Lightning-proof GNSS active antenna

Abstract

The invention discloses a lightning-proof GNSS active antenna and relates to a GNSS receiving antenna which is applicable in navigation, positioning and time and frequency standards. The problem to be solved by the invention is to provide a high-reliability GNSS active antenna which avoids using a lightning arrester, effectively prevents damages caused by lightning stroke and has a lightning-proof capability meeting the requirements of communication industrial standards of 'Specifications for Engineering Design of Lightning Over-Voltage Protection for Communication Bureaus(Stations )' YD / T5098-2001. The lightning-proof GNSS active antenna is characterized in that: a GNSS passive antenna, a GNSS low noise amplification module, a radio-frequency cable, a lightning-protection module and a bolt-fixed sealed type needle radio frequency connector are connected in turn and accommodated in a sealed shell which consists of a radar cover and a mounting chassis; and the modularized and layered structure design is adopted, so that a production process is simplified, the production efficiency is improved and the production cost is reduced. The lightning-proof GNSS active antenna effectively prevents the active antenna being damaged by the lightning stroke, avoids using the lightning arrester, saves the system cost and simplifies the project installation.

Description

technical field [0001] The invention relates to a GNSS (Global Navigation Satellite System) receiving antenna, especially suitable for navigation, positioning and time-frequency reference. 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 spacecraft; for the field of surveying and mapping, GNSS satellites Positioning technology has been used to establish a high-precision national geodetic control network to determine global geodynamic parameters; to establish land-ocean geode...

AI Technical Summary

Problems solved by technology

In the actual implementation example, the GNSS passive antenna is generally connected to the low noise amplifier module with frequency selection function, the amplifier is connected to the RF connector, and then stored in the radome and the RF connector is drawn out to form a GNSS Active antenna, then GNSS active antenna, lightning arrester, RF coaxial cable, lightning arrester, and base station GNSS receiver are connected in sequence to form a timing application system. At the same time, there are also application examples of adding anti-surge devices on the substrate of the amplifier unit, such as patent No. ZL200620024687.3 and ZL200620132858.4 are two embodiments, but the above two schemes simply add surge absorbing devices (transient voltage suppression diodes) in the circuit, which are far from the communication industry standard of the People's Republic of China YD / The standard not less than 5KA required in T5098-2001 "Communication Bureau (Station) Lightning Overvoltage Protection Engineering Design Code" does not meet the lightning protection effect

In practical applications, in order to ensure the reliability of the system, lightning arresters must be added, which increases the difficulty of engineering construction and increases the cost.

Images