# US 10,770,803 B2 · Multi-band base station antennas having crossed-dipole radiating elements with generally oval or rectangularly shaped dipole arms and/or common mode resonance reduction filters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,803 B2 - Document ID: US10770803B2 - Status: Granted - Kind: B2 - Application number: 15/897,388 - Filed: 2018-02-15 - Published: 2018-11-08 - Granted: 2020-09-08 - Earliest claimed: 2017-05-03 - Assignees: CommScope Technologies LLC - Applicants: CommScope Technologies LLC - Inventors: Mohammad Vatankhah Varnoosfaderani; Zhonghao Hu; Ozgur Isik - Web page: https://patentgrep.com/patent/US10770803B2 ## CPC - H01Q 21/062: {using dipole aerials; (H01Q21/067, H01Q21/068 take precedence)} - H01Q 1/246: {specially adapted for base stations} - H01Q 5/364: Creating multiple current paths - H01Q 5/48: Combinations of two or more dipole type antennas - H01Q 9/065: {Microstrip dipole antennas (patch antenna H01Q9/0407)} - H01Q 9/16: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) - H01Q 21/0031: {Parallel-plate fed arrays; Lens-fed arrays (multibeam arrays H01Q25/008)} - H01Q 21/0075: {Stripline fed arrays (H01Q21/065 takes precedence)} - 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 9/265: {Open ring dipoles; Circular dipoles} - H01Q 19/108: {Combination of a dipole with a plane reflecting surface (H01Q19/106 takes precedence; strip line H01Q9/065)} - H01Q 19/24: the primary active element being centre-fed and substantially straight, e.g. H-antenna - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H01Q 25/001: {Crossed polarisation dual antennas (orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A dual-polarized radiating element for a base station antenna includes a first dipole that extends along a first axis, the first dipole including a first dipole arm and a second dipole arm and a second dipole that extends along a second axis, the second dipole including a third dipole arm and a fourth dipole arm and the second axis being generally perpendicular to the first axis, where each of the first through fourth dipole arms has first and second spaced-apart conductive segments that together form a generally oval shape. ## Claims ### Claim 1 A dual-polarized radiating element, comprising: a first dipole that extends along a first axis, the first dipole including a first dipole arm and a second dipole arm; a second dipole that extends along a second axis, the second dipole including a third dipole arm and a fourth dipole arm and the second axis being generally perpendicular to the first axis; wherein each of the first through fourth dipole arms has first and second spaced-apart conductive segments that together form a generally oval shape, wherein each of the first and second conductive segments of the first through fourth dipole arms includes a first widened section that has a first average width, a second widened section that has a second average width and a narrowed section that has a third average width, the narrowed section being between the first widened section and the second widened section, wherein the third average width is less than half the first average width and less than half the second average width. ### Claim 2 (depends on 1) The dual-polarized radiating element of claim 1, wherein distal ends of the first and second conductive segments of the first dipole arm are electrically connected to each other so that the first dipole arm has a closed loop structure. ### Claim 3 (depends on 1) The dual-polarized radiating element of claim 1, wherein the first dipole directly radiates radio frequency (“RF”) signals at a +45° polarization and the second dipole directly radiates RF signals at a −45° polarization. ### Claim 4 (depends on 1) The dual-polarized radiating element of claim 1, wherein a distal end of the first conductive segment of the first dipole arm is spaced-apart from a distal end of the second conductive segment of the first dipole arm so that the first and second conductive segments of the first dipole arm are only electrically connected to each other through proximate ends of the first and second conductive segments of the first dipole arm. ### Claim 5 (depends on 1) The dual-polarized radiating element of claim 1, wherein a conductive plate is mounted above central portions of the first and second dipoles. ### Claim 6 (depends on 5) The dual-polarized radiating element of claim 5, wherein the conductive plate is positioned within a distance of 0.05 times an operating wavelength of the first and second dipoles, where the operating wavelength is the wavelength corresponding to the center frequency of an operating frequency band of the dual-polarized radiating element. ### Claim 7 (depends on 5) A base station antenna having a first linear array of the dual-polarized radiating elements of claim 5 and a second linear array of the dual-polarized radiating elements of claim 5, wherein the conductive plates included on each dual-polarized radiating element are configured to shift a frequency of a common mode resonance that is within an operating frequency band of the first and second linear arrays and that is generated on the second linear array when the first linear array transmits signals so that the common mode resonance falls outside the operating frequency band. ### Claim 8 (depends on 1) The dual-polarized radiating element of claim 1, further comprising at least one feed stalk that extends generally perpendicular to a plane defined by the first and second dipoles. ### Claim 9 (depends on 1) The dual-polarized radiating element of claim 1, wherein the narrowed section comprises a meandered conductive trace. ### Claim 10 (depends on 1) The dual-polarized radiating element of claim 1, wherein the narrowed section creates a high impedance for currents that are at a frequency that is approximately twice the highest frequency in the operating frequency range of the dual-polarized radiating element. ### Claim 11 (depends on 1) The dual-polarized radiating element of claim 1, wherein the first and second conductive segments of each dipole arm comprise conductive segments of a printed circuit board. ### Claim 12 (depends on 1) The dual-polarized radiating element of claim 1, wherein, at least half of an area between the first and second conductive segments of the first dipole arm comprises open area. ### Claim 13 (depends on 1) The dual-polarized radiating element of claim 1, wherein a first meandered trace of the first conductive segment of the first dipole arm and a second meandered trace of the second conductive segment of the first dipole arm extend into an interior section of the first dipole arm that is between the first and second conductive segments of the first dipole arm. ### Claim 14 (depends on 1) The dual-polarized radiating element of claim 1, wherein all of the meandered trace segments on the first dipole arm extend towards an interior section of the first dipole arm that is between the first and second conductive segments of the first dipole arm. ### Claim 15 A dual-polarized radiating element, comprising: a first dipole that extends along a first axis, the first dipole including a first dipole arm and a second dipole arm; a second dipole that extends along a second axis, the second dipole including a third dipole arm and a fourth dipole arm and the second axis being generally perpendicular to the first axis; wherein each of the first through fourth dipole arms has first and second spaced-apart conductive segments that together form a generally oval shape, wherein a combined surface area of the first and second conductive segments that form the first dipole arm is greater than a combined surface area of the first and second conductive segments that form the second dipole arm. ### Claim 16 (depends on 15) The dual-polarized radiating element of claim 15 mounted on a base station antenna, wherein the first dipole arm is closer to a side edge of the base station antenna than is the second dipole arm. ### Claim 17 (depends on 15) The dual-polarized radiating element of claim 15, wherein the first dipole directly radiates radio frequency (“RF”) signals at a +45° polarization and the second dipole directly radiates RF signals at a −45° polarization. ### Claim 18 (depends on 15) The dual-polarized radiating element of claim 15, wherein a first meandered trace of the first conductive segment of the first dipole arm and a second meandered trace of the second conductive segment of the first dipole arm extend into an interior section of the first dipole arm that is between the first and second conductive segments of the first dipole arm. ### Claim 19 (depends on 15) The dual-polarized radiating element of claim 15, wherein distal ends of the first and second conductive segments of the first dipole arm are electrically connected to each other so that the first dipole arm has a closed loop structure.