Patent ID: 11949140
Assignee: NEC NETWORK AND SENSOR SYSTEMS, LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A pillbox-type RF window having an input/output window in a microwave tube, the pillbox-type RF window comprising:
a disc-shaped member having a metallization layer formed on an outer peripheral portion of a disc-shaped ceramic body;
a pair of ring-shaped members constituted by metal bodies having outer diameters that are substantially equal to that of the disc-shaped member, arranged to sandwich the disc-shaped member from both sides of the disc-shaped member, and integrated with the outer peripheral portion of the disc-shaped member;
a tube-shaped member constituted by a metal body having an inner diameter substantially equal to the outer diameters of the pair of ring-shaped members and the disc-shaped member, for holding a pair of metal components and the disc-shaped member on an inside thereof; and
a restriction member for suppressing rotation between the ring-shaped members and the tube-shaped member, wherein
the restriction member comprises:
a protrusion protruding in a radially outward direction on the pair of ring-shaped members; and
a notch, formed in the tube-shaped member, into which the protrusion is inserted, and
the restriction member suppresses the rotation of the tube-shaped member in a circumferential direction about an axis of the tube-shaped member with the protrusion inserted into the notch.