| 摘要 |
The present invention relates to a wireless frequency filter having a cavity structure, the wireless frequency filter comprising: a housing having a hollow interior and an open surface on one side so as to structure a cavity; a cover for sealing the open surface of the housing; and resonance members located in the hollow space of the housing, wherein the cover is provided with through-holes in the vicinity corresponding to each resonance member, and tuning structures for frequency tuning fitted in a shape to block the through-holes, the tuning structure being made of material having coefficient of thermal expansion which is lower or higher than that of the material of the cover. |
