# US 2021/0242600 A1 · Method and device for calculating directional pattern of beam pointing adjustable antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242600 A1 - Document ID: US20210242600A1 - Status: Published application - Kind: A1 - Application number: 17/054,029 - Filed: 2018-12-28 - Published: 2021-08-05 - Earliest claimed: 2018-05-08 - Assignees: Kuang-Chi Institute of Advanced Technology - Applicants: Kuang-Chi Institute of Advanced Technology - Inventors: RuoPeng LIU; Zhiya ZHAO; Hua TIAN; Yi DING - Web page: https://patentgrep.com/patent/US20210242600A1 ## CPC - H01Q 21/0043: {Slotted waveguides (combination with horns H01Q13/0233)} - H01Q 21/005: {Slotted waveguides arrays} - G01R 29/10: Radiation diagrams of antennas - G06F 30/367: Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods - H01Q 3/267: {Phased-array testing or checking devices} - H01Q 13/085: {Slot-line radiating ends} - H01Q 21/0062: {the slots being disposed around the feeding waveguide} - H01Q 21/29: Combinations of different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence) - H04B 7/0617: {for beam forming} - G01R 29/0871: {Complete apparatus or systems; circuits, e.g. receivers or amplifiers (G01R29/0878, G01R29/0892 take precedence; dosimeters, warning devices G01R29/0857)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04B: TRANSMISSION ## Abstract Provided are a method and device for calculating directional pattern of the beam pointing adjustable antenna. In the method, a scattering parameter of a single slot unit is directly measured, and therefore, operability is strong, and the directional pattern of the beam pointing adjustable antenna is calculated without depending on simulation software. In addition, weighted calculation of the directional pattern of the beam pointing adjustable antenna is realized. Key information such as a form of the slot unit and an arrangement and combination mode of the slot units can be globally optimized. ## Claims ### Claim 1 A method for calculating directional pattern of a beam pointing adjustable antenna, the beam pointing adjustable antenna comprising a plurality of slot units, the method comprising the following steps: S1. obtaining a scattering parameter matrix of a single-slot waveguide corresponding to a single slot unit and a transmission matrix of a seamless waveguide through measurement, and obtaining an equivalent transmission matrix of the single slot unit according to the scattering parameter matrix of the single-slot waveguide and the transmission matrix of the seamless waveguide; S2. obtaining an arrangement and combination mode of the slot units and a beam pointing control code representing on or off state of each slot unit, and obtaining a transmission matrix cascading mode of the beam pointing adjustable antenna according to the arrangement and combination mode, the beam pointing control code, and an equivalent scattering parameter matrix of the single slot unit; and S3. obtaining the directional pattern of the single-slot waveguide excited at the left end and the directional pattern of the single-slot waveguide excited at the right end, and obtaining a composite directional pattern of the beam pointing adjustable antenna according to the directional pattern of the single-slot waveguide excited at the left end, the directional pattern of the single-slot waveguide excited at the right end, and the transmission matrix cascading mode of the beam pointing adjustable antenna. ### Claim 2 (depends on 1) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 1, wherein obtaining the scattering parameter matrix of the single-slot waveguide through measurement in the step S1 comprises: obtaining the scattering parameter matrix of the single-slot waveguide by performing a two-port test on the single-slot waveguide. ### Claim 3 (depends on 1) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 1, wherein the arrangement and combination mode of the slot unit in the step S2 comprises a spacing between the slot units, a form of the slot unit, or a combination of them. ### Claim 4 (depends on 1) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 1, wherein obtaining the transmission matrix of the seamless waveguide in the step S1 comprises: obtaining an equivalent transmission line model of the seamless waveguide; and performing calculation according to the equivalent transmission line model of the seamless waveguide and transmission line matrix theory to obtain the transmission matrix of the seamless waveguide. ### Claim 5 (depends on 1) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 1, wherein the step S3 comprises: obtaining an equivalent input-to-output ratio of a single slot unit according to a transmission matrix of the beam pointing adjustable antenna; obtaining the directional pattern of the single-slot waveguide excited at the left end and the directional pattern of the single-slot waveguide excited at the right end; and obtaining the composite directional pattern according to the directional pattern of the single-slot waveguide excited at the left end, the directional pattern of the single-slot waveguide excited at the right end, and the equivalent input-to-output ratio of the single slot unit. ### Claim 6 (depends on 1) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 1, wherein the beam pointing adjustable antenna is a one-dimensional or two-dimensional array structure. ### Claim 7 A device for calculating directional pattern of the beam pointing adjustable antenna, comprising: a slot transmission matrix obtaining module configured for: obtaining a scattering parameter matrix of a single-slot waveguide corresponding to a single slot unit and a transmission matrix of a seamless waveguide through measurement, and obtaining an equivalent transmission matrix of the single slot unit according to a total transmission matrix of the single-slot waveguide and the transmission matrix of the seamless waveguide; an antenna transmission matrix obtaining module configured for: obtaining an arrangement and combination mode of the slot units and a beam pointing control code representing on or off state of each slot unit, and obtaining a transmission matrix cascading mode of the beam pointing adjustable antenna according to the arrangement and combination mode, the beam pointing control code, and an equivalent scattering parameter matrix of the single slot unit; and an antenna directional pattern generating module configured for: obtaining the directional pattern of the single-slot waveguide excited at the left end and the directional pattern of the single-slot waveguide excited at the right end, and obtaining a composite directional pattern of the beam pointing adjustable antenna according to the directional pattern of the single-slot waveguide excited at the left end, the directional pattern of the single-slot waveguide excited at the right end, and the transmission matrix cascading mode of the beam pointing adjustable antenna; wherein the slot transmission matrix obtaining module, the antenna transmission matrix obtaining module, and the antenna directional pattern generating module are sequentially connected. ### Claim 8 (depends on 7) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 7, wherein the slot transmission matrix obtaining module comprises: a single-slot waveguide measurement submodule configured for: obtaining the scattering parameter matrix of the single-slot waveguide by performing a two-port test on the single-slot waveguide. ### Claim 9 (depends on 7) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 7, wherein the slot transmission matrix obtaining module comprises: a seamless waveguide transmission model obtaining submodule configured for: obtaining an equivalent transmission line model of the seamless waveguide; and a seamless waveguide transmission matrix obtaining submodule configured for: performing calculation according to the equivalent transmission line model of the seamless waveguide and transmission line matrix theory to obtain the transmission matrix of the seamless waveguide; wherein the seamless waveguide transmission model obtaining submodule and the seamless waveguide transmission matrix obtaining submodule are sequentially connected. ### Claim 10 (depends on 7) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 7, wherein the antenna directional pattern generating module comprises: a slot unit equivalent input-output ratio obtaining submodule configured for: obtaining an equivalent input-to-output ratio of a single slot unit according to a transmission matrix of the beam pointing adjustable antenna; a single-slot waveguide directional pattern obtaining submodule configured for: obtaining the directional pattern of the single-slot waveguide excited at the left end and the directional pattern of the single-slot waveguide excited at the right end; and an antenna directional pattern generating submodule configured for: obtaining the composite directional pattern according to the directional pattern of the single-slot waveguide excited at the left end, the directional pattern of the single-slot waveguide excited at the right end, and the equivalent input-to-output ratio of the single slot unit; wherein the slot unit equivalent input-output ratio obtaining submodule, the single-slot waveguide directional pattern obtaining submodule, and the antenna directional pattern generating submodule are sequentially connected. ### Claim 11 (depends on 7) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 7, wherein the arrangement and combination mode of the slot unit comprises a spacing between the slot units, a form of the slot unit, or a combination of them. ### Claim 12 (depends on 7) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 7, wherein the beam pointing adjustable antenna is a one-dimensional or two-dimensional array structure. ### Claim 13 (depends on 10) The device for calculating directional pattern of the beam pointing adjustable antenna according to claim 10, the equivalent input-to-output ratio of the single slot unit is an input ratio a1n at an input end 1 and an input ratio a2n at an output end 2 of the nth slot unit in a two-port equivalent network under a single-port and single-unit excitation. ### Claim 14 (depends on 5) The method for calculating directional pattern of the beam pointing adjustable antenna according to claim 5, the equivalent input-to-output ratio of the single slot unit is an input ratio a1n at an input end 1 and an input ratio a2n at an output end 2 of the nth slot unit in a two-port equivalent network under a single-port and single-unit excitation.