OAM generator based on parabolic reflector and circular-ring-shaped array feed source

A parabolic reflector, circular array technology, applied to loop antennas, electrical components, circuits, etc., can solve problems such as short distances, and achieve the effects of enhancing directivity, increasing antenna gain, and reducing opening angle.

Inactive Publication Date: 2015-01-14
YUNNAN UNIV
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  • Claims
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Problems solved by technology

This makes the effective transmission distance of OAM RF beams shorter than that of ordinary RF beams

Method used

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  • OAM generator based on parabolic reflector and circular-ring-shaped array feed source
  • OAM generator based on parabolic reflector and circular-ring-shaped array feed source
  • OAM generator based on parabolic reflector and circular-ring-shaped array feed source

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Embodiment Construction

[0018] Such as figure 1 Shown is the basic structure of an OAM generator based on a parabolic reflector and an annular array feed source in the present invention, which is composed of a feed source, a reflector and a supporting mechanism. As an implementation example, we set the aperture angle of the reflector to 120°, and the aperture radius to the working wavelength 5 times as large.

[0019] figure 2 Shown is the structure of the feed source in this implementation example, we make it work in the 5.4GHz wifi frequency band, the working wavelength is 56.6mm, so all dimensions in the figure are in mm. In addition, since the patch antenna has structural advantages such as light weight, small size, low profile, easy shaping and integration, it is a type of microwave antenna that is widely used at present, so the array element of the circular ring array feed source in this implementation example A patch antenna is used. in, figure 2 (a) is the top view of the feed array...

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Abstract

The invention relates to an OAM generator based on a parabolic reflector and a circular-ring-shaped array feed source. The OAM generator shown in the picture (a) is composed of the circular-ring-shaped array feed source, the rotary parabolic reflector and a supporting mechanism. A structure of the circular-ring-shaped feed source is shown in the picture (b) and used for generating an original OAM radio frequency wave beam, N array elements distributed at equal intervals along the circumference are utilized, the stimulation amplitudes of the array elements are equal, and phases are shown in the mode shown in the specifications, wherein n represents the serial number of the array elements, l represents an OAM mode, a spiral phase item in the shape shown in the specifications can be formed in an array factor of the feed source, and an OAM radio frequency wave beam with the pattern number being l can be generated. When the OAM mode of the generator during working needs to be adjusted, only the phase relation among various array element currents needs to be reset. The rotating parabolic reflector is used for improving the quality of the OAM radio frequency wave beam and can narrow the OAM radio frequency wave beam, directionality and radiation gains can be improved, and the transmission distance of an OAM radio frequency carrier is increased. The OAM generator based on the parabolic reflector and the circular-ring-shaped array feed source can be applied to a wireless communication system, and compared with the existing wireless technology, the system capacity and the spectrum effectiveness can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an OAM generator based on a parabolic reflector and a circular array feed source, which is mainly used for generating various modes of OAM radio frequency beams. Background technique [0002] With the transfer of wired access to wireless access, how to efficiently use radio spectrum resources has become the key to the development of mobile services. In order to improve spectrum efficiency, IEEE established standard working groups such as 802.22, 802.16h and P1900 for dynamic spectrum access in 2004 and 2005 respectively. The multiplexing technology allows multiple signals to be integrated on the same transmission path (such as: carrier frequency), which is a key technology to improve spectral efficiency. The development of multiplexing technology has gone through several stages such as frequency division (FDM), time division (TDM), code division (CDM), space divisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q7/00H01Q19/12
Inventor 毛福春黄铭李廷华
Owner YUNNAN UNIV
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