4 GHz Low Noise Parametric Amplifier

A rugged and reliable 4 GHz uncooled parametric amplifier is presented. The solution is particularly suited to domestic systems and for installations where cost of maintenance is a problem. It complies with the specifications for ground stations operating with Intelsat Satellites. Some features are: 1) a low pump frequency of 44 GHz from a reliable Gunn Oscillator operating at 11 GHz followed by a X4 multiplier. 2) a unique gain stability, particularly long term, assured by a very effective loop. 3) a compact and reliable 4 GHz W/G circulator with very low noise contribution and with intrinsic rejection of spurious signals generated by the transmitter. Design criteria and the principal parts of the project, as well as the results obtained will be described in the paper.