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HF Antenna Cookbook
Technical Application Report
11-08-26-001 Jan 2004
Radio Frequency Identification Systems
Lit. Number 11-08-26-001
Contents
Edition Two – Jan 2004 ........................................................................................................ i
About this Manual................................................................................................................ ii
Conventions ......................................................................................................................... ii
If You Need Assistance .......................................................................................................ii
Abstract ................................................................................................................................ 1
1
Construction Details ..................................................................................................... 2
1.1
Copper Tape............................................................................................................. 2
1.2
Copper Tube............................................................................................................. 3
1.2.1
Mounting tuning components..............................................................................................3
2
Copper Tube Antenna (500mm x 500mm).................................................................... 4
2.1
Matching Components .............................................................................................. 5
2.1.1
Gamma matching the Antenna ...........................................................................................5
3
Tape Antenna (1000 mm x 600 mm) ............................................................................. 7
3.1
Tuning to Resonance ................................................................................................ 8
3.2
Damping the Q.......................................................................................................... 8
3.3
Matching the Loop to 50 Ohms ............................................................................... 10
3.4
Tuning..................................................................................................................... 11
3.5
Adding a Common Mode Choke ............................................................................. 12
4
Copper Tube Antenna
(1 m x 1 m)
.............................................................................. 13
4.1
Matching Circuit Layout........................................................................................... 13
4.2
Matching Components ............................................................................................ 14
5
Double Loop Antenna ................................................................................................. 15
5.1
The Matching Board................................................................................................ 16
5.2
Matching Components ............................................................................................ 16
5.3
Winding the BALUN ................................................................................................ 17
6
Small Antenna 1 (40 mm × 30 mm)............................................................................. 18
6.1
Circuit Layout .......................................................................................................... 18
6.2
The Matching Components ..................................................................................... 18
7
Small Antenna 2 (50 mm × 30 mm)............................................................................. 19
7.1
Circuit Layout .......................................................................................................... 19
7.2
The Matching Components ..................................................................................... 19
8
Small Antenna 3 (60 mm × 30 mm)............................................................................. 20
8.1
Circuit Layout .......................................................................................................... 20
8.2
Matching Components ............................................................................................ 20
9
Small Antenna 4 (150 mm × 100 mm)......................................................................... 21
9.1
Circuit Layout .......................................................................................................... 21
9.2
Matching Components ............................................................................................ 22
10
Conclusion ............................................................................................................... 23
Figures
Figure 1.
Soldered Antenna Corners ................................................................................ 2
Figure 2.
Picture showing copper tube and the joining material .................................... 3
Figure 3.
Assembled Tube with Damping Resistor.......................................................... 3
Figure 4.
Copper Tube Antenna 500mm x 500mm ........................................................... 4
Figure 5.
Resonance Tuning Components ....................................................................... 4
Lit. Number 11-08-26-001
Figure 6.
Thick Film Damping Resistor ............................................................................ 5
Figure 7.
Gamma Matching Arm........................................................................................ 5
Figure 8.
Soldered Copper Tape Main Loop..................................................................... 7
Figure 9.
Variable Mica Capacitor ..................................................................................... 8
Figure 10.
Air Gap Variable Capacitor ............................................................................. 8
Figure 11.
10K Thick Film Resistor .................................................................................. 9
Figure 12.
Resonant Capacitors and Damping Resistor ................................................ 9
Figure 13.
Dimensions of Matching arms........................................................................ 10
Figure 14.
Completed Antenna......................................................................................... 11
Figure 15.
VSWR Meter ..................................................................................................... 12
Figure 16.
Common Mode Choke..................................................................................... 12
Figure 17.
The 1 m Loop with Spacer ............................................................................. 13
Figure 18.
Artwork for Matching Board ........................................................................... 14
Figure 19.
1 m × 1 m Antenna Matching Circuit .............................................................. 14
Figure 20.
Double Loop Antenna ..................................................................................... 15
Figure 21.
Clinch Nuts ...................................................................................................... 15
Figure 22.
Artwork and Completed Board ....................................................................... 16
Figure 23.
How to Wind The BALUN ................................................................................ 17
Figure 24.
Matching Board Connected ............................................................................ 17
Figure 25.
40 mm × 30 mm Antenna Artwork .................................................................. 18
Figure 26.
Completed Antenna......................................................................................... 18
Figure 27.
50 mm × 30 mm Antenna Artwork .................................................................. 19
Figure 28.
Completed Antenna......................................................................................... 19
Figure 29.
60 mm × 30 mm Antenna Artwork .................................................................. 20
Figure 30.
Completed Antenna......................................................................................... 20
Figure 31.
150 mm × 100 mm Antenna Artwork .............................................................. 21
Figure 32.
Completed Antenna......................................................................................... 22
Figure 33.
Roller Conveyor Read Gate ............................................................................ 23
Lit. Number 11-08-26-001
Edition Two – Jan 2004
This is the second edition of this
Technical Application Report
called
HF Antenna Cookbook.
It contains descriptions of how to build and tune antennas for use at 13.56MHz which can be
used in conjunction with:
S4100, S6350, S6400, and S6500 Series Readers
This document has been created to help support Texas Instruments’
Customers in designing in and /or using TI*RFID products for their chosen
application. Texas Instruments does not warrant that its products will be
suitable for the application and it is the responsibility of the Customer to
ensure that these products meet their needs, including conformance to
any relevant regulatory requirements.
Texas Instruments (TI) reserves the right to make changes to its products
or services or to discontinue any product or service at any time without
notice. TI provides customer assistance in various technical areas, but
does not have full access to data concerning the use and applications of
customers’ products.
Therefore, TI assumes no liability and is not responsible for Customer
applications or product or software design or performance relating to
systems or applications incorporating TI products. In addition, TI assumes
no liability and is not responsible for infringement of patents and / or any
other intellectual or industrial property rights of third parties, which may
result from assistance provided by TI.
TI products are not designed, intended, authorized or warranted to be
suitable for life support applications or any other life critical applications
which could involve potential risk of death, personal injury or severe
property or environmental damage.
TIRIS
and
TI*RFID
logos, the words
TI*RFID™
and
Tag-it™
are trademarks or registered
trademarks of Texas Instruments Incorporated (TI).
Copyright (C) 2001 Texas Instruments Incorporated (TI)
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.
Page (i)
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HF Antenna Cookbook
Technical Application Report
11-08-26-001 Jan 2004
Radio Frequency Identification Systems
Lit. Number 11-08-26-001
Contents
Edition Two – Jan 2004 ........................................................................................................ i
About this Manual................................................................................................................ ii
Conventions ......................................................................................................................... ii
If You Need Assistance .......................................................................................................ii
Abstract ................................................................................................................................ 1
1
Construction Details ..................................................................................................... 2
1.1
Copper Tape............................................................................................................. 2
1.2
Copper Tube............................................................................................................. 3
1.2.1
Mounting tuning components..............................................................................................3
2
Copper Tube Antenna (500mm x 500mm).................................................................... 4
2.1
Matching Components .............................................................................................. 5
2.1.1
Gamma matching the Antenna ...........................................................................................5
3
Tape Antenna (1000 mm x 600 mm) ............................................................................. 7
3.1
Tuning to Resonance ................................................................................................ 8
3.2
Damping the Q.......................................................................................................... 8
3.3
Matching the Loop to 50 Ohms ............................................................................... 10
3.4
Tuning..................................................................................................................... 11
3.5
Adding a Common Mode Choke ............................................................................. 12
4
Copper Tube Antenna
(1 m x 1 m)
.............................................................................. 13
4.1
Matching Circuit Layout........................................................................................... 13
4.2
Matching Components ............................................................................................ 14
5
Double Loop Antenna ................................................................................................. 15
5.1
The Matching Board................................................................................................ 16
5.2
Matching Components ............................................................................................ 16
5.3
Winding the BALUN ................................................................................................ 17
6
Small Antenna 1 (40 mm × 30 mm)............................................................................. 18
6.1
Circuit Layout .......................................................................................................... 18
6.2
The Matching Components ..................................................................................... 18
7
Small Antenna 2 (50 mm × 30 mm)............................................................................. 19
7.1
Circuit Layout .......................................................................................................... 19
7.2
The Matching Components ..................................................................................... 19
8
Small Antenna 3 (60 mm × 30 mm)............................................................................. 20
8.1
Circuit Layout .......................................................................................................... 20
8.2
Matching Components ............................................................................................ 20
9
Small Antenna 4 (150 mm × 100 mm)......................................................................... 21
9.1
Circuit Layout .......................................................................................................... 21
9.2
Matching Components ............................................................................................ 22
10
Conclusion ............................................................................................................... 23
Figures
Figure 1.
Soldered Antenna Corners ................................................................................ 2
Figure 2.
Picture showing copper tube and the joining material .................................... 3
Figure 3.
Assembled Tube with Damping Resistor.......................................................... 3
Figure 4.
Copper Tube Antenna 500mm x 500mm ........................................................... 4
Figure 5.
Resonance Tuning Components ....................................................................... 4
Lit. Number 11-08-26-001
Figure 6.
Thick Film Damping Resistor ............................................................................ 5
Figure 7.
Gamma Matching Arm........................................................................................ 5
Figure 8.
Soldered Copper Tape Main Loop..................................................................... 7
Figure 9.
Variable Mica Capacitor ..................................................................................... 8
Figure 10.
Air Gap Variable Capacitor ............................................................................. 8
Figure 11.
10K Thick Film Resistor .................................................................................. 9
Figure 12.
Resonant Capacitors and Damping Resistor ................................................ 9
Figure 13.
Dimensions of Matching arms........................................................................ 10
Figure 14.
Completed Antenna......................................................................................... 11
Figure 15.
VSWR Meter ..................................................................................................... 12
Figure 16.
Common Mode Choke..................................................................................... 12
Figure 17.
The 1 m Loop with Spacer ............................................................................. 13
Figure 18.
Artwork for Matching Board ........................................................................... 14
Figure 19.
1 m × 1 m Antenna Matching Circuit .............................................................. 14
Figure 20.
Double Loop Antenna ..................................................................................... 15
Figure 21.
Clinch Nuts ...................................................................................................... 15
Figure 22.
Artwork and Completed Board ....................................................................... 16
Figure 23.
How to Wind The BALUN ................................................................................ 17
Figure 24.
Matching Board Connected ............................................................................ 17
Figure 25.
40 mm × 30 mm Antenna Artwork .................................................................. 18
Figure 26.
Completed Antenna......................................................................................... 18
Figure 27.
50 mm × 30 mm Antenna Artwork .................................................................. 19
Figure 28.
Completed Antenna......................................................................................... 19
Figure 29.
60 mm × 30 mm Antenna Artwork .................................................................. 20
Figure 30.
Completed Antenna......................................................................................... 20
Figure 31.
150 mm × 100 mm Antenna Artwork .............................................................. 21
Figure 32.
Completed Antenna......................................................................................... 22
Figure 33.
Roller Conveyor Read Gate ............................................................................ 23
Lit. Number 11-08-26-001
Edition Two – Jan 2004
This is the second edition of this
Technical Application Report
called
HF Antenna Cookbook.
It contains descriptions of how to build and tune antennas for use at 13.56MHz which can be
used in conjunction with:
S4100, S6350, S6400, and S6500 Series Readers
This document has been created to help support Texas Instruments’
Customers in designing in and /or using TI*RFID products for their chosen
application. Texas Instruments does not warrant that its products will be
suitable for the application and it is the responsibility of the Customer to
ensure that these products meet their needs, including conformance to
any relevant regulatory requirements.
Texas Instruments (TI) reserves the right to make changes to its products
or services or to discontinue any product or service at any time without
notice. TI provides customer assistance in various technical areas, but
does not have full access to data concerning the use and applications of
customers’ products.
Therefore, TI assumes no liability and is not responsible for Customer
applications or product or software design or performance relating to
systems or applications incorporating TI products. In addition, TI assumes
no liability and is not responsible for infringement of patents and / or any
other intellectual or industrial property rights of third parties, which may
result from assistance provided by TI.
TI products are not designed, intended, authorized or warranted to be
suitable for life support applications or any other life critical applications
which could involve potential risk of death, personal injury or severe
property or environmental damage.
TIRIS
and
TI*RFID
logos, the words
TI*RFID™
and
Tag-it™
are trademarks or registered
trademarks of Texas Instruments Incorporated (TI).
Copyright (C) 2001 Texas Instruments Incorporated (TI)
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.
Page (i)
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