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Wide-axial-ratio beam dual-frequency Beidou navigation antenna capable of effectively suppressing backward cross polarization

A Beidou navigation and axial ratio technology, which is applied to antenna unit combinations, antennas, slot antennas and other directions with different polarization directions, can solve the problem of not finding dual frequency bands, etc., and achieve the effect of stable output amplitude and phase characteristics

Active Publication Date: 2021-08-31
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

In addition, the published circularly polarized antennas with a wide 3-dB axial ratio beam and high backward cross-polarization suppression performance are only suitable for single-band, and no relevant reports on dual-band designs have been found

Method used

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  • Wide-axial-ratio beam dual-frequency Beidou navigation antenna capable of effectively suppressing backward cross polarization
  • Wide-axial-ratio beam dual-frequency Beidou navigation antenna capable of effectively suppressing backward cross polarization
  • Wide-axial-ratio beam dual-frequency Beidou navigation antenna capable of effectively suppressing backward cross polarization

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Embodiment Construction

[0035] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0036] Such as figure 1, as shown in 2 and 3, a wide-axis ratio beam dual-frequency Beidou navigation antenna that can effectively suppress backward cross-polarization includes: a first circular dielectric substrate 1, a coupling slot loaded with an upper circular radiation patch 2, a second Circular dielectric substrate 3 , lower circular radiation patch 4 , slotted ground plate 5 , inner curved metal stub 6 , outer curved metal stub 7 , grounding probe 8 , and broadband miniaturized four-feed network 9 . The coupling slot loads the upper circular radiation patch 2, which includes a first circular radiation patch 21 and a circular coupling slot 22; there are four circular coupling slots 22 ...

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Abstract

The invention discloses a wide-axial-ratio beam double-frequency Beidou navigation antenna capable of effectively suppressing backward cross polarization, which comprises a first circular dielectric substrate, a coupling gap loading upper-layer circular radiation patch, a second circular dielectric substrate, a lower-layer circular radiation patch, a slotted grounding plate, an inner-ring bent metal branch knot, an outer-ring bent metal branch knot, a grounding probe and a broadband miniaturized four-feed network. The four-feed network of the structure has stable output amplitude and phase characteristics and can provide stable circular polarization excitation signals for the antenna, and specifically, within the working frequency range of Beidou navigation, the amplitude error of the output signals of the four-feed network is smaller than 1dB, and the phase error is smaller than 5 degrees.

Description

technical field [0001] The invention relates to the field of a wide-axis ratio beam antenna, in particular to a wide-axis ratio beam dual-frequency Beidou navigation antenna that can effectively suppress backward cross-polarization. Background technique [0002] Circularly polarized antennas are widely used in global satellite navigation systems due to their advantages of suppressing multipath interference and reducing polarization mismatch. Therefore, circularly polarized antenna structures such as crossed dipole antennas, quadrifilar helical antennas, and microstrip antennas have been extensively studied. Among them, the microstrip antenna has always been a research hotspot because of its small size, light weight, and low cost. In order to achieve high-precision positioning, circularly polarized microstrip antennas need to have high polarization purity, wider circular polarization angles, more symmetrical radiation patterns, and stronger multipath suppression capabilities...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/52H01Q5/20H01Q13/10H01Q21/24
CPCH01Q1/38H01Q1/48H01Q13/106H01Q1/52H01Q5/20H01Q21/24
Inventor 刘宏梅张妍王鑫硕王佳慧房少军王钟葆
Owner DALIAN MARITIME UNIVERSITY
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