Directional slot antenna with a dielectric insert

摘要

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.

主权项

1. 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.