Fractal Dual-Band Ceramic Antennas for RFID Systems

Abstract

The invention discloses a fractal double-frequency band ceramic antenna used for a radio frequency identification system, which relates to a microstrip antenna. The invention provides a fractal double-frequency ceramic antenna used for a radio frequency identification system which has small size, capability to work in a double frequency band, large bandwidth, lower return loss and omnidirectional radiation characteristic; the antenna is provided with a ceramic base plate, both surfaces of which are plated with silver layers, wherein the plated silver layer at one surface is a fractal antenna radiation patch and the plated silver layer at the other surface thereof is a completely plated silver layer which is an antenna grounding layer; the fractal antenna radiation patch is provided with a rectangular main patch and a rectangular branch patch, wherein the branch patch is provided with at least two classes of branch patches; the first class of branch patches is provided with four branch patches and the number of the following class of branch patches is three times of the previous class of branch patches; one angle of each branch patch of the following branch patch is connected with one angle of each branch patch of the previous class of branch patches, and the other three angles of each branch patch of each class of branch patches are connected with one angle of each branch patch of the following class of branch patches; the main patch is provided with an antenna feeding point.

Description

technical field [0001] The invention relates to a microstrip antenna, in particular to a fractal dual-band ceramic antenna for a radio frequency identification system. Background technique [0002] RFID is the abbreviation of Radio Frequency Identification in English. Radio frequency identification technology is a non-contact automatic identification technology realized by radio frequency communication that emerged in the 1990s. RFID tags have the characteristics of small size, large capacity, long life, and reusability. They can support fast reading and writing, non-visual identification, mobile identification, multi-target identification, positioning and long-term tracking management. Combined with other technologies, it can be used in logistics, manufacturing, public information services and other industries to achieve efficient management and operation and reduce costs. With the continuous improvement and maturity of security soft information-related technologies, the ...

AI Technical Summary

Problems solved by technology

At present, the combination of ceramic substrate and fractal antenna to achieve dual-band work, and the application of the two working frequency bands of 2.4-2.4835GHz and 5.725-5.875GHz in the RFID system has not been reported.

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