# US 10,768,035 B2 · Radar-fill-level measuring device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,035 B2 - Document ID: US10768035B2 - Status: Granted - Kind: B2 - Application number: 15/747,198 - Filed: 2016-07-26 - Published: 2018-08-02 - Granted: 2020-09-08 - Earliest claimed: 2015-08-11 - Assignees: Endress+Hauser SE+Co.KG - Applicants: Endress + Hauser GmbH + Co. KG - Inventors: Christian Seiler; Thomas Blodt; Jorg Fuglistaller - Web page: https://patentgrep.com/patent/US10768035B2 ## CPC - G01F 23/284: Electromagnetic waves - G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver - G01S 7/032: {Constructional details for solid-state radar subsystems} - 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) - H01P 3/12: Hollow waveguides (H01P3/20 takes precedence) - H01Q 1/1221: {onto a wall} - H01Q 1/225: {used in level-measurement devices, e.g. for level gauge measurement} - H01Q 13/02: Waveguide horns - H01Q 13/24: constituted by a dielectric or ferromagnetic rod or pipe (H01Q13/28 takes precedence) - H05K 1/024: {Dielectric details, e.g. changing the dielectric material around a transmission line} - H05K 1/0243: {Printed circuits associated with mounted high frequency components} - H01P 5/107: Hollow-waveguide/strip-line transitions - H05K 2201/015: Fluoropolymer, e.g. polytetrafluoroethylene [PTFE] - H05K 2201/0158: Polyalkene or polyolefin, e.g. polyethylene [PE], polypropylene [PP] - H05K 2201/10098: Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas - 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 - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A radar fill-level measuring device for measuring a fill level of a fill substance in a container using the travel time principle, comprising a circuit board with a sending/receiving system for sending and receiving high-frequency radar waves, wherein the circuit board has at least two openings, a hollow conductor having at least two lateral edge projections, wherein lengths of the at least two projections are greater than the thickness of the circuit board, wherein the at least two projections are led through the at least two openings, so that the at least two projections extend partially out from a second side of the circuit board, a lid, which is secured to parts of the at least two projections, which extend out from the second side of the circuit board, such that the hollow conductor is secured to the circuit board by means of the lid. ## Claims ### Claim 1 A radar fill-level measuring device for measuring a fill level of a fill substance in a container using the travel time principle, comprising: a circuit board with a sending/receiving system for sending and receiving high-frequency radar waves and an evaluation unit for determining travel time of the radar waves reflected from a surface of the fill substance, said circuit board has at least two openings, wherein said sending/receiving system has a coupling element for out- and in-coupling of radar waves, an end of said coupling element is arranged on a first side of said circuit board centrally between said at least two openings; a hollow conductor with at least two lateral edge projections, which are embodied as a lengthening of an end of said hollow conductor parallel to the longitudinal axis of said hollow conductor, wherein lengths of said at least two lateral edge projections are greater than the thickness of said circuit board, and wherein said at least two lateral edge projections are led through said at least two openings, so that said at least two lateral edge projections extend partially out from a second side of said circuit board and a lid, which is secured to parts of said at least two lateral edge projections, which extend out from the second side of said circuit board, such that said hollow conductor is secured to said circuit board by means of said lid. ### Claim 2 (depends on 1) The radar fill-level measuring device as claimed in claim 1, wherein: said hollow conductor is embodied as a horn radiator. ### Claim 3 (depends on 1) The radar fill-level measuring device as claimed in claim 1, wherein: said hollow conductor communicates with a horn radiator at an end lying opposite said circuit board. ### Claim 4 (depends on 1) The radar fill-level measuring device as claimed in claim 1, wherein: said lid includes at least two cavities; and said at least two cavities are embodied in such a way that the at least two cavities enter into a shape interlocking connection with parts of said at least two projections extending out from the second side of said circuit board. ### Claim 5 (depends on 4) The radar fill-level measuring device as claimed in claim 4, wherein: said lid is embodied congruently with a surface of said circuit board and with parts of the at least two projections, which extend out from the second side of said circuit board, so that radar waves do not escape to the outside of said hollow conductor or said lid. ### Claim 6 (depends on 1) The radar fill-level measuring device as claimed in claim 1, wherein: said hollow conductor has a circularly shaped, elliptical, rectangular or square cross section. ### Claim 7 (depends on 1) The radar fill-level measuring device as claimed in claim 1, wherein: said circuit board is constructed of at least two plies; at least one of said two plies is composed of a low loss material for high-frequency waves. ### Claim 8 (depends on 7) The radar fill-level measuring device as claimed in claim 7, wherein: said low loss material for high-frequency waves is PEEK, PTFE, PP, PE or Teflon ceramic. ### Claim 9 (depends on 7) The radar fill-level measuring device as claimed in claim 7, wherein: said at least one of said two plies faces in the direction of said hollow chamber.