# US 12,003,031 B2 · Dual-polarized microstrip patch antenna and array > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,031 B2 - Document ID: US12003031B2 - Status: Granted - Kind: B2 - Application number: 17/094,421 - Filed: 2020-11-10 - Published: 2021-05-27 - Granted: 2024-06-04 - Earliest claimed: 2019-11-21 - Assignees: The Board of Regents of the University of Oklahoma - Applicants: The Board of Regents of the University of Oklahoma - Inventors: Hadi Saeidi Manesh; Guifu Zhang - Web page: https://patentgrep.com/patent/US12003031B2 ## CPC - 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)} - G01S 7/025: {involving the transmission of linearly polarised waves} - G01S 13/951: {ground based} - H01Q 1/48: Earthing means; Earth screens; Counterpoises - H01Q 9/0457: {electromagnetically coupled to the feed line} - H01Q 19/005: {Patch antenna using one or more coplanar parasitic elements} - H01Q 21/0025: {Modular arrays} - H01Q 21/065: {Patch antenna array} - G01S 13/95: for meteorological use - G01S 2013/0245: {Radar with phased array antenna} - Y02A 90/10: Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract A microstrip patch antenna comprising: a unit cell comprising: a plurality of layers comprising: a first laminate comprising one or more horizontal polarization feed lines and one or more vertical polarization feed lines, a second laminate comprising a radiating square patch, and a third laminate comprising a parasitic patch; and a ground plane comprising one or more polarization slots. A differential feed antenna comprising: a balun; a plurality of feed lines; and one or more polarization ports configured to excite at a plurality of locations. ## Claims ### Claim 1 A microstrip patch antenna comprising: a unit cell comprising: a plurality of layers comprising: a first laminate comprising one or more horizontal polarization feed lines and one or more vertical polarization feed lines, a second laminate comprising a radiating square patch, and a third laminate comprising a parasitic patch; and a ground plane positioned between the first laminate and the third laminate and comprising one or more polarization slots. ### Claim 2 (depends on 1) The microstrip patch antenna of claim 1, wherein the plurality of layers further comprises an adhesive material positioned between the first laminate and the second laminate and between the second laminate and the third laminate. ### Claim 3 (depends on 1) The microstrip patch antenna of claim 1, wherein the parasitic patch is positioned adjacent to the radiating square patch. ### Claim 4 (depends on 1) The microstrip patch antenna of claim 1, wherein the plurality of layers further comprises metalized apertures. ### Claim 5 (depends on 1) The microstrip patch antenna of claim 1, wherein the one or more polarization slots comprise a horizontal polarization slot positioned symmetrically with respect to a horizontal plane and a vertical plane. ### Claim 6 (depends on 5) The microstrip patch antenna of claim 5, wherein the horizontal polarization slot is positioned in a middle of the ground plane. ### Claim 7 (depends on 1) The microstrip patch antenna of claim 1, further comprising one or more horizontal polarization ports, wherein the one or more horizontal polarization ports are offset. ### Claim 8 (depends on 7) The microstrip patch antenna of claim 7, further comprising one or more vertical polarization ports orthogonal to the one or more horizontal polarization ports. ### Claim 9 (depends on 1) The microstrip patch antenna of claim 1, wherein the one or more horizontal polarization feed lines are mirrored. ### Claim 10 A microstrip patch antenna subarray comprising: a plurality of unit cells, each comprising: a first laminate comprising one or more horizontal polarization feed lines and one or more vertical polarization feed lines, a second laminate comprising a radiating square patch, a third laminate comprising a parasitic patch, and a ground plane positioned between the first laminate and the third laminate and comprising one or more polarization slots. ### Claim 11 (depends on 10) The microstrip patch antenna subarray of claim 10, further comprising: one or more horizontal polarization ports offset from each other; and one or more vertical polarization ports orthogonal to the one or more horizontal polarization ports. ### Claim 12 (depends on 10) The microstrip patch antenna subarray of claim 10, wherein the one or more horizontal polarization feed lines are mirrored. ### Claim 13 (depends on 10) The microstrip patch antenna subarray of claim 10, wherein each of the plurality of unit cells further comprises an adhesive material positioned between the first laminate and the second laminate and between the second laminate and the third laminate. ### Claim 14 (depends on 10) The microstrip patch antenna subarray of claim 10, wherein the parasitic patch is positioned adjacent to the radiating square patch. ### Claim 15 (depends on 10) The microstrip patch antenna subarray of claim 10, wherein each of the plurality of unit cells further comprises metalized apertures. ### Claim 16 (depends on 10) The microstrip patch antenna subarray of claim 10, wherein the one or more polarization slots comprise a horizontal polarization slot positioned symmetrically with respect to a horizontal plane and a vertical plane. ### Claim 17 An antenna array comprising: a plurality of microstrip patch antennas, wherein each of the microstrip patch antennas comprises a unit cell, wherein the unit cell comprises: a plurality of layers comprising: a first laminate comprising one or more horizontal polarization feed lines and one or more vertical polarization feed lines, a second laminate comprising a radiating square patch, and a third laminate comprising a parasitic patch; and a ground plane positioned between the first laminate and the third laminate and comprising one or more polarization slots. ### Claim 18 (depends on 17) The antenna array of claim 17, wherein the plurality of layers further comprises an adhesive material positioned between the first laminate and the second laminate and between the second laminate and the third laminate. ### Claim 19 (depends on 17) The antenna array of claim 17, wherein the parasitic patch is positioned adjacent to the radiating square patch. ### Claim 20 (depends on 17) The antenna array of claim 17, wherein the plurality of layers further comprises metalized apertures. ### Claim 21 (depends on 10) The microstrip patch antenna subarray of claim 10, further comprising four elements, wherein the four elements comprise horizontal polarization ports that are positionally mirrored and comprise a 180 degree (°) phase shift with respect to each other. ### Claim 22 (depends on 1) The microstrip patch antenna of claim 1, wherein the one or more polarization slots comprise three horizontal polarization slots that are H-shaped and independent of each other.