The microwave solid-state noise diode presented in this paper is designed based on Hines’ avalanche noise theory of Read diode

and Haitz’ and Voltmer’s expression for the noise spectral power density at microwave band.Various design considerations

such as excess noise

avalanche frequency

frequency-dependant excess noise

temperature-dependant excess noise and diode impedance. Based on such a design

a specific solid-state noise diode is developed

whose noise performance is controllable. A microwave coaxial solid-state noise source using this diode is also made

featuring broad bandwidth

small size

light weight

variable noise output and low power consumption.