Coupling structure of waveguide and applicator, and its application to electrodeless lamp

A coupling structure of a waveguide and an applicator comprising:

• an electromagnetic wave generator;
• a waveguide for transmitting an electromagnetic wave generated by the electromagnetic wave generator;
• and
• an applicator for receiving the electromagnetic wave through the waveguide and applying said electromagnetic wave to a load,
• wherein a wall of the waveguide and the applicator is partially or wholly shared, said wall having at least two slots positioned therein, and the interval between a center portion of one slot to that of an adjacent slot is equal to one-fourth of the wavelength of the electromagnetic wave traveling within the waveguide, wherein said at least two slots are disposed along a lengthwise direction of the waveguide, and along a direction that crosses the axial direction of the applicator.

A coupling structure of a waveguide and an applicator comprising:

• an electromagnetic wave generator;
• a waveguide for transmitting an electromagnetic wave generated by the electromagnetic wave generator;
• and
• an applicator having a cross-section with a circular or an oval shape for receiving the electromagnetic wave through the waveguide and applying the electromagnetic wave to a load,
• wherein a wall of the waveguide and the applicator is partially or wholly shared and has one or more slots positioned therein, and the waveguide has a length equal to an integer times one-half the wavelength of the electromagnetic wave traveling within the waveguide.

A coupling structure of a waveguide and an applicator comprising:

• an electromagnetic wave generator;
• a waveguide including two cylinders having an inner wall and an outer wall so as to define a path of rectangular cross-section in order to direct the electromagnetic wave from the electromagnetic wave generator;
• and
• an applicator coupled to the inner wall of the waveguide, said applicator having a cross-section with a circular or an oval shape, a portion of said applicator forming a concentric circle with the waveguide for applying the electromagnetic wave directed from the waveguide to a load.

A coupling structure of a waveguide and an applicator comprising:

• an electromagnetic wave generator;
• a waveguide for transmitting an electromagnetic wave generated by the electromagnetic wave generator;
• and
• an applicator for receiving the electromagnetic wave through the waveguide and applying said electromagnetic wave to a load,
• wherein a wall of the waveguide and the applicator is partially or wholly shared, said wall having one or more slots positioned therein, and the one or more slots are disposed along a lengthwise direction of the waveguide, and along a direction that crosses the axial direction of the applicator.