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Anti-multipath interference antenna for GNSS

An anti-multipath and antenna technology, applied in the field of GNSS, can solve the problems of difficult processing and high floor cost, and achieve the effects of reduced section height, low cost and small volume

Active Publication Date: 2014-06-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this floor is usually expensive and difficult to process

Method used

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  • Anti-multipath interference antenna for GNSS
  • Anti-multipath interference antenna for GNSS

Examples

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Embodiment

[0035] In this embodiment, the anti-multipath interference antenna used for GNSS operates in the L-band, and the central operating frequency is 1.575 GHz. The first dielectric layer 1 adopts a polytetrafluoroethylene dielectric plate with a relative permittivity of 2.65 and a thickness of h1=1 mm; The second dielectric layer 5 is an FR4 dielectric plate with a relative permittivity of 2.25 and a thickness of h2=4mm. The specific parameters of the size of the anti-multipath interference antenna for GNSS are as follows: image 3 Shown h1=1mm, h2=4mm, st=2.5mm; Figure 4 As shown, r1=34.6mm, r2=41.5mm, Ls=23mm, Ws=1.35mm, fx=6.5mm, fy=6.5mm, R1=42.5mm, R2=45mm, R3=65mm.

[0036] Figure 5 It is the S11 curve diagram of the anti-multipath interference antenna for GNSS described in the embodiment of the present invention;

[0037] Figure 6 It is the axial ratio curve diagram of the anti-multipath interference antenna for GNSS described in the embodiment of the present invention;...

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Abstract

The invention discloses an anti-multipath interference antenna for a GNSS. The anti-multipath interference antenna is miniaturized, low in profile, low in cost and easy to process. The anti-multipath interference antenna comprises a first medium layer and a floor fixed on the upper surface of the first medium layer. The floor is provided with an annular groove and divided into an internal area and an external area by the annular groove. The internal area and the external area are connected through a plurality of lumped resistors which are connected to the two sides of the annular groove in a bridging mode. A second medium layer and a microstrip patch layer are fixed on the upper surface of the internal area of the floor, wherein the microstrip patch layer is fixed on the upper surface of the second medium layer. According to the anti-multipath interference antenna, as it is unnecessary to arrange a multilayer fold structure on the floor, the profile height of the antenna can be reduced greatly. The antenna is small in size, light in weight, low in cost, small in lateral dimension and convenient to install and carry. Compared with a solid floor with the same size, the backward cross-polarization of the antenna can be lowered by 13dB or more to the maximum degree, and the maximum gain of co-polarization can keep unchanged basically. The anti-multipath interference antenna is suitable for being popularized and applied in the technical field of GNSSs.

Description

technical field [0001] The invention relates to the technical field of GNSS, in particular to an anti-multipath interference antenna for GNSS. Background technique [0002] In the global satellite navigation and positioning system (GNSS), multipath interference is one of the main factors causing system positioning errors. Multipath interference is generated by the reflection and diffraction of atmospheric and surface objects to the satellite receiver. These signals have different or opposite amplitude, phase and polarization information compared with the direct path arrival signal, which will interfere with the discrimination of the receiver and degrade the system performance. Therefore, how to effectively resist multipath interference has become an urgent problem to be solved in GNSS applications. [0003] It is easy for the receiver to identify and filter out long-time-delay multipath signals. However, for the short-delay multipath signal reflected and diffracted by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q1/38
Inventor 杨鹏闫飞李岩杨峰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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