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Bandwidth-broadened single-fed single-layer circularly polarized micro-strip antenna based on multi-orthogonal-mode fusion

A microstrip antenna, orthogonal mode technology, applied in the field of UAV satellite navigation, can solve the problems that a single navigation system cannot meet the positioning accuracy requirements, satellite signal occlusion, etc., to expand the use environment range, strong oxidation resistance, improve The effect of the service life

Inactive Publication Date: 2019-08-06
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The global satellite navigation system can theoretically provide navigation and positioning services for users around the world at any time and any place, but in urban buildings, mountains or forests, due to serious multipath problems, satellite signals are severely blocked, and a single navigation system Will not meet the positioning accuracy requirements

Method used

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  • Bandwidth-broadened single-fed single-layer circularly polarized micro-strip antenna based on multi-orthogonal-mode fusion
  • Bandwidth-broadened single-fed single-layer circularly polarized micro-strip antenna based on multi-orthogonal-mode fusion

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0024] The present invention provides a broadband circularly polarized microstrip antenna that proposes a three-orthogonal mode, which utilizes the introduction of an asymmetrical U-shaped slot on a traditional cut-angle microstrip antenna and four slots according to 0°, 90°, 180°, and 270° The method of rectangular parasitic patches arranged in order to excite multiple pairs of orthogonal modes, combined with the method of slot coupling feeding, adds an annular slot with a radius of about one-tenth of the wavelength corresponding to the center frequency at the feeding center, To broaden the impedance bandwidth of the antenna.

[0025] Such as figure 1 Shown is a side view of the microstrip antenna. It can be seen from the figure that a single-feed single-layer circularly polarized microstrip antenna with multi-orthogonal mode fusion to widen t...

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Abstract

A bandwidth-broadened single-fed single-layer circularly polarized micro-strip antenna based on multi-orthogonal-mode fusion relates to the technical field of unmanned aerial vehicle satellite navigation. The micro-strip antenna comprises a dielectric substrate, a probe, a metal floor and an SMA joint. The metal floor is of a horizontally-placed square plate structure. The SMA joint is axially, vertically and fixedly installed on the lower surface of the metal floor. The dielectric substrate is of a square plate structure. The dielectric substrate is placed horizontally above the metal floor.The probe is axially, vertically and fixedly installed between the dielectric substrate and the metal floor. The axial tip of the probe passes through the dielectric substrate, and the axial top of the probe is parallel to the upper surface of the dielectric substrate. The impedance bandwidth of the circularly polarized antenna is broadened, the aerodynamic effect of the antenna on unmanned aerialvehicles is reduced, and the positioning accuracy of the system is improved. The micro-strip antenna has the advantages of small size, low weight and low cost.

Description

technical field [0001] The invention relates to the technical field of satellite navigation for unmanned aerial vehicles, in particular to a single-feed single-layer circularly polarized microstrip antenna with multi-orthogonal mode fusion to widen the bandwidth. Background technique [0002] With the continuous development of satellite navigation and positioning technology, the satellite navigation industry has become the fastest-growing information industry in the world after mobile communications and the Internet. Major countries and organizations in the world are actively developing their own satellite navigation and positioning systems, among which the GPS system of the United States, the GLONASS system of Russia, the Galileo system of the European Union and the Beidou system of my country are the most influential. In order to improve the user's positioning accuracy and avoid the constraints of a single system, multi-system coexistence and multi-mode compatible satellit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/28H01Q1/36H01Q1/38H01Q1/40H01Q1/48H01Q1/50
CPCH01Q1/285H01Q1/364H01Q1/38H01Q1/40H01Q1/48H01Q1/50
Inventor 刘硕李小军董士伟禹旭敏董亚洲王颖朱舸王新峰安义军
Owner XIAN INSTITUE OF SPACE RADIO TECH
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