# US 2025/0096484 A1 · Dual polarity antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0096484 A1 - Document ID: US20250096484A1 - Status: Published application - Kind: A1 - Application number: 18/959,221 - Filed: 2024-11-25 - Published: 2025-03-20 - Earliest claimed: 2022-05-31 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Ignacio GONZALEZ; Grzegorz WOLOSINSKI; Bruno BISCONTINI - Web page: https://patentgrep.com/patent/US20250096484A1 ## CPC - H01Q 1/521: {reducing the coupling between adjacent 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 9/0478: {with means for suppressing spurious modes, e.g. cross polarisation} - H01Q 9/16: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) - H01Q 9/30: with feed to end of elongated active element, e.g. unipole (H01Q9/44 takes precedence) - H01Q 21/0006: {Particular feeding systems} - H01Q 25/001: {Crossed polarisation dual antennas (orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161)} - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H01Q 21/29: Combinations of different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract In some examples, a dual polarity antenna includes a dual polarity radiator. The dual polarity radiator includes a first radiator having a first polarity and a second radiator having a second polarity orthogonal to the first polarity. The dual polarity antenna further includes an ancillary radiator. The dual polarity antenna further includes a feeding network for feeding a radio-frequency (RF) signal to both the first radiator and the ancillary radiator, driving the first radiator to radiate a wave having a first polarisation, causing radiation of a spurious wave having a polarisation orthogonal to the first polarisation, and driving the ancillary radiator to radiate a wave that cancels the spurious wave at least partly. ## Claims ### Claim 1 A dual polarity antenna, comprising: a dual polarity radiator, comprising a first radiator having a first polarity and a second radiator having a second polarity orthogonal to the first polarity; an ancillary radiator; and a feeding network for feeding a radio-frequency (RF) signal to both the first radiator and the ancillary radiator, driving the first radiator to radiate a wave having a first polarisation, causing radiation of a spurious wave having a polarisation orthogonal to the first polarisation, and driving the ancillary radiator to radiate a wave that cancels the spurious wave at least partly. ### Claim 2 (depends on 1) The dual polarity antenna of claim 1, wherein the feeding network comprises one or more delay elements. ### Claim 3 (depends on 1) The dual polarity antenna of claim 1, wherein the feeding network is configured so that the RF signal has a lower amplitude at the ancillary radiator than at the first radiator. ### Claim 4 (depends on 1) The dual polarity antenna of claim 1, wherein the ancillary radiator comprises two or more monopole antennas. ### Claim 5 (depends on 1) The dual polarity antenna of claim 1, wherein the ancillary radiator comprises two or more dipole antennas. ### Claim 6 (depends on 4) The dual polarity antenna of claim 4, wherein the two or more monopole antennas are placed symmetrically with respect to the dual polarity radiator. ### Claim 7 (depends on 5) The dual polarity antenna of claim 5, wherein the two or more dipole antennas are placed symmetrically with respect to the dual polarity radiator. ### Claim 8 (depends on 1) The dual polarity antenna of claim 1, wherein the ancillary radiator is a first ancillary radiator, the feeding network is a first feeding network, and the dual polarity antenna further comprises: a second ancillary radiator and a second feeding network, wherein the RF signal is a first RF signal, the spurious wave is a first spurious wave, the second feeding network is configured for feeding a second RF signal to both the second radiator and to the second ancillary radiator, driving the second radiator to radiate a wave having a second polarisation, causing generation of a second spurious wave having a polarisation orthogonal to the second polarisation, and driving the second ancillary radiator to radiate a wave that cancels the second spurious wave at least partly. ### Claim 9 An antenna array comprising a plurality of dual polarity antennas, wherein each dual polarity antenna of the plurality of dual polarity antennas comprises: a dual polarity radiator, comprising a first radiator having a first polarity and a second radiator having a second polarity orthogonal to the first polarity; an ancillary radiator; and a feeding network for feeding a radio-frequency (RF) signal to both the first radiator and the ancillary radiator, driving the first radiator to radiate a wave having a first polarisation, causing radiation of a spurious wave having a polarisation orthogonal to the first polarisation, and driving the ancillary radiator to radiate a wave that cancels the spurious wave at least partly. ### Claim 10 (depends on 9) The antenna array of claim 9, wherein the plurality of dual polarity antennas forms a massive multiple-input and multiple-output (mMIMO) antenna array. ### Claim 11 (depends on 9) The antenna array of claim 9, wherein the feeding network comprises one or more delay elements. ### Claim 12 (depends on 9) The antenna array of claim 9, wherein the feeding network is configured so that the RF signal has a lower amplitude at the ancillary radiator than at the first radiator. ### Claim 13 (depends on 9) The antenna array of claim 9, wherein the ancillary radiator comprises two or more monopole antennas. ### Claim 14 (depends on 9) The antenna array of claim 9, wherein the ancillary radiator comprises two or more dipole antennas. ### Claim 15 (depends on 13) The antenna array of claim 13, wherein the two or more monopole antennas are placed symmetrically with respect to the dual polarity radiator. ### Claim 16 (depends on 14) The antenna array of claim 14, wherein the two or more dipole antennas are placed symmetrically with respect to the dual polarity radiator. ### Claim 17 (depends on 9) The antenna array of claim 9, wherein the ancillary radiator is a first ancillary radiator, the feeding network is a first feeding network, and the dual polarity antenna further comprises: a second ancillary radiator and a second feeding network, wherein the RF signal is a first RF signal, the spurious wave is a first spurious wave, the second feeding network is configured for feeding a second RF signal to both the second radiator and to the second ancillary radiator, driving the second radiator to radiate a wave having a second polarisation, causing generation of a second spurious wave having a polarisation orthogonal to the second polarisation, and driving the second ancillary radiator to radiate a wave that cancels the second spurious wave at least partly. ### Claim 18 A method of transmitting a radio-frequency (RF) signal, the method comprising: feeding the RF signal to a first radiator having a first polarity and to a first ancillary radiator; driving the first radiator to radiate a wave having a first polarisation; causing radiation of a spurious wave having a polarisation orthogonal to the first polarisation; and driving the first ancillary radiator to radiate a wave that cancels the spurious wave at least partly. ### Claim 19 (depends on 18) The method of claim 18, wherein the RF signal has a lower amplitude at the ancillary radiator than at the first radiator. ### Claim 20 (depends on 18) The method of claim 18, further comprising: feeding a second RF signal to a second radiator having a second polarity and a second ancillary radiator, wherein the RF signal is a first RF signal, and the spurious wave is a first spurious wave; driving the second radiator to radiate a wave having a second polarisation; causing generation of a second spurious wave having a polarisation orthogonal to the second polarisation; and driving the second ancillary radiator to radiate a wave that cancels the second spurious wave at least partly.