| 摘要 |
<p>An electrodeless lighting system includes a resonator (60) installed at an outlet (402) of a waveguide (40) guiding microwave energy generated from a magnetron (20) and defining a cavity allowing light to pass therethrough while resonating microwave therein, a bulb (50) positioned in the resonator (60) and enclosing a radiation mat erial for emitting light by the microwave energy and one or plural microwave concentrating units (90) installed at the inner circumferential surface of the resonator (60) and concentrating microwave energy discharged from the outlet (402) of the waveguide (40) to the bulb (50). By concentrating microwave to electrodeless plasma bulb (50) positioned inside the resonator (60), stability in an initial lighting and light efficiency can be enhanced.
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