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:
Apr. 15, 1980
Filed:
Feb. 14, 1977
John J Gibson, Princeton, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
An antenna system particularly suitable for permitting low cost reception of broadcasted circularly polarized television low and high VHF signals is provided by arranging all of the broadcast antennas so that the low and high VHF television frequency signal waves are radiated in opposite directional senses of circular or elliptical polarization. The low cost receiving antenna for receiving both of these bands comprises a pair of linear elements with the first of the pair of elements adapted to receive linearly polarized waves in a first linear polarization and a second of the elements adapted to receive linearly polarized waves in a second orthogonal polarization. A combining means includinga delay is provided for combining the signal waves received at one of the pair of elements with delayed signal waves received at the other of the receiving elements where the delay is on the order of one-quarter wavelength at a frequency within the low VHF frequency band.