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US 12,341,243 B1Granted
Helix antenna feed structure with coaxial impedance control
AssigneeAttotude, Inc.
InventorsPhillip Kness, John F Sevic, Joy Laskar, Romain Pelard
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Abstract
A microwave helix antenna with a coaxial interface having controlled transmission properties is disclosed. In one aspect, dielectric beads surround a center conductor and are varied in number, thickness and spacing to achieve desired transmission properties.
Claims12
An antenna structure, comprising:
- a helix radiating element;
- and
- an impedance controlled coaxial interface having a first end and a second end opposite the first end, the first end coupled to the helix radiating element, the second end configured to receive a coaxial cable connector, the impedance controlled coaxial interface comprising an inner conductor, an outer conductor, and a medium separating the inner conductor from the outer conductor, the medium having a first section and a second section, the first section proximal to the first end and having a first cross-sectional area, the second section proximal to the second end and having a second cross-sectional area, the first cross-sectional area smaller than the second cross-sectional area;
- wherein the first cross-sectional area and the second cross-sectional area are selected to achieve a desired controlled impedance so as to improve performance measured by at least one of directivity, gain, side-lobe suppression efficiency, and axial ratio.
1 more element
Dependencies are inferred from the claim text.