User Manual

18 | Page
APPENDIX 2
The horizontal I
h
and vertical I
v
space antenna isolation for a scenario as in Figure 6 can be
computed analytically, using the following equations:
I
h
[
db
]
= 22 + 20log 
dh f
3 10
8
GTx GRx
*Under assumptions of far field condition)
I
v
[
db
]
= 28 + 40log 
dv f
3 10
8
GTx GRx
I
slant
[
db
]
= (I
v
I
h
) 

90°
+ I
h
Antenna Separation variable definitions:
I
h
[dB]
isolation between horizontally separated transmitter and receiver antennas
dh
[m]
the horizontal distance from the centre of interferer antenna to that of the
interfered with receiver antenna
dv
[m]
the vertical distance from the interferer antenna to the interfered with receiver
antenna, (measured from radiation center-to-radiation center)
f [Hz]
the wavelength of the interfered with system frequency band
GTx [dBi]
gain of the transmitter antenna
GRx [dBi]
gain of the receiver antenna
I
v
[dB]
Isolation between vertically separated transmitter and receiver antennas.
[
°
]
arctan(
dv
dh
)