| 摘要 |
A launcher for microwave radiation comprises an elongate guide part, a surround part which surrounds a length of the guide part, at least one inwardly facing baffle provided on an inner face of the surround part and extending towards the guide part; and at least one outwardly facing baffle provided on an outer face of the guide part which is spaced axially along the guide part relative to the at least one inwardly facing baffle and faces outwards towards the inner surface of the surround part. The baffle(s) together with the guide part and the surround part define a labyrinth seal which in use acts as a choke to prevent microwaves escaping by passing though the gap between the guide part and surround part, and are arranged so that in at least one position of the surround part and the guide part there is no direct mechanical path from the surround part to the guide part, the parts being free to move relative to one another in at least one direction from that position without creating a direct rigid mechanical path from the surround to the guide part.
|
