Method for controlling label identification range of ultrahigh-frequency near-field RFID system

Abstract

The invention relates to a method for controlling a label identification range of an ultrahigh-frequency near-field RFID system. The method for controlling the label identification range of the ultrahigh-frequency near-field RFID system comprises the following steps that a non-near-field antenna or a combination of non-near-field antennas is adopted for being connected with an ultrahigh-frequencyRFID reader as a feed source; with a half-wavelength conductor as a basic structure unit, the feed source is used for exciting the basic structure unit, and an effective identification range of the ultrahigh-frequency RFID system is formed on the periphery of the half-wavelength conductor, wherein the effective identification range is used for identifying an ultrahigh-frequency near-field RFID label. By adopting the method for controlling the label identification range of the ultrahigh-frequency near-field RFID system, the identification range of an electronic label can be precisely controlled.

Description

technical field

[0001] The invention relates to a method for controlling the tag identification range of an ultra-high frequency near-field RFID system. Background technique

[0002] The development of the Internet of Things is changing with each passing day, and UHF RFID (Radio Frequency Identification, Radio Frequency Identification) technology, which is the cornerstone of the Internet of Things, is moving from the large-package electronic tags and pallet electronic tags of items to single-item electronic tags. However, in actual use, UHF RFID item tags are either missed or misread, and it is always difficult to obtain a satisfactory recognition rate. This is because UHF RFID technology is based on the radiation principle of electromagnetic field. The surrounding environment will repeatedly reflect and refract the electromagnetic field, as well as the influence of liquid and metal on the matching performance of the tag antenna. In addition, due to the combination of facto...

Examples

Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

technical field

[0001] The invention relates to a method for controlling the tag identification range of an ultra-high frequency near-field RFID system. Background technique

[0002] The development of the Internet of Things is changing with each passing day, and UHF RFID (Radio Frequency Identification, Radio Frequency Identification) technology, which is the cornerstone of the Internet of Things, is moving from the large-package electronic tags and pallet electronic tags of items to single-item electronic tags. However, in actual use, UHF RFID item tags are either missed or misread, and it is always difficult to obtain a satisfactory recognition rate. This is because UHF RFID technology is based on the radiation principle of electromagnetic field. The surrounding environment will repeatedly reflect and refract the electromagnetic field, as well as the influence of liquid and metal on the matching performance of the tag antenna. In addition, due to the combination of facto...

Examples

Embodiment Construction

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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