H - Electricity – 03 – D
Patent
H - Electricity
03
D
325/116
H03D 9/06 (2006.01) H01P 5/16 (2006.01) H03D 7/02 (2006.01) H03D 7/14 (2006.01)
Patent
CA 1218416
ABSTRACT: In an R.F. circuit with at least one R.F. trans- mission line (15, 13) comprising a ground plane (13) on an insulating substrate (3) and with two diodes (24, 25) res- pectively D.C.-connected to two portions (38, 39) of the ground plane (13) mutually D.C.-isolated by a slot (37) therein to enable the diodes (24, 25) to be biased, the substrate (3) is mounted in a housing (1, 2) of conductive material, and the two portions (38, 39) of the ground plane (13) are mutually R.F.-coupled via the conductive material, one of the portions (39) being conductively con- nected to an adjacent housing member (2) and the other portion (38) being separated therefrom by a thin insulating layer. The slot (37) is such as to inhibit coupling of R.F. energy out of the circuit into the slot (37), suit- ably being very narrow, e.g. 20/um, so as to form a further transmission line with a very low characteristic impedance and also to have a high attenuation along its length for operation at mm-wavelengths.
435159
Ballard Philip M.
Bates Robert N.
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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