Switchable antenna of near and far field RFID reader-writer, and design method of thereof

A near-far-field, reader-writer technology, applied in antennas, antenna arrays, antenna components, etc., can solve the problems of inability to realize multiple uses of near-far fields, high application costs, and single antenna working mode, so as to avoid impact , reduce application cost, increase the effect of reading distance

Pending Publication Date: 2017-11-21
江苏智周万物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the working mode of the antenna is single, the application cost is high, and it cannot realize multiple uses in the near and far fields.

Method used

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  • Switchable antenna of near and far field RFID reader-writer, and design method of thereof
  • Switchable antenna of near and far field RFID reader-writer, and design method of thereof
  • Switchable antenna of near and far field RFID reader-writer, and design method of thereof

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] Below in conjunction with specific embodiment, further illustrate the present invention. These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "installation" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection...

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PUM

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Abstract

The invention discloses a switchable antenna of a near and far field RFID reader-writer, and a design method of thereof. The antenna is an antenna of a double-faced microstrip line feed network structure and comprises two feed ports used for switching near and far field working modes, a dipole array structure, metal through holes, an integrated resistor and a dielectric substrate; the dipole array structure comprises a square ring composed of four dipole antennas, wherein each dipole antenna is separately fed by a 1 / 4 impedance transformation structure; six metal through holes are formed, wherein four metal through holes are separately connected with the dipole array structure through the double-faced microstrip line feed network structure (QDSPSL), and the other two metal through holes are welded with a coaxial feed inner core; and the integrated resistor is integrated with the feed port in a far field working mode and is used for realizing broadband impedance matching of the antenna in the far field working mode. According to the switchable antenna disclosed by the invention, the working mode of the RFID reader-writer antenna is switched through the feed point position, the single working mode of the traditional antenna is overcome, and the application cost can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of electromagnetic field microwave and technology, in particular to a switchable antenna applied to a near-far field RFID reader-writer and a design method thereof. Background technique [0002] Radio Frequency Identification (RFID) technology is an automatic identification technology that conducts non-contact two-way data communication through radio frequency to identify targets and obtain relevant information. The working frequency of radio frequency identification includes low frequency (135KHz), high frequency (13.56MHz), ultrahigh frequency (860MHz~960MHz) and microwave frequency above 2.4GHz, among which high frequency and ultrahigh frequency are the most widely used. The reader antenna plays an irreplaceable role in the radio frequency identification system. In recent years, with the introduction of item-level RFID applications, more and more attention has been paid to UHF RFID systems using near-field couplin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q23/00H01Q1/22H01Q1/36H01Q1/50
CPCH01Q1/2216H01Q1/36H01Q1/50H01Q21/0006H01Q23/00
Inventor 何小祥杨阳郑景明
Owner 江苏智周万物科技有限公司
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