| 摘要 |
<p>In a magnetron, two rods (23, 25) are supported by a stem (7) in cantilever fashion and a filament (35) (cathode) is connected between two end hats (27, 29) attached to two free ends of the rods (23, 25). Therefore, these two rods (23, 25) are apt to be vibrated by an external force (e.g. an air screwdriver) during assembly or in transit. To suppress relative displacement of the two rods (23, 25) of magnetron due to external force, the natural frequency of the first vibration system composed of a first rod (23) and a first end hat (27) is determined substantially equal to that of the second vibration system composed of a second rod (25) and a second end hat (29).</p> |
