# US 2019/0123456 A1 · Multiple-input multiple-output (mimo) omnidirectional antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0123456 A1 - Document ID: US20190123456A1 - Status: Published application - Kind: A1 - Application number: 16/229,352 - Filed: 2018-12-21 - Published: 2019-04-25 - Earliest claimed: 2016-02-18 - Assignees: Alpha Wireless Limited - Applicants: Alpha Wireless Limited - Inventors: Cao Ming; Fergal Lawlor - Web page: https://patentgrep.com/patent/US20190123456A1 ## CPC - H01Q 21/26: Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre - H01Q 1/246: {specially adapted for base stations} - H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome - H01Q 21/00: Antenna arrays or systems (arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00) - H01Q 21/205: {providing an omnidirectional coverage (turnstile aerials H01Q21/26)} - 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 The present invention is directed towards a Multiple-Input Multiple-Output (MIMO) omnidirectional antenna. The Multiple-Input Multiple-Output (MIMO) omnidirectional antenna comprising three or more column sets, where the three or more column sets are arranged in a centrosymmetric arrangement about a centre point of the antenna. Each column set comprises two or more antenna columns and each of the antenna columns mounts a plurality of radiators thereon. Each antenna column receives no more than two signals to be transmitted, and, each of the antenna columns is arranged to be axisymmetric about a radially-directed axis created between the centre point of the antenna and a transverse cross-sectional midpoint on the antenna column. Therefore, each radiation pattern established by each of the three or more column sets is centrosymmetric about the centre point of the antenna, and, is axisymmetric about the radially-directed axis. ## Claims ### Claim 1 A 4×4 Multiple-Input Multiple-Output omnidirectional antenna comprising a plurality of radiators mounted on six antenna columns, with each of the six antenna columns mounting a plurality of radiators; each of the six antenna columns being substantially rectangular in shape such as to comprise side edges, a top edge and a bottom edge whereby the side edges are longer than the top and bottom edges; each of the six antenna columns being positioned adjacent to two of the remaining antenna columns along its side edges, such that the six antenna columns are arranged to have a substantially hexagonal transverse cross-section; wherein, the 4×4 Multiple-Input Multiple-Output omnidirectional antenna comprises four antenna ports for receiving four signals to be transmitted; two of the four ports being connected to three of the six antenna columns and the other two ports being connected to the other three antenna columns; whereby, the antenna columns are configured such that an antenna column connected to two of the antenna ports is situated intermediate two adjacent antenna columns connected to the other two ports. ### Claim 2 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, each of the six antenna columns comprises four radiators. ### Claim 3 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, the radiators are mounted substantially vertically in a linear fashion along the length of the rectangular-shaped antenna columns. ### Claim 4 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, the radiators are dual polarised antenna elements. ### Claim 5 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, none of the plurality of radiators are phase shifted. ### Claim 6 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, the antenna operates as a dual band 2×2 Multiple-Input Multiple-Output omnidirectional antenna. ### Claim 7 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, the 4×4 Multiple-Input Multiple-Output omnidirectional antenna is housed within a tubular shaped radome. ### Claim 8 (depends on 1) A 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1, wherein, the 4×4 Multiple-Input Multiple-Output omnidirectional antenna operates in one or more of: the 4900 MHz to 6100 MHz frequency range, the 3300 MHz to 3800 MHz frequency range, the 2300 MHz to 3800 MHz frequency range, the 1710 MHz to 2690 MHz frequency range, and, the 689 MHz to 960 MHz frequency range. ### Claim 9 (depends on 1) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna comprising a 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 1 stacked on top of a second 4×4 Multiple-Input Multiple-Output omnidirectional antenna as claimed in any of the preceding claims. ### Claim 10 An 8×8 Multiple-Input Multiple-Output omnidirectional antenna comprising a plurality of radiators mounted on twelve antenna columns, with each of the twelve antenna columns mounting a plurality of radiators; each of the twelve antenna columns being substantially rectangular in shape such as to comprise side edges, a top edge and a bottom edge whereby the side edges are longer than the top and bottom edges; each of the twelve antenna columns being positioned adjacent to two of the remaining antenna columns along its side edges, such that the twelve antenna columns are arranged to have a substantially dodecagonal transverse cross-section; wherein, the 8×8 Multiple-Input Multiple-Output omnidirectional antenna comprises eight antenna ports for receiving eight signals to be transmitted; a first pair of the eight ports being connected to a first set of three of the twelve antenna columns; a second pair of the eight ports being connected to a second set of three of the twelve antenna columns; a third pair of the eight ports being connected to a third set of three of the twelve antenna columns; and a fourth pair of the eight ports being connected to a fourth set of three of the twelve antenna columns; whereby, the antenna columns are configured such that one of the antenna columns in the first set of three antenna columns is situated adjacent one of the antenna columns in the second set of three antenna columns; with said antenna column in the second set of three antenna columns being situated adjacent one of the antenna columns in the third set of three antenna columns; and said antenna column in the third set of three antenna columns being situated adjacent one of the antenna columns in the fourth set of three antenna columns. ### Claim 11 (depends on 10) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 10, wherein, each of the twelve antenna columns comprises four radiators. ### Claim 12 (depends on 10) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 10, wherein, the radiators are mounted substantially vertically in a linear fashion along the length of the rectangular-shaped antenna columns. ### Claim 13 (depends on 10) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 10, wherein, the radiators are dual polarised antenna elements. ### Claim 14 (depends on 10) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 10, wherein, the 8×8 Multiple-Input Multiple-Output omnidirectional antenna is housed within a tubular shaped radome. ### Claim 15 (depends on 10) An 8×8 Multiple-Input Multiple-Output omnidirectional antenna as claimed in claim 10, wherein, the 8×8 Multiple-Input Multiple-Output omnidirectional antenna operates in one or more of: the 4900 MHz to 6100 MHz frequency range, the 3300 MHz to 3800 MHz frequency range, the 2300 MHz to 3800 MHz frequency range, the 1710 MHz to 2690 MHz frequency range, and, the 689 MHz to 960 MHz frequency range.