Справочник Пользователя для Modular Mining Systems Inc 302395
Antenna Evaluation
February 2004
21
3.4.2 Sector Antennas
The network uses two sector antenna models.
Sector Antennas
Medium Gain
High Gain
Horizontal
Pattern
90 Deg
Horizontal
Pattern
120 Deg
Vertical
Pattern
35 Deg
Vertical
Pattern
16 Deg
Gain
10 dBi
Gain
13 dBi
Figure 10 Sector Antennas
Characteristics of Sector Antennas
Medium Gain
tall vertical pattern covers deeper pits, but narrower
horizontal pattern provides less horizontal coverage
horizontal pattern provides less horizontal coverage
High Gain
wider horizontal coverage and higher gain than medium
gain antenna, but narrower vertical pattern requires
antenna tilt for good vertical pit coverage
gain antenna, but narrower vertical pattern requires
antenna tilt for good vertical pit coverage