Plough time service integral receive antenna

Abstract

This invention discloses a Beidou passive timming type receiving antenna including a microband antenna, a protection circuit, a first stage low noise amplifying circuit, a bandpass filter circuit and a second stage low noise amplifying circuit, in which, the microband antenna is connected to the protection circuit, which is connected to the first stage low noise amplifying circuit, the output of which is connected to the medium filter to be connected with the second stage amplifying circuit. Advantages: receiving in one-way, no limit to users, less sensitivity in receiving signals, small time delay, active antenna and coaxial feed.

Description

technical field [0001] The invention relates to a receiving antenna, in particular to a Beidou timing-service integrated receiving antenna. Background technique [0002] The Beidou satellite navigation and positioning system is a navigation and positioning system with my country's independent intellectual property rights, comparable to the US GPS and Russia's GLONASS. At present, the GPS system is mainly used in China. There are not many Beidou system application products with independent intellectual property rights in my country. Even among the existing Beidou products, they are mainly two-way positioning-based products. [0003] At present, there is no radio frequency receiving device dedicated to the needs of Beidou time service users. The radio frequency devices based on the Beidou navigation and positioning system are mainly products based on two-way positioning applications. Due to the limitations of the Beidou system on the number of two-way users, the number of such...

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Problems solved by technology

[0003] At present, there is no radio frequency receiving device dedicated to the needs of Beidou time service users. The radio frequency devices based on the Beidou navigation and positioning system are mainly products based on two-way positioning applications. Due to the restrictions on the number of two-way users in the Beidou system, the number of such users can't be too much

Considering the potential safety hazards of using GPS, the Beidou system with independent intellectual property rights in my country has great market potential, but the bidirectional working mechanism of the Beidou system severely limits the number of Beidou user groups and the development of Beidou applications

[0004] At the same time, the two-way radio frequency device used for positioning has a large delay and poor consistency in receiving satellite signals, which cannot meet the accuracy requirements of timing users. The timing accuracy is generally required to be less than 100ns or lower

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