ANTENNA FOR AIRBORNE SATELLITE COMMUNICATIONS

• US 3,811,127 A
• Filed: 08/10/1972
• Issued: 05/14/1974
• Est. Priority Date: 08/10/1972
• Status: Expired due to Term

• Current Assignee: Leslie V. Griffee, Mardis V. Anderson
• Original Assignee: Leslie V. Griffee, Mardis V. Anderson
• Inventors: Griffee, Leslie V., Anderson, Mardis V.
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US05/279,590
• Time in Patent Office: 642 Days
• Field of Search: 343/770,771,895,705,708,797,846
• US Class Current: 343/705
• CPC Class Codes: H01Q 1/283 Blade, stub antennas
• CPC Class Codes: H01Q 21/26 Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
• CPC Class Codes: H01Q 9/43 Scimitar antennas

Abstract

A broadband VHF/UHF antenna exhibiting a hemispherical radiation pattern comprising four orthogonally positioned radiating elements and means for feeding the elements in phase quadrature. Each element includes a vertical blade portion and a capacitive loading section attached to the upper edge of the blade portion. The capacitive loading portions define at least approximately a spherical section.

Claims

1. A broadband VHF-UHF airborne antenna for satellite communication comprising four radiating elements, a support base, said radiating elements mounted orthogonally on said support base, each of said radiating elements including a vertical member having an upper edge portion and a capacitive loading portion defining at least approximately a spherical section, said capacitive loading portion being attached to said vertical member along said upper edge portion, said capacitive loading portions of said radiating elements cooperatively defining a larger, at least approximately spherical section, and feed means for electrically feeding said radiating element in phase quadrature.

2. An airborne antenna as defined in claim 1 wherein said feed means comprises a 90* hybrid and stripline means for feeding said radiating elements at 0* , 90* , 180*, and 270* .

3. An airborne antenna as defined in claim 1 wherein said upper edge portion is generally arcuate in configuration.

4. A radiating element for use in a combination turnstile and crossed-slot airborne satellite communication antenna comprising a vertical planar member having an upper edge portion, a generally triangularly shaped capacitive loading portion defining at least a section of a spherical surface, and means for attaching said capacitive loading portion to said vertical member along said upper edge portion.

5. A radiating element as defined in claim 4 and including feed means attached to said vertical member for energizing said element.

6. A radiating element as defined by claim 4 wherein said upper edge portion is generally arcuate in configuration.