Non-contact type antenna impedance measuring method and measuring system thereof

Abstract

The invention discloses a non-contact type antenna impedance measuring method and a measuring system thereof. The measuring method comprises the following steps: (1), electrically connecting an antenna, an adjustable device and a chip to form the measuring system; (2), putting the measuring system in a reading distance range of an ultra-high-frequency RFID system; (3), changing the impedance of the adjustable device for three times, and separately recording starting power and corresponding frequencies of reader labels by adopting ultra-high-frequency RFID software; and (4), carrying out data processing calculation by utilizing impedance which is acquired through measurement for three times and consists of the starting power of the reader label, the impedance of the adjustable device and the chip so as to acquire impedance of the antenna under specific frequency. The non-contact type antenna impedance measuring method disclosed by the invention has the advantages of being simple, convenient and quick in measurement operations, high in measurement efficiency and high in measurement accuracy.

Description

Technical field [0001] The invention relates to the technical field of radio frequency identification and antennas, in particular to a non-contact antenna impedance measurement method and a measurement system thereof. Background technique [0002] RFID technology completes communication through radio frequency signals, and can obtain and identify related information of objects without physical contact with the object. It has the advantages of long sensing distance, high recognition accuracy, fast reading speed, and large amount of information storage. It is widely used Used in industrial production, transportation, logistics and other fields. With the development and improvement of RFID technology, RFID technology has shown great application potential and application scenarios have become more diverse. [0003] In the antenna performance research, impedance matching is very important. In actual tests, whether the antenna meets impedance matching depends on the measurement of its i...

AI Technical Summary

Problems solved by technology

At present, the common antenna impedance measurement method is that the antenna is connected to the measuring instrument through a feeder, and the measuring instrument measures the antenna impedance, but there are often disadvantages that the signal passes through the feeder and insufficient calibration leads to a large deviation between the measurement result and the actual result, especially for Electrically small antennas, errors due to measurement fixtures will become more severe

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