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Tag-it Environmental Effects on Transponder Inlays Application Note

11-09-26-001 March 1999

Tag-it Environmental Effects on Transponder Inlays Application Note
11-09-26-001 March 1999
Tag-it Environmental Effects on Transponder Inlays
March 1999
Edition One, March 1999
This is the first edition of this application note for Tag-it transponder inlays.
This document may be downloaded onto a computer, stored and duplicated as necessary to support the use of the related TI products. Any other type of duplication, circulation or storage on data carriers in any manner not authorized by TI represents a violation of the applicable Copyright laws and shall be prosecuted.
PREFACE
About this application note:
This application note describes the performance of TIRIS transponder inlays under environmental influences, describes and gives the results of a series of tests carried out in the Texas Instruments laboratories.
Chapter 1:
Gives a general description of the transponder inlay types tested and the tests performed. Describes the test setup used. Test results.
Chapter 2: Chapter 3:
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Contents
Chapter 1: Introduction .........................................5 1.1 General .................................................6 1.2 Transponder types.........................................6 1.3 Testing ..................................................7 Chapter 2: Test Set-up for Measurements ..........................9 2.1 General ................................................10 2.2 Test Set-up..............................................10 2.3 Test Conditions...........................................11 Chapter 3: Test Results........................................13 3.1 General ................................................14 3.2 Effects of Metal...........................................14 3.3 Effects of Contact with various Materials ........................16 3.4 Effects of a Second Transponder Inlay.........................17 3.5 Ultra-Violet Sensitivity Test ..................................18
List of Figures
Figure 1: Transponder RI-I01-110A-00 .............................6 Figure 2: Transponder RI-I02-110A-00 .............................6 Figure 3: Test Set-up.........................................11 Figure 4: Effects of Metal Objects ................................15 Figure 5: Effects of various Materials .............................16 Figure 6: Effects of a second transponder inlay......................17 Figure 7: UV-Sensitivity Test Set-up ..............................18
Chapter 1
Introduction
Topic
1.1 General ....................................................6 1.2 Transponder types............................................6 1.3 Testing .....................................................7
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1.1 General
Tests described in this application note were performed with Tag-it transponder inlays of the type: RI-I01-110A-00 (square antenna) RI-I02-110A-00 (rectangular antenna)
Note: Detailed information on how to handle transponder inlays for label manufacturing and other purposes is available in the application note Tag-it Transponder Inlays (No. 11-09-22-078) available as an Adobe Acrobat document (PDF file) via the Texas Instruments internet home page: http://www.tiris.com
1.2 Transponder types
The following transponder types were used for testing purposes:
March 1999
Introduction
1.3 Testing
A series of tests were carried out on the TIRIS transponder inlays as described in the following chapters, the inlays being measured after each test on the test set-up as described in Chapter 2.
The tests consisted of: Effects of metal objects in close proximity to the inlay Effects of different materials bonded to the inlay Effects of two transponder inlays in proximity to one another Sensitivity of the inlay to ultra-violet light
Chapter 2
Test Set-up for Measurements
Topic
2.1 General ....................................................10 2.2 Test Set-up..................................................10 2.3 Test Conditions...............................................11
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2.1 General
These tests have been carried out in the Texas Instruments laboratories to provide information concerning performance of the TIRIS transponder inlays in conditions approximating those to be found in user environments, with results which are applicable to a real-world situation. The set-up described here was used to measure the performance of the transponder inlays after carrying out the series of tests described in Chapter 3. The criterion used to determine the definition of good transponder inlay performance was the maintenance of readability without errors during the testing processes.
2.2 Test Set-up
The test configuration, a Reader / Antenna set (RI-K02-320A), was connected to the host PC via an RS 232 Interface. For control of the Tag-it Reader / Antenna Set, Tag-it Navigator software, a utility and demonstration program which may be downloaded from the TIRIS web site, was installed.
Note: The Tag-it Navigator is a Windows® program capable of communicating with the Tag-it reader via a standard serial interface. It supports the Host Protocol implemented in the reader, allowing the execution of commands such as the writing and reading of data to and from Tag-it transponders. Tag-it Navigator, which runs within the Windows® environment, is menu-driven and can be employed to assist in reader set-up, tuning, and diagnosis. It can additionally log transponder responses for initial experimentation and testing with the Tag-it system. It also provides data and time information and can display the acquired data in a number of formats.
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Test Set-up for Measurements
Test Material Transmitter Transponder Inlay
Reader Reading Distance
Figure 3: Test Set-up
2.3 Test Conditions
Electrical Transponder type: Field strength: Max. read range: Transmitter power: RI-I01-110A-00 RI-I02-110A-00 153 dB / uVm 220 mm 800 mW 156 dB / uVm 190 mm
Transponder inlay operating frequency: 13.56 MHz
Chapter 3
Test Results
Topic
3.1 General ....................................................14 3.2 Effects of Metal...............................................14 3.3 Effects of Contact with various Materials............................16 3.4 Effects of a Second Transponder Inlay.............................17 3.5 Ultra-Violet Sensitivity Test ......................................18
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3.1 General
The graphs shown in the following chapters show the results for both of the transponder types tested. The maximum reading performance was achieved with the transponder inlay type RI-I02-110A-00 (rectangular antenna).
3.2 Effects of Metal
The effect of different test materials was evaluated by successively moving the test material towards to the Tag-it transponder inlay, the measurements being carried out statically, i.e. with the material at rest. Test Set-up Configuration as described in chapter 2.2, Fig. 3
Test Material Aluminium plate 100 x 100 x 10 mm Steel plate 100 x 100 x 10 mm
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Test Results
Metal
RI-I02-110A-0 (K01) RI-I01-110A-0 (J01)
Figure 4: Effects of Metal Objects
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3.3 Effects of Contact with various Materials
Since the transponder inlay is often in direct contact with other materials, for example for mechanical support purposes, this test has been carried out to gather data relating to this condition. The distances used between the test materials and the transponder inlay differ according to the type of material used, with in some cases the test material being attached directly to the transponder inlay.
Test Set-up Configuration as described in chapter 2.2, Figure 3.
Test Conditions Test materials were either bonded or laminated to the transponder inlay, these materials being PVC, PET, normal paper and silicon-coated paper.
Test Results Figure 5: Effects of various Materials
Frequency Shift (KHz)
Q-Factor Shift
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Test Results
3.4 Effects of a Second Transponder Inlay
This test simulates a situation which can occur in a production environment, namely that two transponders are found in close proximity to each other.
Test Set-up Configuration as described in chapter 2.2 Figure 3.
Test Conditions The test material shown in Fig. 2 was replaced by a second transponder inlay.
Test Parameters Two similar transponder types were used to measure the influence of a second transponder inlay.
Figure 6: Effects of a second transponder inlay
SID Code Test
RI-I02-110A-00 ( K01 )
RI-I01-110A-00 ( J01 )
Tag-it Environmental Effects on Transponder Inlays
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3.5 Ultra-Violet Sensitivity Test
This test was carried out to approximate, under laboratory conditions, the effects of exposure of the transponder inlays to ultra-violet light. The transponder chips were placed in open ceramic housings and then exposed to a strong ultra-violet light source, a UV EPROM eraser (Spectroline Model PR 125 T / F) being used for this purpose. Similarly, the transponder inlays themselves were placed in open ceramic housings and irradiated first from the top, then turned through 180° and irradiated again. Test Conditions All blocks programmed with 5555555hex Check of user block contents Check of SID number Check of lock bit function
Test Parameters UV Wavelength: 254nm Intensity: 17000 µW / cm2
UV-lamp
Transponder Inlays
Figure 7: UV-Sensitivity Test Set-up UV Exposure Test Results Item Chip in open ceramic housing Inlay RI-I01-110A-00 (top side) Inlay RI-I01-110A-00 (bottom side) No. of Samples 4 10 10 Start No failures No failures No failures Duration of Irradiation 10 minutes 2 hours Erased No failures No failures No failures No failures