1. Proximity Reader Antenna:
Proximity Antenna Training for MHz
Proximity Reader Antenna:
Design Example

2. EMC-Filter + Impedance Matching to 700 (given parameters)RX
AVSS
TX1
TX2
TVSS
VMID
RC 500
RC 400
Rx-Circuit:
R1 = 2,2 k
R2 = 820 
C3 = 15 pF
C4 = 100 nF R 1 2 C 4 3
Rx-Circuit
Z  700 Ohm
Tx-Circuit:
L0 = 1 H
C0 = 136 pF C L
GND
Tx-Circuit

3. Antenna Coil
= open
= short

4. Antenna Coil La Lb RCoil Results of the measurement
@13.56 MHz!
Results of the measurement
(impedance analyser or L-C-R Meter):

5. Calculation

6. Calculation

7. Calculation

8. Calculation
Due to the measurement uncertainty this value maybe not accurate.
(Probably the exact value is lower!) Check the Q-factor!!!

9. Tuning
C2a
C1a
C1b
C2b

10. Result
See the Training!!!