Communications: radio wave antennas – Antennas – Slot type
Patent
1984-08-31
1986-05-20
Lieberman, Eli
Communications: radio wave antennas
Antennas
Slot type
343725, H01Q 1310
Patent
active
045904804
ABSTRACT:
A television broadcast antenna includes a high-gain pylon consisting of a vertical array of slots in a conductive cylinder for radiating with high gain towards distant locations. An auxiliary low-gain vertically-polarized portion of the antenna has its phase center coincident with or near the phase center of the pylon for radiating a vertically polarized signal component. This position of the auxiliary portion reduces wind load and feed-line length by comparison with a location above the pylon. In a particularly advantageous embodiment of the invention, the horizontally-polarized radiation pattern of the pylon in the region within a few degrees below the main beam, which is the region directed towards local television viewers, has a low but relatively constant amplitude and phase. The auxiliary portion of the antenna produces a vertically-polarized radiation component in this region which has about the same amplitude as the horizontal component and which is approximately in phase quadrature with the horizontally-polarized component, and which therefore provides local (often urban) viewers with circular polarization for reducing ghosting. Distant viewers receive the benefits of high gain and high radiated power in the horizontally-polarized component.
REFERENCES:
patent: 2946055 (1960-07-01), Faflick
patent: 2972147 (1961-02-01), Wilkinson
patent: 2981947 (1961-04-01), Bazan
patent: 3340534 (1967-09-01), Fee
patent: 4021815 (1972-05-01), Bogner
patent: 4129871 (1978-12-01), Johns
patent: 4297706 (1981-10-01), Nikolayuk
Antennas by Kraus, published by McGraw-Hill Book Co., 1950, pp. 356-361.
Antenna Engineering Handbook edited by Jasik, published by McGraw-Hill, 1970, p. 8-2.
Nikolayuk Nicholas
Sikina, Jr. Thomas V.
Lieberman Eli
Meise William H.
RCA Corporation
Tripoli Joseph S.
Troike Robert L.
LandOfFree
Broadcast antenna which radiates horizontal polarization towards does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Broadcast antenna which radiates horizontal polarization towards, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broadcast antenna which radiates horizontal polarization towards will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2111433