Antenna coupling system

Details Antenna coupling system Antenna coupling system

1995-09-11

1998-05-12

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With lumped reactance for loading antenna

343745, 343861, 343752, H01Q 900

Patent

active

057512531

ABSTRACT:
A new and improved antenna-transmission line coupling system is provided wherein the electro-magnetic oscillations in the antenna are prevented from entering the circuitry which couples the antenna to its transmission line. The coupling structure (called coupler) includes an impedance matching transformer and a capacitor connected to the transformer and capacitively coupled with the antenna element. Various embodiments are provided for varying the capacitive coupling with the antenna element. Antenna elements having capacitor plates on their ends are disclosed; as well as an arrangement wherein a universal coupler having a broad band impedance matching transformer can be used with any number of antenna elements each tailored for a different commercial RF frequency band.

REFERENCES:
patent: 3315264 (1967-04-01), Brueckmann
patent: 4028704 (1977-06-01), Blass
patent: 4080604 (1978-03-01), Wosniewski
patent: 4764773 (1988-08-01), Larsen et al.
patent: 4935746 (1990-06-01), Wells

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