AN78010 - NXP.com
AN78010 - NXP.com
AN78010 - NXP.com
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Philips Semiconductors Rev. 1.0 November 200213.56 MHz RFID Proximity Antennas mifare ® (14443A)Figure 6 shows the relation between the time and the frequency domain of the load modulation. Due to the1data rate of v ≈ 106kBd≈ the Manchester code generates sidebands at both sides of the sub9.44μscarrier frequency:f = 847 .5kHz± 106kHzmSUBSubcarrierDataThe modulated sub carrier then generates sidebands at both sides of the carrier frequency:f = 13 .56MHz± 847.5kHz± 106kHzmRCarrierSubcarrierDataFigure 6: Principle of Data Coding PICC PCD, Time and Frequency Domain10 PUBLIC