# US 12,603,423 B2 · Radome design > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,423 B2 - Document ID: US12603423B2 - Status: Granted - Kind: B2 - Application number: 18/240,742 - Filed: 2023-08-31 - Published: 2024-02-29 - Granted: 2026-04-14 - Earliest claimed: 2022-08-31 - Assignees: Aptiv Technologies AG - Applicants: Aptiv Technologies (2) S.à r.l. - Inventors: Armin Talai; Syed An Nazmus Saqueb; Maximilian Hofmann - Web page: https://patentgrep.com/patent/US12603423B2 ## CPC - H01Q 1/3233: {particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems} - H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome - G01S 7/027: {Constructional details of housings, e.g. form, type, material or ruggedness} - G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver - G01S 13/931: of land vehicles - H01Q 1/32: Adaptation for use in or on road or rail vehicles - G01S 2013/93271: {in the front of the vehicles} - G01S 2013/93275: {in the bumper area} - 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 ## Abstract A system includes an antenna configured to emit electromagnetic waves. The system includes a radome having an interior surface facing the antenna. The interior surface at least partially includes a wave-shaped structure configured to reduce reflections of the electromagnetic waves off the interior surface and to increase transmission of the electromagnetic waves through the radome. ## Claims ### Claim 1 A system comprising: an antenna configured to emit electromagnetic waves; and a radome having an interior surface facing the antenna, wherein: the interior surface at least partially includes a wave-shaped structure configured to reduce reflections of the electromagnetic waves off the interior surface and to increase transmission of the electromagnetic waves through the radome, the interior surface of the radome includes a bent plane, the wave-shaped structure is located on the bent plane, a wavelength characterizing the wave-shaped structure is smaller than a wavelength corresponding to an operating frequency of the antenna, and a first wave propagation direction of the wave-shaped structure is parallel to an azimuth plane of the antenna. ### Claim 2 (depends on 1) The system of claim 1 wherein the wave-shaped structure is formed by a plurality of alternating bulges and recesses. ### Claim 3 (depends on 1) The system of claim 1 wherein the wavelength characterizing the wave-shaped structure is smaller than half of the wavelength corresponding to the operating frequency of the antenna. ### Claim 4 (depends on 1) The system of claim 1 wherein the wavelength characterizing the wave-shaped structure corresponds to a distance between two adjacent recurring wave structure elements. ### Claim 5 (depends on 4) The system of claim 4 wherein the wavelength characterizing the wave-shaped structure corresponds to the distance between two adjacent recurring bulges or recesses. ### Claim 6 (depends on 1) The system of claim 1 wherein the operating frequency of the antenna is operating in the millimeter wave frequency band. ### Claim 7 (depends on 6) The system of claim 6 wherein: the operating frequency of the antenna is operating in a range of 76-81 GHz; and the wavelength characterizing the wave-shaped structure is smaller than 3.7 mm. ### Claim 8 (depends on 7) The system of claim 7 wherein the wavelength characterizing the wave-shaped structure is smaller than 2.0 mm. ### Claim 9 (depends on 1) The system of claim 1 wherein the wave-shaped structure extends over an area of the interior surface of the radome covered by a field-of-view of the antenna. ### Claim 10 (depends on 1) The system of claim 1 wherein: a height of the wave-shaped structure is in a range of about 1/4 of a wavelength corresponding to the operating frequency of the antenna, the operating frequency of the antenna is in a range of 76-81 GHz, and the height of the wave-shaped structure is about 1 mm. ### Claim 11 (depends on 1) The system of claim 1 wherein a minimum distance between the antenna and the interior surface of the radome is in a range of 0.5 to 5 mm. ### Claim 12 (depends on 11) The system of claim 11 wherein the minimum distance between the antenna and the interior surface of the radome is in a range of 1 to 3 mm. ### Claim 13 (depends on 1) The system of claim 1 wherein the bent plane of the radome facing the antenna forms a reflex angle. ### Claim 14 (depends on 1) The system of claim 1 wherein at least one of: a second wave propagation direction of the wave-shaped structure is parallel to an elevation plane of the antenna, or the surface of the wave-shaped structure is uniform in a direction parallel to an elevation plane of the antenna. ### Claim 15 (depends on 1) The system of claim 1 wherein: the antenna includes an array of antenna elements that is a planar array of antenna elements; and at least a portion of the interior surface of the radome is parallel to the array of antenna elements. ### Claim 16 (depends on 1) The system of claim 1 wherein the wave-shaped structure includes a rough surface profile with an arithmetic average of the roughness profile Ra of less than 1/10 of a wavelength corresponding to the operating frequency of the antenna. ### Claim 17 A radome for a radar system, the radome comprising a surface that at least partially includes a wave-shaped structure configured to: reduce reflections of electromagnetic waves off an interior surface of the radome; and increase transmission of electromagnetic waves through the radome, wherein: the interior surface of the radome includes a bent plane, the wave-shaped structure is located on the bent plane, a wavelength characterizing the wave-shaped structure is smaller than a wavelength corresponding to an operating frequency of an antenna, and a first wave propagation direction of the wave-shaped structure is parallel to an azimuth plane of the antenna. ### Claim 18 (depends on 17) A vehicle comprising: the radome of claim 17; and the radar system.