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Helicopter antenna

A technology for helicopters and antennas, applied in the direction of antenna support/installation device, radiation element structure, radiation unit cover, etc., can solve the problems of unable to change the antenna radiation elevation angle, reduce antenna reliability, reduce communication distance, etc., to eliminate Effects of dithering noise and broken wires, improving antenna patterns, and solving dead zone problems

Inactive Publication Date: 2014-08-06
陕西烽火诺信科技有限公司
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  • Application Information

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Problems solved by technology

[0005] 2 Radiation elevation angle is small, with communication blind area
[0006] It can be seen from the principle of the antenna that the 3dB bandwidth of the radiation pattern of the antenna (this indicator determines the radiation elevation angle of the antenna) is fixed, and the antenna radiation elevation angle cannot be changed by changing the diameter and length of the antenna, so there is a communication dead zone in the axial direction of the antenna
[0007] 3. With jitter noise, broken wire phenomenon
Antenna jitter will generate jitter noise, which will be transmitted to the communication system through the antenna, affecting the normal operation of the communication system, and there may be broken wires, which poses a great safety hazard
[0009] 4. Icing phenomenon
Consequences of icing: the antenna will aggravate the mechanical resonance phenomenon, reduce the reliability of the antenna, and because the antenna conductor is exposed and in direct contact with the ice layer, the communication distance will be reduced, because the ice layer will cause the impedance of the antenna to change, and the Strong electrostatic interference phenomenon occurs

Method used

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0034] figure 1 It is a structural schematic diagram of a helicopter antenna in the present invention, specifically including antenna tube one 1, antenna tube two 2, antenna tube three 3, antenna tube four 4 and a support frame 5. Among them, antenna tube one 1, antenna tube two 2, antenna tube three 3, and antenna tube four 4 are connected through a plug-in structure to form an integrated "Z" shape, and then the support...

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Abstract

A helicopter antenna is characterized in that the antenna is of a 'Z'-shaped tube shape, a spiral radiator is disposed inside the antenna, and the working frequency band of the antenna is 2MHz-30MHz. The helicopter antenna has the advantages that on the basis of guaranteeing the performance of the antenna, the length of the antenna is reduced, the directivity angle of the antenna is increased, jitter noise and wire fracture are reduced, and influence of freezing on the antenna is reduced.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a helicopter antenna. Background technique [0002] At present, most of the airborne antennas used in the short-wave (HF) frequency band in my country's helicopter communication system are cable antennas. This type of antenna has the following shortcomings and problems to be solved: [0003] 1. The size is too long [0004] The cable antenna is a single-stage sub-antenna that relies on the resonance of the cable whose electrical length is 1 / 4 of the signal wavelength. Because the wavelength of the short-wave frequency band is longer, the antenna length is relatively large. [0005] 2 Radiation elevation angle is small, with communication blind zone [0006] It can be seen from the principle of the antenna that the 3dB bandwidth of the radiation pattern of the antenna (this indicator determines the radiation elevation angle of the antenna) is fixed, and the antenna radiation el...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/12H01Q1/42
Inventor 张志云于汶涛卢攀张伟东魏宁强任利媛
Owner 陕西烽火诺信科技有限公司
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