Basic Antenna Principles for Mobile Communications

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Figure 16: Multiple path propagation via reflections α Figure 17: Signal level improvement using diversity Signal level in dB Signal A Signal B Signal via switching Source: William C.Y. Lee, <strong>Mobile</strong> <strong>Communications</strong> Design Fundamentals Distance – B 14 –
Figure 18: Omni Base Station R x T x R x 5m 1m 4m 4m Figure 19: Sector Base Station ~ 4 m R x1A T x1 R x1B R x3B T x3 R x3A R x2A T x2 R x2B – B 15 –
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 and 30: dB Figure 11: 9 dB Omnidirectional
Page 31 and 32: Figure 13: Yagi - and log.-per. Ant
Page 33: Figure 15: Directional antenna syst
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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