JPH05160621A - Radome - Google Patents

Abstract

PURPOSE:To suppress rise of temperature in a radome by coating all of the outside surface of the radome main body with a weather-resisting paint and coating all or a partial area of the outside surface of the weather-resisting coating with a static electricity preventing paint in a reticular pattern. CONSTITUTION:All of the outside surface of a radome main body 1 is coated with a white weather-resisting paint 2. All or a partial area of the outside surface of the weather-resisting coating 2 is coated with an almost black static electricity preventing paint 3 in a reticular pattern. As the result, the static electricity preventing coating 3 is dispersed to extend the area of the weather- resisting coating paint 2, and an antenna is protected from weather phenomena such as wind, rain, ice, and snow. Further, rise of temperature in the radome due to absorption of solar radiation in the antistatic coating part 3 is suppressed. Thus, the rise of temperature in the radome is suppressed even when an airplane is in the cloudless sky, and the degradation in performance due to the temperature of the antenna is prevented to keep reception and transmission characteristics satisfactory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radome for protecting an antenna mounted on an aircraft.

[0002]

2. Description of the Related Art FIG. 3 is an external view showing an example of a conventional radome. In the figure, 1 is a radome main body made of a radio wave transmitting material having a curved outer shape, 2 is a weatherproof coating portion provided on the outer surface of the radome main body 3, and 3 is a curved outer surface of the radome main body 1. This is an antistatic coating part formed by coating a conductive material on a region other than the climate resistant coating part 2.

A conventional radome is constructed as shown in FIG. 3, and, for example, when an aircraft flies in the atmosphere, static electricity charged on the radome body 1 is collected in an antistatic coating section 3 whose main component is a conductive material. The radome is prevented from being charged by allowing it to escape to the outer surface of the aircraft made of metal.

However, in the conventional radome shown in FIG. 3, the antistatic coating portion 2 is concentrated in the central area of the radome, and since the antistatic coating portion is of a black type, the aircraft is clear. When placed below, there is a problem that the antistatic coating absorbs solar radiant heat, the temperature inside the radome rises significantly, and the performance of the antenna using electronic components such as semiconductors deteriorates.

Therefore, as a means for solving the above problems, there is one disclosed in Japanese Utility Model Laid-Open No. 1-65506. As shown in FIG. 4, an antistatic coating 3 made of a semiconductor thin film such as germanium is provided on the entire outer surface of a radome body 1 made of a radio wave transmitting material, and the surfaces of the antistatic coating 2 are mutually A part where the anti-static coating part is exposed in order to dispose the weather-resistant coating part 2 that is separated and white-painted, and to dispose a member that electrically connects with the antenna provided inside the radome body 1 A through hole 4 is provided in the.

[0006]

However, in the one disclosed in Japanese Utility Model Laid-Open No. 1-65506, since the antistatic coating is applied to the entire outer surface of the radome,
There is a problem that the electric waves received and transmitted by the antenna are attenuated by the antistatic coating section 2 and the reception and transmission characteristics of the antenna are significantly deteriorated.

The present invention has been made to solve the above-mentioned various problems, and it is possible to suppress the temperature rise in the radome to a small extent even when the aircraft is placed in fine weather, and to suppress the temperature of the antenna. It is an object of the present invention to provide a radome that can prevent deterioration of performance due to the above and can also have good reception and transmission characteristics of an antenna.

[0008]

A radome according to the present invention has a weather resistant coating applied to the entire outer surface of a radome body.
The antistatic paint is applied so as to form a net-like pattern on the entire surface or a part of the outer surface of the weather resistant paint.

[0009]

In the present invention, the weather-resistant paint is applied to the entire outer surface of the radome body, and the antistatic paint is applied to form a net-like pattern on the entire outer surface or part of the area of the weather-resistant paint. Since it is painted, the antistatic coating is dispersed, the area of the climate resistant coating is enlarged, the effect of protecting the antenna from weather phenomena such as wind, rain, ice and snow can be improved, and the radome by absorbing solar radiation heat of the antistatic coating It is possible to suppress the internal temperature rise, and since the antistatic coating is applied in a mesh shape, it is possible to suppress the attenuation of radio waves in the antistatic coating section and to improve the transmission and reception characteristics of the antenna.

[0010]

1 shows the construction of a radome according to an embodiment of the present invention. In the figure, 1 is a radome body, 2 is a weatherproof coating part that is generally white-colored, and 3 is a substantially black antistatic coating part that is coated with a conductive material. In this embodiment, a white weatherproof coating is applied to the entire outer surface of the radome body 1, and an antistatic paint is applied to the entire outer surface of the weatherproof coating in a knitted pattern so as to form a set of hexagonal patterns. It is a thing.

Next, the operation will be described. When an aircraft flies in the atmosphere, static electricity charged on the radome body 1 is collected in the antistatic coating part 3 provided in a knitted pattern and is released to the surface of the aircraft body made of metal to prevent the radome from being charged. .. Further, the climate-resistant coating section 2 reflects radiant heat from the sun when the aircraft is placed in fine weather, etc., and prevents the temperature inside the radome from rising.

FIG. 2 shows the structure of a radome according to another embodiment of the present invention. In the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts. In this embodiment, the radome body 1 When the antistatic paint is applied on the entire outer surface of the woven fabric in a knitted pattern so as to form a set of square patterns, and a plurality of regions surrounded by the antistatic coating part 2 having a quadrangular pattern is subjected to climate resistant coating. About.

According to this embodiment, the weather resistant coating is applied to the entire outer surface of the radome, and the antistatic coating is applied to the entire outer surface of the weather resistant coating in the form of a hexagonal or quadrangular stitch pattern. Therefore, when the aircraft is placed in fine weather, even if the antistatic coating part 2 absorbs the solar radiation heat, the temperature inside the radome does not rise significantly, and the area of the climate-resistant coating part 2 is reduced. Since it can be made larger than the area of the antistatic coating part 3, the solar radiation heat can be sufficiently reflected, and the temperature rise in the radome can be suppressed as small as possible. The deterioration of the performance of the antenna used can be prevented. In addition, since the antistatic coating is applied on the outer surface of the radome body 1 in a mesh shape, it is possible to prevent the radio wave from being attenuated at the antistatic coating section 3, thereby improving the transmission and reception characteristics of the antenna. It can be anything.

In the above embodiment, the antistatic coating section 3 is used.
Although an example in which the above is provided in a knitted pattern consisting of a set of hexagons or squares, the antistatic coating does not necessarily have to be a set of hexagons or squares, and even if it is provided in a knitted pattern on the outer surface of the radome. Any geometrical pattern may be used. However, the finer the mesh pattern of the antistatic coating, the more effective it is, and the area of the climate-resistant coating can be reduced, so that a larger antistatic effect of the radome can be expected.

In the above embodiment, the example in which the outer surface of the radome body 1 is entirely coated with the knitted antistatic coating is shown. However, for example, when it is used for a unidirectional radar or the like, the antistatic coating is used. The coating portion does not have to be provided on the entire outer surface of the radome body, but may be provided in the area of the radome body facing the radar. Even in such a case, the same effect as that of the above-described embodiment can be obtained by applying the antistatic coating in a mesh shape and applying the climate resistant coating to the area other than the antistatic coating portion. In addition, although the climate resistant paint is white in the above-mentioned embodiment, any color such as light gray that does not easily absorb the heat of solar copying may be used, and the same effect as that of the above-mentioned embodiment can be obtained.

[0016]

As described above, according to the present invention, the weather resistant paint is applied to the entire outer surface of the radome body, and the antistatic paint is applied to the entire surface or a part of the area of the weather resistant paint. Since it is painted so as to form a net-like pattern, the antistatic coating is dispersed, the area of the climate resistant coating is enlarged, and the effect of protecting the antenna from weather phenomena such as wind, rain, ice and snow can be improved, and antistatic coating There is an effect that can prevent the temperature rise in the radome due to the absorption of solar radiation heat of the part, and furthermore, since the antistatic coating is applied in a mesh shape, it is possible to prevent the attenuation of radio waves in the antistatic coating part,
This has the effect of improving the transmission and reception characteristics of the antenna.

[Brief description of drawings]

FIG. 1 is an external view of a radome according to an embodiment of the present invention.

FIG. 2 is an external view of a radome according to another embodiment of the present invention.

FIG. 3 is an external view showing a conventional radome.

FIG. 4 is a perspective view and a cross-sectional view of a radome according to another conventional example.

[Explanation of symbols]

 1 Radome body 2 Climate-resistant coating 3 Antistatic coating

[Procedure amendment]

[Submission date] June 17, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

In the above embodiment, the example in which the outer surface of the radome body 1 is entirely coated with the knitted antistatic coating is shown. However, for example, when it is used for a unidirectional radar or the like, the antistatic coating is used. The coating portion does not have to be provided on the entire outer surface of the radome body, but may be provided in the area of the radome body facing the radar. Even in such a case, the same effect as that of the above-described embodiment can be obtained by applying the antistatic coating in a mesh shape and applying the climate resistant coating to the area other than the antistatic coating portion. In the above embodiment, the resistance to weather coating was white, may be any absorbent hardly colors solar radiation heat as light gray, the same effects as the above embodiment.

Claims (2)

[Claims] 1. In a radome for protecting an antenna mounted on an aircraft, a weather-resistant coating applied on the entire outer surface of the radome body, and an entire surface or a partial area on the outer surface of the weather-resistant coating. ,
A radome characterized by having an antistatic coating applied in a stitch pattern. 2. The radome according to claim 1, wherein the weather resistant coating is a white coating.