Directional slot antenna with a dielectric insert
AssigneeNovAtel Inc.
InventorAhmad Chamseddine
Life of this patent
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Abstract
A directional slot antenna comprises a radiating component coupled to a reflector. A reflector spacing gap or cavity between the radiating component and the reflector has a height which is less than a predetermined height of a free-space reflector spacing cavity associated with desired gains for frequencies of interest. A dielectric material insert is positioned within the reflector spacing cavity and fills or partially fills the cavity. The reduced-height cavity including the dielectric material insert provides an increased electrical separation between the radiating component and the reflector that corresponds to the predetermined height of the free-space reflector spacing cavity.
Claims23
A directional slot antenna, comprising:
- a radiating component that operates as a slot antenna and radiates electromagnetic energy in both directions along an antenna axis;
- a reflector electrically separated from the radiating component, the reflector providing directionality by reflecting the radiated electromagnetic energy emitted in the direction of the reflector;
- a reflector spacing cavity between the radiating component and the reflector, the reflector spacing cavity having a height which is less than a predetermined height of a free-space reflector spacing cavity associated with desired gains for frequencies of interest;
- a dielectric material insert positioned within the reflector spacing cavity;
- and
- the reflector spacing cavity including the dielectric material insert providing an electrical separation between the radiating component and the reflector that corresponds to the predetermined height of the free-space reflector spacing cavity.
A directional pin wheel antenna, comprising:
- a radiating component including a spiral transmission line, the radiating component operating as a slot antenna and radiating electromagnetic energy in both directions along an antenna axis;
- a reflector electrically separated from the radiating component, the reflector providing directionality by reflecting the radiated electromagnetic energy emitted in the direction of the reflector;
- a reflector spacing cavity between the radiating component and the reflector, the reflector spacing cavity having a height which is less than a predetermined height of a free-space reflector spacing cavity associated with desired gains for frequencies of interest;
- a dielectric material insert positioned within the reflector spacing cavity;
- the reflector spacing cavity including the dielectric material providing an electrical separation between the radiating component and the reflector that corresponds to the predetermined height of the free-space reflector spacing cavity.
Dependencies are inferred from the claim text.