# US 11,444,700 B2 · Antenna radiation pattern compressive sensing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,700 B2 - Document ID: US11444700B2 - Status: Granted - Kind: B2 - Application number: 16/591,982 - Filed: 2019-10-03 - Published: 2021-04-08 - Granted: 2022-09-13 - Earliest claimed: 2019-10-03 - Assignees: The United States of America as represented by the Secretary of the Army - Applicants: CCDC Army Research Laboratory - Inventors: Michael L. Don - Web page: https://patentgrep.com/patent/US11444700B2 ## CPC - H04B 17/102: {Power radiated at antenna} - G01R 29/10: Radiation diagrams of antennas - H04B: TRANSMISSION - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A method and apparatus for measuring antenna radiation patterns comprising: an array of test antennas coupled to at least one transmitter; an antenna under test located proximate to the array of test antennas and a compressive sensing processor coupled to the antenna under test and the array of test antennas to control signals emitted and received by the antenna under test and the array of test antennas and processing the signals using compressive sensing. ## Claims ### Claim 1 An apparatus for measuring antenna radiation patterns comprising: an array of test antennas; an antenna under test located proximate to the array of test antennas; a compressive sensing processor coupled to the antenna under test and the array of test antennas to control signals emitted and received by the antenna under test and the array of test antennas, processing the received signals using compressive sensing and producing an antenna radiation pattern for the antenna under test wherein the array of test antennas is a spherical array. ### Claim 2 (depends on 1) The apparatus of claim 1 where the array of test antennas is a sparse spherical array. ### Claim 3 (depends on 1) The apparatus of claim 1 where the antenna under test is a transmitting antenna and the array of test antennas are receiving antennas, or the antenna under test is a receiving antenna and the array of test antennas are transmitting antennas. ### Claim 4 (depends on 1) The apparatus of claim 1 where the received signal has sparse data content. ### Claim 5 (depends on 1) The apparatus of claim 1 wherein the processing using compressive sensing is optimized by reducing coherence of a sensing matrix. ### Claim 6 A method for measuring antenna radiation patterns comprising: a) positioning an antenna under test proximate to an array of test antennas; b) controlling signals emitted and received by the antenna under test and the array of test antennas; c) processing the received signals using compressive sensing; and d) producing an antenna radiation pattern for the antenna under test from the processed received signals wherein the array of test antennas is a spherical array. ### Claim 7 (depends on 6) The method of claim 6 where the array of test antennas is a sparse spherical array and the method further comprises rotating the antenna under test after d) and repeating b), c) and d). ### Claim 8 (depends on 6) The method of claim 6 where the array of test antennas is a sparse circular array and the method further comprises rotating the antenna under test after d) along two axes and repeating b), c) and d). ### Claim 9 (depends on 6) The method of claim 6 where the antenna under test is a transmitting antenna and the array of test antennas are receiving antennas, or the antenna under test is a receiving antenna and the array of test antennas are transmitting antennas. ### Claim 10 (depends on 6) The method of claim 6 where the received signal has sparse data content. ### Claim 11 (depends on 6) The method of claim 6 wherein processing using compressive sensing further comprises optimizing the processing by reducing coherence of a sensing matrix. ### Claim 12 (depends on 1) A method for measuring antenna radiation patterns using the apparatus of claim 1. ### Claim 13 (depends on 6) An apparatus for measuring antenna radiation patterns using the method of claim 6. ### Claim 14 An apparatus for measuring antenna radiation patterns comprising: an array of test antennas; an antenna under test located proximate to the array of test antennas; a compressive sensing processor coupled to the antenna under test and the array of test antennas to control signals emitted and received by the antenna under test and the array of test antennas, processing the received signals using compressive sensing and producing an antenna radiation pattern for the antenna under test wherein the array of test antennas is a circular array. ### Claim 15 (depends on 14) The apparatus of claim 14 where the array of test antennas is a sparse circular array. ### Claim 16 (depends on 14) The apparatus of claim 14 where the antenna under test is a transmitting antenna and the array of test antennas are receiving antennas, or the antenna under test is a receiving antenna and the array of test antennas are transmitting antennas. ### Claim 17 (depends on 14) The apparatus of claim 14 where the received signal has sparse data content. ### Claim 18 (depends on 14) The apparatus of claim 14 wherein the processing using compressive sensing is optimized by reducing coherence of a sensing matrix. ### Claim 19 A method for measuring antenna radiation patterns comprising: a) positioning an antenna under test proximate to an array of test antennas; b) controlling signals emitted and received by the antenna under test and the array of test antennas; c) processing the received signals using compressive sensing; and d) producing an antenna radiation pattern for the antenna under test from the processed received signals wherein the array of test antennas is a circular array. ### Claim 20 (depends on 19) The method of claim 19 where the array of test antennas is a circular array and the method further comprises rotating the antenna under test after d) and repeating b), c) and d). ### Claim 21 (depends on 19) The method of claim 19 where the array of test antennas is a sparse circular array and the method further comprises rotating the antenna under test after d) along two-axes and repeating b), c) and d). ### Claim 22 (depends on 19) The method of claim 19 where the antenna under test is a transmitting antenna and the array of test antennas are receiving antennas, or the antenna under test is a receiving antenna and the array of test antennas are transmitting antennas. ### Claim 23 (depends on 19) The method of claim 19 where the received signal has sparse data content. ### Claim 24 (depends on 19) The method of claim 19 wherein processing using compressive sensing further comprises optimizing the processing by reducing coherence of a sensing matrix. ### Claim 25 (depends on 15) A method for measuring antenna radiation patterns using the apparatus of claim 15. ### Claim 26 (depends on 19) An apparatus for measuring antenna radiation patterns using the method of claim 19.