Waveguide horn antenna
AssigneeUtah State University Space Dynamics Laboratory
InventorBryan Jon Willis
Life of this patent
Estimating the term…
Abstract
For improved Ku band communications, an antenna system includes a planar antenna surface, at least one waveguide feed network, and a waveguide. The planar antenna surface is coupled to at least one port. The at least one waveguide feed network includes an H plane junction splitter and at least two E plane junction splitters. The H plane junction splitter is disposed on a channel septum in a channel. A splitter axis of the channel septum and the H plane junction splitter is rotated about a P axis. The at least two E plane junction splitters are each disposed on septum and coupled to the H plane junction splitter via the channel. The waveguide is coupled to the waveguide feed network.
Claims19
An antenna system comprising:
- a planar antenna surface coupled to at least one port;
- at least one waveguide feed network comprising:
- a first channel septum in a channel, the first channel septum having an oval profile and a planar slope in a direction to a proximal end;
- an H plane junction splitter disposed on the first channel septum along a splitter axis with a top edge parallel the splitter axis and a rectangular profile orthogonal to the splitter axis, wherein the splitter axis of the first channel septum and the H plane junction splitter is rotated about a P axis;
- at least two E plane junction splitters each disposed on a second and a third channel septum, respectively, and coupled to the H plane junction splitter via the channel, wherein the second channel septum and first E plane junction splitter are shifted along a positive P axis from a center of the channel to divide power from the first E plane junction splitter unequally without changing phase, a proximal end of the channel septum closer to the second channel septum and first E plane junction splitter than the third channel septum and second E plane junction splitter, and the third septum and second E plane junction splitter are centered on the channel to maintain an equal amplitude taper;
- and
- a waveguide coupled to the waveguide feed network.
A waveguide feed network comprising:
- a first channel septum in a channel, the first channel septum having an oval profile and a planar slope in a direction to a proximal end;
- an H plane junction splitter disposed on the first channel septum along a splitter axis with a top edge parallel the splitter axis and a rectangular profile orthogonal to the splitter axis, where in the splitter axis of the first channel septum and the H plane junction splitter is rotated about a P axis;
- and
- at least two E plane junction splitters each disposed on a second and a third channel septum, respectively, and coupled to the H plane junction splitter via the channel, wherein the second channel septum and first E plane junction splitter are shifted along a positive P axis from a center of the channel to divide power from the first E plane junction splitter unequally without changing phase, a proximal end of the channel septum closer to the second channel septum and first E plane junction splitter than the third channel septum and second E plane junction splitter, and the third septum and second E plane junction splitter are centered on the channel to maintain an equal amplitude taper.
Dependencies are inferred from the claim text.