Relay repeater system for unmanned helicopter

A technology of unmanned driving and forwarding system, which is applied in the direction of radio transmission system, transmission system, communication between multiple stations, etc., and can solve problems such as low cost performance, increased antenna height, and extended propagation distance

Inactive Publication Date: 2008-10-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 2. The height of the antenna is increased to extend the propagation distance
[0016] 2. Any communication transceiver has a limited distance. If you want to expand the communication distance, you can use the method of i

Method used

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  • Relay repeater system for unmanned helicopter
  • Relay repeater system for unmanned helicopter
  • Relay repeater system for unmanned helicopter

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Embodiment Construction

[0073] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0074] The basic block diagram of the system is as follows: image 3 shown. The airborne relay forwarding subsystem in the present invention uses the unmanned helicopter as the air platform, receives the signal in the UHF / VHF frequency band emitted by the long-distance communication source, converts the frequency into a high-frequency signal and forwards it, and receives the high-frequency signal on the ground , and restore its down-conversion to the communication source signal. The frequency of the high-frequency signal can be changed according to the requirements. In this manual, the S-band is used as an example for illustration. The present invention includes airborne and ground two parts, the airborne part includes a relay and forwarding subsystem, and the ground part includes a ground receiving subsystem.

[0075] The airborne relay forwarding s...

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Abstract

The invention discloses a relay transmitting system used for an unmanned helicopter, which rises the height of the unmanned helicopter to promote the transmission quality of signals in a spatial channel, and can transmit the relay with a weak signal even in the distance, thus increasing the communication distance; the invention is characterized by high sensitivity, wide dynamic range, broad transmitting band and good anti-interference performance. The invention comprises two main parts of an airborne part and a ground part, wherein, the airborne part is carried with a relay transmitting subsystem and consists of four modules of an airborne receiving antenna, an airborne relay transmitting module, a broad band filter and an airborne transmitting antenna; and the ground part comprises a ground receiving subsystem including three modules of a ground receiving antenna, a vehicle low noise amplifier and a ground receiving module. The system of the invention is simple, high-efficient and reliable and has low cost. By combining with the flexibility and mobility of the unmanned helicopter, the system of the invention can be applied in the fields of television and broadcasting, etc.

Description

technical field [0001] The invention relates to a relay and forwarding system for an unmanned helicopter, and belongs to the field of unmanned helicopter relay systems. Background technique [0002] Ultra High Frequency (UHF for short) and Very High Frequency (VHF for short) frequency bands are common frequency bands in various countries. This frequency band is widely used in the fields of television, FM radio, radar, navigation and short-distance communication. Due to the high frequency of the UHF / VHF band, direct transmission is mainly used for space transmission, so the transmission distance is limited. [0003] 1. Characteristics of UHF / VHF signal space propagation [0004] Due to the frequency characteristics of UHF / VHF band signals, there are two main propagation modes when transmitting in the atmosphere: the linear propagation mode in free space within the line of sight and the scattering and diffraction propagation mode outside the line of sight. [0005] (1) Strai...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04B7/26
Inventor 张晓林常啸鸣鲍君海谭征
Owner BEIHANG UNIV
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