# US 7,612,730 B2 · Antenna system and antenna thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,730 B2 - Document ID: US7612730B2 - Status: Granted - Kind: B2 - Application number: 12/057,848 - Filed: 2008-03-28 - Published: 2009-08-06 - Granted: 2009-11-03 - Earliest claimed: 2008-01-31 - Assignees: YFY RFID Technologies Company Limited - Inventors: Chan-Ping Lim; Tsung-Ying Tsai - Web page: https://patentgrep.com/patent/US7612730B2 ## CPC - H01Q 13/10: Resonant slot antennas - H01Q 21/24: Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna system and an antenna thereof are provided. The antenna system comprises an antenna array including a plurality of antennas and at least one plate. The at least one plate is used for isolating two neighbor ones of the antennas. Each of the antennas comprises a first surface and a second surface. The first surface has a metal area and a slot area. The metal area is coated by a metal material, while the slot area consists of three slots. Each of the slots comprises a first area and a second area. The first areas are connected to each other, and each of the second areas extends to different directions individually. The second surface is coated by a metal line as a signal feed end. The metal line terminates at an opposite position of a signal feed slot, which is one of the three slots. ## Claims ### Claim 1 An antenna, comprising: a first surface comprising a metal area and a slot area, wherein the metal area is coated by a metal material, the slot area consists of three slots, each slot defines a first area and a second area, the first areas of the three slots are connected to each other, and the second areas of the three slots extend to different directions individually; and a second surface opposite to the first surface, wherein the second surface is coated by a metal line as a signal feed end, the metal line terminates at an opposite position of a signal feed slot, and the signal feed slot is one of the three slots. ### Claim 2 (depends on 1) The antenna of claim 1, wherein each of the first areas is a rectangle. ### Claim 3 (depends on 2) The antenna of claim 2, wherein a length of the rectangle is substantially between 20 and 21 millimeter (mm), and a width of the same is substantially between 7 and 8 mm. ### Claim 4 (depends on 1) The antenna of claim 1, wherein each of the second areas is a circle. ### Claim 5 (depends on 4) The antenna of claim 4, wherein a radius of the circle is substantially between 8 and 10 mm. ### Claim 6 (depends on 1) The antenna of claim 1, wherein the metal line terminates at an opposite position of an intersection of the first and second areas of the signal feed slot. ### Claim 7 (depends on 6) The antenna of claim 6, wherein a width of the metal line at the opposite position is substantially between 2.5 and 3.5 mm, and a terminal of the metal line protrudes beyond the opposite position by 5.5 to 9 mm. ### Claim 8 (depends on 1) The antenna of claim 1, wherein the three slots form a Y-shaped geometric profile. ### Claim 9 (depends on 8) The antenna of claim 8, wherein every two adjacent ones of the slots have an included angle of 120 degrees. ### Claim 10 (depends on 1) The antenna of claim 1, wherein the three slots form a T-shaped geometric profile. ### Claim 11 An antenna system, comprising: an antenna array comprising a plurality of antennas, each antenna comprising: a first surface comprising a metal area and a slot area, wherein the metal area is coated by a metal material, the slot area consists of three slots, each slot defines a first area and a second area, the first areas of the three slots are connected to each other, and the second areas of the three slots extend to different directions individually; and a second surface opposite to the first surface, wherein the second surface is coated by a metal line as a signal feed end, the metal line terminates at an opposite position of a signal feed slot, and the signal feed slot is one of the three slots; and at least one plate for isolating two neighbor ones of the antennas. ### Claim 12 (depends on 11) The antenna system of claim 11, further comprising a case for accommodating the antenna array and the plate, wherein the antenna system defines a signal shield direction and a signal passing direction, a part of the case in the signal shield direction is made of metal material and a part of the case in the signal passing direction is made of non-metal material. ### Claim 13 (depends on 11) The antenna system of claim 11, wherein each of the first areas is a rectangle. ### Claim 14 (depends on 13) The antenna system of claim 13, wherein a length of the rectangle is substantially between 20 and 21 mm, and a width of the same is substantially between 7 and 8 mm. ### Claim 15 (depends on 11) The antenna system of claim 11, wherein each of the second areas is a circle. ### Claim 16 (depends on 15) The antenna system of claim 15, wherein a radius of the circle is substantially between 8 and 10 mm. ### Claim 17 (depends on 11) The antenna system of claim 11, wherein the metal line terminates at an opposite position of an intersection of the first and second areas of the signal feed slot, a width of the metal line at the opposite position is substantially between 2.5 and 3.5 mm, and a terminal of the metal line protrudes beyond the opposite position by 5.5 to 9 mm. ### Claim 18 (depends on 11) The antenna system of claim 11, wherein the three slots form a Y-shaped geometric profile. ### Claim 19 (depends on 18) The antenna system of claim 18, wherein every two adjacent ones of the slots have an included angle of 120 degrees. ### Claim 20 (depends on 11) The antenna system of claim 11, wherein the three slots form a T-shaped geometric profile.