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Radar System Engineering

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342 THE MAGNETRON AND THE PULSER [SEC. 105<br />

and the high efficiency of magnetrons even at very short wavelengths.<br />

Thepulse powers available extend over a range of 105 (0.02 kwto2000<br />

kw)<br />

Frequency in Me/see<br />

FIG. 10,18.—Diagramshowing power and frequency distributionof representative microwave<br />

magnetronsdeveloped up to 1945.<br />

The demands of microwave radar resulted in a rather extensive<br />

development of magnetrons whose frequencies are concentrated more or<br />

less into two bands. Figure 10.18 shows on a logarithmic chart the frequency<br />

and pulse power of magnetrons that have been prodllred in

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