Capacitively Coupled High-Pressure Lamp Using Coaxial Line Networks

This paper describes the development of a capacitively coupled high-pressure lamp with input power between 20 and 43 W at 2.45 GHz, using a coaxial line network. Compared with other electrodeless lamp systems, no cavity has to be used and a reduction in the input power is achieved. Therefore, this l...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2016-10, Vol.64 (10), p.3363-3368
Main Authors: Schopp, Christoph, Doll, Timo, Graeser, Ulrich, Harzheim, Thomas, Heuermann, Holger, Kling, Rainer, Marso, Michel
Format: Article
Language:English
Subjects:
Circuit simulation
coaxial
de-embedding
Diodes
electromagnetic simulation
FEM
Ignition
Impedance
Lighting
microwave plasma
Microwave theory and techniques
modeling
plasma
Plasma measurements
Plasmas
Transmission line measurements
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Summary:This paper describes the development of a capacitively coupled high-pressure lamp with input power between 20 and 43 W at 2.45 GHz, using a coaxial line network. Compared with other electrodeless lamp systems, no cavity has to be used and a reduction in the input power is achieved. Therefore, this lamp is an alternative to the halogen incandescent lamp for domestic lighting. To serve the demands of domestic lighting, the filling of the lamp is optimized over all other resulting requirements, such as high efficacy at low induced powers and fast startups. A workflow to develop RF-driven plasma applications is presented, which makes use of the hot S-parameter technique. Descriptions of the fitting process inside a circuit and FEM simulator are given. Results of the combined ignition and operation network from simulations and measurements are compared. An initial prototype is built and measurements of the lamp's lighting properties are presented along with an investigation of the efficacy optimizations using large signal amplitude modulation. With this lamp, an efficacy of 135 lmW -1 is achieved.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2016.2600326