| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a filter having a good suppression effect for the main operating frequency component and the unnecessary nearby frequency component by storing the tip of an antenna section in the cavity section of a waveguide, and providing a moving pin. SOLUTION: A dielectric substance 10 is connected to the tip section of an antenna section 4 connected to a waveguide 5, and it is stored in a cavity section 8 provided on the opposite side. The shape sizes of the dielectric substance 10 and the cavity section 8 are determined to form a filter structure having the desired performance. A cavity section 11 is provided at the tip section of the dielectric substance 10 so that a moving pin can be slid. The moving pin 9 is freely moved in the cavity section 11, and it can be fixed at an optional position. The shape sizes of the moving pin 9 and the cavity section 11 are determined so that the filter structure has the desired performance.</p> |
