Basic Antenna Principles for Mobile Communications

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Figure 12: Gain via horizontal beaming Omnidirectional Antenna (λ/2 dipole) Half power beam width Gain (ref.λ/2 dipole) 360° 0 dB λ/2 dipole in front of a reflector 180° 3 dB 2 λ/2 dipoles in front of a reflector 90° 6 dB (theoretical radiation diagrams) – B 10 –
Figure 13: Yagi – and log.-per. Antennas Radiation diagrams with relative field strength 62° 87° 10 10 log.-per. Antenna K 73 23 2 406 – 512 MHz 3 0 dB in the plane of polarization 3 0 dB perpendicular to the plane of polarization Radiation diagrams with relative field strength 53° 63° 10 10 Yagi-Antenna K 52 07 21 146 – 174 MHz 3 0 dB in the plane of polarization 3 0 dB perpendicular to the plane of polarization – B 11 –
Page 1 and 2: Basic Antenna Principles for Mobile
Page 3 and 4: 6. Car Antennas P- 13 6.1 λ/4 Ante
Page 5 and 6: 2. Theory Antennas transform wire p
Page 7 and 8: 3.5 Impedance The frequency dependa
Page 9 and 10: 4.2 Directional Antennas 4.2.1 Gain
Page 11 and 12: 5. Particular Techniques used in GS
Page 13 and 14: - If in addition the vertical path
Page 15 and 16: 6.2 Gain Antennas The reference ant
Page 17 and 18: 6.7 Train Antennas Car antennas are
Page 19 and 20: 7.3 Shortened Antennas Shortened λ
Page 21 and 22: Figure 1: Mobile communication serv
Page 23 and 24: Figure 4: Field distribution on a
Page 25 and 26: Figure 7: VSWR, Return Loss Attenua
Page 27 and 28: Figure 9: Offset omnidirectional an
Page 29: dB Figure 11: 9 dB Omnidirectional
Page 33 and 34: Figure 15: Directional antenna syst
Page 35 and 36: Figure 18: Omni Base Station R x T
Page 37 and 38: Figure 22: X-Pol Antenna System X-P
Page 39 and 40: Figure 25: Schematic of a Patch Ant
Page 41 and 42: Figure 29: Changes in radiation pat
Page 43 and 44: Figure 32: Screen surface direct mo
Page 45 and 46: Figure 35: Train Antenna at 450 MHz

Basic Antenna Principles for Mobile Communications

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