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Dual-frequency microstrip slot antenna

A microstrip slot and microstrip line feeding technology, applied in antennas, antenna grounding devices, antenna support/mounting devices, etc., can solve the problems of increasing system complexity and volume, achieve good radiation characteristics, and simple antenna structure , the effect of good performance

Inactive Publication Date: 2019-05-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the rapid development of the Internet of Things, for a highly integrated RFID system, a system usually needs to be compatible with multiple frequency bands. If each frequency band corresponds to an antenna, it will inevitably increase the complexity and size of the system.

Method used

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Embodiment Construction

[0021] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0022] The present invention proposes a dual-frequency microstrip slot antenna, such as figure 2 shown. The antenna structure includes dielectric substrate, radiation patch, microstrip feeder and reference ground. The dielectric substrate is an FR4 plate with a thickness of 1.32mm, a size of 48mm×47mm, a relative permittivity εr=4.4, and a loss tangent tanδ=0.025. The upper surface of the dielectric substrate is a 50Ω micro...

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Abstract

The invention relates to a dual-frequency microstrip slot antenna. A feeding mode is 50omega microstrip line feeding at the bottom. The antenna comprises a radiant metal patch located on a top layer and a ground plate metal layer located on a bottom layer; a medium layer is provided between the radiant metal patch and the ground plate metal layer. The antenna is characterized in that the radiant metal patch is a rectangular radiant metal patch with two F-shaped grooves and one H-shaped groove; and a rectangular patch with a pore-digging structure is adopted by the ground plate metal layer. Thedual-frequency microstrip slot antenna has the beneficial effects that 1, miniaturization and dual band requirements are implemented in the antenna provided by the invention; 2, a double-frequency working band is implemented because the two F-shaped grooves are used by the antenna; 3, the bandwidth is broadened in the antenna through the H-shaped groove and modification of the bottom-layer groundplate; and 4, the whole antenna structure is very simple and suitable for a hand-held RFID (Radio Frequency Identification Device) reader.

Description

technical field [0001] The invention relates to a dual-frequency microstrip slot antenna, which belongs to the technical field of wireless communication. Background technique [0002] Radio Frequency Identification (RFID) is a new automatic identification technology developed in the 1980s. Radio frequency identification technology is a technology that uses radio frequency signals to achieve contactless information transmission through spatial coupling (alternating magnetic field or electromagnetic field) and achieves identification purposes through the transmitted information. It is widely used in identity documents and access control, supply chain and inventory tracking. , Car toll collection, anti-theft, production control, asset management. In the future, the rapid development of RFID technology is of great significance to the field of Internet of Things. [0003] A basic RFID system consists of two components, an RFID transponder and reader. The reader antenna emits a...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q5/20H01Q5/307H01Q1/22
Inventor 卢勇杰单志勇刘忠利
Owner DONGHUA UNIV
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