# US 11,122,653 B2 · Intermediate transition between an antenna and a coplanar waveguide transmission line of a solid state amplifier > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,653 B2 - Document ID: US11122653B2 - Status: Granted - Kind: B2 - Application number: 16/308,064 - Filed: 2017-09-28 - Published: 2019-10-10 - Granted: 2021-09-14 - Earliest claimed: 2016-09-30 - Assignees: Whirlpool Corporation - Applicants: Whirlpool Corporation - Inventors: Natalia Roumpedaki; Francesco Giordano - Web page: https://patentgrep.com/patent/US11122653B2 ## CPC - H05B 6/686: {Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators} - H05B 6/707: {using waveguides} - H05B 6/72: Radiators or antennas - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A microwave oven having an enclosed cavity is provided including an RF signal generator; a solid state amplifier having a coplanar waveguide transmission line, the amplifier coupled to the RF signal generator for receiving and amplifying the RF signals generated thereby; an intermediate transition including: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the substrate to a second side of the substrate through the first and second dielectrics, where a first end of the center conductor is connected to an output of the amplifier; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation into the cavity. ## Claims ### Claim 1 A microwave oven comprising: an enclosed cavity in which a food load may be placed; an RF signal generator for generating RF signals having selected frequencies and phases; a solid state amplifier comprising a coplanar waveguide transmission line, the solid state amplifier coupled to the RF signal generator for receiving and amplifying the RF signals; an intermediate transition comprising: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the metal boundary to a second side of the metal boundary through the first dielectric and the second dielectric, where a first end of the center conductor is connected to an output of the solid state amplifier; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation having frequencies and phases of the amplified RF signals into the enclosed cavity. ### Claim 2 (depends on 1) The microwave oven of claim 1, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is opposite the first side. ### Claim 3 (depends on 1) The microwave oven of claim 1, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is adjacent the first side. ### Claim 4 (depends on 1) The microwave oven of claim 1, wherein the first and second sections have different cross-sectional shapes. ### Claim 5 (depends on 1) The microwave oven of claim 1, wherein the first and second sections have different lengths. ### Claim 6 (depends on 1) The microwave oven of claim 1, wherein the first and second dielectrics have different dielectric properties. ### Claim 7 (depends on 1) The microwave oven of claim 1, wherein the second end of the center conductor has an opening for receiving a conductive pin of the antenna. ### Claim 8 (depends on 1) The microwave oven of claim 1, wherein the first end of the center conductor has a narrowed cross-section for inserting into an opening formed in an output conductor of the solid state amplifier. ### Claim 9 An RF feed for a microwave oven having an enclosed cavity, the RF feed comprising: an intermediate transition comprising: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the metal boundary to a second side of the metal boundary through the first dielectric and the second dielectric, where a first end of the center conductor is connected to an output of a solid state amplifier to receive amplified RF signals therefrom; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation having frequencies and phases of the amplified RF signals into the enclosed cavity. ### Claim 10 (depends on 9) The RF feed of claim 9, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is opposite the first side. ### Claim 11 (depends on 9) The RF feed of claim 9, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is adjacent the first side. ### Claim 12 (depends on 9) The RF feed of claim 9, wherein the first and second sections have different cross-sectional shapes. ### Claim 13 (depends on 9) The RF feed of claim 9, wherein the first and second sections have different lengths. ### Claim 14 (depends on 9) The RF feed of claim 9, wherein the first and second dielectrics have different dielectric properties. ### Claim 15 (depends on 9) The RF feed of claim 9, wherein the second end of the center conductor has an opening for receiving a conductive pin of the antenna. ### Claim 16 (depends on 9) The RF feed of claim 9 wherein the first end of the center conductor has a narrowed cross-section for inserting into an opening formed in an output conductor of the solid state amplifier. ### Claim 17 An RF feed for a microwave oven having an enclosed cavity, the RF feed comprising: an intermediate transition comprising: a metal boundary having a first section and a second section having different dimensions than that of the first section, wherein the first and second sections have different cross-sectional shapes and different lengths; a first dielectric disposed in the first section; a second dielectric disposed in the second section, wherein the first and second dielectrics have different dielectric properties; and a center conductor extending from a first side of the metal boundary to a second side of the metal boundary through the first dielectric and the second dielectric, where a first end of the center conductor is connected to an output of a solid state amplifier to receive amplified RF signals therefrom; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation having frequencies and phases of the amplified RF signals into the enclosed cavity. ### Claim 18 (depends on 17) The RF feed of claim 17, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is opposite the first side. ### Claim 19 (depends on 17) The RF feed of claim 17, wherein the first side of the metal boundary abuts the solid state amplifier and the second side of the metal boundary is adjacent the first side. ### Claim 20 (depends on 17) The RF feed of claim 17 wherein the second end of the center conductor has an opening for receiving a conductive pin of the antenna.