HP 8530A, Руководство по эксплуатации и программированию, Страница: 131 / 439

Creating a Standard Gain Antenna Cal Denition
Assume the standard gain antenna's graph or table provides 21 decipherable data values across
the 2 GHz frequency span:
Divide the frequency span by number of points 0 1:
2 x 10
9
/ (21 0 1) = 100 MHz
The rst frequency in your antenna denition is the start frequency (2 GHz in this example).
From there , 20 additional points exist, each spaced 100 MHz apart. The rst three frequencies
would be:
2,000,000,000 Hz
2,100,000,000 Hz
2,200,000,000 Hz
The last frequency point would be the stop frequency .
Determining Gain V alues at Each Frequency Increment (Graph F ormat)
Next, you must determine the gain values at each frequency increment. Figure 5-15 shows a
typical graph-style data sheet for a standard gain antenna.
Figure 5-15. Typical Standard Gain Antenna P erformance Graph
1. Choose the start and stop frequencies . Examples shown in Figure 5-15 are 2 and 4 GHz,
respectively .
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