Antenna dish

• US 4,578,682 A
• Filed: 03/20/1984
• Issued: 03/25/1986
• Est. Priority Date: 03/20/1984
• Status: Expired due to Fees

• Current Assignee: Raydx Satellite Systems Limited
• Original Assignee: Raydx Satellite Systems Limited
• Inventors: Yonge, Lawrence W. III, Hooper, Robert L.
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US06/591,421
• Time in Patent Office: 735 Days
• Field of Search: 343/912, 343/915, 343/916, 343/840
• US Class Current: 343/916
• CPC Class Codes: H01Q 15/161 Collapsible reflectors

Abstract

An antenna dish structure is disclosed having a central support to which are attached a plurality of elongated ribs extending radially outwardly with a plurality of metallic mesh members extending between adjacent pairs of rib, and a rim structure connected to the outer ends of the ribs, with both the ribs and the rim having portions for receiving therewithin such mesh members.

Claims

1. An antenna dish, such as may be used for reflecting and focusing electromagnetic signals such as television signals transmitted from satellites for reception and use, comprising

centrally disposed supporting means for supporting the components of the dish;

a plurality of elongated forming ribs, each comprising a tubular member that is bent prior to assembly of said dish to form a portion of generally parabolic curve, each said tubular rib having formed integrally therewith mesh receiving portions comprising at least one recess extending inwardly of said tubular member and generally parallel to said parabolic surface thereof for receiving a portion of metallic mesh therewithin, each said rib being attached at one end thereof to said centrally disposed supporting means and extending generally radially outwardly therefrom;

a plurality of foraminous metallic mesh members each formed of a mesh material reflective of said signal and extending between a pair of adjacent said forming ribs and received within said mesh receiving portions thereof and each extending radially outwardly continuously from a position adjacent said centrally disposed supporting means to a position adjacent the end of said ribs distal said supporting means; and

rim means connected to the end of said forming rib distal said supporting means, whereby the mesh members and ribs extending continuously outwardly from the centrally disposed supporting means form a generally parabolic dish structure for reflecting and focusing such signals.

2. The antenna dish of claim 1 wherein each said tubular rib member comprises an extrusion having said mesh receiving recess formed integrally within said extrusion.

3. The antenna dish of claim 2 wherein said rib tubular member has a generally rectangular cross section with two opposed surfaces thereof being generally planar and two other mutually opposed surfaces thereof being bent into said generally parabolic curve.

4. The antenna dish of claim 3 wherein said mesh receiving portion of said rib tubular member comprises at least one recess extending inwardly of said tubular member and generally parallel to said generally parabolically bent surfaces thereof.

5. The antenna dish of claim 4 wherein said mesh receiving portion of said rib tubular member comprises two mutually opposed said recesses adjacent one of said generally parabolically bent surfaces.

6. The antenna dish of claim 5 wherein each said recess is defined by a pair of mutually opposed, generally parallel surfaces spaced apart a distance approximating the thickness of said mesh member received therewithin, with at least one of said recess surfaces having a plurality of projections extending outwardly therefrom, whereby the projections may engage portions of the mesh member to retain that mesh member within the recess.

7. The antenna dish of claim 1 wherein said rim means comprises a generally circular member having a generally L-shaped cross section with two generally orthogonal portions.

8. The antenna dish of claim 11 wherein said rim circular member is formed such that a first one of said orthogonal portions is generally parallel to adjacent portions of said received mesh member, whereby that surface of the rim circular member serves as an additional portion of the reflecting and focusing surface of the antenna dish.

9. The antenna dish of claim 8 wherein said rim means mesh receiving portion comprises a recess in said circular member extending generally parallel to and adjacent said first orthogonal portion.

10. The antenna dish of claim 9 wherein said circular member recess is defined by a pair of mutually opposed and generally parallel surfaces spaced apart a distance approximating the thickness of said mesh member received therewithin, with at least one of said recess surfaces having a plurality of projections extending outwardly therefrom, whereby the projections may engage portions of the mesh member to retain that mesh member within the recess.

11. The antenna dish of claim 7 wherein said rim means includes a mesh receiving portion for receiving therewithin the portion of each said mesh member distal said supporting means.