Liquid RFID antenna and manufacture method thereof

Abstract

The invention provides a liquid RFID antenna comprising at least a loop antenna portion and a liquid metal antenna portion. The loop antenna portion is disposed on a first dielectric substrate. The loop antenna portion includes an inner loop antenna portion and an outer loop antenna portion. The liquid metal antenna portion is disposed in a second dielectric substrate. An interface between the inner loop antenna portion and the outer loop antenna portion on the first dielectric substrate is electrically connected to an electronic chip. The application provides a new mode for cyclic wire arrange in combination with the liquid metal antenna, expands the compatibility of RFID in multiple occasions, satisfies the electrical performance of the antenna while ensuring the soft characteristics, and provides an ingenious backup improvement scheme to greatly improve the satisfaction of the RFID in different scenarios.

Description

technical field [0001] The invention belongs to the field of wireless communication antennas, and more specifically relates to an RFID antenna made of liquid metal. Background technique [0002] Radio Frequency Identification (RFID) technology is a non-contact communication technology that can identify specific targets and read and write data through wireless communication. Wide range of UHF RFID frequency band standards adopted worldwide include Chinese standards (840-844.5MHz and 920.5-924.5MHz), American standards (902-928MHz) and European standards (866-869MHz). The RFID tag antenna that must be used in the communication process is an important part of the RFID system, and its performance will directly affect the efficiency and quality of the entire RFID system. [0003] However, due to the inherent characteristics of RFID antennas: thin body, complex internal structure, diverse use occasions, difficult impedance matching, insufficient gain and many other characteristic...

AI Technical Summary

Problems solved by technology

At this time, the use of liquid antennas gave technicians a lot of room for imagination. Liquid metal antennas have good tensile properties and have received extensive attention in research and practical applications. However, the biggest problem is that liquid metal RF antennas are stretched. In the process, its operating frequency is unstable and its controllability is poor. It is still difficult to design a liquid antenna that can be stretched and its resonance frequency can be adjusted.

Therefore, although liquid antennas have repairability and complex communication applications that traditional antennas do not have, most of them are still in the laboratory, and there are very few applications.

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