Microwave impedance matching strategies of an applicator supplied by a bi-directional magnetron waveguide launcher.
It is shown that a bi-directional waveguide launcher can be used advantageously for reducing the reflection coefficient mismatch of an input impedance of an applicator. In a simple bi-directional waveguide launcher, the magnetron is placed in the waveguide and generates a nominal field distribution with significant output impedance in both directions of the waveguide. If a standing wave is tolerated in the torus, which connects the launcher and the applicator, the power transfer from the magnetron to the applicator can be optimal, without using special matching devices. It is also possible to match the bi-directional launcher with two inductance stubs near the antenna of the magnetron and use them for supplying a two-input applicator without reflection.
Roussy
Georges
G
Laboratoire de Spectroscopie et des Techniques Microondes, Université Henri Poincaré, Nancy, Vandoeuvre Les Nancy, France.
Kongmark
Nils
N
D017076:Computer-Aided Design; D003296:Cooking / Q000295:instrumentation* / Q000379:methods; D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005511:Food Handling / Q000295:instrumentation* / Q000379:methods; D006361:Heating / Q000295:instrumentation* / Q000379:methods; D008872:Microwaves