Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola

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List of figures Figure 2.1. Multi path propagation of the transmitted signal………………….. 6 Figure 2.2. Digital TV standards used in the world……………………………. 8 Figure 2.3. Connection between the specifications defining DVB-H.………….10 Figure 2.4. An example of the data sent trough one multiplexer……………….12 Figure 2.5. The three elements that form the DVB-H codec…………………... 13 Figure 2.6. The MPE-FEC frame……………………………………………….14 Figure 2.7. DVB-H symbol interleaving scheme……………………………….15 Figure 2.8. Voltage reflection from a mismatched load……………………….. 19 Figure 2.9. Impedance bandwidth………………………………………………21 Figure 2.10. Parallel resonance circuit………………………………………….22 Figure 2.11. Matching circuit scheme…………………………………………..24 Figure 3.1. Yagi-Uda antenna………………………………………………...... 27 Figure 3.2. Four different configurations to feed microstrip antennas………….29 Figure 3.3. PIFA antenna………………………………………………………. 29 Figure 4.1. Specified gain for handheld DVB-T terminals……………………..30 Figure 4.2. Dipole antenna……………………………………………………... 32 Figure 4.3. Dipole antenna dimensions………………………………………....32 Figure 4.4. Dipole antenna, return loss graph………………………………….. 33 Figure 4.5. PIFA antenna………………………………………………………. 34 Figure 4.6. PIFA return loss graph…………………………………………….. 34 Figure 4.7. Folded-patch antenna……………………………………………….35 Figure 4.8. Return loss graph for the folded-patch…………………………….. 36 Figure 4.9. Folded-patch 2 antenna……………………………………………..37 Figure 4.10. Return loss graph of the folded-patch 2………………..….………38 Figure 4.11. Loop antenna schematic………………………………………….. 39 Figure 4.12. Perlos loop antenna………………...……………………………...39 Figure 4.13. Perlos loop antenna return loss graph……………………………..40 Figure 4.14. Wire loop antenna…………………………………………………40 Figure 4.15. Wire loop antenna return loss graph………………………………41 Figure 4.16. Loop antenna…………………………………………………….. 42 Figure 4.17. Loop antenna return loss graph………………………………….. 42 Figure 4.18. Model of switched monopole concept…………………………….43 Figure 4.19. Example of four different matching circuits……………………... 44 Figure 4.20. Switched monopole without RF switches………………………... 44 Figure 4.21. Schematic for four matching……………………………………... 45 Figure 4.22. Return loss Graph for switched monopole……………………….. 46 Figure 4.23. Switched monopole 2…………………………………………….. 48 Figure 4.24. Return loss graph - circuit 1, switched monopole 1……………… 49 Figure 4.25. Return loss graph - circuit 2, switched monopole 1……………… 49 Figure 4.26. Return loss graph - circuit 3, switched monopole 1……………… 50 Figure 4.27. Return loss graph - circuit 4, switched monopole 1……………… 50 Figure 4.28. Return loss graph - circuit 1, switched monopole 2……………… 51 Figure 4.29. Return loss graph - circuit 2, switched monopole 2……………… 52 Figure 4.30. Return loss graph - circuit 3, switched monopole 2……………… 52 Figure 4.31. Return loss graph - circuit 4, switched monopole 2....…………… 53 Figure 5.1. Schematic view of Perlos anechoic chamber……………………… 54 V
Figure 5.2. Reference dipole antenna………………………………………….. 55 Figure 5.3. Reference dipole antenna return loss graph……………………….. 55 Figure 5.4. Radiation pattern for Reference antenna………………………….. 56 Figure 5.5. Radiation pattern for Reference antenna………………………….. 56 Figure 5.6. Radiation pattern for Reference antenna………………………….. 57 Figure 5.7. Gain for the folded-patch 1 verses specification………………….. 59 Figure 5.8. Radiation pattern for Folded-patch 1……………………………….60 Figure 5.9. Radiation pattern for Folded-patch 1……………………………….60 Figure 5.10. Radiation pattern for Folded-patch 1………………..…………….61 Figure 5.11. Gain for five different capacitances in the loop antenna…………. 61 Figure 5.12. Radiation pattern for Loop antenna………………………………. 63 Figure 5.13. Radiation pattern for Loop antenna………………………………. 63 Figure 5.14. Radiation pattern for Loop antenna………………………………. 64 Figure 5.15. Gain for the different circuits, switched monopole 1…………….. 64 Figure 5.16. Radiation pattern for Switched monopole 1……………………… 65 Figure 5.17. Radiation pattern for Switched monopole 1……………………… 66 Figure 5.18. Radiation pattern for Switched monopole 1……………………… 66 Figure 5.19. Gain for the different circuits, switched monopole 2…………….. 67 Figure 5.20. Radiation pattern for Switched monopole 2……………………… 68 Figure 5.21. Radiation pattern for Switched monopole 2……………………… 68 Figure 5.22. Radiation pattern for Switched monopole 2……………………… 69 VI
Page 1 and 2: Design of Antennas for Handheld DVB
Page 3 and 4: Acknowledgements This master thesis
Page 5: 4 DESIGN AND TESTING OF ANTENNA SOL
Page 9 and 10: 1 Introduction The passed decade th
Page 11 and 12: 2 Background This chapter provides
Page 13 and 14: is simultaneously modulated into 10
Page 15 and 16: 2.1.3 Reed-Solomon Codes 2.1.4 DVB-
Page 17 and 18: 2.1.5 DVB-H DVB-H is the latest dev
Page 19 and 20: 2.1.5.2 Time slicing A large proble
Page 21 and 22: figure 2.5). All three elements tog
Page 23 and 24: symbols or four 2K OFDM symbols. Th
Page 25 and 26: 2.2 Competing standards The DVB-H s
Page 27 and 28: 2.3 Antenna theory This section des
Page 29 and 30: Figure 2.9. Impedance bandwidth def
Page 31 and 32: unloaded quality factor (Q0) and th
Page 33 and 34: losses should be avoided in handhel
Page 35 and 36: 3.3 Loop Figure 3.1. Yagi-Uda anten
Page 37 and 38: PIFA Figure 3.2. Four different con
Page 39 and 40: The size of the antenna is another
Page 41 and 42: 4.4 PIFA To verify the balun a resi
Page 43 and 44: 4.5 Folded-Patch With the PIFA-ante
Page 45 and 46: Figure 4.9a. Folded-patch 2, front
Page 47 and 48: Figure 4.11. Loop antenna schematic
Page 49 and 50: Figure 4.15. Wire loop antenna retu
Page 51 and 52: using an H-field antenna together w
Page 53 and 54: antenna. The dimension of the anten
Page 55 and 56: The result of the return loss measu
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Figure 4.24. Return loss graph for
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The result of the measurement of th
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Figure 4.31. Return loss graph for
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frequency band, the first from 470
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Figure 5.6. Radiation pattern for R
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5.1.3 Measurement result In this ch
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Figure 5.10. Radiation pattern for
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Page 73 and 74:
Table 5.4. Switched monopole 1, gai
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Power gain / dB 2 0 -2 -4 -6 -8 -10
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was received in all five channels.
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6.3 Control signal 6.4 Cost The swi
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not be possible, there will always
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There are many advantages with tuna
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8 References [1] Schiller, Jochen -
Page 89:
[29] Gardiol, Fred - Microstrip cir
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Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola

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