Rieke diagrams for avalanche diodes show performance as a function of load

Two Rieke diagrams are presented for typical avalanche diodes at 10.859 and 8.217 GHz. Four photographs of the output spectrum are also included to show noise characteristics as a function of load. The noise of the output spectra is greatest where the gradient of the frequency-pulling contours is large and the noise is least where the gradient of the frequency-pulling contours is small.