Radio antenna construction

Details Radio antenna construction Radio antenna construction

1977-11-07

1979-09-04

Smith, Alfred E.

Communications: radio wave antennas

Antennas

With lumped reactance for loading antenna

343752, 343722, 336197, H01Q 900, H01Q 100, H01F 2730

Patent

active

041670116

ABSTRACT:
An impedance matching transformer and isolation inductance construction for a vertical-end fed radio antenna which enables simple manufacturing tecniques to obtain uniformity of impedance matching from one antenna to the next and which enables the use of a sintered magnetically permeable core of a length longer than three inches. The impedance matching transformer includes a two turn primary and insulating means accurately spacing these two turns. The core is made up of a plurality of relatively cylindrical formed short core elements from sintered magnetically permeable material in end to end relationship. Very thin plastic spacers are interposed between the adjacent ends of the core elements and between the sides of the elements and the housing to prevent chipping.

REFERENCES:
patent: 1959543 (1934-05-01), Osnos
patent: 2311472 (1943-02-01), Roosenstein
patent: 2748386 (1956-05-01), Polydoroff
patent: 2771386 (1956-11-01), Merz et al.
patent: 3495209 (1970-02-01), Engle
patent: 3689928 (1972-09-01), Felsenheld
patent: 3760315 (1973-09-01), Hartmann

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