Rf circuit switching

Details Rf circuit switching Rf circuit switching

H - Electricity

03

H

333/4, 351/57

H03H 7/38 (2006.01)

Patent

CA 1235463

18 ABSTRACT "RF CIRCUIT SWITCHING" In an RF circuit comprising an inductive element with an associated electrically-operable switch which may be subjected in use to high RF potentials, for example an inductor (LM) with a short-circuiting switch (SM) thereacross in an antenna tuning unit, the inductive element (LM) comprises a plurality of windings (W1, W2, W3) which electrically are in parallel at RF and mutually isolated at DC, and electrical power for operating the switch (SM) is supplied via the windings (W1, W2, W3) which thus provide RF isolation between the switch (SM) and the source of power. Control signals for the switch (SM) may be supplied via an opto-electronic coupler (OPTO TX/RX) or via an additional winding.

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