User's Manual

Appendix
BreezeNET PRO.11 Series 8-15 User’s Guide
F is the RF frequency expressed in Mhz.
R is the distance between the transmitting and receiving antennas.
At 2.4 GHz, this formula is: 105+20xLog(D
Mile
)
Antenna Characteristics
Isotropic Antenna
A hypothetical, lossless antenna having equal radiation intensity in all
directions. Used as a zero dB gain reference in directivity calculation (gain).
Antenna Gain
A measure of directivity. It is defined as the ratio of the radiation intensity
in a given direction to the radiation intensity that would be obtained if the
power accepted by the antenna was radiated equally in all directions
(isotropically). Antenna gain is expressed in dBi.
Radiation Pattern
A graphical representation in either polar or rectangular coordinates of the
spatial energy distribution of an antenna.
Side Lobes
The radiation lobes in any direction other than that of the main lobe.
Omni-directional Antenna
Radiates and receives equally in all directions in azimuth. The following
diagram shows the radiation pattern of an omnidirectional antenna with its
side lobes in polar form.
Figure 9.8: Side View