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Tutorial: Radio Basics for UHF RFID--Part III

Here is Part III of Chapter 3--Radio Basics For UHF RFID--from The RF in RFID: Passive UHF RFID in Practice. Written for the electrical engineer but not the RFID expert, Dr. Dobkin explains what to expect, develop, and use while implementing an RFID system.

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RFID World

A periodic signal that persists indefinitely, without changing its amplitude, frequency, or Phase--a continuous wave (CW) signal--carries no information other than the fact that it is present. In order to convey data, a signal needs to change. We normally think of this change as a relatively slowly changing variation--modulation--imposed on the periodic signal.

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