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Low Frequency Communication Antenna with Varying Radiation Field

A communication antenna and radiation field technology, which is applied in antennas, antenna combinations with different interactions, antenna arrays, etc., can solve the problems of inability to ensure that user tags can be read, high cost, etc.

Active Publication Date: 2020-10-27
BEIJING JINRI TIANHONG MEDICAL DEVICES MANUFACTUING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, for the convenience of the user, the reading and writing area is relatively large and the user does not need to check in at a fixed point. If more antennas are distributed in this area, the cost will be greater, and if there are fewer antennas, the reading and writing system will not be able to It is guaranteed to maintain a strong magnetic field strength in this area, and there can only be strong signals at certain points. Since users are mobile, it cannot be guaranteed that user tags in the area can be read

Method used

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  • Low Frequency Communication Antenna with Varying Radiation Field
  • Low Frequency Communication Antenna with Varying Radiation Field

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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0022] In one embodiment, the low-frequency communication antenna with changing radiation field may include: a three-component antenna and a controller. The low-frequency communication antenna can be used in a reading and writing system to realize communication with RFID tags and th...

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Abstract

The invention provides a low frequency communication antenna with a varying radiation field. The antenna comprises three component antennas and a controller. Each component antenna comprises a controllable gain amplifier and a coil. The gain multiple of the controllable gain amplifiers of three component antennas is controlled and adjusted by the controller. Due to the positional relationship of the coils of three component antennas, the radiation angles of three antennas are different. According to the low frequency communication antenna with the varying radiation field, the direction and intensity of the radiation field of the antenna are adjustable.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a low-frequency communication antenna with a changing radiation field. Background technique [0002] At present, RFID (Radio Frequency Identification) technology has been widely used. After the tag enters the magnetic field emitted by the antenna of the reading and writing system, it can communicate with the reading and writing system through radio frequency, so that corresponding data transmission and recording can be carried out. For example, a user can wear an electronic tag card, and the reading and writing system can determine that he has been to a certain reading and writing area by reading the electronic tag card. In some cases, for the convenience of the user, the reading and writing area is relatively large and the user does not need to check in at a fixed point. If more antennas are distributed in this area, the cost will be greater, and if there are fewer antennas, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q7/00H01Q21/00H01Q21/29
CPCH01Q1/36H01Q7/00H01Q21/00H01Q21/0006H01Q21/29
Inventor 钮云超
Owner BEIJING JINRI TIANHONG MEDICAL DEVICES MANUFACTUING CO LTD