Patent ID: 6960885

Claim:
An electrodeless discharge lamp using the microwave energy, comprising: a casing having an opening portion at a side thereof; a resonator installed inside the opening portion of the casing, the resonator having an opening portion at a first side thereof and providing a resonance region at which microwave energy resonates; a magnetron for generating the microwave energy and placed inside the casing and having an antenna outputting the microwave energy, the antenna having a projecting direction; a coaxial wave guide, including a conductor installed between the resonator and the magnetron, transmitting the microwave energy from the magnetron to the resonator and having a cylindrical external guide with a path for transmitting the microwave energy an internal guide attached to, and enclosed by a central upper portion of the external guide as to extend in a direction opposite that of the projecting direction of the antenna of the magnetron, the resonator being attached to side portions of the external guide, wherein the external guide is attached to the resonator at an opening portion at a second side of the resonator; a bulb placed inside the resonator and having enclosed fluorescent materials generating light when excited by the microwave energy; and a mesh member installed to the opening portion of the casing, preventing leakage of the microwave energy and passing the light generated in the bulb.