction of the main reflector 10. On the other hand, the throat portions 22 of the primary radiator 20 supported by the base plate 30 are arranged apart from each other, and the throat portions of the primary radiator 20 arranged in the central portion are located deeper than the base plate 30. It will be in the inserted state.

In other words, each of the plurality of primary radiators according to the first embodiment shown in FIG. 1 is arranged as follows.
Each opening 21 of the plurality of primary radiators 20 that transmit and receive electromagnetic waves is arranged at an angle facing the center of the main reflectors 10 arranged so as to face each other.
The distance L between the ends of the adjacent throat portions 22 supported by the base plate 30 is arranged so as to be separated from the distance between the ends of the throat portions 22 when the two primary radiators 20 are arranged adjacent to each other in parallel. ing.
Each throat portion 22 is in contact with the base plate 30 with a larger contact surface of the primary radiator 20 arranged in the central portion than the primary radiator 20 arranged at both ends.

Therefore, for each of the throat portions 22, a large heat exhaust area of the base plate 30, which is a heat exhaust destination, can be secured as compared with the case where the throat portions 22 are arranged without being separated from each other.

Here, regarding the arrangement structure of the high density of the openings 21 of the plurality of primary radiators 20 toward the center of the main reflector 10 and the sparse density of the throat portions 22, the beam arrangement to irradiate the ground is required. Optimal design of the arrangement position, tilt angle, etc. of each primary radiator 20 is required according to the antenna performance and the like.

The heat released from the primary radiator 20 to the base plate 30 via the throat portion 22 can be further exhausted from the base plate 30 to different structures. FIG. 2 is a diagram showing a first configuration example in which a heat pipe 40 for exhaust heat is applied to the antenna feeding device according to the first embodiment of the present invention. In the first embodiment, by having the configuration described with reference to FIG. 1, the throat portions 22 can be arranged in the base plate 30 so as to be separated from each other.

Therefore, in the configuration of FIG. 2, the heat exhaust effect is improved by arranging the heat pipe 40 whose pipe axis extends in the direction perpendicular to the paper surface between the adjacent throat portions 22. That is, the heat released to the base plate 30 is exhausted from the inner wall of the heat pipe 40. In this way, a larger exhaust heat area can be secured.

FIG. 3 is a diagram showing a second configuration example in which a heat pipe 40 for exhaust heat is applied to the antenna feeding device according to the first embodiment of the present invention. In FIG. 2 above, a plurality of heat pipes 40 arranged between the adjacent throat portions 22 are arranged in a straight line. On the other hand, in FIG. 3, a plurality of heat pipes 40 are arranged between the ends of the adjacent throat portions 22. Even with such an arrangement, the heat exhaust effect can be improved. That is, the heat propagated to the end of the throat portion 22 can be efficiently exhausted from the heat pipe 40.

Note that FIGS. 2 and 3 are merely examples, and it is possible to appropriately design the size and arrangement of the respective heat pipes 40 according to the arrangement and number of the plurality of primary radiators 20. That is, in the first embodiment, since the throat portions 22 are arranged so as to be separated from each other, the degree of freedom in layout design of the heat pipe 40 can be improved.

Further, FIG. 4 is a diagram showing a configuration example in which the heat exhaust sheet 50 is applied to the antenna power feeding device according to the first embodiment of the present invention. In FIG. 4, in order to enhance the heat exhaust effect, the heat exhaust sheet 50 is attached to the surface of the base plate 30 opposite to the surface on which the plurality of primary radiators 20 are arranged. Even with such a configuration, the heat exhaust effect can be improved. The attachment position of the heat exhaust sheet 50 and the size of the heat exhaust sheet 50 are not limited to the configuration example shown in FIG. 4, and can be appropriately designed according to the specifications of the antenna power feeding device. ..

Further, by using the heat pipe 40 and the heat exhaust sheet 50 together, the heat exhaust effect can be further improved.

The base plates 30 shown in FIGS. 1 to 4 all have a rectangular parallelepiped shape. However, the shape of the base plate 30 is not limited to the rectangular parallelepiped shape, and may be a curved shape or an inclined shape depending on the arrangement of the primary radiator 20 and the arrangement of the heat pipe.

Also, the primary radiator 20 is usually connected to a waveguide. Therefore, the base plate 30 can be configured to have the function of a waveguide.

As described above, according to the first embodiment, the openings of the primary radiators of the multi-beam satellite are densely packed at a high density, and the throat portions of the primary radiators are arranged apart from each other. As a result, it is possible to realize an antenna feeding device that realizes a high-density arrangement of primary radiators while improving the exhaust heat characteristics.

10 main reflector, 20 primary radiator, 21 primary radiator opening, 22 primary radiator throat, 30 base plate, 40 heat pipe, 50 heat exhaust sheet.

Claims (3)

With multiple primary radiators configured in an array,
A base plate that contacts each throat portion of the plurality of primary radiators and supports the throat portion is provided.
In each of the plurality of primary radiators, the openings of the plurality of primary radiators that transmit and receive electromagnetic waves are arranged at an angle facing the center of the main reflectors arranged opposite to each other, and the openings are adjacent to each other. in Rukoto ends parts are in contact with each other, said supported on the base plate, are arranged so that the distance of the end portions of the adjacent throat leaves
Antenna feeding device. The antenna feeding device according to claim 1, further comprising a heat pipe arranged in the base plate and exhausting heat released from each throat portion to the base plate. The antenna power feeding device according to claim 1 or 2, further comprising a heat radiating sheet attached to the base plate and exhausting heat released from each throat portion to the base plate.

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