Filtering dielectric resonator antennas including a loop feed structure for implementing radiation cancellation
AssigneeCity University of Hong Kong
InventorsKwok Wa Leung, Yan Ting Liu, Jian Ren
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Abstract
Systems and methods which provide filtering dielectric resonator antenna (FDRA) configurations implementing radiation cancellation are disclosed. Embodiments of a FDRA provide implementations of dielectric resonator antennas (DRAs) which are configured with a loop feed structure facilitates radiation cancellation to provide radiation nulls at frequencies outside of a desired passband to thereby implement radiation cancellation for filtering functionality of the FDRA. FDRAs of embodiments may be variously polarized, such as to provide linear polarization or circular polarization.
Claims30
A filtering dielectric resonator antenna comprising:
- a dielectric resonator configured to produce a first horizontal magnetic dipole;
- and
- a loop feed structure configured to produce a second horizontal magnetic dipole, wherein the first horizontal magnetic dipole and the second horizontal magnetic dipole are opposite-phase equivalent magnetic dipoles providing filtering functionality of the filtering dielectric resonator antenna through radiation cancellation.
A method for providing filtering antenna operation, the method comprising:
- generating a first horizontal magnetic dipole from excitation of a dielectric resonator of a filtering dielectric resonator antenna;
- generating a second horizontal magnetic dipole from excitation of a loop feed structure of the filtering dielectric resonator antenna, wherein the first horizontal magnetic dipole and the second horizontal magnetic dipole are opposite-phase equivalent magnetic dipoles;
- and
- providing filtering of one or more frequencies outside of a passband of the filtering dielectric resonator antenna through radiation cancellation resulting from combining of the first horizontal magnetic dipole and the second horizontal magnetic dipole.
A filtering antenna system, the system comprising:
- a ground plane disposed upon a first side of a substrate, the ground plane including a slot disposed therein;
- a signal feed path disposed upon a second side of the substrate and forming a microstrip feed line, the microstrip feed line being disposed in juxtaposition with the slot of the ground plane;
- a dielectric resonator disposed upon the ground plane, wherein the dielectric resonator is in communication with the microstrip feed line through the slot of the ground plane to thereby provide a slot-fed dielectric resonator antenna structure, and wherein the slot-fed dielectric resonator antenna structure is configured to produce a first horizontal magnetic dipole;
- and
- a loop feed structure, wherein at least a portion of the loop feed structure penetrates the dielectric resonator, wherein a first end of the loop feed structure is in communication with the microstrip feed line through the slot of the ground plane and a second end of the loop feed structure is in communication with the ground plane, and wherein the loop feed structure is configured to produce a second horizontal magnetic dipole, wherein the first horizontal magnetic dipole and the second horizontal magnetic dipole have a same magnitude and opposite phase at one or more frequencies outside a filtering antenna passband and filter one or more frequencies outside of the filtering antenna passband through radiation cancellation.
Dependencies are inferred from the claim text.