PTP 800 Series User Guide
Radiat ion hazard assessm ent
phn- 2513_004v000 ( Oct 2012)
4- 87
Calculation
Calculation is used to identify the Compliance Boundary; outside this boundary the
radiation levels meet the Basic Restriction, which is defined in
1999/519/EC
as 10 W/m
2
.
The distance from the antenna at which the Power Flux Density limit is equal to some
specified value is calculated using the Cylindrical Wave model as follows:
π∂
δ
π
Dd
P
S
180
.
=
Where S = Power density (W/m
2
), P = Maximum average transmit power capability of the
radio (Watts), D = Antenna diameter (meters), d = Distance from point source (meters),
δ
= 3 dB antenna beamwidth (degrees).
Rearranging terms to solve for distance yields:
δ
π
D
S
P
d
180
.
=
Distances from antenna
specifies calculated minimum separation distances for a range of frequency
bands and antenna sizes at the peak of the antenna beam. At these and greater distances,
the power density from the RF field is not considered to be hazardous.
Ta ble 2 1 0
PTP 800 m inim um separat ion dist ances, ETSI m et hod
Ba n d
An t e n n a dia m e t e r
0 .3 m
( 1 ft )
0 .6 m
( 2 ft )
0 .8 m
( 2 .5 ft )
1 .2 m
( 4 ft )
1 .8 m
( 6 ft )
6 GHz
N/A
N/A
N/A
1.7 m
1.8 m
7 and 8 GHz
N/A
2.0 m
2.2 m
2.2 m
2.1 m
11 GHz
N/A
1.8 m
2.2 m
2.0 m
1.8 m
13 GHz
1.6 m
1.4 m
1.4 m
1.5 m
1.4 m
15 GHz
1.8 m
1.5 m
1.6 m
1.6 m
1.6 m
18 GHz
2.1 m
1.6 m
1.7 m
1.9 m
1.6 m
23 GHz
2.0 m
1.8 m
2.0 m
2.0 m
2.0 m
26 GHz
2.4 m
2.0 m
2.3 m
2.5 m
N/A
32 and 38 GHz
2.4 m
2.1 m
N/A
N/A
N/A
Summary of Contents for PTP 800 Series
Page 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Page 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Page 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Page 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Page 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Page 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...