Lightning-protection type GNSS (Global Navigation Satellite System) signal relay amplifier

Abstract

The invention provides a lightning-protection type GNSS (Global Navigation Satellite System) signal relay amplifier which is suitable for long-distance transmission of GNSS signals and is applied to a clock system for mobile communication. The invention aims at providing a high-reliability GNSS signal relay amplifier capable of avoiding the use of a lightning arrester and effectively preventing the damage caused by lightning stroke. The lightning-protection capability of the GNSS signal relay amplifier meets the requirements of YD / T5098-2011 communication bureau (station) atmospheric overvoltage protection engineering design specification of communication industry standard. The GNSS signal relay amplifier consists of a thread-fixed closed needle type radio frequency connector, a closed aluminum alloy protection shell, a box body sealing rubber ring, a lightning-protection type GNSS low-noise amplification module and a plurality of bolts and has the advantages of being simple in structure, effective in lightning protection, excellent in sealing property and convenient for construction, cost-saving and meeting the requirements of the industry lightning-protection standard.

Description

technical field [0001] The invention relates to a GNSS (Global Navigation Satellite System) signal relay amplifier, which is applied to the long-distance transmission of GNSS signals in mobile communication to enhance the signal level, and belongs to the communication field. Background technique [0002] The GNSS global navigation satellite system currently includes the GPS of the United States, GLONASS of Russia, Compass (Beidou) of China, and Galileo system of the European Union. It has the advantages of global, all-weather, real-time and high precision. Using the principle of time ranging and positioning, it can perform all-weather, real-time high-precision three-dimensional positioning, speed measurement and precise timing for various mobile users such as ground vehicles, sea vessels, aircraft, missiles, satellites and spaceships. [0003] In the application of GNSS in the field of time service, it is an important aspect to provide a time reference for the mobile communi...

AI Technical Summary

Problems solved by technology

But the reality is that the base stations are built in open places and are higher than other surrounding buildings, so they are vulnerable to lightning strikes, direct lightning strikes or conduction of lightning discharge currents, which induce impulse voltages of tens of kilovolts in the GNSS signal lines. Generate an impulse current as high as 5KA, causing damage to the GNSS relay amplifier, which cannot meet the requirements of the People's Republic of China Communication Industry Standard YD / T5098-2001 "Communication Bureau (Station) Lightning Overvoltage Protection Engineering Design Specifications" not less than 5KA standards, can not achieve effective lightning protection

In practical applications, in order to ensure the reliability of the system, lightning arresters must be installed on the input and output ports of the interrupt amplifier, which greatly increases the cost and increases the amount of engineering construction.

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