# US 11,909,119 B2 · Circular polarization array antenna device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,119 B2 - Document ID: US11909119B2 - Status: Granted - Kind: B2 - Application number: 17/712,190 - Filed: 2022-04-04 - Published: 2022-07-21 - Granted: 2024-02-20 - Earliest claimed: 2019-10-21 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Yoshiki Yamada; Kengo Onaka - Web page: https://patentgrep.com/patent/US11909119B2 ## CPC - H01Q 21/061: {Two dimensional planar arrays} - H01Q 21/065: {Patch antenna array} - H01P 5/22: Hybrid ring junctions - H01Q 9/0435: {using two feed points} - H01Q 15/24: Polarising devices; Polarisation filters (H01Q15/12, H01Q15/22 take precedence) - H01Q 15/242: {Polarisation converters} - 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 21/245: {provided with means for varying the polarisation (polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) ## Abstract An antenna device is formed by arranging radiation elements each radiating a circularly polarized wave in a matrix of three rows and four columns. The radiation elements include three sets of radiation elements of four types having a positional relationship rotationally symmetric with each other. The radiation elements are arranged such that adjacent elements are of different types. ## Claims ### Claim 1 A circular polarization array antenna device, comprising: an element group that includes a plurality of elements each configured to radiate a circularly polarized wave and arranged in a matrix of N rows and M columns, in which N is an odd number of three or more and M is four or more being a multiple of four, wherein the plurality of elements include the same number of elements of four types having a positional relationship rotationally symmetric with each other, and the plurality of elements are arranged such that adjacent elements are of types different from each other. ### Claim 2 (depends on 1) The circular polarization array antenna device of claim 1, wherein the plurality of elements are arranged in a matrix of three rows and four columns. ### Claim 3 (depends on 2) The circular polarization array antenna device of claim 2, wherein the number of each of the elements of four types is three. ### Claim 4 (depends on 3) The circular polarization array antenna device of claim 3, wherein when any integer from 1 to 3 is denoted by n, any integer from 1 to 4 is denoted by m, and a position of an n-th row and an m-th column in a matrix is denoted by (n×m), the elements of four types include a first type element disposed at (1×1), (2×3), and (3×1), a second type element disposed at (1×2), (2×4), and (3×2), a third type element disposed at (1×3), (2×1), and (3×3), and a fourth type element disposed at (1×4), (2×2), and (3×4). ### Claim 5 (depends on 2) The circular polarization array antenna device of claim 2, wherein the second type element is obtained by rotating the first type element by 90 degrees in a predetermined rotation direction and translating the rotated first type element. ### Claim 6 (depends on 5) The circular polarization array antenna device of claim 5, wherein the third type element is obtained by rotating the first type element by 270 degrees in the predetermined rotation direction and translating the rotated first type element. ### Claim 7 (depends on 6) The circular polarization array antenna device of claim 6, wherein the fourth type element is obtained by rotating the first type element by 180 degrees in the predetermined rotation direction and translating the rotated first type element. ### Claim 8 (depends on 1) The circular polarization array antenna device of claim 1, wherein each of the plurality of elements has two feed point. ### Claim 9 (depends on 8) The circular polarization array antenna device of claim 8, wherein the circular polarization array antenna device further comprises a plurality of hybrid circuits each coupled to corresponding one of the plurality of elements. ### Claim 10 (depends on 9) The circular polarization array antenna device of claim 9, wherein each of the plurality of hybrid circuits includes a first terminal coupled to one of the two feed points of a corresponding one of the plurality of elements. ### Claim 11 (depends on 10) The circular polarization array antenna device of claim 10, wherein each of the plurality of hybrid circuits includes a second terminal coupled to another of the two feed points of the corresponding one of the plurality of elements. ### Claim 12 (depends on 11) The circular polarization array antenna device of claim 11, wherein each of the plurality of hybrid circuits includes a third terminal to which a radio frequency signal is inputted from outside. ### Claim 13 (depends on 12) The circular polarization array antenna device of claim 12, wherein each of the plurality of hybrid circuits includes first to fourth transmission lines each having an electrical length equal to one fourth of a wavelength of the radio frequency signal. ### Claim 14 (depends on 13) The circular polarization array antenna device of claim 13, wherein one end of the first transmission line is coupled to one end of the second transmission line, another end of the second transmission line is coupled to one end of the third transmission line, another end of the third transmission line is coupled to one end of the fourth transmission line, and another end of the fourth transmission line is coupled to another end of the first transmission line. ### Claim 15 (depends on 14) The circular polarization array antenna device of claim 14, wherein the first terminal is coupled between the first transmission line and the second transmission line, the second terminal is coupled between the second transmission line and the third transmission line, and the third terminal is coupled between the first transmission line and the fourth transmission line. ### Claim 16 (depends on 15) The circular polarization array antenna device of claim 15, wherein the first transmission line and the third transmission line have a curved shape. ### Claim 17 A circular polarization array antenna device, comprising: an element group that includes a plurality of elements each configured to radiate a circularly polarized wave and arranged in a matrix of three rows and K columns, in which K is an even number of four or more, wherein the plurality of elements include elements of four types having a positional relationship rotationally symmetric with each other, and the elements of four types include a first type element, a second type element obtained by rotating the first type element by 90 degrees in a predetermined direction, a third type element obtained by rotating the first type element by 270 degrees in the predetermined direction, and a fourth type element obtained by rotating the first type element by 180 degrees in the predetermined direction. ### Claim 18 (depends on 17) The circular polarization array antenna device of claim 17, wherein the plurality of elements are included in a plurality of first element groups each of which includes four elements arranged in two rows and two columns and which are disposed in a zigzag manner in a column direction, and a plurality of second element groups each of which includes two elements arranged in one row and two columns and each of which is disposed adjacent to a corresponding one of the plurality of first element groups in a row direction, and the four elements included in the first element group include each one of the elements of four types, and the two elements included in the second element group include elements of two of the four types. ### Claim 19 (depends on 18) The circular polarization array antenna device of claim 18, wherein each of the two elements in each of the second element groups is an element of a type obtained by rotating at least one of elements in the first element group, both of which are adjacent to the two elements, by 90 degrees. ### Claim 20 A circular polarization array antenna device, comprising: a plurality of antenna elements each configured to radiate a circularly polarized wave, wherein the plurality of antenna elements are arranged in a matrix of N rows and M columns, in which N is an odd number of three or more and M is four or more being a multiple of four, the plurality of antenna elements include four types of antenna elements, each of the four types of antenna elements having a 90 degree symmetrically rotational relationship with respect to another of the types of antenna elements, and the plurality of elements are arranged such that adjacent elements are of different types.