| 摘要 |
<p>PURPOSE:To let discharge take place without any electrode, by placing a non- electrode discharge tube filled with a gas in a folded type wave guide with holes which are smaller than lambda/2 and provided at the maximum electric field portion and introducing a microwave in the wave guide. CONSTITUTION:A wave guide 1 is periodically folded and has a discharge tube 3 running through holes 2 provided in the center portions of the bulkheads of the wave guide. A strong electric field is applied to the discharge tube running through the center portions of the wave guide 1 and discharge takes place without any electrode. Besides, a microwave propagates as a progressive wave in the wave guide which has the folded structure and the discharge tube is placed at the strong electric field portion, so that the long discharge tube can make uniform radiant light emission.</p> |
