THIN SANDWICH TELEMETRY ANTENNA

• US 3,823,404 A
• Filed: 05/09/1973
• Issued: 07/09/1974
• Est. Priority Date: 05/09/1973
• Status: Expired due to Term

• Current Assignee: Harold B. Buie Jr
• Original Assignee: Harold B. Buie Jr
• Inventors: Buie, Harold B. Jr.
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US05/358,552
• Time in Patent Office: 426 Days
• Field of Search: 343/767,769,770,708 333/84M
• US Class Current: 343/708
• CPC Class Codes: H01Q 1/286 substantially flush mounted with the skin of the craft
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 13/26 Surface waveguide constituted by a single conductor, e.g. strip conductor

Abstract

A thin sandwich slot antenna is provided which produces a cardiod shaped antenna pattern. The antenna structure requires no antenna cavity or other remote structure behind the antenna. A thin-film antenna is supported by a thin dielectric strip and contoured to the shape of support structure. A metallic support structure becomes the ground plane for the antenna otherwise a metallic ground plane is placed behind the radiating element.

Claims

1. A high frequency antenna for use at a wavelength lambda , including a thin film conductive sheet having parallel rectangular slots therein, said slots being separated by an elongated strip of said conductive sheet, said elongated strip being disposed for impedance coupling of radiant frequency energy, and said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda .

2. An antenna as set forth in claim 1 wherein said slots are joined at one end by a gap which separates one end of said elongated strip from the remainder of the conductive sheet, and wherein the thin film dimensions are not more than 1/5 lambda in length and 3/50 lambda in width.

3. A high frequency antenna as set forth in claim 2 wherein said antenna is comprised of a copper foil not more than 0.01 inches thick.

4. The antenna as set forth in claim 3 wherein said elongated strip is approximately the same width as said slots.

5. A high frequency transmitting and receiving antenna system for substantially conforming to the configuration of supporting substrate and comprising:

a conductive foil antenna having parallel slots therein for receiving and transmitting radiant energy, said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda , thin film dielectric support means bonded to one surface of said conductive foil, a substrate support means and ground plane attached to said dielectric film and coupled to a portion of said antenna foil.

6. An antenna system as set forth in claim 5 and further comprising an elongated strip of said antenna foil being disposed between adjacent slots for coupling radiant energy thereto and thereby developing radiant energy across said slots.

7. An antenna system as set forth in claim 6 wherein said substrate ground plane is the outer surface of a missile and said antenna foil is fixably disposed along a contoured surface thereof for radiating or receiving energy from a selected direction with respect to the missile axis.