Polarization standing wave cavity assisted by anisotropic structures
View Patent ↗Waveguides in accordance with embodiments of the invention are disclosed. In one embodiment, a dual-mode circular waveguide includes a cavity, a first end wall including a first handedness-preserving metasurface positioned at a first end of the cavity, and a second end wall including a second handedness-preserving metasurface positioned at a second end of the cavity.
1. A dual-mode circular waveguide comprising:
a cavity;
a first end wall comprising a first handedness-preserving metasurface positioned at a first end of the cavity; and
a second end wall comprising a second handedness-preserving metasurface positioned at a second end of the cavity;
wherein the first and second handedness-preserving metasurfaces utilize a corrugated metal structure.
2. The dual-mode circular waveguide of claim 1 , wherein the first and second handedness-preserving metasurfaces are anisotropic metasurfaces.
3. The dual-mode circular waveguide of claim 1 , wherein the first handedness-preserving metasurface and second handedness-preserving metasurface have triangular profile channels of the corrugated metal structure.
4. The dual-mode circular waveguide of claim 1 , wherein the first handedness-preserving metasurface and second handedness-preserving metasurface are configured to construct a polarization standing wave of a particular frequency inside the cavity by determining a cavity length and rotation angle between the first end wall and second end wall.
5. The dual-mode circular waveguide of claim 1 , wherein the first handedness-preserving metasurface and second handedness-preserving metasurface provide a perfect electric conductor (PEC) type reflection for a first field polarization, while providing a perfect magnetic conductor (PMC) behavior for a second field polarization orthogonal to the first field polarization.
6. The dual-mode circular waveguide of claim 1 , wherein the first handedness-preserving metasurface and second handedness-preserving metasurface have square profile channels of the corrugated metal structure.