Communications: radio wave antennas – Antennas – With grounding structure
Patent
1983-10-13
1987-04-14
Lieberman, Eli
Communications: radio wave antennas
Antennas
With grounding structure
343846, 343829, H01Q 148
Patent
active
046582665
ABSTRACT:
The present invention relates to vertical antenna systems employing an improved artificial ground system. In a low frequency design, the artificial ground system provided is in the form of a counterpoise or ground screen that is provided with an efficient, economical and practical electrical radial wire design. A high frequency design is also provided in the form of an integral antenna structure. This high frequency integral design entails a vertical antenna, a counterpoise in the form of a metal plate, a ground plate, and wherein said metal plate forming the counterpoise is insulated from the ground plate. In either type of antenna system, the counterpoise functions to collect antenna return currents and direct them back to the feed point of the antenna in an efficient and effective manner.
REFERENCES:
patent: 2008931 (1935-07-01), Schuler
patent: 4184160 (1980-01-01), Affronti
Roberts, "Input Impedance of a Folded Dipole", RCA Review, Jun. 1947, pp. 289-300.
ARRL Antenna Book, published by the ARRL, Newington, Conn., 14th Edition, 1983, pp. 8-15 to 8-16.
NRI Communications Text, CC210, National Radio Institute, Wash., D.C., 1976, pp. CC210-20 to CC210-21.
Miller, "Modern Electronic Communication", Prentice-Hall, Englewood Cliffs, N.J., 1978, pp. 412-413.
Lieberman Eli
Wimer Michael C.
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