Model 3140b typical forward power (fp) – ETS-Lindgren 3140B Hybrid Log Periodic and Bowtie (BiConiLog) User Manual
Page 36

Model 3140B Typical Forward Power (FP)
The forward power graphs illustrate the typical forward power required for one,
three, and 10 V/m (with and without 80% amplitude modulation).
•
The graph on page 37 illustrates one meter from the tip of the antenna,
and the graph on page 38 illustrates three meters from the tip of the
antenna.
•
The graphs on page 39 and page 40 illustrate power requirements for
the lower frequencies at three meters based on measurements using a
field probe on an Open Area Test Site (OATS) over both conducting
ground and a (2.4m)
2
ferrite absorber field over conducting ground.
The power shown was measured with 1.5 meter transmit antenna and
probe height and horizontal polarization. Horizontal polarization
represents the worst-case power requirement; typically less power is
required for vertical polarization. In practice, many users place ferrite
tiles on the ground between the antenna and probe to reduce
reflected-ray interference. For any other field strength E, multiply the
power in watts for 1 V/m by E
2
.
36 |
Typical Data