Antenna for personal mobile communications or locating equipment
AssigneeCenturion Intl., Inc.
InventorsJames Blake Winter, Jon L. Sullivan
Life of this patent
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Abstract
A quadrifilar helix antenna of the present invention is used with a wireless device to transmit and receive signals. The antenna includes a plurality of helical antenna elements and an impedance transformer electrically connected to the antenna elements and connectable to the wireless device. The impedance transformer may be comprised of either a planar transmission line 1/4 wave impedance transformer or a pi-network impedance transformer. The antenna may also be comprised of dual band quadrifilar helix antenna for transmitting or receiving two different frequency bands.
Claims6
A dual band quadrifilar helix antenna for a wireless device comprising:
- a first quadrifilar having a plurality of helical antenna elements for receiving or transmitting signals in a first frequency band;
- a second quadrifilar having a plurality of helical antenna elements for receiving or transmitting signals in a second frequency band;
- a first impedance transformer electrically connected to the plurality of antenna elements of the first quadrifilar;
- a second impedance transformer electrically connected to the plurality of antenna elements of the second quadrifilar;
- and
- wherein the first and second impedance transformers are electrically connected together forming a connection point for the wireless device.
Dependencies are inferred from the claim text.