FOLDABLE RADIO WAVE ANTENNA DEPLOYMENT APPARATUS FOR A SATELLITE
The present disclosure describes an antenna that has a parabola-shaped, flexible reflector member and one or more radial ribs embedded in the flexible reflector member and arranged to bias the reflector member in an open state.
1 . (canceled)
2 . A foldable radio wave antenna, comprising:
a foldable reflector member having a shape memory such that the foldable reflector member forms a parabolic shape when in a deployed state, wherein the parabolic shape comprises a peripheral rim, wherein the foldable reflector member is formed from a plurality of layers of material; and
a planar tension member that is coupled with at least a portion of the peripheral rim and that is configured to extend across at least a portion of the foldable reflector member so as to draw the peripheral rim inward to maintain the peripheral rim in a generally circular shape.
3 . The foldable radio wave antenna of claim 2 , wherein:
the planar tension member extends across the at least the portion of the foldable reflector member at an angle that is transverse to a central axis of the foldable reflector member.
4 . The foldable radio wave antenna of claim 2 , wherein:
the foldable reflector member comprises a layer of woven composite fibers combined with an elastomer binder matrix.
5 . The foldable radio wave antenna of claim 4 , wherein:
the composite fibers comprise one or more of fiberglass, carbon fiber, or aramid; and
the elastomer binder matrix comprises one or more of silicone resin, polyurethane, or synthetic rubber.
6 . The foldable radio wave antenna of claim 2 , wherein:
the foldable reflector member comprises an electromagnetically reflective fabric.
7 . The foldable radio wave antenna of claim 2 , wherein:
the multiple layers of material comprise:
a first fiber composite layer;
a second fiber composite layer;
a metal nylon mesh layer positioned between the first fiber composite layer and the second fiber composite layer;
an elastomer layer; and
an aramid layer.
8 . The foldable radio wave antenna of claim 2 , wherein:
the multiple layers of material comprise a plurality of composite fiber layers; and
fibers in each of the plurality of composite fiber layers are oriented at an offset relative to fibers of a nearest respective one of the plurality of composite fiber layers.
9 . A foldable radio wave antenna, comprising:
a foldable reflector member having a shape memory such that the foldable reflector member forms a parabolic shape when in a deployed state, wherein the parabolic shape comprises a peripheral rim, wherein the foldable reflector member is formed from a plurality of layers of material comprising at least one composite fiber layer, at least one electromagnetically reflective layer, and at least one aramid layer; and
a planar tension member that is coupled with at least a portion of the peripheral rim and that is configured to extend across at least a portion of the foldable reflector member so as to draw the peripheral rim inward to maintain the peripheral rim in a generally circular shape.
10 . The foldable radio wave antenna of claim 9 , wherein:
the planar tension member is detachably coupled with the foldable reflector member.
11 . The foldable radio wave antenna of claim 9 , further comprising:
a rim element to the peripheral rim; and
a zipper that couples the tensioning member to the rim element.
12 . The foldable radio wave antenna of claim 9 , further comprising:
a plurality of radial ribs that are embedded within the foldable reflector member, wherein each of the plurality of radial ribs is configured to bias the foldable reflector member toward an open parabola shape when unconstrained.
13 . The foldable radio wave antenna of claim 12 , wherein:
the foldable reflector member is foldable in a rolled arrangement forming a conical frustum such that the plurality of radial ribs are roughly aligned with a longitudinal axis of the conical frustum.
14 . The foldable radio wave antenna of claim 9 , wherein:
the planar tension member comprises an annular element that spans at least a portion of interior space defined by the peripheral rim.
15 . The foldable radio wave antenna of claim 9 , wherein:
the at least one electromagnetically reflective layer comprises metal nylon mesh.
16 . A method of assembling a foldable radio wave antenna, comprising:
bonding at least one composite fiber layer, at least one electromagnetically reflective layer, and at least one aramid layer in a parabolic shape to form a foldable reflector member having shape memory, the foldable reflector member comprising a peripheral rim; and
coupling a planar tensioning member to the peripheral rim so as to draw the peripheral rim inward to maintain the peripheral rim in a generally circular shape.
17 . The method of assembling a foldable radio wave antenna of claim 16 , further comprising:
prior to bonding, positioning the at least one composite fiber layer, the at least one electromagnetically reflective layer, and the at least one aramid layer on a mandrel having a desired focal point/diameter ratio.
18 . The method of assembling a foldable radio wave antenna of claim 17 , wherein:
the desired focal point/diameter ratio is between about 0.25 and about 0.30.
19 . The method of assembling a foldable radio wave antenna of claim 16 , wherein:
bonding comprises applying one or more of heat or a vacuum to the at least one composite fiber layer, the at least one electromagnetically reflective layer, and the at least one aramid layer.
20 . The method of assembling a foldable radio wave antenna of claim 16 , further comprising:
embedding a plurality of radial ribs between at least two of the layers of the foldable reflector member.
21 . The method of assembling a foldable radio wave antenna of claim 16 , wherein:
coupling the planar tensioning member to the peripheral rim comprises one or more of closing a zipper or using a ring of elastomeric material to secure the planar tensioning member to the peripheral rim.