Antennas, devices and systems based on metamaterial structures
View Patent ↗Techniques, apparatus and systems that use one or more composite left and right handed (CRLH) metamaterial structures in processing and handling electromagnetic wave signals. Antenna, antenna arrays and other RF devices can be formed based on CRLH metamaterial structures. The described CRLH metamaterial structures can be used in wireless communication RF front-end and antenna sub-systems.
1. A device, comprising:
a dielectric substrate having a first surface on a first side and a second surface on a second side opposing the first side;
a plurality of conductive patches formed on the first surface and separated from one another;
a ground conductive layer formed on the second surface; and a plurality of conductive via connectors formed in the substrate to connect the conductive patches to the ground conductive layer, respectively, to form a plurality of unit cells each comprising a volume having a respective conductive patch on the first surface, and a respective via connector connecting the respective conductive path to the ground conductive layer;
wherein the device is structured to form a composite left and right handed (CRLH) metamaterial structure from the unit cells;
wherein the ground conductive layer is patterned to have a dimension underneath a respective conductive patch to be less than a dimension of the respective conductive patch; and
wherein the ground conductive layer comprises a strip line that is connected to the conductive via connectors of at least a portion of the unit cells and passes through underneath the conductive patches of the portion of the unit cells, and wherein the strip line has a width less than a dimension of the conductive patch of each unit cell.
2. The device as in claim 1 , comprising:
a wireless access point or router coupled to the CRLH metamaterial structure through which a wireless signal is transmitted or received.
3. The device as in claim 1 , wherein:
each unit cell has a dimension not greater than one tenth of a wavelength of a signal in resonance with the CLRH metamaterial structure.
4. The device as in claim 3 , wherein:
each unit cell has a dimension not greater than one fortieth of a wavelength of a signal in resonance with the CRLH metamaterial structure.
5. The device as in claim 1 , further comprising:
an RF circuit coupled to the CRLH metamaterial structure and structured to be in a second CRLH metamaterial structure.
6. The device as in claim 1 , wherein:
the ground conductive layer comprises:
a common ground conductive area;
a plurality of strip lines that are connected to the common ground conductive area at first distal ends of the strip lines and having second distal ends of the strip lines connected to conductive via connectors of at least a portion of the unit cells underneath the conductive patches of the portion of the unit cells; and
wherein the strip line has a width less than a dimension of the conductive patch of each unit cell.