Circularly polarized pifa antenna with high stable phase center, GPS positioning system

A highly stable and circularly polarized technology, applied in the field of circularly polarized PIFA antennas and GPS positioning systems, can solve the problems of insufficient impedance and axial ratio bandwidth, and fewer antenna systems, so as to achieve improved phase stability, low cost, and easy Processing effect

Active Publication Date: 2021-10-12
XIDIAN UNIV
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Problems solved by technology

[0007] In summary, the existing problems in the prior art are: when circularly polarized PIFA antennas are used in wireless communication systems and global positioning systems, their achievable impedance and axial ratio bandwidth are not large enough, and the circularly polarized PIFA antenna design There are few antenna systems for GPS receiving frequency band (L1 frequency band, ie 1575.42MHz)

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  • Circularly polarized pifa antenna with high stable phase center, GPS positioning system
  • Circularly polarized pifa antenna with high stable phase center, GPS positioning system
  • Circularly polarized pifa antenna with high stable phase center, GPS positioning system

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Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] The present invention feeds the radiation part through the one-to-four Wilkinson power divider at the bottom of the rectangular dielectric plate, and properly connects the microstrip line on the output branch of the power divider to form the required phase shift at each output port, and finally realizes The feeding structure with the same feed phase amplitude and 90° phase difference in turn for each port. Each port of the power splitter excites the PIFA antenna to radiate energy through the feeding probe. By designing a symmetrical antenna structure, a symmetrical four-point uniform feeding structure, and symmetric...

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Abstract

The invention belongs to the technical field of wireless communication systems, and discloses a circularly polarized PIFA antenna with a high stable phase center and a GPS positioning system, including: a feeding structure and a radiation structure; Eight rectangular metal sheets and a metal column; the feed structure includes a three-stage Wilkinson power divider phase shifter printed on the lower layer of a rectangular FR4 dielectric board and four coaxial cables. Each port of the power divider excites the PIFA antenna to radiate energy through the feeding probe. By designing a symmetrical antenna structure, a symmetrical four-point uniform feeding structure and four symmetrical feeding points, the circular polarization performance of the antenna and A more stable phase center. The end-fire antenna of the invention has the characteristics of radiation circular polarization, high stable phase center, low profile, light weight and easy processing, and has broad application prospects in the field of new circularly polarized PIFA antennas.

Description

technical field [0001] The invention belongs to the technical field of wireless communication systems, and in particular relates to a highly stable phase center circularly polarized PIFA (inverted F) antenna and a GPS positioning system. Background technique [0002] At present, the closest existing technology: With the rapid development of wireless communication systems, satellite navigation and positioning technology also develops rapidly. There are 4 mature navigation systems, of which the Global Positioning System (Global Positioning System, GPS) uses GPS positioning satellites to perform real-time positioning and navigation around the world, providing low-cost, high-precision three-dimensional position, speed and accuracy for global users. Navigation information such as timing is a model of the application of satellite communication technology in the field of navigation. The GPS receiving frequency band is generally the L1 frequency band, that is, 1575.42MHz, and the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q15/24H01Q21/00H01Q21/20G01S19/37
CPCG01S19/37H01Q1/38H01Q1/50H01Q15/24H01Q21/0006H01Q21/20
Inventor 尹应增王思奇张皓任建
Owner XIDIAN UNIV
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