# US 2021/0239507 A1 · Fill state radar antenna assembly for measuring the fill state in a container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0239507 A1 - Document ID: US20210239507A1 - Status: Published application - Kind: A1 - Application number: 17/251,054 - Filed: 2019-07-02 - Published: 2021-08-05 - Earliest claimed: 2018-07-10 - Assignees: VEGA Grieshaber KG - Applicants: VEGA Grieshaber KG - Inventors: Roland BAUR - Web page: https://patentgrep.com/patent/US20210239507A1 ## CPC - G01F 23/284: Electromagnetic waves - 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 13/88: Radar or analogous systems specially adapted for specific applications (electromagnetic prospecting or detecting of objects, e.g. near-field detection, G01V3/00) - H01Q 1/225: {used in level-measurement devices, e.g. for level gauge measurement} - H01Q 9/04: Resonant antennas - H01Q 9/0407: {Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40)} - H01Q 13/02: Waveguide horns - H01Q 19/062: {for focusing} - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - 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 - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract The present invention relates to a level radar antenna assembly for measuring a level in a container. The level radar antenna assembly comprises a transmitting antenna assembly for transmitting a transmission signal in the direction of a filling material surface of a filling material stored in the container, a receiving antenna assembly for receiving a transmission signal reflected at the filling material surface, and a housing. The transmitting antenna assembly and the receiving antenna assembly are integrated in the housing, the transmitting antenna assembly being larger than the receiving antenna assembly. ## Claims ### Claim 1 A level radar antenna assembly for measuring a level in a container, comprising: a transmitting antenna assembly for transmitting a transmission signal in the direction of a product surface of a product stored in the container, a receiving antenna assembly for receiving a transmission signal reflected at the product surface, and a housing, wherein the transmitting antenna assembly and the receiving antenna assembly are integrated in or attached to the housing, and wherein the transmitting antenna assembly is larger than the receiving antenna assembly. ### Claim 2 (depends on 1) The level radar antenna assembly according to claim 1, wherein the transmitting antenna assembly or the receiving antenna assembly comprises an aperture radiator. ### Claim 3 (depends on 1) The level radar antenna assembly according to claim 1, wherein an aperture of the transmitting antenna assembly is larger than an aperture of the receiving antenna assembly. ### Claim 4 (depends on 3) The level radar antenna assembly according to claim 3, wherein an effective area of the aperture of the transmitting antenna assembly is more than twice as large as an effective area of the aperture of the receiving antenna assembly. ### Claim 5 (depends on 4) The level radar antenna assembly according to claim 4, wherein the sum of the aperture areas of the transmitting antenna assembly and the receiving antenna assembly is greater than 50% and preferably greater than 90% of an area of the housing on which the apertures of the transmitting antenna assembly and the receiving antenna assembly are arranged. ### Claim 6 (depends on 1) The level radar antenna assembly according to claim 1, the transmitting antenna assembly comprising a horn antenna. ### Claim 7 (depends on 1) The level radar antenna assembly according to claim 1, the receiving antenna assembly comprising a horn antenna. ### Claim 8 (depends on 6) The level radar antenna assembly according to claim 6, wherein the horn antenna comprises a lens. ### Claim 9 (depends on 1) The level radar antenna assembly according to claim 1, wherein the transmitting antenna assembly comprises a patch antenna. ### Claim 10 (depends on 1) The level radar antenna assembly according to claim 1, wherein the receiving antenna assembly comprises a patch antenna. ### Claim 11 (depends on 1) A level radar device with the level radar antenna assembly according to claim 1. ### Claim 12 (depends on 11) A container with the level radar device attached to it according to claim 11. ### Claim 13 (depends on 12) The container according to claim 12, wherein a material of the container where the level radar device is mounted is identical to a material of the housing of the level radar antenna assembly. ### Claim 14 (depends on 7) The level radar antenna assembly according to claim 7, wherein the horn antenna comprises a lens.