K-Band Adjustable Noise Generators

摘要

K-band (18-37 GHz) adjustable noise generators based on waveguide matched loads are presented. The physical temperature of the load absorber is maintained at a specified level with accuracy no more than ±0.007 K by a digital multichannel temperature-stabilized system. The units are easy-to-manufacture, reliable in operation, and can be used for calibrating noise parameters of microwave radiometers and for studying their long-term gain stability.