Apparatus for coupling electromagnetic radiation from a waveguide to an electrodeless lamp
Patent 5448135 Issued on September 5, 1995. Estimated Expiration Date: 
October 28, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 28, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2633493 3478282 Coaxial line to double ridge waveguide transition Method and apparatus for igniting electrodeless discharge lamp Device for achieving minimal reflections in antenna coupling Electrodeless microwave-generated radiation apparatus Patent #: 5039918 InventorApplicationNo. 141961 filed on 10/28/1993US Classes:315/39, Discharge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable)315/248, Induction-type discharge device load333/26Having long line elementsExaminersPrimary: Lee, BennyAttorney, Agent or FirmForeign Patent References
International ClassesH01P 005/103H01J 065/04 AbstractApparatus for coupling electromagnetic energy to electrodeless lamps. A waveguide having one end connected to a source of electromagnetic radiation was closed at the second opposite end. A coupling device at the second end couples microwave energy from the waveguide to an electrodeless lamp. The coupling device includes a coaxial transmission line having a center conductor extending through one of the walls of the waveguide adjacent the second end. An alcove partition within the waveguide contacts the extending conductor and forms an alcove in the waveguide. The alcove portion provides for an impedance matching structure between the transmission line and waveguide. The electrodeless lamp which is positioned above the free end of the coaxial transmission line is excited with the coupled microwave energy.Other References
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