H - Electricity – 03 – L
Patent
H - Electricity
03
L
333/41
H03L 5/02 (2006.01) H01J 37/32 (2006.01) H03H 7/40 (2006.01)
Patent
CA 1192278
ABSTRACT OF THE DISCLOSURE An R.F. generator for providing power to a load via a trans- mission line wherein load impedance is automatically matched to the surge impedance of the transmission to provide maximum transfer of energy from the generator to the load. Voltages representative of input power and reflected power are utilized to control a load match circuit to cause load impedance to equal transmission line impedance. The load match circuit includes first and second vari- able capacitors and respective stepping motors for varying their capacity. Bi-directional couplers provide voltage outputs pro- portional to forward and reflected power, and a transmission line connects the bi-directional couplers to the load match circuit. A control circuit is connected to receive the outputs from the coupler means proportional to forward and reflected power and is connected to the load match circuit for energizing the stepping motors to vary the capacitors to cause apparent load impedance to automatically match the surge impedance of the transmission line whereby reflected power is reduced substantially to zero regardless of variations of load impedance.
392018
Osler Hoskin & Harcourt Llp
Perkin-Elmer Corporation The
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