Some properties of Gunn-effect oscillations in a biconical cavity

Hobson, G.S.

doi:10.1109/t-ed.1967.15999

Cited by 20 publications

(3 citation statements)

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“…The electron density fluctuations have a Poisson distribution (Hobson 1968) so that the probability of a fluctuation appreciably greater than the r.m.s. value is small.…”

Section: The Initial Space-charge Fluctuation and The Dimensions Of T...mentioning

confidence: 99%

“…The application of this theory to 10 GHz oscillators with a length of about 10 pm is suspect. Figure 5 shows that the space-charge growth time in 1 i 2 cm material, typically used to construct gallium arsenide Gunn oscillators (n N 1015 cm-3, T~ N 10-12 s), for a bias just above threshold is about 2 x 10-11 s. This is 20 % of a period of 10 GHz oscillation and does not include the time of large-signal space-charge readjustment (Hobson 1966). The implicit assumption in the f.m.…”

Section: Consequence Of the Nucleating Region Dimensions And The Time...mentioning

confidence: 99%

“…Space-charge fluctuations set a limit to the allowable space-charge growth in L.S.A. oscillators (Hobson 1968). As with the f.m.…”

Section: Lsa Oscillationsmentioning

confidence: 99%

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Three-dimensional limitations on space-charge growth in transferred-electron devices

Hobson

1969

J. Phys. D: Appl. Phys.

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The influence of diffusion and the lateral dimensions on the growth of space-charge non-uniformities from random electron density fluctuations is calculated for a negative differential resistance material. The effect of these considerations on the performance of some transferred-electron devices is then presented. The f.m. noise performance of Gunn oscillators was overestimated by 13 dB in a previous calculation, and the allowable space charge growth in limited space-charge accumulation oscillators was underestimated. It is concluded that fully formed domains do not exist in uniform short (similar, equals 10 μm) Gunn effect devices.

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“…The electron density fluctuations have a Poisson distribution (Hobson 1968) so that the probability of a fluctuation appreciably greater than the r.m.s. value is small.…”

Section: The Initial Space-charge Fluctuation and The Dimensions Of T...mentioning

confidence: 99%

Section: Consequence Of the Nucleating Region Dimensions And The Time...mentioning

confidence: 99%