Antenna for remote tag identification

Abstract

The invention discloses an antenna for remote tag identification. The antenna comprises a first butterfly antenna coil, a second butterfly antenna coil and a rectangular antenna coil. The first butterfly antenna coil, the second butterfly antenna coil and the rectangular antenna coil are connected to a signal source through a first antenna impedance matching circuit, a second antenna impedance matching circuit and a third antenna impedance matching circuit respectively and are all connected to an antenna switching control circuit. The antenna switching control circuit is used for switching among the first butterfly antenna coil, the second butterfly antenna coil and the rectangular antenna coil to enable the first butterfly antenna coil, the second butterfly antenna coil and the rectangular antenna coil to radiate energy to the space in turns. By the antenna, the requirement of remote identification of 13.56MHzRFID tag information can be met, and special application in the field of public security to densely populated places can be realized.

Description

technical field [0001] The invention relates to the field of RFID technology, in particular to an antenna for long-distance reading tags. Background technique [0002] Many violent terrorist incidents in recent years have shown that places with a high density of people, such as subways, buses, and train stations, have become the first choice for terrorist attacks. However, at present, the security check methods for passengers’ identities in these places are still relatively limited, and the police mainly use ordinary handheld or desktop second-generation resident ID card readers to conduct spot checks on the spot. The main disadvantage of these types of readers is that they can read The short distance and small scope have led to problems such as low security inspection efficiency, a small proportion of inspection personnel, and a heavy burden on the police. From time to time, large-scale personnel are stranded or suspicious personnel are missed. Contents of the invention ...

AI Technical Summary

Problems solved by technology

However, at present, the security check methods for passengers’ identities in these places are still relatively limited, and the police mainly use ordinary handheld or desktop second-generation resident ID card readers to conduct spot checks on the spot. The main disadvantage of these types of readers is that they can read The short distance and small range lead to problems such as low security inspection efficiency, small proportion of inspection personnel, and heavy burden on the police. Sometimes large-scale personnel are stranded or suspicious personnel are missed.

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