Coating for a surface subject to exposure to a high-frequency fi

Details Coating for a surface subject to exposure to a high-frequency fi Coating for a surface subject to exposure to a high-frequency fi

1983-12-19

1985-12-17

O'Keefe, Veronica

Stock material or miscellaneous articles

All metal or with adjacent metals

Surface feature

428671, 428672, B32B 1514

Patent

active

045592810

ABSTRACT:
To prevent interference from secondary electron emission, a base member, as of a waveguide, which in operation is exposed to high frequency electric fields is provided with a coating comprising a rough surface layer having a thickness less than its skin depth, and a further layer of high electrical conductivity between said rough layer and said base member, the thickness of said further layer being substantially larger than its skin depth. The rough layer preferably has a ratio of mean depth to mean pitch of its random corrugations substantially larger than 1:2.

REFERENCES:
"Sekundare Elektronenemission", H. Bruining-Philips' Technische Rundschau, ar. 1938, pp. 80-87.

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