# US 2013/0154902 A1 · Artificial electromagnetic material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154902 A1 - Document ID: US20130154902A1 - Status: Published application - Kind: A1 - Application number: 13/583,881 - Filed: 2011-10-27 - Published: 2013-06-20 - Earliest claimed: 2011-06-29 - Assignees: Kuang-Chi Innovative Technology Ltd.; Kuang-Chi Institute of Advanced Technology - Inventors: Ruopeng Liu; Lin Luan; Chaofeng Kou - Web page: https://patentgrep.com/patent/US20130154902A1 ## CPC - H01Q 15/02: Refracting or diffracting devices, e.g. lens, prism - H01Q 15/0026: {said selective devices having a stacked geometry or having multiple layers} - H01Q 15/0086: {said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An artificial electromagnetic material includes at least one material sheet. Each material sheet includes a substrate and a plurality of artificial microstructures attached to the substrate. Each substrate is virtually divided into multiple of substrate units arranged into an array. A pair of artificial microstructures is attached to each substrate. The pair of artificial microstructures includes a first artificial microstructure and a second artificial microstructure with different shapes. The dielectric constant of artificial electromagnetic materials gradually increases from zero in a certain frequency range, therefore the material has a low dielectric constant in the certain frequency range and can meet some needs of special situation. ## Claims ### Claim 1 An artificial electromagnetic material comprising: at least one material sheet, each material sheet comprising a substrate and a plurality of artificial microstructures attached to the substrate, each substrate being virtually divided into multiple of substrate units arranged in an array, a pair of artificial microstructures being attached to each substrate unit, the pair of artificial microstructures comprising a first artificial microstructure and a second artificial microstructure having different shapes. ### Claim 2 (depends on 1) The artificial electromagnetic material of claim 1, wherein the first artificial microstructure comprises an I-shape structure and two split ring structures, two terminals of each split ring structure toward each other to form an opening, and two openings of the two split ring structures face each other, the two split ring structure connected with an intermediate connecting line of the I-shape structure. ### Claim 3 (depends on 2) The artificial electromagnetic material of claim 2, wherein the split ring structure of the first artificial microstructure comprises a right angle or an arch bending part. ### Claim 4 (depends on 1) The artificial electromagnetic material of claim 1, wherein the second artificial microstructure comprises four branches with a same intersection point, one end of any one of the branches connected to the intersection point and the other end is defined as free end, the branch comprising at least one bending part, when each branch is rotated by 90 degrees, 180 degrees and 270 degrees in sequence about the intersection point as a rotation center, it will totally overlap the other three branches respectively. ### Claim 5 (depends on 4) The artificial electromagnetic material of claim 4, wherein the bending part of the first artificial microstructure is a right angle, a rounded angle or a sharp angle. ### Claim 6 (depends on 5) The artificial electromagnetic material of claim 5, wherein the free end of each branch in the second microstructure is connected with a wire segment. ### Claim 7 (depends on 6) The artificial electromagnetic material of claim 6, wherein the free end of any one of the second artificial microstructures is connected to a midpoint of the wire segment. ### Claim 8 (depends on 1) The artificial electromagnetic material of claim 1, wherein the second artificial microstructure includes two mutually orthogonal I-shaped structures, to each end of the two parallel sides of the I-shaped structure is connected a wire segment extending towards an inner side. ### Claim 9 (depends on 8) The artificial electromagnetic as shown in claim 8, wherein the wire segment is a straight line. ### Claim 10 (depends on 9) The artificial electromagnetic of claim 9, wherein the two wire segments respectively connected with adjacent end of the different I-shaped structures are parallel to each other. ### Claim 11 (depends on 8) The artificial electromagnetic material of claim 8, wherein the wire segment is an arc shape or a bending line. ### Claim 12 (depends on 1) The artificial electromagnetic material of claim 1, wherein the first artificial microstructure comprises four branches with a same intersection point, one end of any one of branches is connected with the intersection point and the other end is defined as a free end, each branch comprises at least one bending part, when each branch is rotated by 90 degrees, 180 degrees and 270 degrees in sequence about the intersection point as a rotation center, it will totally overlap the other three branches respectively, the second artificial microstructure includes two I-shaped structures which are orthogonal mutually, to each end of the two parallel sides of the I-shaped structure is connected a wire segment extending towards an inner side. ### Claim 13 (depends on 12) The artificial electromagnetic material of claim 12, wherein the bending part of the first artificial microstructure is a right angle, a rounded angle or a sharp angle. ### Claim 14 (depends on 12) The artificial electromagnetic material of claim 12, wherein the free end of any branches in the first artificial microstructure is connected with a wire segment. ### Claim 15 (depends on 14) The artificial electromagnetic material of claim 14, wherein the free end of any the first artificial microstructures is connected to a midpoint of the wire segment. ### Claim 16 (depends on 12) The artificial electromagnetic material of claim 12, wherein the wire segment in the second artificial microstructure is a straight line. ### Claim 17 (depends on 16) The artificial electromagnetic material of claim 16, wherein the two wire segments connected with two adjacent ends of different I-shaped structures are parallel to each other. ### Claim 18 (depends on 13) The artificial electromagnetic material of claim 13, wherein, wherein the wire segment in the second artificial microstructure is an arc shape or a bending line. ### Claim 19 (depends on 1) The artificial electromagnetic material of claim 1, wherein, wherein the artificial microstructure is made from metal wires. ### Claim 20 (depends on 19) The artificial electromagnetic material of claim 19, wherein the artificial microstructure is made from copper wire or silver wire.