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Antenna Tuning Details

www.ti.com

and

show actual measurements on TRF7960TB module for high and lower Q value

tuning solutions.

Figure 12. Higher Q Antenna Measurement Plots with Calculated Values (Q = ~20)

Figure 13. Lower Q Antenna Measurement Plots with Calculated Values (Q = ~10)

TRF7960TB HF RFID Reader Module

SLOU297 – October 2010

Содержание TRF7960TB

Страница 1: ...TRF7960TB HF RFID Reader Module User s Guide Literature Number SLOU297 October 2010...

Страница 3: ...rs Board 10 8 DK LM3S9B96 EM2 TRF7960R ARM Cortex M3 Development Board 12 9 Quick Start 13 10 Base Application Firmware 13 11 Platform Specific Details 13 12 Mechanical Physical Information 14 13 Ante...

Страница 4: ...ation RPAR 1 3 k 16 9 Smith Chart Simulation RPAR 680 16 10 Theoretical Parallel Resistor Value for Desired Q 17 11 Theoretical Capacitance Values for Resonance at Desired Q 17 12 Higher Q Antenna Mea...

Страница 5: ...IC family as those details are documented in the data sheets for those parts along with application notes that can be found on the product pages see hyperlinks in Section 3 3 References TRF7960 produ...

Страница 6: ...for design and development of ultralow power high frequency HF RFID systems The module has an onboard boost converter TPS61222DCKT which boosts 3 3 VDC to 5 VDC out to TRF7960 IC for 23 dBm full tran...

Страница 7: ...to 60 kHz 10 EN Chip enable input If EN 0 then chip is in power down mode 11 N C No connection Pulse enable and selection of power down mode If EN2 is connected to VIN then VDD_X is active 12 EN2 duri...

Страница 8: ...PS61222DCKT for generation of 5 VDC 10 N C No connection 11 N C No connection 12 N C No connection 13 N C No connection 14 N C No connection 15 N C No connection 16 N C No connection 17 N C No connect...

Страница 9: ..._2 19 I O_1 18 MOD 14 VSS 10 I O_0 17 SYS_CLK 27 VSS_D 29 RX_IN2 9 RX_IN1 8 VDD_X 32 VSS_A 15 OSC_OUT 30 VSS_PA 6 TX_OUT 5 OSC_IN 31 VDD_RF 3 DATA_CLK 26 IRQ 13 VSS_RX 7 ASK OOK 12 EN2 25 VIN 2 VDD_A...

Страница 10: ...he Experimenter Board helps designers quickly learn and develop using the new F5xx MCUs which provide the industry s lowest active power consumption more memory and leading integration for application...

Страница 11: ...ections for Monitoring SPI Communications Between MSP430F5438A and TRF796x on TRF7960TB Module Figure 5 Firmware Development Debug Setup for MSP EXP430F5438 Experimenters Board 11 SLOU297 October 2010...

Страница 12: ...llaris microcontroller based target board The development kit contains all cables software and documentation needed to develop and run applications for Stellaris microcontrollers easily and quickly Th...

Страница 13: ...product page LM3S9B96 product page 11 Platform Specific Details DK LM3S9B96 Platform MIFARE specific standalone demo source code available This code demonstrates on up to two cards at a time reading...

Страница 14: ...mation www ti com 12 Mechanical Physical Information Figure 7 Mechanical Physical Information 14 TRF7960TB HF RFID Reader Module SLOU297 October 2010 Submit Documentation Feedback Copyright 2010 Texas...

Страница 15: ...na Q factor or experimenting further to improve a particular application TRF7960TB coil antenna tuning details starts with calculations to produce the theoretical values shown below and based on measu...

Страница 16: ...total cap value Figure 8 Smith Chart Simulation RPAR 1 3 k Figure 9 shows a Smith Chart simulation for RPAR value 680 standard value This chart indicates theoretical parallel and series capacitor valu...

Страница 17: ...The calculations and simulations for a desired Q range of 5 to 20 result in the graphs shown in Figure 10 and Figure 11 which indicate the required resistor and capacitance values that should be popu...

Страница 18: ...and lower Q value tuning solutions Figure 12 Higher Q Antenna Measurement Plots with Calculated Values Q 20 Figure 13 Lower Q Antenna Measurement Plots with Calculated Values Q 10 18 TRF7960TB HF RFID...

Страница 19: ...x 22 5mm 51mm x 32mm 76mm x 35mm 76mm x 45mm Higher Q Read Range cm Lower Q Read Range cm www ti com TRF7960TB Module Read Ranges 14 TRF7960TB Module Read Ranges Figure 14 through Figure 16 show read...

Страница 20: ...h statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury...

Страница 21: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TRF7960ATB...