Double-tuned disc loaded monopole

Details Double-tuned disc loaded monopole Double-tuned disc loaded monopole

1985-06-05

1987-01-06

Lieberman, Eli

Communications: radio wave antennas

Antennas

With lumped reactance for loading antenna

343830, H01Q 938

Patent

active

046350683

ABSTRACT:
A monopole antenna is mounted on a ground plane and incorporates a radiating structure such as a disc or hollow cap parallel to the ground plane, for loading the antenna. An elevated feed is formed by a biconical central post between the radiating structure and the ground plane. Tuning is also accomplished by a partial or total circumferential dielectric (which may also function as a support) having an outer electrically conducting sheet spaced apart from the central post to provide shunt capacitance, and by outboard inductive posts which connect between the ground plane and the radiating structure to provide shunt inductance. Alternatively, additional tuning may be accomplished by a circuit between the upper and lower portions of the central post.

REFERENCES:
patent: 2368663 (1945-02-01), Kandoian
patent: 3656166 (1972-04-01), Klopach
patent: 3852760 (1974-12-01), Reggia

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