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Reconfigurable bessel antenna with adjustable non-diffracting beam direction

A beam direction, non-diffraction technology, applied in the direction of antenna, radiating element structure, antenna grounding switch structure connection, etc., can solve the problem of inability to effectively control near-field non-diffractive Bessel beams in real time

Active Publication Date: 2021-01-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention proposes a reconfigurable Bessel antenna with adjustable non-diffraction beam direction based on a reconfigurable metasurface, which solves the problem that the near-field non-diffraction Bessel beam direction cannot be effectively regulated in real time in the prior art

Method used

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  • Reconfigurable bessel antenna with adjustable non-diffracting beam direction
  • Reconfigurable bessel antenna with adjustable non-diffracting beam direction
  • Reconfigurable bessel antenna with adjustable non-diffracting beam direction

Examples

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Embodiment 1

[0039] For the TM mode Bessel antenna, the antenna is simulated by using HFSS.

[0040] Set the working frequency to 10GHz; the antenna structure parameters are as follows: the radius is 88.8mm, the height is 1mm; the size of the upper and lower patches of the reconfigurable impedance surface structure is 2.32mm, and the Rogers 6006 dielectric substrate is used, and the dielectric constant is 6.15. The height is 0.127mm; the Bessel antenna uses coaxial feed to excite the Bessel wave in the radial waveguide, and then when the Bessel wave propagates in the radial waveguide cavity, it leaks out to the free space through the reconfigurable impedance surface structure, thus Generate leaky waves.

[0041] The adjustable device in the reconfigurable impedance surface structure adopts PIN switches, and the PIN switches are covered with the entire reconfigurable impedance surface structure, such as image 3 (a) shown. First, the PIN switches are all off and biased at 0V. At this poi...

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Abstract

The invention relates to the field of microwave antennas and solves the problem in the prior art that the Beseel beam direction cannot be effectively adjusted in real time at a fixed microwave frequency. The reconfigurable Bessel antenna with adjustable non-diffractive beam direction disclosed by the present invention includes a radial waveguide, a coaxial feeder and a reconfigurable impedance surface structure, and also includes an adjustable device arranged in the reconfigurable impedance surface structure; The reconfigurable impedance surface structure is a periodic patch structure, and the reconfigurable impedance surface structure is divided into four reconstruction quadrants; the adjustable device is arranged in the reconstruction quadrant, between the patch gaps on the non-axis between. The present invention changes the states of switches of adjustable devices in different quadrants of the reconfigurable impedance surface structure by designing the reconfigurable impedance surface structure and setting different bias voltages for the reconfigurable impedance surface structure to realize real-time deflection of the beam direction. The reconfigurable The impedance surface has a simple structure and is suitable for non-diffraction beam transmission in different directions in the near field; it is widely used in wireless energy transmission, near-field detection, medical imaging, covert communication and other fields.

Description

technical field [0001] The invention relates to the field of microwave antennas, in particular to a reconfigurable Bessel antenna with adjustable non-diffraction beam direction. Background technique [0002] When electromagnetic waves propagate in space, diffraction will occur, and the beam will spread in space. If the transmitting antenna can transmit a non-diffraction electromagnetic beam, the beam will not spread within the transmission range, which will greatly improve the space transmission efficiency of the microwave. The propagation distance of the non-diffracting beam is limited, and its effective area is usually in the near-field area of ​​the antenna. Therefore, the use of non-diffracting beams for near-field microwave energy transmission, such as short-distance wireless charging of automobiles and electronic equipment, has attracted people's attention. There are many types of non-diffracting beams, such as Bessel waves, Mathieu waves, Vortex waves, Caleidoscopic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q23/00
CPCH01Q1/38H01Q1/50H01Q23/00
Inventor 卢萍黄卡玛杨晓庆
Owner SICHUAN UNIV