GPS/BDII three-frequency double-system active satellite navigation receiving antenna applied to micro-miniature unmanned aerial vehicle

Abstract

The invention provides a GPS / BDII three-frequency antenna applied to a micro-miniature unmanned aerial vehicle. The antenna comprises a passive medium ceramic antenna chip assembly, a low-noise amplification circuit and a shielding box, wherein the ceramic antenna chip assembly comprises two high-dielectric-constant ceramic antenna chips; the low-noise amplification circuit comprises two radio frequency branches; the shielding box is designed to have the same shape as a circuit board and has the effects of prevention of foreign matters and electromagnetic shielding. The antenna is compatible with GPS / BDII double-system three-frequency-point operation and has the characteristics of good anti-jamming performance and overvoltage / power supply reverse connection prevention.

Description

Technical field: [0001] The present invention is a satellite navigation field, involving a lightweight and small satellite navigation antenna that uses different structured structures. [0002] Background technique [0003] Timinal drones are demanding on the size, height, weight, and anti -interference performance of the antenna.Under meet the needs of navigation and positioning, miniaturization of aviation antennas is the development direction of the research of future drone navigation systems. [0004] With the rapid development of my country's Beidou second -generation satellite navigation system, the integrated antenna of the GPS / BDII dual system is the development trend of the future aviation antenna. [0005] This tiny drone task needs: Design a small aviation antenna, the antenna is placed in an antenna compartment structure, and the plane size chart of the cabin structure is figure 1 Show, the height of the cabin is 13mm ( Figure 1 It is a two -dimensional plane size dia...

AI Technical Summary

Problems solved by technology

[0006] Currently on the market, GPS L1 and BDII B1 are the mainstream combination of small aerial antennas, which are compatible with the miniaturized aerial antenna size of BDII B3. If a laminated structure is used, the volume and heavy weight, which cannot meet the requirements of small size, light weight, and low profile height of the micro UAV; Since the frequency ratio of the two frequency points of L1 and B3 is 1.24, if the antenna using the coplanar multi-frequency technology requires frequency point The frequency ratio must be greater than 1.5

Therefore, the coplanar multi-frequency technical solution cannot meet the mission requirements.

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