Abstract
This paper describes a broad-band parametric amplifier potentially suitable, for example, as the front amplifier in the ground station receiver of advanced satellite communication systems. A single stage with l0db gain at 4 GHZ has given 20% bandwidth to 033 dB points. The amplifier is capable of cryogenic operation for low noise performance and several stages have been cascaded for higher gain. A novel feature of this amplifier is that it employs an idler circuit with a double peaked response. This approach has led to the development of very simple broad-banding controls which can be adjusted under actual operating conditions even when the amplifiers are refrigerated.
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