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13.56MHzRFIDProximityAntennas_PhilipsSemiconductors_78010

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标签: 13.56RFID飞利浦PhilipsAntennas

2002 年的飞利浦 NXP 天线设计文档

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READER COMPONENTS mifare 14443A 1356 MHz RFID Proximity Antennas Revision 10 PUBLIC Philips Semiconductors November 2002 Philips Semiconductors Rev 10 November 2002 1356 MHz RFID Proximity Antennas mifare 14443A CONTENTS 1 2 3 4 5 6 11 12 13 31 32 33 INTRODUCTION3 Purpose and Scope3 Abbreviations 3 Reference Documents3 HOW TO USE THIS DOCUMENT4 THE MIFARE RF INTERFACE 5 Energy Transmission6 Data Transmission PCD cid198 PICC 7 Data Transmissio......

READER COMPONENTS mifare® (14443A) 13.56 MHz RFID Proximity Antennas Revision 1.0 PUBLIC Philips Semiconductors November 2002 Philips Semiconductors Rev. 1.0 November 2002 13.56 MHz RFID Proximity Antennas mifare® (14443A) CONTENTS 1 2 3 4 5 6 1.1 1.2 1.3 3.1 3.2 3.3 INTRODUCTION......................................................................................3 Purpose and Scope..................................................................................3 Abbreviations .........................................................................................3 Reference Documents.............................................................................3 HOW TO USE THIS DOCUMENT.........................................................4 THE MIFARE® RF INTERFACE ...........................................................5 Energy Transmission..............................................................................6 Data Transmission PCD (cid:198) PICC ..........................................................7 Data Transmission PICC (cid:198) PCD ..........................................................9 THE PCD ANTENNA .............................................................................11 The PCD Antenna size .........................................................................11 Environmental Influences.....................................................................13 Antenna Shielding and Compensation ................................................14 ANTENNA DECISION GUIDE .............................................................20 ANNEX .....................................................................................................22 Theory for estimating the optimum PCD antenna radius .....................22 Parameters and Units............................................................................24 CONTACT INFORMATION................................................................................26 4.1 4.2 4.3 6.1 6.2 2 PUBLIC Philips Semiconductors Rev. 1.0 November 2002 13.56 MHz RFID Proximity Antennas mifare® (14443A) 1 INTRODUCTION 1.1 Purpose and Scope This application note is intended to support RF-related design–in of Micore reader ICs. The aim is to provide the required understanding of the MIFARE® RF interface (ISO 14443A) to design application specific antennas and matching circuits to achieve the best performance for a communication with a contactless MIFARE® card. This paper shall give a background on the system’s RF part and an overview on the used antenna designs. 1.2 Abbreviations ASK OOK UID RF Micore Amplitude Shift Keying On-Off Keying Unique IDentifier radio frequency contactless reader IC family including : MF RC500 MF RC530 MF RC 531 SL RC400 CL RC632 PCD 13.56MHz Proximity Reader (Proximity Coupling Device according to the ISO14443) MIFARE® Proximity Card PICC 1.3 Reference Documents “Data Sheet; SL RC400 I Code Reader IC” 1) “MIFARE® and I Code, Micore Directly Matched Antenna Design” 2) 3) “MIFARE® MF RC500; Highly Integrated ISO 14443A Reader IC” 4) “MIFARE® MF RC 530 ISO14443A reader IC” 5) “MIFARE® MF RC531; ISO 14443 Reader IC” 6) “MIFARE® and I Code CL RC632 Multiple protocol contactless reader IC” 3 PUBLIC Philips Semiconductors Rev. 1.0 November 2002 13.56 MHz RFID Proximity Antennas mifare® (14443A) 2 HOW TO USE THIS DOCUMENT The chapter 3 of this document shows the basic principles of the RF interface as it used with MIFARE®. The general understanding of this principle helps to do a fast and reliable antenna design based on Micore reader ICs, but none of the given formulas (especially those in the annex) are necessary to design such an antenna. The chapter 4 describes some basic facts about the PCD antenna, its optimum size, and how to minimize environmental influences. The given rules and design recommendations should generally be considered for a PCD antenna design. This is true for a Micore based antenna design, too. The chapter 5 gives an overview and comparison of the two antenna design principles for Micore antennas. A help is given to find the best solution based on certain application requirements. This application note cannot and does not replace any of the relevant datasheets. “Card” in this document means a contactless smart card according to the ISO14443A (or MIFARE®) or a contactless tag / label according to the ISO15693 (or I-Code®). “Micore” includes all contactless reader ICs as the MF RC500, MF RC530, MF RC531, SL RC400 and the CL RC632. For all of these ICs the antenna matching is the same. Remarks and Comments are given in italic letters (blue marked). 4 PUBLIC Philips Semiconductors Rev. 1.0 November 2002 13.56 MHz RFID Proximity Antennas mifare® (14443A) 3 THE MIFARE® RF INTERFACE The MIFARE® technology describes an ISO 14443-Type A compliant RF interface for a communication between a PCD and a PICC. Table 1 gives a short overview on the MIFARE® RF interface. Essentially the MIFARE® RF interface follows the transformer principle, although both the PCD and PICC antenna of course are resonance circuitries as antennas usually are. The PICC is passive with no onboard battery. Thus, an energy transmission from the PCD to the PICC is required in addition to the communication (data transmission) in both directions between the PCD and the PICC (see Figure 1). Table 1: Overview MIFARE® RF interface Transformer principle; MIFARE® card is passive 13.56 MHz Energy transmission Operating frequency Communication structure Half duplex, reader talks first Data rate Data transmission RWD (cid:198) Card Card (cid:198) RWD 105.9 kHz 100 % ASK, Modified Miller Code Load Modulation, Subcarrier 847.5 kHz, OOK, Manchester Code In the following the fundamentals of the MIFARE® RF interface are described starting with the basic energy transmission. Finally, the data transmission and the used data coding in both directions will be shown. Figure 1: Mifare Interface Principle 5 PUBLIC
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