A GPS/bdii triple-band dual-system active satellite navigation receiving antenna applied to micro-unmanned aerial vehicles

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 invention belongs to the field of satellite navigation, and relates to a lightweight and small satellite navigation antenna designed with a special-shaped structure. Background technique [0002] Micro UAVs have strict requirements on the size, height, weight and anti-interference performance of the antenna. Under the condition of meeting the navigation requirements of timing and positioning, the miniaturization of aerial antennas is the development direction of future UAV navigation system research. [0003] With the rapid development of my country's Beidou second-generation satellite navigation system, GPS / BDII dual-system integrated antenna is the development trend of future aviation antennas. [0004] The task requirement of the micro UAV is: design a small aerial antenna, the antenna is placed in the structure of the antenna cabin, the plane size of the cabin structure is shown in figure 1 As shown, the cabin height is 13mm ( Figure 1 It ...

AI Technical Summary

Problems solved by technology

[0005] Currently on the market, GPS L1 and BDII B1 are the mainstream combination of small aerial antennas. They are compatible with the miniaturized aerial antenna size of BDII B3. If a laminated structure is used, the volume and weight will be large, which cannot meet the small size of the micro drone. , light weight, and low profile height requirements; Since the frequency ratio of the two frequency points L1 and B3 is 1.24, if the antenna adopts coplanar multi-frequency technology, the frequency point frequency ratio must be greater than 1.5

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

Images