阅读说明：本技术 一种直升机超短波共形天线 (Helicopter ultrashort wave conformal antenna ) 是由 卢攀 魏宁强 于汶涛 史智慧 淡宁刚 沙永胜 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种直升机超短波共形天线,包括前缘罩天线辐射体和后缘罩天线辐射体,前缘罩天线辐射体通过电缆与后缘罩天线辐射体连接,后缘罩天线辐射体包括辐射体与阻抗匹配盒,阻抗匹配盒包括壳体,壳体内设置有匹配网络,壳体的上端口固定有盖板,壳体的一侧固定有TNC型连接器,匹配网络包括印制板,印制板上设置有第一电容、第一电感、第二电感和第二电容,印制板上设置有输出端和输入端,输出端与后缘罩天线辐射体通过小截面线焊接,输入端依次串联第一电容、并联第一电感、串联第二电感、第二电容。该发明的有益效果为减少机体外伸天线数量,使机载天线布局更加合理和改善通信效果。(The invention discloses an ultrashort wave conformal antenna of a helicopter, which comprises a front edge cover antenna radiator and a rear edge cover antenna radiator, wherein the front edge cover antenna radiator is connected with the rear edge cover antenna radiator through a cable, the rear edge cover antenna radiator comprises a radiator body and an impedance matching box, the impedance matching box comprises a shell, a matching network is arranged in the shell, a cover plate is fixed at the upper port of the shell, a TNC type connector is fixed at one side of the shell, the matching network comprises a printed board, a first capacitor, a first inductor, a second inductor and a second capacitor are arranged on the printed board, an output end and an input end are arranged on the printed board, the output end and the rear edge cover antenna radiator are welded through a small-section line, and the input end is sequentially connected with the first capacitor in series, the first inductor in parallel, the second inductor in. The invention has the advantages of reducing the number of the extended antennas of the machine body, ensuring the layout of the airborne antenna to be more reasonable and improving the communication effect.)

1. A conformal antenna of helicopter ultrashort wave which characterized in that: the antenna comprises a front edge cover antenna radiator (1) and a rear edge cover antenna radiator (2), wherein the front edge cover antenna radiator (1) is connected with the rear edge cover antenna radiator (2) through a cable (3), the rear edge cover antenna radiator (2) comprises a radiator (4) and an impedance matching box (5), the impedance matching box (5) comprises a shell (7), a matching network (6) is arranged in the shell (7), a cover plate (8) is fixed on an upper port of the shell (7), a TNC type connector (16) is fixed on one side of the shell (7), the matching network (6) comprises a printed board (17), a first capacitor (18), a first inductor (19), a second inductor (20) and a second capacitor (21) are arranged on the printed board (17), an output end (22) and an input end (23) are arranged on the printed board (17), the output end (22) and the rear edge cover antenna radiator (2) are welded through a small-section line, and the input end (23) is sequentially connected with the first capacitor 18, the first inductor 19 in parallel, the second inductor 20 in series and the second capacitor 21 in series.

2. A helicopter ultrashort wave conformal antenna according to claim 1, wherein the impedance matching box (5) is made of aluminum alloy material with low corrosion resistance density.

3. A helicopter ultrashort wave conformal antenna according to claim 1, characterized in that the impedance matching box (5) and the radiator (4) are connected by a bushing.

4. Helicopter ultrashort wave conformal antenna according to claim 1, characterized in that a sealing gasket (9) is provided between the upper port of the housing (7) and the cover plate (8).

5. A helicopter ultrashort wave conformal antenna according to claim 1, wherein the cover plate (8) is fixedly connected with the housing (7) by a first screw (10), a first flat washer (12), a first spring washer (14).

6. A helicopter ultrashort wave conformal antenna according to claim 1, wherein the TNC type connector (16) is fixedly connected with the housing (7) by a second screw (11), a second flat washer (13) and a second spring washer (15).

7. A helicopter ultrashort wave conformal antenna according to claim 1, wherein the first capacitance (18) is 43pF, the first inductance (19) is 0.73 uH, the second inductance (20) is 0.36 uH, and the second capacitance (21) is 6 pF.

Technical Field

The invention relates to the technical field of antennas, in particular to an ultrashort wave conformal antenna of a helicopter.

Background

Active helicopter 30MHz ~ 400MHz ultrashort wave antenna is sword shape or whip antenna, installs in aircraft back, belly or vertical tail course left side more, for protruding type monomer antenna, and the protruding antenna of organism platform is more simultaneously, and antenna layout difficulty needs to develop novel conformal antenna to reduce the overhanging antenna quantity of organism, it is more reasonable to make airborne antenna layout, reduces the mutual influence between the antenna, so the present urgent need develop novel antenna in order to improve tactics communication effect.

Disclosure of Invention

The invention provides a helicopter ultrashort wave conformal antenna which can achieve the effect provided in the background technology.

The invention provides an ultrashort wave conformal antenna of a helicopter, which comprises a front edge cover antenna radiator and a rear edge cover antenna radiator, the front edge cover antenna radiator is connected with the rear edge cover antenna radiator through a cable, the rear edge cover antenna radiator comprises a radiator and an impedance matching box, the impedance matching box comprises a shell, a matching network is arranged in the shell, a cover plate is fixed at the upper port of the shell, a TNC type connector is fixed on one side of the shell, the matching network comprises a printed board, a first capacitor, a first inductor, a second inductor and a second capacitor are arranged on the printed board, the printed board is provided with an output end and an input end, the output end is welded with the antenna radiator of the rear edge cover through a small-section line, the input end is sequentially connected with a first capacitor, a parallel first inductor, a series second inductor and a second capacitor in series.

Preferably, the impedance matching box is made of an aluminum alloy material with low corrosion resistance density.

Preferably, the impedance matching box and the radiator are connected by a bushing.

Preferably, a sealing gasket is arranged between the upper port of the housing and the cover plate.

Preferably, the cover plate is fixedly connected with the housing through a first screw, a first flat washer and a first spring washer.

Preferably, the TNC-type connector is fixedly connected to the housing by a second screw, a second flat washer, and a second spring washer.

Preferably, the first capacitor is 43pF, the first inductance is 0.73 uH, the second inductance is 0.36 uH, and the second capacitor is 6 pF.

The invention provides an ultrashort wave conformal antenna of a helicopter, which consists of a front edge cover antenna radiator, a rear edge cover antenna radiator and an impedance matching box, wherein the front edge cover antenna radiator and the rear edge cover antenna radiator are connected through a cable, and the impedance matching principle is applied.

The method of the antenna is that the impedance matching box is installed on the antenna radiator of the rear edge cover, and the antenna adopts lossless matching network loading, so that the impedance characteristic of the antenna is improved, and the impedance characteristic of the full frequency band tends to be smooth; the reactance component is reduced, the resistance component is increased, the bandwidth of the antenna is widened, the miniaturization of the antenna is realized, the loaded antenna not only has good matching broadband and radiation characteristics, but also increases the effective path of current, and the overall size of the antenna is greatly reduced; based on the principle, the invention has the beneficial effects that: the front edge cover antenna radiator and the rear edge cover antenna radiator are connected through a cable, a middle feeding mode is adopted, and an impedance matching network is designed by utilizing an Advanced Design System 2009. The device with good linear characteristic and high power resistance capacity is selected to solve the problems of impedance matching, noise interference, power capacity, linearity of frequency response and the like in the working frequency band range, and index requirements in the working frequency band range are realized. The whole antenna comprises: the conformal antenna radiator in the application is further deformation of a rectangular dipole antenna, a smoother gain curve and good impedance bandwidth are obtained by adjusting the length-width ratio of a rectangular dipole, and meanwhile, the upper dipole of the dipole is folded and extended to cover the other edge of the tail wing, so that the radiation efficiency in the other edge direction can be obviously improved. On the other hand, lumped parameter loading is carried out on the antenna, so that the impedance characteristic of the full frequency band tends to be smooth, and the broadband of the antenna is further realized. The front edge cover antenna radiator and the rear edge cover antenna radiator are used as antenna radiator components, an impedance matching box is installed on the rear edge cover antenna radiator, then the rear edge cover antenna radiator and the rear edge cover antenna radiator are electrically overlapped and fed, the radiators are laid inside the composite material and are conformal with the cover, and the electrically overlapped and fed parts can be fixed through screwing, so that the maintenance and the adaptability are facilitated, the reliability is improved, and the influence of the welding on the strength of the front cover and the rear cover is avoided. The materials of the bushing, the pillar and the matching box are selected and coated, so that the environmental adaptability is improved.

Drawings

Fig. 1 is a schematic structural diagram of an ultrashort wave conformal antenna of a helicopter provided by the invention.

Fig. 2 is a schematic diagram of a structure of a trailing edge cover antenna radiator of the ultra-short wave conformal antenna of the helicopter provided by the invention.

Fig. 3 is a schematic structural diagram of an impedance matching box of the ultra-short wave conformal antenna of the helicopter provided by the invention.

Fig. 4 is a schematic structural diagram of an impedance matching box of the ultra-short wave conformal antenna of the helicopter provided by the invention.

3 fig. 3 5 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 at 3 a 3- 3 a 3 in 3 fig. 3 3 3. 3

Fig. 6 is a schematic diagram of a matching circuit of the ultra-short wave conformal antenna of the helicopter provided by the invention.

Description of reference numerals: 1-leading edge cover antenna radiator; 2-a trailing edge shield antenna radiator; 3-a cable; 4-a radiator; 5-impedance matching box; 6-matching network; 7-a housing; 8-cover plate; 9-a sealing gasket; 10-a first screw; 11-a second screw; 12-a first flat gasket; 13-a second flat gasket; 14-a first spring washer; 15-a second spring washer; a 16-TNC type connector; 17-a printed board; 18-a first capacitance; 19-a first inductance; 20-a second inductance; 21-a second capacitance; 22-an output terminal; 23-input terminal.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

As shown in fig. 1 to 6, an ultrashort wave conformal antenna for a helicopter provided by an embodiment of the present invention includes a front edge cover antenna radiator 1 and a rear edge cover antenna radiator 2, where the front edge cover antenna radiator 1 is connected to the rear edge cover antenna radiator 2 through a cable 3, the rear edge cover antenna radiator 2 includes a radiator 4 and an impedance matching box 5, the impedance matching box 5 includes a housing 7, a matching network 6 is disposed in the housing 7, a cover plate 8 is fixed to an upper port of the housing 7, a TNC-type connector 16 is fixed to one side of the housing 7, the matching network 6 includes a printed board 17, a first capacitor 18, a first inductor 19, a second inductor 20, and a second capacitor 21 are disposed on the printed board 17, an output end 22 and an input end 23 are disposed on the printed board 17, the output end 22 is welded to the rear edge cover antenna 2 through a small cross-section line, the input end 23 is sequentially connected in series with the first capacitor 18, the parallel first inductor 19, the series second inductor 20 and the second capacitor 21.

In this embodiment, the impedance matching box 5 is made of an aluminum alloy material with low corrosion resistance and low density.

In this embodiment, the impedance matching box 5 and the radiator 4 are connected by a bushing.

In this embodiment, a gasket 9 is disposed between the upper port of the housing 7 and the cover plate 8.

In this embodiment, the cover plate 8 is fixedly connected to the housing 7 through a first screw 10, a first flat washer 12, and a first spring washer 14.

In this embodiment, the TNC-type connector 16 is fixedly connected to the housing 7 through a second screw 11, a second flat washer 13, and a second spring washer 15.

In this embodiment, the inductance of the first capacitor 18 is 43pF, the inductance of the first inductor 19 is 0.73 uH, the inductance of the second inductor 20 is 0.36 uH, and the inductance of the second capacitor 21 is 6 pF.

The working principle is as follows: the ultra-short wave conformal antenna of the helicopter consists of a front edge cover antenna radiator 1, a rear edge cover antenna radiator 2 and an impedance matching box 5, wherein the front edge cover antenna radiator 1 and the rear edge cover antenna radiator 2 are connected through a cable 3, and the impedance matching principle is applied; the impedance matching principle is as follows: antenna theory indicates that when the input impedance of the antenna matches the output impedance of the station, all the high frequency energy is radiated by the antenna, with only the incident wave and no reflected wave on the feed line. When the impedance of the antenna is not matched, that is, the impedance of the antenna is not equal to the characteristic impedance of the feeder, the antenna cannot absorb all the high-frequency energy transmitted on the feeder, but only part of the energy. A portion of the energy of the incident wave is reflected back to form a reflected wave. As a result, the effective power of the transmitter is reduced, which affects the communication efficiency.

According to the antenna, the impedance matching box 5 is arranged on the rear edge cover antenna radiator 2 in the antenna, and the antenna is loaded by a lossless matching network, so that the impedance characteristic of the antenna is improved, and the impedance characteristic of a full frequency band tends to be gentle; the reactance component is reduced, the resistance component is increased, the bandwidth of the antenna is widened, the miniaturization of the antenna is realized, the loaded antenna not only has good matching broadband and radiation characteristics, but also increases the effective path of current, and the overall size of the antenna is greatly reduced; based on the principle, the invention has the beneficial effects that: the front edge cover antenna radiator 1 and the rear edge cover antenna radiator 2 are connected through a cable 3, a middle feeding mode is adopted, and an impedance matching network is designed by utilizing an Advanced Design System 2009. The device with good linear characteristic and high power resistance capacity is selected to solve the problems of impedance matching, noise interference, power capacity, linearity of frequency response and the like in the working frequency band range, and index requirements in the working frequency band range are realized. The whole antenna comprises: the antenna comprises a front edge cover antenna radiator 1, a rear edge cover antenna radiator 2 and an impedance matching box 5, wherein the conformal antenna radiator is further deformed of a rectangular dipole antenna, a smoother gain curve and good impedance bandwidth are obtained by adjusting the length-width ratio of the rectangular dipole, and meanwhile, the upper dipole of the dipole is folded and extended to cover the other edge of the tail wing, so that the radiation efficiency in the other edge direction can be obviously improved. On the other hand, lumped parameter loading is carried out on the antenna, so that the impedance characteristic of the full frequency band tends to be smooth, and the broadband of the antenna is further realized. The antenna radiator assembly is characterized in that a front edge cover antenna radiator 1 and a rear edge cover antenna radiator 2 are used as antenna radiator assemblies, an impedance matching box 5 is installed on the rear edge cover antenna radiator 2, secondly, the rear edge cover antenna radiator 2 and the rear edge cover antenna radiator 2 are electrically overlapped and sleeved with each other and a feed part, the radiators are laid inside a composite material and are conformal with a cover, and therefore the electrically overlapped and fed parts and the feed part can be fixed through screwing, maintenance and suitability are facilitated, reliability is improved, and meanwhile, the influence of welding on the strength of the front cover and the strength of the rear cover is avoided. The materials of the bushing, the pillar and the matching box are selected and coated, so that the environmental adaptability is improved.

The above disclosure is only for the specific embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any variations that can be made by those skilled in the art should fall within the scope of the present invention.