# US 10,483,611 B2 · Waveguide/transmission line converter configured to feed a plurality of antenna elements in an antenna device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,611 B2 - Document ID: US10483611B2 - Status: Granted - Kind: B2 - Application number: 15/560,396 - Filed: 2016-03-18 - Published: 2018-03-08 - Granted: 2019-11-19 - Earliest claimed: 2015-03-23 - Assignees: Japan Radio Co., Ltd. - Applicants: Japan Radio Co., Ltd. - Inventors: Masayuki Sugano - Web page: https://patentgrep.com/patent/US10483611B2 ## CPC - H01P 5/107: Hollow-waveguide/strip-line transitions - H01Q 13/08: Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines - H01Q 21/0006: {Particular feeding systems} - H01Q 21/06: Arrays of individually energised antenna units similarly polarised and spaced apart - H01Q 21/065: {Patch antenna array} - 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) ## Abstract A metal member which allows a waveguide to extend inside a dielectric substrate and is adapted to hold a short-circuit metal layer at a potential same as a potential of the waveguide is made to remain along cross-sections of the two wide walls of the waveguide and is removed along cross-sections of two narrow walls of the waveguide so as to prevent an electromagnetic wave from unintendedly being radiated. ## Claims ### Claim 1 A waveguide/transmission line converter configured to convert power transmitted by a waveguide and power transmitted by at least one transmission line to each other, the waveguide/transmission line converter comprising: the waveguide having two wide walls and two narrow walls; a dielectric substrate arranged in a manner blocking an opening of the waveguide; a short-circuit metal layer arranged on a surface of the dielectric substrate and outside of the waveguide, and held at a potential which is the same as a potential of the waveguide either by a metal member penetrating the dielectric substrate along cross-sections of the two wide walls of the waveguide and not along cross-sections of the two narrow walls of the waveguide or by a metal member penetrating the dielectric substrate along the cross-sections of the two wide walls and a cross-section of one of the two narrow walls of the waveguide and not along a cross-section of the other of the two narrow walls of the waveguide; and a matching element arranged on a surface of the dielectric substrate and inside the waveguide, coupled to the transmission line, and having a resonant length in an electric field direction inside the waveguide and in a feed power direction of the transmission line, wherein the resonant length is adapted to set up, as a standing wave, an electromagnetic wave transmitting the power transmitted by the waveguide and having an effective wavelength in a surrounding environment of the dielectric substrate. ### Claim 2 (depends on 1) The waveguide/transmission line converter according to claim 1, further comprising a dielectric layer formed on surfaces of the transmission line and the short-circuit metal layer. ### Claim 3 (depends on 2) The waveguide/transmission line converter according to claim 2, wherein the dielectric layer has a thickness of 0.2 times or less of an effective wavelength of an electromagnetic wave transmitting the power transmitted by the transmission line in the surrounding environment of the waveguide/transmission line converter. ### Claim 4 (depends on 3) The waveguide/transmission line converter according to claim 3, wherein the power is transmitted by a plurality of transmission lines extending in at least one of two opposite directions away from the waveguide/transmission line converter along a resonant length direction of the matching element. ### Claim 5 (depends on 4) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 4 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column. ### Claim 6 (depends on 3) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 3 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column. ### Claim 7 (depends on 2) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 2 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column. ### Claim 8 (depends on 2) The waveguide/transmission line converter according to claim 2, wherein the power is transmitted by a plurality of transmission lines extending in at least one of two opposite directions away from the waveguide/transmission line converter along a resonant length direction of the matching element. ### Claim 9 (depends on 8) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 8 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column. ### Claim 10 (depends on 1) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 1 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column. ### Claim 11 (depends on 1) The waveguide/transmission line converter according to claim 1, wherein the power is transmitted by a plurality of transmission lines extending in at least one of two opposite directions away from the waveguide/transmission line converter along a resonant length direction of the matching element. ### Claim 12 (depends on 11) An antenna device having a plurality of antenna elements arranged in a lattice shape on a plane, wherein the plurality of antenna elements arranged in a lattice shape are divided into a plurality of antenna elements arranged in columns, the power is fed to the plurality of antenna elements arranged in each column by the transmission line connected to the waveguide/transmission line converter according to claim 11 arranged in a center of each column, the dielectric substrate is the plane on which the plurality of antenna elements are arranged in the lattice shape, cross-sections of the two wide walls of the waveguide are arranged in a direction perpendicular to each column, and cross-sections of the two narrow walls of the waveguide are arranged in a direction parallel to each column.