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US 7,289,080 B1Granted
Ultra broadband linear antenna
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorWalter A Bohlman
Life of this patent
Estimating the term…
Abstract
An antenna of dipole and monopole antenna elements with filtering to achieve a greater bandwidth. The multiple antenna elements are isolated or combined in order to provide a self adjusting electrical length by using multi-terminal filtering.
Claims20
A wideband antenna, comprising:
- a central coaxial feed having a first end coupled to a reference plane and a second end coupled to a first diplexing filter, a first coaxial section having a first end of said first coaxial section coupled to said first diplexing filter and an opposing end of said first coaxial section coupled to a second diplexer filter, wherein a first end of a second coaxial section is coupled to said second diplexer filter and an opposing end of said second coaxial section coupled to a transformer, and wherein said transformer is coupled to said reference plane;
- a first dipole antenna coupled to said first diplexing filter;
- a second dipole antenna coupled to said second diplexing filter;
- and
- a monopole antenna coupled to said transformer.
2 more elements
An antenna system for wideband operations having a monopole antenna and at least one self-adjusting dipole antenna, comprising:
- a plurality of tubular sections forming said at least one dipole antenna, and said monopole antenna, said dipole antenna having dipole sections linearly disposed between a first monopole element and a second monopole element, wherein said dipole sections and said first and second monopole element are electrically coupled;
- a central coaxial feed linearly disposed proximate said tubular sections and coupled on a first end to an input signal about a reference plane;
- at least one coaxial section linearly disposed proximate said tubular sections and coupling between said reference plane and a second end of said central coaxial feed;
- and
- at least one four terminal diplex unit coupled between each said dipole antenna.
2 more elements
A method for providing broadband coverage from a combination of at least two dipole antenna and a monopole antenna, comprising:
- feeding an input signal to a first dipole antenna from a first coaxial cable via a diplexer for a first frequency range;
- automatically switching from said first dipole antenna to a second coaxial cable for a second frequency range, wherein said second frequency range is lower than said first frequency range;
- feeding a second dipole antenna coupled to said second coaxial cable with said second frequency range;
- automatically switching from said second dipole antenna to a third coaxial cable for a third frequency range, wherein said third frequency range is lower than second frequency range;
- and
- feeding said monopole antenna with said third frequency range.
3 more elements
Dependencies are inferred from the claim text.