With the development of science and technology, satellite positioning technology is also developing. Today, satellite positioning technology has developed very well. Satellite positioning technology has developed from military to civilian aspects, such as navigation and positioning, synchronous clock, mobile phone, traffic recorder, sharing vehicle, ship, meteorological observation and so on. Satellite positioning technology is needed.

Satellite positioning technology is mainly used for civilian use. Satellite positioning provides people with precise time information, but satellite positioning technology also has its shortcomings. For example, satellite signals will be affected by electromagnetic interference, weather effects and shelters, but the effect of receiving satellites in open space is better, but in enclosed space such as enclosed vehicles, tunnels, Underground parking lots, tall buildings in concrete buildings, metal spaces, and closed production workshops will cause satellite signals to decrease or even have no satellite signals. Although these scenarios will affect satellite signals, satellite signals will not have a great impact on people's lives, but they will be very influential in industrial production, scientific research equipment and application testing. To solve this problem, Xi'an synchronous Electronic Technology Co., Ltd. has developed the SYN2308 GNSS satellite signal transponder, which is a low cost and high gain GNSS satellite signal forwarding system. It can receive satellite signals such as GPS, GLONASS, BeiDou, Galileo and so on, which can meet the needs of special environment for satellite signals.

When a production workshop performs industrial production or scientific research, if it needs to receive satellite signals, but also because the area is too large or the use environment is relatively hidden, resulting in satellite signal attenuation or even no satellite signal, this requires the use of SYN2308 GNSS satellite signal repeater, which can introduce satellite signals from indoor to outdoor or receive satellite signals. The working principle is that the signal received by the satellite antenna is transmitted to the SYN2308 GNSS satellite signal transponder through the coaxial cable. After receiving the satellite signal, the GNSS satellite signal transponder amplifies and filters the signal, and then replaces the antenna to the place where the signal is not received. This can solve the demand for satellite signals in large workshops, laboratories or some special environments, and ensure the normal operation of industrial production. The equipment is composed of GPS Beidou satellite antenna, GNSS satellite signal transponder and transmitting antenna. Its working principle is as follows:

The GNSS satellite signal transponder has the advantages of high stability, high cost performance, convenient portability and simple operation. It can be applied in many working environments, especially in underground parking lots, mines, engine rooms, launch chambers, tunnels and other special scenes. GNSS satellite signal transponder can also be applied to R & D of satellite positioning products, such as satellite navigation, ship, vehicle navigation, timing equipment, aerospace.

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