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SUMMARY
1Vol:(1234567890) 3 counter counter measurements (ECM/ECCM) systems, and space communications applications. To avoid confusion between the field of power amplifiers (PAs) for space applications and the effective way of combining amplifiers, SPAs should be named wave front amplifiers (WFAs). With the available RF output power of solid-state devices, an SPA is confined to output power levels less than some kilowatt at X band, even less for higher operating frequencies. Considering the output power as the only important aspect of power amplifiers, the vacuum tube technology has the leadership since extremely high . . .
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