Communications: radio wave antennas – Antennas – With lumped reactance for loading antenna
Patent
1978-02-01
1979-10-02
Lieberman, Eli
Communications: radio wave antennas
Antennas
With lumped reactance for loading antenna
343861, H01Q 900
Patent
active
041700147
ABSTRACT:
An antenna coil for use in radio frequency communications having a molded assembly of four components. The antenna coil includes a conductive top coil form insert, a conductive coil form center contact having a tap point, and a conductive bottom coil form insert disposed on a coil form inner core or placed on a removable core pin around which plastic is molded to form the antenna coil form. A plurality of grooves molded into the antenna coil form are provided to accommodate a coil wire. A whip antenna radiating element screws into a threaded inner portion of the top coil form insert and the bottom coil form insert is threaded to screw onto a base or mobile antenna mount which connects to communications equipment through a coaxial cable. The coil form center contacts has a number of alternating lugs and slots to allow a large number of coil variations. The coil form center contact accepts an insulated center pin of the base or mobile antenna mount which electrically connects to the tap point, also the feed point of the completed antenna coil. The antenna coil consists of a top series coil to compensate for a shortened length of the whip antenna radiating element and a bottom shunt coil to provide proper matching between the feed point of the antenna coil.
REFERENCES:
patent: 3166751 (1965-01-01), Roll
patent: 3267476 (1966-08-01), Finke
patent: 3461455 (1969-08-01), Rowe
patent: 3513472 (1970-05-01), Altmayer
patent: 4080604 (1978-03-01), Wosniewski
Antenna and Vehicular Accessories, Inc.
Lieberman Eli
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