Communications: radio wave antennas – Antennas – With lumped reactance for loading antenna
Patent
1984-06-15
1986-12-16
Lieberman, Eli
Communications: radio wave antennas
Antennas
With lumped reactance for loading antenna
343818, 343840, 343859, 343821, H01Q 150, H01Q 916
Patent
active
046300619
ABSTRACT:
In general a coaxial feeder connected directly into the center of a half-wave dipole antenna disturbs electrical balance and therefore reduces the effectiveness of the screen of the feeder. In the present invention a dipole with two quarter-wavelength elements symmetrically connected through respective identical capacitors to the screen of the feeder is fed through an inductor connected to the junction between one element and its capacitor. By having equal reactances, the capacitors balance the dipole to earth and by means of its phase delay the inductor restores a resistive impedance termination for the feeder.
REFERENCES:
patent: 2235139 (1939-01-01), Bruce
patent: 2241582 (1941-05-01), Buschbeck et al.
patent: 3339205 (1967-08-01), Smitka
Lieberman Eli
National Research Development Corp.
Wimer Michael C.
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