User's Guide
Appendix A. Radio Signal Propagation
BreezeNET PRO.11 Series A-5 User’s Guide
Directional Antenna
Radiates and receives most of the signal power in one direction. The following
diagram shows the radiation pattern of a directional antenna with its side lobes in
polar form:
Figure A-5. Radiation Pattern of Directional Antenna
Antenna Beamwidth
The directiveness of a directional antenna. Defined as the angle between two half-
power (-3 dB) points on either side of the main lobe of radiation.
System Characteristics
Receiver Sensitivity
The minimum RF signal power level required at the input of a receiver for certain
performance (e.g. BER).
EIRP (Effective Isotropic Radiated Power)
The antenna transmitted power. Equal to the transmitted output power minus cable
loss plus the transmitting antenna gain.
P
out
Output power of transmitted in dBm
CtTransmitter cable attenuation in dB
GtTransmitting antenna gain in dBi