# US 2013/0154783 A1 · High-frequency transformer, high-frequency component, and communication terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154783 A1 - Document ID: US20130154783A1 - Status: Published application - Kind: A1 - Application number: 13/705,565 - Filed: 2012-12-05 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Murata Manufacturing Co., Ltd. - Inventors: Noboru KATO - Web page: https://patentgrep.com/patent/US20130154783A1 ## CPC - H01F 27/2804: {Printed windings} - H01F 19/04: Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range (resonant circuits H03H) - H01F 27/2809: {on stacked layers} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract In a high frequency transformer, when a current flows between input-output ports, a magnetic flux produced by first and third coil conductor patterns of a primary coil is interlinked with a second coil conductor pattern of a secondary coil. A magnetic flux produced by the second coil conductor pattern of the primary coil is interlinked with the first and third coil conductor patterns of the secondary coil. The coil conductor patterns are wound so that when a current flows through a transformer, the directions of magnetic fields occurring within the first and third coil conductor patterns of the primary coil and the second coil conductor pattern of the secondary coil are the same and the directions of magnetic fields occurring within the first and third coil conductor patterns of the secondary coil and the second coil conductor pattern of the primary coil are the same. ## Claims ### Claim 1 A high-frequency transformer comprising: a laminated body including a plurality of base material layers that are laminated on one another; and a primary coil and a secondary coil including at least portions thereof that are embedded in the laminated body; wherein the primary coil includes an odd-numbered coil conductor pattern whose coil aperture that includes a first axis, and an even-numbered coil conductor pattern that is series-connected to the odd-numbered coil conductor pattern of the primary coil and whose coil aperture includes a second axis that is parallel or approximately parallel to the first axis of the primary coil; the secondary coil includes an odd-numbered coil conductor pattern whose coil aperture includes the second axis and which is disposed adjacent to the odd-numbered coil conductor pattern of the primary coil, and an even-numbered coil conductor pattern which is series-connected to the odd-numbered coil conductor pattern of the secondary coil, whose coil aperture includes the first axis, and which is disposed adjacent to the even-numbered coil conductor pattern of the primary coil; and the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are wound such that when currents flow through the primary coil and the secondary coil, directions of a magnetic field occurring in the first axis and a magnetic field occurring in the second axis are opposite to each other. ### Claim 2 (depends on 1) The high-frequency transformer according to claim 1, wherein in planar view from a direction in which the first axis extends, at least portions of the odd-numbered coil conductor pattern of the primary coil and the even-numbered coil conductor pattern of the secondary coil do not overlap with each other; and in planar view from a direction in which the second axis extends, at least portions of the odd-numbered coil conductor pattern of the secondary coil and the even-numbered coil conductor pattern of the primary coil do not overlap with each other. ### Claim 3 (depends on 1) The high-frequency transformer according to claim 1, wherein when it is assumed that a direction of a distance between the first axis and the second axis is a first direction and a direction perpendicular or approximately perpendicular to the first direction and perpendicular or approximately perpendicular to a lamination direction of the base material layers is a second direction, widths in the first direction of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are less than widths in the second direction thereof. ### Claim 4 (depends on 1) The high-frequency transformer according to claim 1, wherein all portions of each of the primary coil and the secondary coil are embedded in the laminated body. ### Claim 5 (depends on 1) The high-frequency transformer according to claim 1, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a single turn. ### Claim 6 (depends on 1) The high-frequency transformer according to claim 1, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a plurality of turns. ### Claim 7 (depends on 1) The high-frequency transformer according to claim 1, wherein the laminated body is one of a ceramic laminated body or a resin laminated body. ### Claim 8 (depends on 1) The high-frequency transformer according to claim 1, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are made of one of copper or silver. ### Claim 9 A high-frequency component comprising: a high-frequency transformer including: a laminated body including a plurality of base material layers that are laminated on one another; and a primary coil and a secondary coil including at least portions thereof that are embedded in the laminated body; wherein the primary coil includes an odd-numbered coil conductor pattern whose coil aperture includes a first axis, and an even-numbered coil conductor pattern which is series-connected to the odd-numbered coil conductor pattern of the primary coil and whose coil aperture includes a second axis that is parallel or approximately parallel to the first axis of the primary coil; the secondary coil includes an odd-numbered coil conductor pattern whose coil aperture includes the second axis and which is disposed adjacent to the odd-numbered coil conductor pattern of the primary coil, and an even-numbered coil conductor pattern which is series-connected to the odd-numbered coil conductor pattern of the secondary coil, whose coil aperture includes the first axis, and which is disposed adjacent to the even-numbered coil conductor pattern of the primary coil; and the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are wound such that when currents flow through the primary coil and the secondary coil, directions of a magnetic field occurring in the first axis and a magnetic field occurring in the second axis are opposite to each other. ### Claim 10 (depends on 9) The high-frequency component according to claim 9, wherein in planar view from a direction in which the first axis extends, at least portions of the odd-numbered coil conductor pattern of the primary coil and the even-numbered coil conductor pattern of the secondary coil do not overlap with each other; and in planar view from a direction in which the second axis extends, at least portions of the odd-numbered coil conductor pattern of the secondary coil and the even-numbered coil conductor pattern of the primary coil do not overlap with each other. ### Claim 11 (depends on 9) The high-frequency component according to claim 9, wherein when it is assumed that a direction of a distance between the first axis and the second axis is a first direction and a direction perpendicular or approximately perpendicular to the first direction and perpendicular or approximately perpendicular to a lamination direction of the base material layers is a second direction, widths in the first direction of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are less than widths in the second direction thereof. ### Claim 12 (depends on 9) The high-frequency component according to claim 9, wherein all portions of each of the primary coil and the secondary coil are embedded in the laminated body. ### Claim 13 (depends on 9) The high-frequency component according to claim 9, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a single turn. ### Claim 14 (depends on 9) The high-frequency component according to claim 9, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a plurality of turns. ### Claim 15 A communication terminal device comprising: a high-frequency transformer in a transmission unit of a communication signal, wherein the high-frequency transformer includes a laminated body including a plurality of base material layers that are laminated on one another; and a primary coil and a secondary coil including at least portions thereof that are embedded in the laminated body; wherein the primary coil includes an odd-numbered coil conductor pattern whose coil aperture includes a first axis, and an even-numbered coil conductor pattern which is series-connected to the odd-numbered coil conductor pattern of the primary coil and whose coil aperture includes a second axis that is parallel or approximately parallel to the first axis of the primary coil; the secondary coil includes an odd-numbered coil conductor pattern whose coil aperture includes the second axis and which is disposed adjacent to the odd-numbered coil conductor pattern of the primary coil, and an even-numbered coil conductor pattern which is series-connected to the odd-numbered coil conductor pattern of the secondary coil, whose coil aperture includes the first axis, and which is disposed adjacent to the even-numbered coil conductor pattern of the primary coil; and the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are wound such that when currents flow through the primary coil and the secondary coil, directions of a magnetic field occurring in the first axis and a magnetic field occurring in the second axis are opposite to each other. ### Claim 16 (depends on 15) The communication terminal device according to claim 15, wherein in planar view from a direction in which the first axis extends, at least portions of the odd-numbered coil conductor pattern of the primary coil and the even-numbered coil conductor pattern of the secondary coil do not overlap with each other; and in planar view from a direction in which the second axis extends, at least portions of the odd-numbered coil conductor pattern of the secondary coil and the even-numbered coil conductor pattern of the primary coil do not overlap with each other. ### Claim 17 (depends on 15) The communication terminal device according to claim 15, wherein when it is assumed that a direction of a distance between the first axis and the second axis is a first direction and a direction perpendicular or approximately perpendicular to the first direction and perpendicular or approximately perpendicular to a lamination direction of the base material layers is a second direction, widths in the first direction of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil are less than widths in the second direction thereof. ### Claim 18 (depends on 15) The communication terminal device according to claim 15, wherein all portions of each of the primary coil and the secondary coil are embedded in the laminated body. ### Claim 19 (depends on 15) The communication terminal device according to claim 15, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a single turn. ### Claim 20 (depends on 15) The communication terminal device according to claim 15, wherein each of the odd-numbered coil conductor pattern of the primary coil, the even-numbered coil conductor pattern of the primary coil, the odd-numbered coil conductor pattern of the secondary coil, and the even-numbered coil conductor pattern of the secondary coil includes a plurality of turns.