The principles of parametric amplification are discussed. Amplifiers are distinguished from one another in terms of the allowed frequencies and of basic circuit connections. The small-signal and noise properties of varactor diodes are outlined and their effect on amplifier performance is demonstrated. ...
This paper describes gallium arsenide varactor diodes which develop effective values of c over 130 GHz and will operate in double-diode parametric amplifiers at idler frequencies up to 43 GHz. With such diodes it is possible to build wide band amplifiers which give good low noise performance ...
Based on the thermal noise sources in parametric circuits, the theory of noisy four-poles, as presented in Chap.6, is applied to three- and four-frequency converters as well as to (straight-through) amplifiers comprising a circulator or not. Special emphasis is drawn to the minimum noise ...
This device is popular in varied applications such as parametric amplifiers, harmonic generators, and voltage-controlled oscillators (VCOs). The most important property of the device is that its capacitance varies with the applied voltage, and so it may form a voltage-variable capacitive element in...