Solid state S-band power oscillator

[Spehro Pefhany]

What do you folks think is the best efficiency that can practically be
achieved (DC-microwave) in a solid state (not magnetron) S-band power
oscillator, say 50 - 150W output?


Best regards,
Spehro Pefhany

 

[Rene Tschaggelar]

What do you folks think is the best efficiency that can practically be
achieved (DC-microwave) in a solid state (not magnetron) S-band power
oscillator, say 50 - 150W output?

The specification of the frequency could be a bit tighter. The
output power is traded against the quality of the resonator. At
microwave frequencies, a Gunn doesn't behave that bad. In the
order of 100mW are achievable for a resonator which is as stable
as 1E-6. If output power is the main concern, a piece of metal
with a hole will do, the frequency will not be that stable then.

Rene

 

[Spehro Pefhany]

The specification of the frequency could be a bit tighter. The
output power is traded against the quality of the resonator. At
microwave frequencies, a Gunn doesn't behave that bad. In the
order of 100mW are achievable for a resonator which is as stable
as 1E-6. If output power is the main concern, a piece of metal
with a hole will do, the frequency will not be that stable then.

Rene

Say 2.5 GHz, give or take, and frequency stability is not very
important. But 0.1W is a long ways from 150W CW, and power efficiency
is the main concern.


Best regards,
Spehro Pefhany

 

[legg]

Say 2.5 GHz, give or take, and frequency stability is not very
important. But 0.1W is a long ways from 150W CW, and power efficiency
is the main concern.

Isn't a power oscillator really an oscillator tapped to provide signal
to a power stage? Even 50dBm TWTs need excitement in the 0dBm range,
They are not, in themselves, oscillators.

RL

 

[Spehro Pefhany]

Isn't a power oscillator really an oscillator tapped to provide signal
to a power stage? Even 50dBm TWTs need excitement in the 0dBm range,
They are not, in themselves, oscillators.

RL

Is there any efficiency savings that can be achieved over just an
amplifier with external excitation? Maybe not.

 

[legg]

Is there any efficiency savings that can be achieved over just an
amplifier with external excitation? Maybe not.

The whole idea behind a 'power' oscillator is that it can deliver the
power - otherwise the lower the circulating energy, the better, if
oscillation is all that is required.

RL