《HF Antenna Cookbook》.pdf
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HF Antenna Cookbook
Technical Application Report
11-08-26-001 March 2001
Radio Frequency Identification Systems
Lit. Number 11-08-26-001
Contents
Edition One – March 2001 i
About this Manualii
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
2.1.1 Gamma matching the Antenna5
3 Tape Antenna (550mm x 800mm) 6
3.1 Tape Antenna tuning circuit 6
3.2 Tape antenna T Matching 7
3.2.1 Method to locate the matching point 7
4 Twin Loop Antenna (2 x 500mm x 500mm) 8
4.1 Twin loop Matching Tuning Circuit with BALUN 9
4.2 Antenna / Transmitter Matching with BALUN 10
4.2.1 How to construct a Matching Balun10
5 Small Round Antenna 12
6 Spiral Antenna 13
6.1 Spiral Antenna construction details 13
7 Conclusion 14
References 14
Figures
Figure 1. Copper tape folded and soldered 2
Figure 2. Picture showing copper tube and the joining material 3
Figure 3. Assembled Copper Tube end3
Figure 4. Copper Tube Antenna 500mm x 500mm 4
Figure 5. Resonance Tuning Components 4
Figure 6. Gamma Matched Antenna 5
Figure 7. Tape Antenna (550mm x 800mm) 6
Figure 8. Tape antenna tuning components6
Figure 9. Tape antenna T matching7
Figure 10. Twin-loop Antenna8
Figure 11. Tuning circuit9
Figure 12. Antenna Transmitter Matching using a BALUN10
Figure 13. Example BALUN Matching Network 10
Figure 14. Small Round antenna 12
Figure 15. Small Rou
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