Справочник Пользователя для Modular Mining Systems Inc 302395
302395 User’s Guide and Repeater Network Design Guide
20
February 2004
3.4
Signal Patterns and Gain Characteristics for Antenna Types
This section describes signal patterns and gain characteristics for antennas used in the radio network.
3.4.1 Omnidirectional Antennas
The network uses two omnidirectional antenna models.
Omni Antennas
Low Gain
Medium Gain
Horizontal
Pattern
360 Deg
Horizontal
Pattern
360 Deg
Vertical
Pattern
60 Deg
Vertical
Pattern
25 Deg
Gain
2.5 dBi
Gain
6.0 dBi
Figure 9 Omnidirectional Antennas
Characteristics of Omni Antennas
Horizontal Pattern
omni-directional antennas provide full 360 degree
coverage
coverage
Vertical Pattern
taller higher-gain omni antennas have more narrowly
focused vertical coverage
focused vertical coverage
Gain
gain increases as vertical pattern becomes more focused