Appendix - RFID: Fundamentals and Applications in Contactless Smart Cards and Identification - page 403

The layout of the test card is available to download from the author's homepage
(http://rfid-handbook.de/downloads) as a Postscript or Gerber file.

14.4.2 Field generator coil
The layout depicted shows the field generator coil described in Section 9.2.4. This
coil is however also excellently suited for use as an antenna in the frequency range of
13.56MHz.
Table 14.1 Jumper position for setting the supported modulation procedures

Jumper setting ∗ Jp1 Jp2 Jp3 Jp4 Jp5 Jp6 Jp7 Jp8 Jp9

Don't transmit — — 3.3 — — — — — —

Manchester 1111 1.3 2.2 3.3 Down — — — — —

Manchester 1010 1.3 2.1 3.3 Down — — — — —

BPSK 1111 ∗∗ 1.3 2.3 3.3 — — — — — —

BPSK 1010, Phase 0 ◦ 1.2 2.3 3.3 — Right — — — —

BPSK 1010, Phase + π/ 2 1.2 2.3 3.3 — Left — — — —

BPSK external data, phase 0 ◦ 1.1 2.3 3.1 Down Right — — — —

BPSK external data, phase + π/ 2 1.1 2.3 3.1 Up Left — — — —

R-modulation — — — — — Off Off Right Down

C-modulation — — — — — On On Left Up

∗ The card is held such that the antenna is to the right.
∗∗ Subcarrier unmodulated.

Table 14.2 Parts list for test chip card

Component Value/type Comment

C1 22 pF —

CV1 6-60 pF Adjusting of the transponder resonant

frequency

C2 100 pF —

7C3 10 nF —

C4 10 pF Modulation capacitor

C5 10 pF Modulation capacitor

R1 4.7 —

R2 4.7 k —

R3, R4, R5, R6 1M —

R7 10 Shunt resistor during C-modulation

R8 470 Shunt resistor during R-modulation

R9 1-1.8k Modulation resistor

D1, D2, D3, D4 BAR42 —

D5 3V8 Zenor diode

L1 ∼ 3 . 5 µ H Conductor loop in the layout

U1 74HC4040 Asynchronous 12-bit binary counter

U2 74HC74 Dual D flip-flop

U3 74HC00 4 × NAND

U4 74HC03 4 × NAND, Open Collector