| 摘要 |
PURPOSE:To obtain a small sized device without power source, by performing drying through the use of diffusion of water contained in air due to the difference of relative humidity. CONSTITUTION:A horn 1 and a waveguide 3 are always closed, and a case 8 with a drying agent 7, the horn 1 and the waveguide 3 are connected. In this case, the water contained in the waveguide 3 flows to the case 8 via the joint 4 and the horn 5 until the relative humidity in the case 8, horn 1 and waveguide 3 reaches an equilibrium. Thus, the inside of the horn 1 and the waveguide 3 is kept always dry through the agent 7. Further, when the horn is installed to the outside of the room, the internal pressure of the horn is changed by the change in ambient temperature and to prevent the generation of electromagnetic wave interference through the shrinkage of a horn cover 2 and invasion of moisture from the surrounding of the cover, a pressure adjusting bag 15 is connected to a hose 5 to keep the internal and external pressure equal. The case can easily be fitted and removed, the refreshing of the drying agent is simplified and the device is made small in size. |
