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Conformal OAM antenna combined with Butler matrix feed network

A feed network and matrix technology, applied in the field of conformal OAM antennas, can solve the problems of low space utilization of conformal carriers and large space occupied by antennas, and achieve the effect of increasing space utilization and reducing space size

Active Publication Date: 2020-09-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the antenna occupies a large space in the vertical direction and the space utilization rate of the conformal carrier is low.

Method used

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  • Conformal OAM antenna combined with Butler matrix feed network
  • Conformal OAM antenna combined with Butler matrix feed network
  • Conformal OAM antenna combined with Butler matrix feed network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Depend on figure 1 As shown, the antenna array is attached to the inside of a conformal carrier and consists of 4 rectangular patches of flexible material. The radiating edge of the patch is parallel to the generatrix of the cylindrical carrier. For different carrier radii, the size of the patch is retrieved by looking up a table or the like.

[0022] Depend on figure 2 As shown, the present invention provides a 4×4. The Butler matrix includes 4 input ports, 4 output ports, 5 3dB directional couplers, 2 vertically symmetrical phase shifters with 30° phase shift characteristics, and 1 cross junction.

[0023] The input ends of the first directional coupler 51, the second directional coupler 52, and the third directional coupler 53 are matrix feed network input ports 1 to 4, and the output of the second directional coupler 52, the third directional coupler 53 The terminals are respectively connected to the cross junction 7 and the input ends of the first phase shifte...

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PUM

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Abstract

The invention discloses a conformal OAM antenna combined with a Butler matrix feed network. The conformal OAM antenna is composed of a uniform circular array located at one side of the inner wall of acylinder and a 4 * 4 Butler matrix feed network located at the other side of the inner wall of the cylinder, and the Butler matrix is based on a microstrip transmission line and is composed of five directional couplers, a cross junction and two phase shifters. The uniform circular array is composed of four flexible conformal rectangular patches, and the buses of the cylinders are parallel to theradiation edges of the patches and are perpendicular to the non-radiation edges. In order to reduce the influence of conformity as much as possible, the size of the flexible patch array in a flattenedstate is obtained through a table look-up method and the like on the basis of a non-common structure. The performance characteristics of the conformal OAM antenna are THE cylindrical adaptability, integrated design and broadband characteristics of three-mode OAM waves. Under the condition that no extra switch is added, the conformal OAM antenna has the capability of simply switching OAM waves ofthree modes.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a conformal OAM antenna combined with a Butler matrix feeding network. Background technique [0002] Vortex waves carrying orbital angular momentum (OAM) can improve spectral efficiency, and their corresponding antenna systems can meet the ever-increasing demand for communication capacity in wireless networks. [0003] The Uniform Circular Array (UCA) antenna is a method of generating OAM waves. By changing the phase difference relationship between the array elements, electromagnetic waves of different OAM modes can be generated. Conformal antennas are non-planar antennas whose profile follows the shape of the carrier. Designing conformal antennas combined with high-speed carriers such as airplanes and trains can effectively use space without affecting the aerodynamic characteristics of the carrier. [0004] Butler network is a passive equal power distribution ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q3/34H01Q21/00H01Q1/08
CPCH01Q1/50H01Q3/34H01Q21/0006H01Q1/085
Inventor 胡俊杨景吴文赵润哲胡燕金
Owner NANJING UNIV OF SCI & TECH
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