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A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients

A technology of dipole antenna and dielectric constant, which is applied in the direction of resonant antenna, mid-position feed between antenna endpoints, radiating element structure, etc., to achieve the effect of simple manufacturing process, large bandwidth and small size

Inactive Publication Date: 2009-09-16
XIAMEN UNIV
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  • Abstract
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Problems solved by technology

[0008] At present, there is no report on the related technologies that combine tree-like fractal patches, dipole antennas, and ceramic substrate materials with gradually changing dielectric constants and apply them in the 0.902-0.928GHz working frequency band in RFID systems.

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  • A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients
  • A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients
  • A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0019] see figure 1 , the present invention is provided with a ceramic substrate 1 with a silver-plated layer on one side. The silver-plated layer is a radiating patch of a tree-like fractal dipole antenna. The pole arms 21 and 22 are formed, and the two dipole arms 21 and 22 are a second-order fractal patch structure. The ceramic substrate 1 is composed of nine rectangular ceramic material layers with gradually changing dielectric constants. The dielectric constant of each layer of ceramic material layer changes linearly with equal difference. The dimensions of each ceramic material layer are the same, the length is 26mm±1mm, the width is 12mm±1mm, and the thickness is 0.1mm±0.01mm. The dielectric constant of the first ceramic material layer is 12, the dielectric constant of the second ceramic material layer is 13, the dielectric constant of the third cer...

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Abstract

A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients relates to a dipole antenna. The invention provides a ceramic tree fractal dipole antenna with gradually changing dielectric coefficients, which has a small size, large bandwidth, low return loss and omnidirectional radiation characteristics. The antenna is provided with a ceramic base plate with one surface coated with silver, and the silver coating is a tree fractal dipole antenna radiation patch. The ceramic base plate is composed of at least nine ceramic material layers with gradually changing dielectric coefficients, and the dielectric coefficient of each ceramic material layer changes arithmetically and linearly. Each ceramic material layer is preferably a rectangular ceramic material layer. The ceramic material layers are in the same size, and have of a length of 26(+ / -)1mm, a width of 12(+ / -)1mm and a thickness of 0.1(+ / -)0.01mm. The antenna has a small size, large bandwidth, good radiation characteristic, simple manufacturing technology, low cost and excellent omnidirectional radiation performance, and is simply structured and easily integrated. The antenna can meet the specific requirements on the antenna in an RFID application system.

Description

technical field [0001] The invention relates to a dipole antenna, in particular to a dielectric constant gradient ceramic tree fractal dipole antenna. Background technique [0002] RFID radio frequency identification technology is a non-contact automatic identification technology realized by radio frequency communication that emerged in the 1990s, and has achieved a series of results in recent years. Among them, some achievements have begun to be applied in many fields, and will become another new generation technology that affects the global economy and human life after mobile communication technology and Internet technology. From a long-term point of view, this technology is closely integrated with the Internet, communication and other technologies, and applied to many industries such as logistics, manufacturing, and public information services, which can realize efficient management and operation, and further enhance the high-tech content. [0003] Antenna design and man...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q9/28
Inventor 游佰强林斌周建华熊兆贤郑建森徐伟明
Owner XIAMEN UNIV
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