INTEGRALLY-WOUND ANTENNA HELIX-COILFORM

• US 3,828,353 A
• Filed: 02/05/1973
• Issued: 08/06/1974
• Est. Priority Date: 02/05/1973
• Status: Expired due to Term

• Current Assignee: ITT Corporation (ITT, Inc.)
• Original Assignee: Charles P. Majkrzak, Michael S. Polgar
• Inventors: Majkrzak, Charles P., Polgar, Michael S.
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US05/329,776
• Time in Patent Office: 547 Days
• Field of Search: 343/895,873
• US Class Current: 343/873
• CPC Class Codes: H01F 17/00 Fixed inductances of the signal type coils in general H01F5/00; inductors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof and multistep manufacturing processes therefor H01L28/10
• CPC Class Codes: H01F 29/06 with current collector gliding or rolling on or along winding
• CPC Class Codes: H01F 30/08 without magnetic core
• CPC Class Codes: H01F 41/04 for manufacturing coils coils for transformer or inductances H01F27/28
• CPC Class Codes: H01Q 9/14 Length of element or elements adjustable telescopic elements H01Q1/10

Abstract

This concerns the fabrication of an integrally-wound helixcoilform assembly for an antenna of, for example, the high voltage and high power tunable helix-cylinder (inductance/capacitance) monopole type. Preassembled on a collapsible, cylindrically-shaped mandrel are a wound helix of controlled pitch, an end coupling to which the helix is affixed at one end, and a binding post securing the other end of the helix wire. After the entire assembly is enclosed in a plastic covering such as teflon shrink tubing or adhesive-backed tape helically wound to a predetermined tension and pattern, cycloaliphatic epoxy resin-saturated glass fibers are wound in a carefully controlled manner over the entire assembly in a predetermined pattern and then cured. The tensioned plastic covering together with the controlled winding of glass fibers provides for the interlaminar shear faces of the coilform structure type to be formed as convolutions between the helix turns, thus giving rise to an integrally-constructed assembly far superior both structurally and electrically.

Claims

2. The arrangement of claim 1 wherein said dielectric covering comprises epoxy-saturated glass fibers having a smooth and continuous interface between the glass fibers of the coating and the turns of the helix.

3. The arrangement according to claim 2 further comprising a layer of heat shrinkable plastic intermediate the turns of said helix and said epoxy-saturated glass fibers whereby said epoxy is prevented from direct contact with said helix.