Microwave cavity and double-waveguide microwave plasma lamp

Abstract

The invention discloses a microwave cavity and a double-waveguide microwave plasma lamp comprising the microwave cavity. The microwave cavity is used for preventing the microwave from leaking and emits a generated ray. The microwave cavity comprises two short circuit plates, a first waveguide and a metal shielding net, wherein the short circuit plates are used for preventing the microwave from leaking and reflecting the generated ray; the first waveguide is used for stimulating the microwave so as to generate the ray and reflect the generated ray; the metal shielding net is used for preventing the microwave from leaking and emitting the generated ray out of the microwave cavity; and the two short circuit plates, the metal shielding net and the first waveguide form a closed cavity. The waveguide stimulation technology is adopted in the microwave cavity and the double-waveguide microwave plasma lamp, the stimulation effect is good, and the ray can be effectively emitted to the external space. Meanwhile, the microwave cavity and the double-waveguide microwave plasma lamp have the advantages of low processing difficulty, small volume, light weight and low manufacture cost.

Description

technical field [0001] The invention relates to the field of electric light sources, in particular to a microwave cavity and a double-waveguide microwave plasma lamp including the microwave cavity. Background technique [0002] Existing microwave plasma lamps generally include magnetrons for generating microwaves, waveguides for coupling and transmitting microwaves, resonant cavities coupled through slits or holes, and electrodeless bulbs. The electrodeless bulb is placed in the resonant cavity and is excited by microwaves to generate light. The resonant cavity needs to be processed into a geometry with a certain rotational speed (such as a cylinder, etc.), and must be a mesh structure with high light transmittance characteristics. Therefore, the processing difficulty is higher. The microwave plasma lamp with this resonant cavity is bulky, heavy and expensive. [0003] Chinese patents ZL99241233.1 and ZL01274852.8 disclose another microwave plasma lamp. The microwave reso...

AI Technical Summary

Problems solved by technology

The disadvantage of this microwave plasma lamp is that at the waveguide port where the electrodeless bulb is located, because the E side of the rectangular waveguide is wider, the electric field strength is weaker, which affects the excitation effect

In addition, the position of the electrodeless bulb prevents part of the light from being emitted to the external space, which affects the lighting effect

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