The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1983
Filed:
Dec. 14, 1979
Frank S Aoyama, Redmond, WA (US);
Brian P Stapleton, Seattle, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
An omnidirectional VHF television antenna system for an aircraft which includes one pair of slot antennas on each side of the aircraft vertical fin. Each pair of antennas includes a VHF high band slot antenna and a VHF low band slot antenna. Due to co-channel interference the antenna system includes a left, right or omnidirectional azimuth response characteristic selectable by a cabin attendant through control of the antenna system antenna pattern select switch. The VHF low band slot antennas are tilted from the vertical by about 24.degree. and the VHF high band slot antennas are disposed vertically. Signal processing circuit means coupled between the slot antennas and the antenna system output terminal includes solid state switches to select antenna coverage omnidirectional and azimuth, or to the left or right of the aircraft to minimize ghosts or co-channel interference.