High-efficiency millimetre-wave silicon impatt oscillators |
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Authors: | Gokgor H.S. Davies I. Howard A.M. Brookbanks D.M. |
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Affiliation: | Plessey Research (Caswell) Ltd., Allen Clark Research Centre, Towcester, UK; |
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Abstract: | High-efficiency impatt devices and oscillators have been fabricated from epitaxially grown silicon for operation in the frequency range 40?140 GHz. These devices have produced world state-of-the-art efficiencies and demonstrated the expected relative frequency insensitivity of silicon. Single drift devices have given efficiencies of approximately 8%; and double drift device efficiencies as high as 13.5% at 50 GHz and 12% at 90 GHz. Initial measurements show that the sideband phase noise levels follow a constant deviation law. |
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