Master Thesis

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Cross Polarization The cross polarization results for the microstrip line feeding antenna are however nice. The measured results for the cross polarization in both azimuth and elevation plane are shown in the figure 6.9 -‐11 -‐13 -‐15 -‐17 -‐19 -‐21 -‐23 -‐25 -‐100 -‐50 0 50 100 (a) (b) Figure 6.9 Cross Polarization in both azimuth (a) and Elevation (b) plane Similarly the measured cross polarization for probe fed antenna in both azimuth and elevation plane are shown in the figure 6.10 which are again below then the expectation level. 0 -‐5 -‐10 -‐15 -‐20 -‐100 -‐50 0 50 100 -‐18 -‐100 -‐50 0 50 100 (a) (b) Figure 6.10 Cross Polarization in both azimuth (a) and Elevation (b) plane 6.3.3 Simulated Results for Antennas with FR4 (0.8mm) Substrate -‐10 -‐11 -‐12 -‐13 -‐14 -‐15 -‐16 -‐17 -‐5 -‐70 -‐20 30 The same two antennas were designed with FR4 substrate however only the one with coaxial probe feeding will be discussed here as the other one didn’t yield any result at all, however there are more information in the appendix of the report. 1 0 -‐1 -‐2 -‐3 -‐4 50
Return Loss The return loss for this antenna is shown in the figure 6.11 which is around -‐11 dB for 5.8 GHz. Gain Figure 6.11 Return Loss of the antenna The simulated gain for the antenna is shown in the figure below. A peak gain of 6 dB at 2 o and a gain around 3.7 dB at ±35 o is achieved. The gain curve is shown in the figure 6.12 below. Figure 6.12 Gain of the antenna 51
Page 1 and 2: Master Thesis Design of Microstrip
Page 3 and 4: Chapter 4 3.1 Introduction………
Page 5 and 6: Acknowledgement I would like to exp
Page 7 and 8: 1.1 Kapsch TrafficCom Chapter 1 Ove
Page 9 and 10: The On-‐Board Units above provi
Page 11 and 12: 2.1 Introduction Chapter 2 Introduc
Page 13 and 14: Since this notation frequently caus
Page 15 and 16: 2.5 Antenna Parameters Figure 2.5 A
Page 17 and 18: 2.5.3 Return Loss Return loss is an
Page 19 and 20: 2.5.7 Conversion Gain The conversio
Page 21 and 22: However when the design was optimiz
Page 23 and 24: It can be seen that radiation patte
Page 25 and 26: Similarly, the axial ratio from HFS
Page 27 and 28: Cross Polarization The cross polari
Page 29 and 30: Figure 4.1 (b) Side view of the ant
Page 31 and 32: Gain Figure 4.5 Radiation Pattern f
Page 33 and 34: Similarly axial ratio from HFSS is
Page 35 and 36: Cross polarization Cross polarizati
Page 37 and 38: 5.1 Introduction Chapter 5 Patch An
Page 39 and 40: Similarly return loss in HFSS is sh
Page 41 and 42: Axial Ratio Figure 5.7 Gain (RHCP a
Page 43 and 44: 5.3.2 Measured Results Different me
Page 45 and 46: 6.1 Introduction Chapter 6 Truncate
Page 47 and 48: Cross polarization (a) (b) Figure 6
Page 49: esults and was centered at 5.8 GHz
Page 53 and 54: Axial Ratio Axial ratio gives an id
Page 55 and 56: 6.3.5 Simulated Results for Antenna
Page 57 and 58: Axial Ratio Axial ratio is another
Page 59 and 60: The results are very identical to t
Page 61 and 62: Results The simulation results of t
Page 63 and 64: 7.3 Spiral Antenna A spiral antenna
Page 65 and 66: Axial Ratio The axial ratio plot is
Page 67 and 68: 7.5 Conclusion All three antennas d
Page 69 and 70: 0 -‐2 -‐4 -‐6 -‐8 -
Page 71 and 72: Similarly the return loss measured
Page 73 and 74: Chapter 9 Conclusion Different Ante
Page 75 and 76: X Antenna (with 1.6 mm Substrate) A
Page 77 and 78: References [1] Per-‐Simon Kilda

Master Thesis

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