NFC Antenna Design, Adjustment of Resonant Frequency, Sensor Network Module

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Contract design of NFC Reader/Writer antenna peripheral circuit

Reference document："AN11740 PN5180 Antenna design guide" Rev. 1.0　p.30　4.2.1.4

"Measured" value
　La=1533nH
　Cpa=0.1pF
　Rcoil=3Ω　⇒ 2.5Ω

Preset value
　Q=25
　Rmatch=20Ω
　L0=470nH
　Co=124pF=56pF+68pF


◇◇◇　Calculation result　◇◇◇

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NFC Small antenna experiment（２）

　NFC Reader/Writer antenna size : 8mm×6mm
　Tag antenna size : 8mm×6mm
「NFC Small antenna experiment（２）」

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Topics

　Feb. 07, 2016　Technical Discussion : Measurement of coupling coefficient
　Feb. 05, 2016　News　:　AutoID & Communication EXPO.Osaka - Catalogue exhibition -
　Dec. 20, 2015　Products News : NFC Antenna Designer Demo Ver. 0.1
　Nov. 21, 2015　Technical Discussion : Verified the circuit equations by Spice simulation.
　Nov. 08, 2015　Technical Discussion : Antenna size of Reader/Writer
　Oct. 22, 2015　Technical Discussion : Electromagnetic induction, Induced electromotive force
　Oct. 08, 2015　Technical Discussion : Resonant frequency of the NFC tag
　Oct. 02, 2015　Technical Discussion : Circuit equations of the equivalent circuits
　Oct. 01, 2015　Technical Discussion : Equivalent circuits of the NFC system
　Oct. 01, 2015　Released the homepage.
　Aug. 26, 2015　Moved the office to Kyoto Research Park.

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