# US 10,481,250 B2 · Radar antenna system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,250 B2 - Document ID: US10481250B2 - Status: Granted - Kind: B2 - Application number: 15/172,128 - Filed: 2016-06-02 - Published: 2017-05-25 - Granted: 2019-11-19 - Earliest claimed: 2015-11-25 - Assignees: Wistron Neweb Corp. - Applicants: Wistron NeWeb Corporation - Inventors: Guo-Shu Huang; Jeng-Da Li; Hsin-Lung Hsiao - Web page: https://patentgrep.com/patent/US10481250B2 ## CPC - G01S 13/4463: {using phased arrays} - G01S 13/4445: {amplitude comparisons monopulse, i.e. comparing the echo signals received by an antenna arrangement with overlapping squinted beams} - G01S 13/4454: {phase comparisons monopulse, i.e. comparing the echo signals received by an interferometric antenna arrangement} - G01S 13/4481: {Monopulse hybrid systems, e.g. conopulse} - H01Q 21/065: {Patch antenna array} - 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 A radar antenna system comprises a plurality of transmitting sub-arrays; a plurality of receiving sub-arrays; and a transceiving control unit coupled to the plurality of transmitting sub-arrays and the plurality of receiving sub-arrays, configured to control the plurality of transmitting sub-arrays and the plurality of receiving sub-arrays, such that the radar antenna system selectively operates in one of an amplitude-comparison mono-pulse mode and a phase-comparison mono-pulse mode. ## Claims ### Claim 1 A method, applied in a radar antenna system comprising a plurality of transmitting sub-arrays and a plurality of receiving sub-arrays, the method comprising: determining whether an angle of an object in relation to the radar antenna system is greater a specific value and control the plurality of transmitting sub-arrays and the plurality of receiving sub-arrays, such that the radar antenna system selectively operates in one of an amplitude-comparison mono-pulse mode and a phase-comparison mono-pulse mode; when the angle is greater than the specific value, controlling the plurality of transmitting sub-arrays and the plurality of receiving sub-arrays such that the radar antenna system operates in the phase-comparison mono-pulse mode; when the angle is smaller than the specific value, controlling the plurality of transmitting sub-arrays and the plurality of receiving sub-arrays such that the radar antenna system operates in the amplitude-comparison mono-pulse mode. ### Claim 2 (depends on 1) The method of claim 1, wherein a transmitting distance is a distance between a transmitting sub-array and another transmitting sub-array among the plurality of transmitting sub-arrays, a receiving distance is a distance between a receiving sub-array and another receiving sub-array among the plurality of receiving sub-arrays, the transmitting distance is a specific number times compared with the receiving distance, and the specific number is a number of the plurality of receiving sub-arrays. ### Claim 3 (depends on 2) The method of claim 2, wherein the receiving distance is substantially one half of a wavelength of a wireless signal transmitted by the radar antenna system. ### Claim 4 (depends on 2) The method of claim 2, wherein an angular scanning scope of the radar antenna system increases as the receiving distance decreases. ### Claim 5 (depends on 2) The method of claim 2, wherein the receiving distance is smaller than one half of a wavelength of a wireless signal transmitted by the radar antenna system. ### Claim 6 (depends on 1) The method of claim 1, wherein each transmitting sub-array comprises a transmitting phase center, the transmitting phase centers of the plurality of transmitting sub-arrays are aligned with each other; each receiving sub-array comprises a receiving phase center, the receiving phase centers of the plurality of receiving sub-arrays are aligned with each other. ### Claim 7 (depends on 1) The method of claim 1, wherein when the radar antenna system operates in the phase-comparison mono-pulse mode, the radar antenna system performs wireless transmission via a least a transmitting sub-array of the plurality of transmitting sub-arrays, and performs wireless reception via at least two receiving sub-arrays of the plurality of receiving sub-arrays. ### Claim 8 (depends on 1) The method of claim 1, wherein when the radar antenna system operates in the amplitude-comparison mono-pulse mode, the radar antenna system performs wireless transmission via a least two transmitting sub-arrays of the plurality of transmitting sub-arrays, and performs wireless reception via at least two receiving sub-arrays of the plurality of receiving sub-arrays. ### Claim 9 (depends on 1) The method of claim 1, further comprising: determining whether the radar antenna system operates in the amplitude-comparison mono-pulse mode or the phase-comparison mono-pulse mode according to the angle of the object in relation to the radar antenna system. ### Claim 10 (depends on 1) The method of claim 1, further comprising: when the radar antenna system operates in the amplitude-comparison mono-pulse mode, the radar antenna system forming a plurality of beams towards different directions; determining whether the angle is greater than the specific value and determining whether to select from the amplitude-comparison mono-pulse mode to the phase-comparison mono-pulse mode according to an energy of an object reflection signal corresponding to at least one of the plurality of beams.