# US 11,909,121 B2 · Radiating elements having angled feed stalks and base station antennas including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,121 B2 - Document ID: US11909121B2 - Status: Granted - Kind: B2 - Application number: 18/048,085 - Filed: 2022-10-20 - Published: 2023-02-23 - Granted: 2024-02-20 - Earliest claimed: 2020-03-24 - Assignees: CommScope Technologies LLC - Applicants: CommScope Technologies LLC - Inventors: Haifeng Li; Peter J. Bisiules; XiaoHua Hou - Web page: https://patentgrep.com/patent/US11909121B2 ## CPC - H01Q 1/246: {specially adapted for base stations} - H01Q 21/062: {using dipole aerials; (H01Q21/067, H01Q21/068 take precedence)} - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 5/48: Combinations of two or more dipole type antennas - H01Q 9/06: Details - 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 - H04B 7/0413: MIMO systems - H04B 7/0617: {for beam forming} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract Radiating elements of first and second linear arrays of radiating elements have respective feed stalks that can reside at an angle to provide a balanced dipole arm with an inner end portion laterally offset to be closer to a right or left side of the base station antenna and reflector than an outer end portion that faces a radome of the base station antenna. The feed stalk can include sheet metal legs and printed circuit boards providing an RF transmission line(s). ## Claims ### Claim 1 A base station antenna, comprising: a reflector; a first array comprising a column of radiating elements and mounted to be forward of the reflector on a right side portion of the base station antenna; a second array comprising a second column of radiating elements and mounted to be forward of the reflector on a left side portion of the base station antenna; and a multiple column array of radiating elements that is at least partly positioned laterally between the first array and the second array of radiating elements, wherein at least one of the radiating elements of the first and second arrays comprises a feed stalk that projects inwardly toward a front of the base station antenna and comprises a segment that extends at an oblique angle from a primary surface of the reflector. ### Claim 2 (depends on 1) The base station antenna of claim 1, wherein the reflector is attached to or comprises a frequency selective surface that extends laterally and longitudinally in front of the multiple column array. ### Claim 3 (depends on 1) The base station antenna of claim 1, wherein the multiple column array is provided in an active antenna module. ### Claim 4 (depends on 2) The base station antenna of claim 2, wherein the frequency selective surface is configured to reflect radio frequency energy from the radiating elements of the first and second arrays and permit radio frequency energy from the multiple column array to pass therethrough. ### Claim 5 (depends on 1) The base station antenna of claim 1, wherein the radiating elements of the first array and the second array are low-band radiating elements configured to operate in at least a portion of a 617-960 MHz frequency band, and wherein the radiating elements of the multiple column array are higher band radiating elements configured to operate in a higher frequency band than the low-band radiating elements. ### Claim 6 (depends on 1) The base station antenna of claim 1, wherein the multiple column array is provided as a massive multiple input multiple output (mMIMO) array of radiating elements. ### Claim 7 (depends on 6) The base station antenna of claim 6, wherein the mMIMO array of radiating elements are high band radiating elements having an operating frequency band that comprises at least a portion of a 3300-4200 MHz frequency band. ### Claim 8 (depends on 1) The base station antenna of claim 1, wherein the first and second arrays of radiating elements are cross-dipole radiating elements comprising a plurality of arms, and wherein some columns of the multiple column array reside behind and overlap with one or more of the arms of the cross-dipole radiating elements of the first array or the second array. ### Claim 9 (depends on 1) The base station antenna of claim 1, wherein the at least one feed stalk comprises a segment that extends at an angle β measured from a plane of a primary surface of the reflector that is in a range of 30-60 degrees. ### Claim 10 (depends on 1) The base station antenna of claim 1, wherein a back portion of the at least one feed stalk resides closer to a respective closest adjacent side wall of the base station antenna than a front portion thereof and with the front portion being closer to a front radome of the base station antenna, and wherein the feed stalk comprises a radio frequency transmission line. ### Claim 11 (depends on 1) The base station antenna of claim 1, further comprising a frequency selective surface that is separate from the reflector and that extends laterally and longitudinally in front of the multiple column array. ### Claim 12 (depends on 1) The base station antenna of claim 1, wherein at least one column of the multiple column array resides behind a portion of at least one radiating element of the first array with the at least one radiating element of the first array projecting laterally inward across the at least one column, and wherein at least one other column of the multiple column array resides behind a portion of at least one radiating element of the second array with the at least one radiating element of the second array projecting laterally inward across the at least one column. ### Claim 13 A base station antenna, comprising: a reflector; a first array comprising a column of radiating elements and mounted to be forward of the reflector on a right side portion of the base station antenna; a second array comprising a second column of radiating elements and mounted to be forward of the reflector on a left side portion of the base station antenna; and a multiple column array of radiating elements that is at least partly positioned laterally between the first array and the second array of radiating elements, wherein the first and second arrays of radiating elements are cross-dipole radiating elements, each comprising a plurality of arms that project outward from a common center location of a respective cross-dipole radiating element, and wherein a center of a base of a feed stalk of a first of the cross-dipole radiating elements of the first array is laterally offset from the center location of the first of the cross-dipole radiating elements of the first array. ### Claim 14 (depends on 13) The base station antenna of claim 13, wherein the feed stalk of the first of the cross-dipole radiating elements of the first array resides closer to the right side portion of the base station antenna than the center location of the first of the cross-dipole radiating elements of the first array. ### Claim 15 (depends on 13) The base station antenna of claim 13, wherein a center of a base of a feed stalk of a first of the cross-dipole radiating elements of the second array is laterally offset from the center location of the first of the cross-dipole radiating elements of the second array, and wherein the feed stalk of the first of the cross-dipole radiating elements of the second array resides closer to the left side portion of the base station antenna than the center location of the first of the cross-dipole radiating elements of the second array. ### Claim 16 (depends on 13) The base station antenna of claim 13, wherein the base of the feed stalk of the first of the cross-dipole radiating elements of the first array resides closer to the right side portion of the base station antenna than a front portion of the feed stalk of the first of the cross-dipole radiating elements of the first array, with the front portion of the feed stalk of the first of the cross-dipole radiating elements of the first array being closer to a front radome of the base station antenna than the base of the feed stalk of the first of the cross-dipole radiating elements of the first array, and wherein a base of the feed stalk of a first of the cross-dipole radiating elements of the second array resides closer to the left side portion of the base station antenna than a front portion of the feed stalk of the first of the cross-dipole radiating elements of the second array, with the front portion of the feed stalk of the first of the cross-dipole radiating elements of the second array being closer to a front radome of the base station antenna than the base of the feed stalk of the first of the cross-dipole radiating elements of the second array. ### Claim 17 (depends on 13) The base station antenna of claim 13, wherein the reflector is attached to or comprises a frequency selective surface that extends laterally and longitudinally in front of the multiple column array. ### Claim 18 (depends on 13) The base station antenna of claim 13, wherein the multiple column array is provided in an active antenna module. ### Claim 19 (depends on 17) The base station antenna of claim 17, wherein the frequency selective surface is configured to reflect radio frequency energy from the radiating elements of the first and second arrays and permit radio frequency energy from the multiple column array to pass therethrough. ### Claim 20 (depends on 13) The base station antenna of claim 13, wherein the radiating elements of the first array and the radiating elements of second array are low-band radiating elements configured to operate in at least a portion of a 617-960 MHz frequency band, and wherein the radiating elements of the multiple column array are higher band radiating elements configured to operate in a higher frequency band than the low-band radiating elements. ### Claim 21 (depends on 13) The base station antenna of claim 13, wherein the multiple column array is provided as a massive multiple input multiple output (mMIMO) array of radiating elements. ### Claim 22 (depends on 21) The base station antenna of claim 21, wherein the mMIMO array of radiating elements are high band radiating elements having an operating frequency band that comprises at least a portion of a 3300-4200 MHz frequency band. ### Claim 23 (depends on 13) The base station antenna of claim 13, wherein at least one column of the multiple column array resides behind a portion of at least one of the plurality of arms of a respective radiating element of the first array with the portion of at least one of the plurality of arms projecting laterally inward across the at least one column. ### Claim 24 (depends on 13) The base station antenna of claim 13, wherein the feed stalk comprises a radio frequency transmission line.