# US 2021/0242599 A1 · Sidelobe suppression in multi-beam base station antennas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242599 A1 - Document ID: US20210242599A1 - Status: Published application - Kind: A1 - Application number: 17/268,498 - Filed: 2019-08-07 - Published: 2021-08-05 - Earliest claimed: 2018-08-24 - Assignees: CommScope Technologies LLC - Applicants: CommScope Technologies LLC - Inventors: Gangyi Deng; Xiangyang Ai; Gilberto Antonio Guerra Arias - Web page: https://patentgrep.com/patent/US20210242599A1 ## CPC - H01Q 19/185: wherein the surfaces are plane - H01Q 1/246: {specially adapted for base stations} - H01Q 15/08: formed of solid dielectric material - H01Q 15/23: Combinations of reflecting surfaces with refracting or diffracting devices - H01Q 17/001: {for modifying the directional characteristic of an aerial} - H01Q 19/021: {Means for reducing undesirable effects} - H01Q 19/062: {for focusing} - H01Q 19/108: {Combination of a dipole with a plane reflecting surface (H01Q19/106 takes precedence; strip line H01Q9/065)} - H01Q 21/061: {Two dimensional planar arrays} - H01Q 21/08: the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)} - H04B 7/0617: {for beam forming} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract A lensed multi-beam base station antenna may include a plurality of linear arrays of radiating elements, a plurality of reflectors, a sidelobe suppressor, and a lens. Each array may include a plurality of radiating elements (e.g., two or more radiating elements) that extends forwardly from a planar section of a respective reflector. The sidelobe suppressor may comprise radiofrequency (RF) absorber material that absorbs energy that is emitted by a first of the arrays and that is directed toward a reflector underneath a second of the arrays. The sidelobe suppressor may comprise a RF choke that reduces the RF energy emitted by a first of the arrays that is directed toward a reflector underneath a second of the arrays. ## Claims ### Claim 1 An antenna comprising: a housing; at least one lens mounted within the housing; a first reflector and a second reflector; a first array of radiating elements extending forwardly from a front surface of a planar section of the first reflector; a second array of radiating elements extending forwardly from a front surface of a planar section of the second reflector, wherein a first plane comprising the front surface of the planar section of the first reflector and a second plane comprising the front surface of the planar section of the second reflector intersect at an oblique angle; and a sidelobe suppressor configured to reduce first radio frequency (RF) energy emitted by the first array of radiating elements and reflected by the second reflector. ### Claim 2 (depends on 1) The antenna of claim 1, wherein the sidelobe suppressor comprises a RF absorber material covering a portion of the front surface of the planar section of the second reflector, and wherein the front surface of the planar section of the second reflector faces towards the at least one lens. ### Claim 3 (depends on 2) The antenna of claim 2, wherein the RF absorber material covers at least 70% of a surface area of the front surface of the planar section of the second reflector. ### Claim 4 (depends on 2) The antenna of claim 2, wherein the second reflector comprises an outer wall angled with respect to the planar section of the second reflector, wherein the RF absorber material covers an inner surface of the outer wall, and wherein the inner surface faces towards the at least one lens. ### Claim 5 (depends on 2) The antenna of claim 2, wherein the sidelobe suppressor further comprises a RF absorber material covering a portion of a front surface of the planar section of the first reflector, and wherein the front surface of the planar section of the first reflector faces towards the lens. ### Claim 6 (depends on 5) The antenna of claim 5, wherein the RF absorber material covers at least 70% of a surface area of the front surface of the first reflector. ### Claim 7 (depends on 2) The antenna of claim 2, further comprising an inner wall arranged between the planar section of the first reflector and the planar section of the second reflector. ### Claim 8 (depends on 7) The antenna of claim 7, wherein a RF absorber material at least partially covers a surface of the inner wall facing the first array of radiating elements or the second array of radiating elements. ### Claim 9 (depends on 7) The antenna of claim 7, wherein a gap exists between the inner wall and an innermost surface of the RF absorber material covering the portion of the front surface of the planar section of the second reflector. ### Claim 10 (depends on 1) The antenna of claim 1, wherein the sidelobe suppressor comprises a RF choke positioned between the planar section of the first reflector and the planar section of the second reflector. ### Claim 11 (depends on 10) The antenna of claim 10, wherein the RF choke has a length equal to a length of the first array of radiating elements. ### Claim 12 (canceled) ### Claim 13 (depends on 1) The antenna of claim 1, wherein a unitary component comprises the first reflector and the second reflector. ### Claim 14 An antenna comprising: a housing; at least one lens mounted within the housing; a first reflector and a second reflector; a first array of radiating elements extending forwardly from a front surface of a planar section of the first reflector; a second array of radiating elements extending forwardly from a front surface of a planar section of the second reflector, wherein a first plane comprising the front surface of the planar section of the first reflector and a second plane comprising the front surface of the planar section of the second reflector intersect at an oblique angle; radio frequency (RF) absorber material covering a portion of the front surface of the planar section of the first reflector and a portion of the front surface of the planar section of the second reflector, wherein the front surfaces of the planar sections of the first and second reflectors face toward the at least one lens, and wherein the RF absorber material is configured to absorb first RF energy emitted by the first array of radiating elements that is directed toward the second reflector and is configured to absorb second RF energy emitted by the second array of radiating elements that is directed toward the first reflector. ### Claim 15 (depends on 14) The antenna of claim 14, further comprising an inner wall positioned between the first reflector and the second reflector. ### Claim 16 (depends on 15) The antenna of claim 15, wherein the first reflector comprises an outer wall angled with respect to the planar section of the first reflector, wherein the second reflector comprises an outer wall angled with respect to the planar section of the second reflector, and wherein the outer wall of the first reflector and the outer wall of the second reflector extend in parallel to each other. ### Claim 17 (depends on 16) The antenna of claim 16, wherein the RF absorber material covers a portion of an inner surface of the outer wall of the first reflector and covers a portion of an inner surface of the outer wall of the second reflector, wherein the inner surface of the outer wall of the first reflector faces toward the at least one lens, and wherein the inner surface of the outer wall of the second reflector faces toward the at least one lens. ### Claim 18 (depends on 16) The antenna of claim 16, wherein the front surface of the planar section of the first reflector is completely covered by the RF absorber material along a distance from the inner wall to the outer wall of the first reflector. ### Claim 19 (depends on 15) The antenna of claim 15, wherein a portion of the front surface of the planar section of the first reflector that is proximate to the inner wall is uncovered by the RF absorber material. ### Claim 20 An antenna comprising: at least one lens mounted within a housing; a first reflector and a second reflector; a first array of radiating elements extending forwardly from a front surface of a planar section of the first reflector; a second array of radiating elements extending forwardly from a front surface of a planar section of the second reflector, wherein a first plane comprising the front surface of the planar section of the first reflector and a second plane comprising the front surface of the planar section of the second reflector intersect at an oblique angle; a radio frequency (RF) choke positioned between the planar section of the first reflector and the planar section of the second reflector; wherein the RF choke is configured to reduce first RF energy emitted by the first array of radiating elements that is directed toward the second reflector and reduce second RF energy emitted by the second array of radiating elements that is directed toward the first reflector. ### Claim 21 (depends on 20) The antenna of claim 20, wherein the first reflector, second reflector, and RF choke are formed as a unitary component.