Patent ID: 11909110
Assignee: THE BOEING COMPANY
Field: Materials, metallurgy (Chemistry)
Classification: CPC H  B  Y | IPC B  H

Claim 7:
8. A horn antennae, comprising:
tubular body portion including a plurality of planar wall portions, each wall portion having a plurality of holes, the plurality of wall portions forming a rectangular wavequide portion and a pyramidal horn portion,
a stepped septum extending between two opposing wall portions of the plurality of wall portions in an internal cavity of the wavequide portion, and
a base plate at a bottom end of the wavequide portion, partially occluding the internal cavity of the wavequide portion, and joined to three of the plurality of wall portions,
wherein the tubular body portion, the septum, and the base plate form a single monolithic unit, and
wherein the horn antenna has an operating frequency range and the holes of each plurality of holes are sized and arranged such that the pluralities of holes are effectively opaque in the operating frequency range.