NON-CONTACT COMMUNICATION DEVICE AND ANTENNA RESONANCE FREQUENCY CONTROL METHOD

An antenna drive unit has: an oscillator capable of controlling an oscillating frequency; an output part for supplying high frequency signal obtained by the oscillator to an antenna resonance circuit; a controller for controlling the oscillating frequency of the oscillator and the antenna resonance...

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Bibliographic Details
Main Author KANNO Masayoshi
Format Patent
LanguageEnglish
Published 10.11.2016
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
TRANSMISSION
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Summary:An antenna drive unit has: an oscillator capable of controlling an oscillating frequency; an output part for supplying high frequency signal obtained by the oscillator to an antenna resonance circuit; a controller for controlling the oscillating frequency of the oscillator and the antenna resonance frequency of the antenna resonance circuit; and a phase detector for detecting a phase of output current or output impedance of the output part, wherein the oscillating frequency of the oscillator is controlled by the controller according to an operation mode, and also, the resonance frequency of the antenna resonance circuit is controlled by the controller based on the phase of output current or output impedance of the output part detected by the phase detector.
Bibliography:Application Number: US201515110257