Polarization reconfigurable broadband circular polarization omnidirectional antenna

An omnidirectional antenna and circular polarization technology, which is applied in the direction of antenna, antenna grounding device, antenna grounding switch structure connection, etc., can solve the problem of single function, achieve the effect of increasing impedance bandwidth and axial ratio bandwidth, and ensuring broadband

Inactive Publication Date: 2019-08-13
XIDIAN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the defect is that only one kind of circular polarizat

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  • Polarization reconfigurable broadband circular polarization omnidirectional antenna
  • Polarization reconfigurable broadband circular polarization omnidirectional antenna
  • Polarization reconfigurable broadband circular polarization omnidirectional antenna

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[0029] The following describes the present invention in further detail with reference to the drawings and specific embodiments:

[0030] Reference figure 1 , A polarization reconfigurable broadband circularly polarized omnidirectional antenna, including a dielectric substrate 1, a radiating unit 2, a metal floor 3 printed on the lower surface of the dielectric substrate 1, a monopole radiator 4 and a DC circuit unit 5. The dielectric substrate 1 uses a cylinder with a dielectric constant of 2.2 and a loss tangent value of 0.0009, a radius of 30 mm, and a thickness of 10 mm.

[0031] Reference figure 2 , The radiation unit 2 includes a ring-shaped patch 21 printed on the upper surface of the dielectric substrate 1 and a metal patch 22 located in the ring of the ring-shaped patch 21, the metal patch 22 used in this example The shape is easier to process while achieving antenna performance. The center of the ring patch 21 coincides with the center of the metal patch 22 and is locate...

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Abstract

The invention provides a polarization reconfigurable broadband omnidirectional antenna. According to the invention, the polarization reconfigurable characteristic can be achieved under the condition of ensuring the broadband circular polarization omnidirectional property of the antenna. The antenna comprises a dielectric substrate, a radiation unit, a floor, a monopole radiator and a direct current circuit unit. The radiation unit comprises an annular patch printed on the upper surface of the dielectric substrate, a metal patch in a ring and a microstrip line which is connected with the annular patch and the metal patch. The periphery of the metal patch is provided with the gap and a parasitic coupling patch, so that the broadband characteristic of the antenna is ensured. The annular patchand an arc patch printed on the lower surface of a dielectric substrate are provided with diodes, and are connected with each other through a first metalized through hole, so that the polarization reconfigurable characteristic is realized. The monopole radiator penetrates through the through holes in the floor and the dielectric substrate and is connected with the metal patch. The direct currentcircuit unit comprises a grounding patch, a power supply patch and a second metalized through hole for connecting the grounding patches on the upper surface and the lower surface of the dielectric substrate.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a wide-band circularly polarized omnidirectional antenna with reconfigurable polarization, which can be widely used in radio broadcasting and satellites, global positioning systems, access points of wireless local area networks (WALN), etc. occasion. Background technique [0002] An omnidirectional antenna means that the antenna can uniformly radiate electromagnetic wave signals on a certain plane in free space. In this plane, the antenna's pattern is approximately a circle from a mathematical point of view. Due to the characteristics of high-speed movement and uncertain trajectory of civilian vehicle-mounted, airborne, ship-borne and other mobile platforms. Therefore, in the operation process, the communication antenna is required to have good radiation characteristics, so that the antenna carrier in various states can effectively receive the incoming wave signal. [0003] An...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q15/24
CPCH01Q1/38H01Q1/48H01Q1/50H01Q15/24
Inventor 姜文李昂杰李小秋孙红兵周志鹏程通
Owner XIDIAN UNIV
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