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Novel leaky cable for Internet of things application

An Internet of Things, a new type of technology, applied in leaky waveguide antennas, antenna supports/installation devices, electrical components, etc., can solve the problems of small coupling loss, low radiated energy, unable to meet the normal working environment, etc., and achieve high coupling loss. Effect

Active Publication Date: 2017-03-08
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] At present, the existing leaky cable is used in the field of communication, which has small coupling loss and low radiation energy. When it is directly applied to the UHF Internet of Things system, its effective reading distance for passive RFID tags can only reach a few centimeters, which cannot meet Normal working environment needs

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  • Novel leaky cable for Internet of things application
  • Novel leaky cable for Internet of things application
  • Novel leaky cable for Internet of things application

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specific Embodiment

[0036] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference image 3 This sub-invention proposes a structure diagram of Example 1 of a leaky coaxial cable with high coupling loss, which specifically includes an inner conductor 1, a dielectric layer 2, an outer conductor 3, an insulating protective layer 4, and a continuous gap 5 in the center of the outer conductor. Side periodic gap 6.

[0038] This structure is a periodic structure, designed as a UHF IoT RFID antenna, so the working center frequency is 915MHz. According to the formula:

[0039]

[0040] Where λ 0 Is the central working wavelength, here is 329mm; ε r Is the relative permittivity of the medium between the inner and outer conductors. Therefore, the value range of the period P in the UHF IoT RFID wor...

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Abstract

The invention discloses a novel leaky cable for an Internet of things application. The novel leaky cable comprises an inner conductor, a dielectric layer, an outer conductor, an insulating protective layer which are orderly arranged from an inner layer to an outer layer. The outer conductor is provided with continuous slots along an axial direction, and two sides of the continuous slots are provided with periodic slots. The continuous slots are wavy bend slots or straight line type slots, and the periodic slots at two sides of the continuous slots are mutually staggered. The periodic slots are single triangular slots or combined slots of multiple triangular slots, and the periodic slots are L-shaped or U-shaped slots. The novel leaky cable is suitable for an Internet of things RFID sensing application and has high coupling loss. As an ultra-high frequency (UHF) networking antenna, the high coupling loss leaky coaxial cable has the advantages that large radiation energy can be provided, and thus a label is remotely activated to achieve the purpose of reading.

Description

Technical field [0001] The invention relates to a leaky coaxial cable, in particular to a new type of leaky cable facing the application of the Internet of Things. Background technique [0002] In recent years, some new and urgent application requirements have emerged in the RFID and sensor application fields of the Internet of Things. These requirements are manifested in two aspects: 1) Ultra-high frequency (UHF) IoT antennas are required to cover and only cover a designated area; 2) Passive UHF RFID tags and passive sensors are required to be integrated to form passive RFID / Sensor, to realize the recognition of objects in a specific area and the perception of object environment information. When this area is a narrow and long area, such as the items on the first floor of a long row of storage shelves and the monitoring of temperature and humidity, the management of products on a production line of industrial production, the signs and the temperature of each plant of a row of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/20H01Q1/22
CPCH01Q1/2208H01Q13/20
Inventor 蒋进军王璐王刚
Owner UNIV OF SCI & TECH OF CHINA
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