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Dual-mode dual-frequency circularly polarized antenna with CSRR distributed control and collar coupling

A circularly polarized antenna, distributed control technology, applied in the direction of antenna, antenna grounding device, antenna grounding switch structure connection, etc., can solve the problem of received signal attenuation, etc., and achieve the effect of improving impedance matching, low cost, and suppressing high-order modes

Inactive Publication Date: 2018-06-12
XIAMEN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When the linearly polarized antenna receives circularly polarized satellite signals, the received signal will be attenuated by 3dB

Method used

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  • Dual-mode dual-frequency circularly polarized antenna with CSRR distributed control and collar coupling
  • Dual-mode dual-frequency circularly polarized antenna with CSRR distributed control and collar coupling
  • Dual-mode dual-frequency circularly polarized antenna with CSRR distributed control and collar coupling

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0032] see Figure 1~3, the embodiment of the present invention is provided with a square dielectric substrate with a dielectric constant of 6.15, a side length of Sub1 = Sub2 = 59.00 mm, and a thickness of the dielectric plate of 2.54 mm. The upper and lower surfaces of the dielectric substrate are covered with good conductors, and the good conductors on the upper surface are processed into two parts: an inner rectangular sheet and an outer rectangular frame-shaped radiation patch, which are connected by four bridges located in the middle of the four sides of the above structure. The length of the bridge is gap_l=10.00mm, and the width is gap_w=1.50mm. Four T-shaped slits are used to load the outer middle of the outer frame-shaped rectangular radiation patch, and the upper left corner and lower right corner of the outer frame-shaped patch are respecti...

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Abstract

The invention provides a dual-mode dual-frequency circularly polarized antenna with CSRR distributed control and collar coupling, and relates to a circularly polarized microstrip antenna. A dielectricsubstrate is provided, and upper and lower surfaces of the substrate are covered with good conductors. The upper surface is processed into an inner rectangular sheet and an outer rectangular frame-shaped radiating patch, and the inner rectangular sheet and the outer rectangular frame-shaped radiating patch are connected through four bridges located in the middle of four sides. Four T-shaped slotsare loaded in the middle of the outer side of the radiating patch. In the upper left and lower right corners, ladders of the same size are loaded respectively to control the orthogonal degenerate mode and the circular polarization axis ratio. The internal rectangular patch is a rectangular patch with double cut corners. The cut corners are located on the upper right side and lower left side of the inner rectangular patch. Four complementary open rectangular or circular CSRR resonant ring structures are added near the corners in the inner rectangular patch, wherein each structure is composed of two C-shaped rings with openings nested in each other. Each structure is formed by rotating a CSRR in the upper right corner 90 degrees clockwise. A rectangular grounding plate with double-ring concentric rectangular nested rings is arranged on the lower surface of the substrate, and the rectangular grounding plate and the rings are in interleaved connection through two bridges.

Description

technical field [0001] The invention relates to a circularly polarized microstrip antenna, in particular to a dual-mode, dual-frequency circularly polarized antenna with CSRR distribution control and collar coupling ground suitable for Beidou B2 / S frequency band. Background technique [0002] A satellite navigation system is a system that uses satellites to provide geospatial information. A time signal sent by satellite broadcast allows a small electronic receiver to determine its position with high precision. Satellite navigation in the early 20th century was intended for military applications. Satellite navigation allows for the precise delivery of weapons at targets, greatly increasing lethality while reducing unintentional deaths. In the 21st century, satellite navigation plays a vital role in civilian fields such as navigation, surveying and mapping, precise time reference, and weather forecasting. Therefore, satellite navigation has also become an important research...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q15/24H01Q25/04H01Q5/10H01Q5/20
CPCH01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/20H01Q15/24H01Q25/04
Inventor 游佰强林兵周建华黄疆李杰李伟文
Owner XIAMEN UNIV
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