WO2014094243A1

WO2014094243A1 - High temperature resistant aerial

Info

Publication number: WO2014094243A1
Application number: PCT/CN2012/086877
Authority: WO
Inventors: 俞江; 李鹏图; 杜景中
Original assignee: 深圳市鼎耀科技有限公司
Priority date: 2012-12-18
Filing date: 2012-12-18
Publication date: 2014-06-26
Also published as: CN104205484A; CN104205484B

Abstract

Disclosed is a high temperature resistant aerial, comprising an aerial cover, an aerial body, and a layer of heat insulation material; the aerial cover is made from a high temperature resistant material, and defines an accommodation space; the aerial body is disposed in the accommodation space; the layer of heat insulation material is disposed in the accommodation space, and enwraps the aerial body. The present invention employs a heat resistant and heat insulation double layer technology, can stably and reliably work under an environment of high temperatures of up to hundreds of degrees centigrade, thus satisfying the requirements for electrical and mechanical performance indexes; and the aerial cover thereof employs a structural design conformal with high speed aircraft, thus satisfying the requirement for aerodynamic performance of the high speed aircraft.

Description

High temperature antenna

Technical field

The present invention relates to an antenna, and more particularly to a high temperature resistant antenna.

Background technique

With the rapid development of satellite navigation technology, its application fields continue to expand to include surveying and mapping, telecommunications In many fields such as transportation, water conservancy, marine fishery and geological exploration, it plays a huge role in national defense and modernization warfare. High-precision moving target positioning and precision-guided missiles generally use satellite navigation systems, and missile-borne satellite navigation antennas In addition to electrical performance, it also meets the requirements of special missile-loaded environmental performance. These special requirements include co-operating with the projectile to meet the aerodynamic performance requirements of the projectile, high-intensity vibration and high-temperature performance requirements. Because the high temperature generated by the strong friction between the projectile and the atmosphere can reach several hundred degrees Celsius, the ordinary antenna is difficult to work normally or even completely damaged at such high temperature, which requires designing a special structure antenna, which can be reliably and stably in this high temperature environment. jobs.

Summary of the invention

The technical problem to be solved by the present invention is to provide a high temperature resistant antenna capable of stable and reliable operation in a high temperature environment of up to several hundred degrees Celsius for meeting the defects of the existing related art, and meeting the requirements of electrical performance indexes and mechanical performance indexes. .

The technical solution adopted by the present invention to solve the technical problem thereof is to provide a high temperature resistant antenna, comprising a radome, an antenna body and a heat insulating material layer; the radome is made of a high temperature protective material and defines an accommodating space The antenna body is disposed in the In the accommodating space, the heat insulating material layer is disposed in the accommodating space and wraps the antenna body.

The high temperature protective material is a polyimide or glass fiber composite material.

The radome includes an upper cover and a lower cover, and the upper cover and the lower cover are coupled to each other to form the radome having the accommodating space therein; the antenna body is fixedly connected between the upper and lower covers And disposed in the accommodating space; the antenna body includes a PCB board (printed circuit board), a microstrip antenna disposed on the PCB board, and a support board, wherein the antenna body is fixedly connected to the upper and lower covers through the support board.

The support plate is fixedly connected to the upper and lower covers by a fastener, and the support plate is provided with a mounting hole, and the upper and lower covers are respectively provided with connecting holes that communicate with the mounting hole, a fastener is passed through the connecting hole and the mounting hole, and the support plate is fixedly connected between the upper and lower covers; the inner circumference of the mounting hole is insulated from the fastener Insulation washers.

The fastener passes through the connection hole of the lower cover, the mounting hole of the support plate and the connection hole of the upper cover from bottom to top, and the lower cover, the support plate and the upper portion The cover is fixedly connected, and the fastener is filled with an insulating sealant between the end of the upper cover connecting hole and the upper cover connecting hole.

The heat insulating material layer includes an aerogel layer, which is filled between the antenna body and the upper and lower covers, respectively forming a first aerogel between the antenna body and the upper cover a layer, and a second aerogel layer between the antenna body and the lower cover.

The layer of insulating material further includes a layer of quartz glass fiber cloth disposed between the first aerogel layer and the upper cover.

The high temperature resistant antenna is a high temperature resistant satellite navigation antenna for a high speed aircraft, the radome being conformal to the high speed aircraft.

Also included is a radio frequency connector disposed on the radome, the radio frequency connector being coupled to the antenna body via a radio frequency cable.

The radio frequency connector is disposed on a lower cover of the radome, and the lower cover is provided with a cable hole corresponding to the radio frequency cable, and one end of the radio frequency cable is connected to the radio frequency connector, and the other end passes through the cable hole and The antenna of the antenna body Board connection.

The invention makes the antenna by adopting thermal protection and thermal isolation double layer technology It can work stably and reliably in high temperature environment up to several hundred degrees Celsius, meet the requirements of electrical performance index and mechanical performance index. In addition, the radome can meet the aerodynamic performance requirements of high-speed aircraft by adopting a structural design conforming to a high-speed aircraft such as a missile projectile.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic view showing the bottom structure of the high temperature resistant antenna of the present invention;

Figure 2 is a rear view of the high temperature resistant antenna shown in Figure 1;

Figure 3 is a left side view of the high temperature resistant antenna shown in Figure 1;

4 is a schematic cross-sectional structural view of a high temperature resistant antenna of the present invention;

Figure 5 is a cross-sectional structural view of the antenna body of the high temperature resistant antenna shown in Figure 4;

Fig. 6 is a schematic view showing the bottom structure of the antenna main body of the high temperature resistant antenna of the present invention.

detailed description

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 4, the high temperature resistant antenna of the present invention is a satellite navigation antenna mountable on a high speed aircraft such as a missile, and includes a radome 1, an antenna main body 2, and a heat insulating material layer. . The radome 1 is made of a high temperature protective material and defines an accommodating space. The antenna body 2 is disposed in the accommodating space of the radome 1, and the heat insulating material layer 3 is disposed in the accommodating space and wraps the antenna body 2 . The radome 1 made of high temperature protective material is combined with the heat insulating material layer 3 to impart high temperature resistance to the antenna, so that it can work stably and reliably in a high temperature environment of up to several hundred degrees Celsius, meeting all electrical performance index requirements and mechanical properties. Indicator requirements.

As shown in FIG. 4, the radome 1 includes an upper cover 11 and a lower cover 12, and the antenna main body 2 is fixedly coupled between the upper cover 11 and the lower cover 12. The upper cover 11 and the lower cover 12 are connected up and down by the arrangement of the two edges thereof to form a radome 1 having an accommodating space therein, and the antenna body 2 Sealed in the accommodating space of the radome 1. The upper cover 11 and the lower cover 12 may be integrally formed, or may be fastened by a fastener 5. The internal dimensions of the radome 1 are set according to the size of the antenna body and the mounting requirements.

In order to meet the high temperature protection performance of the radome 1, the radome 1 needs to meet at least the following four requirements: 1. It must withstand a temperature environment of up to several hundred degrees Celsius, has good thermal shock resistance, and maintain sufficient mechanical strength at this high temperature. And appropriate elastic modulus; 2, with excellent electrical properties, the material's wave transmission performance is good, that is, the reflection and transmission loss of electromagnetic waves is small, which requires the dielectric constant and dielectric loss tangent of the material Small; 3, with good weather resistance, can withstand the natural environmental conditions such as solar radiation, rain erosion; 4, the material has good machinability, can be processed using lathes, milling machines and other high-speed aircraft such as missiles Conformal shape. Therefore, the radome 1 can be made of a polyimide or glass fiber composite material, but is not limited thereto. In the present embodiment, the radome 1 is preferably a polyimide material which has characteristics of high temperature resistance, good electrical properties, and mechanical processing properties.

By selecting the material of the radome 1, the antenna body 2 can be operated in a low temperature environment, and can withstand high-intensity shock vibrations up to 400. The temperature environment of °C can work stably and reliably, and the electrical performance indicators meet the requirements. The radome 1 can meet the aerodynamic performance of the projectile by adopting a structural design conforming to a high-speed aircraft such as a missile projectile. Figure 2 As shown in FIG. 3, in the present embodiment, the top surface of the upper cover 11 of the radome 1 is designed in an arc shape, and the height of the top surface is decreased from one side to the opposite side.

As shown in FIG. 4 and FIG. 5, the antenna main body 2 includes a PCB board 21 and is disposed on the PCB. The microstrip antenna 22 and the support plate 23 on the board 21, and the microstrip antenna 22 can be fastened or soldered to the PCB board 21 by a connector 7 such as a screw. The microstrip antenna 22 can operate on GPS L1, GLONASS L1, Beidou II B1, Beidou II B3 The four frequency bands, which can simultaneously receive the signals of the four frequencies of the three satellite navigation systems, enable the antenna to operate at multiple frequencies. It can be understood that the operating frequency band of the microstrip antenna 22 is not limited to this.

The PCB board 21 can be connected to the support board 23 by screws or the like. The support plate 23 is made of a polyimide material, and the antenna body 2 The support plate 23 is fixedly connected to the upper cover 11 and the lower cover 12, and the radome 1 is isolated by the support plate 23 to conduct heat inward to prevent the antenna body 2 from being affected. Support plate 23 through fasteners 5 It is fixedly connected to the upper and

lower covers

11 and 12, and the fastener 5 can be a bolt. Referring to Figures 4 to 6, wherein a mounting hole 230, an upper cover 11 and a lower cover 12 are provided on the periphery of the support plate 23. Correspondingly, connecting

holes

110 and 120 are formed in communication with the mounting holes 230, and the support plate 23 is passed through the connecting

holes

110, 120 and the mounting holes 230 through the fasteners. It is fixedly connected between the upper and

lower covers

11 and 12. An insulating and insulating gasket 24 is also interposed between the inner circumference of the mounting hole 230 and the fastener 5 for isolating heat conduction from the fastener 5.

In the present embodiment, the fastener 5 passes through the connecting hole 120 of the lower cover 12 and the mounting hole of the support plate 23 in order from bottom to top. The lower cover 12, the support plate 23, and the upper cover 11 are fixedly connected to the connection hole 110 of the upper cover 11. Further, the fastener 5 is at the end of the upper cover 11 connecting hole 110 and the upper cover 11 The connection holes 110 are filled with an insulating sealant 6 . It can be seen from the above that the heat is further insulated from the radome by the arrangement of the insulating and heat insulating gasket 24 and the heat insulating sealant 6 Internal conduction, more advantageously, provides a lower temperature working environment for the antenna body 2.

As shown in FIG. 4, the heat insulating material layer 3 is disposed between the antenna main body 2 and the inner wall surface of the accommodating space of the radome 1, and a heat insulating material layer is provided. The purpose is to isolate the high temperature outside the radome 1 to protect the antenna body 2 from operating in a lower temperature environment, taking into account the large temperature difference from the high temperature outside the radome 1 to the low temperature inside it and the radome 1 The smaller the accommodating space, the material of the insulating material layer must meet the following requirements: 1. Realize nearly 400 °C temperature difference temperature effect; 2, low dielectric constant, preferably close to the dielectric constant of air to reduce the impact on the electrical performance of the antenna; 3, can maintain structural mechanical properties at high temperatures; 4, a smaller proportion To reduce weight and greater softness to better fill the radome housing space.

In the present embodiment, the heat insulating material layer 3 includes an aerogel layer 31 which is respectively filled in the antenna main body 2 and the upper and lower covers 11 and 12 A first aerogel layer 311 between the antenna main body 2 and the upper cover 11 and a second aerogel layer 312 between the antenna main body 2 and the lower cover 12 are formed, respectively. The aerogel layer 31 It is formed by a new nanomaterial aerogel, which has the characteristics of high temperature resistance, light weight, low loss and low dielectric constant, which can meet the above requirements.

As shown in FIG. 4, the heat insulating material layer 3 further includes a quartz glass fiber cloth layer 32 which is disposed on the first aerogel layer 311 and the upper cover 11 Between the quartz glass fiber layers 32 is woven from low density quartz glass fibers. The quartz glass fiber cloth layer 32 can be 1-3 layers or 3 The layer is superimposed above, preferably two layers are superimposed. By using the aerogel layer 31 in combination with the quartz glass fiber cloth layer 32, the purpose of isolating the high temperature outside the radome 1 is achieved.

As shown in FIG. 1 to FIG. 4, the high temperature resistant antenna of the present invention further includes an RF connector 4 disposed on the radome 1 and the RF connector 4 It is provided on the lower cover 12 of the radome 1 and is connected to the antenna main body 2 via the radio frequency cable 41. The RF connector 4 and the lower cover 12 can be fastened by screws or the like. Where the lower cover 12 corresponds to the RF cable 41 has a cable hole 121, the cable hole 121 penetrates into the inside of the radome 1, one end of the RF cable 41 is connected with the RF connector 4, and the other end passes through the cable hole 121 and the antenna body 2 The PCB board 21 is connected. In this embodiment, the RF connector 4 is laterally mounted on the lower cover 12, and the RF cable 41 is placed in the cable hole 121, one end of which is connected to the RF connector 4 Connect the other end to the inside of the radome 1 and connect it to the PCB board 21.

The above description is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments, and all the technical solutions under the inventive concept belong to the protection scope of the present invention. It should be noted that those skilled in the art will be able to devise a number of modifications and refinements without departing from the principles of the invention.

Claims

A high temperature resistant antenna, comprising: a radome (1), an antenna body (2), and a heat insulating material layer (3); the radome (1) a high-temperature protection material, and defining an accommodating space; the antenna body (2) is disposed in the accommodating space, and the heat insulating material layer (3) is disposed in the accommodating space Wrapping the antenna body ( 2 ) .
The high temperature resistant antenna according to claim 1, wherein the high temperature protection material is a polyimide or glass fiber composite material. .
The high temperature resistant antenna according to claim 1, characterized in that the radome (1) comprises an upper cover (11) and a lower cover (12), the upper cover ( 11) is connected to the lower cover (12) to form the radome (1) having the accommodating space therein; the antenna body (2) is fixedly connected to the upper and lower covers (11, 12) Between the accommodating spaces; the antenna body (2) includes a PCB board (21), a microstrip antenna (22) disposed on the PCB board (21), and a support board (23) The antenna body (2) is fixedly connected to the upper and lower covers (11, 12) through the support plate (23).
The high temperature resistant antenna according to claim 3, wherein the support plate (23) passes through the fastener (5) and the upper and lower covers (11, 12) a fixed connection, the support plate (23) is provided with a mounting hole (230), and the upper and lower covers (11, 12) are respectively provided with connecting holes (110) communicating with the mounting hole (230). 120), the fastener (5) passes through the connecting hole (110, 120) and the mounting hole (230), and the support plate (23) is fixedly connected to the upper and lower covers ( 11 Between 12 and 12; an insulating and insulating gasket (24) is disposed between the inner circumference of the mounting hole (230) and the fastener (5).
The high temperature resistant antenna according to claim 4, wherein the fastener (5) sequentially passes through the connecting hole of the lower cover (12) from bottom to top (120) a mounting hole (230) of the support plate (23) and a connecting hole (110) of the upper cover (11), the lower cover (12), the support plate (23) And the upper cover (11) is fixedly connected, and the end of the fastener (5) in the upper cover (11) connecting hole (110) and the upper cover (11) connecting hole (110) ) is filled with an insulating sealant (6).
According to claims 1-5 The high temperature resistant antenna according to any one of the preceding claims, wherein the heat insulating material layer (3) comprises an aerogel layer (31) filled in the antenna body (2) and the upper and lower covers (11, 12) forming a first aerogel layer (311) between the antenna body (2) and the upper cover (11), and the antenna body (2) and the lower cover respectively (12 ) between the second aerogel layer (312).
The high temperature resistant antenna according to claim 6, wherein the heat insulating material layer (3) further comprises a quartz glass fiber cloth layer (32) ), disposed between the first aerogel layer (311) and the upper cover (11).
The high temperature resistant antenna according to any one of claims 1 to 5, wherein the high temperature resistant antenna is a high temperature resistant satellite navigation antenna for a high speed aircraft, and the radome (1) ) conformal to the high speed aircraft.
The high temperature resistant antenna according to any one of claims 1 to 5, further comprising a radio frequency connector provided on the radome (1) The RF connector (4) is connected to the antenna body (2) via a radio frequency cable (41).
The high temperature resistant antenna according to claim 9, wherein the radio frequency connector (4) is disposed on a lower cover of the radome (1) (12) The lower cover (12) is provided with a cable hole (121) corresponding to the radio frequency cable (41), and one end of the radio frequency cable (41) and the radio frequency connector (4) The other end is connected to the PCB board (21) of the antenna body (2) through the cable hole (121).