# US 8,540,523 B2 · Connection device for high frequency signals between a connector and a transmission line > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,523 B2 - Document ID: US8540523B2 - Status: Granted - Kind: B2 - Application number: 12/879,951 - Filed: 2010-09-10 - Published: 2011-09-08 - Granted: 2013-09-24 - Earliest claimed: 2009-09-11 - Assignees: Thales; Groupe des Telecommunications/Ecole Nationale Superieure des Telecoms Bretagne - Applicants: Pascal Cornic; Jean-Philippe Coupez; Jérémie Hemery; Julien Boucher - Inventors: Pascal Cornic; Jean-Philippe Coupez; Jérémie Hemery; Julien Boucher - Web page: https://patentgrep.com/patent/US8540523B2 ## CPC - H05K 1/0243: {Printed circuits associated with mounted high frequency components} - H01P 5/085: {Coaxial-line/strip-line transitions} - H05K 1/025: {Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance (H05K1/024 and H05K1/0243 take precedence; for semiconductor devices H10W44/20)} - H05K 1/0219: {Printed shielding conductors for shielding around or between signal conductors, e.g. coplanar or coaxial printed shielding conductors} - H05K 1/0253: {Impedance adaptations of transmission lines by special lay-out of power planes, e.g. providing openings (H05K1/0251 takes precedence)} - H05K 2201/09618: Via fence, i.e. one-dimensional array of vias - H05K 2201/0969: Apertured conductors - H05K 2201/09727: Varying width along a single conductor; Conductors or pads having different widths - H05K 2201/09809: Coaxial layout - H05K 2201/10189: Non-printed connector - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) ## Abstract A connection device for high frequency signals is disclosed. The connection device includes a printed circuit having an external face and a transmission line printed on the external face, and a coaxial connector surface mounted on the external face of the printed circuit. The transmission line is connected to the connector by means of a bump contact belonging to the transmission line. A central core of the connector is connected to the bump contact. The printed circuit has at least one internal ground plane disposed parallel to the external face and contributing to the matching of the transmission line. The internal ground plane defines a perforation therethrough that faces the bump contact. ## Claims ### Claim 1 A connection device for high frequency signals, comprising: a printed circuit having an external face and a transmission line printed on the external face; and a coaxial connector surface mounted on the external face of the printed circuit, wherein the transmission line is connected to the connector by means of a bump contact belonging to the transmission line to which is attached a central core of the connector, the printed circuit having at least one internal ground plane disposed parallel to the external face and contributing to the matching of the transmission line, the internal ground plane defining a perforation therethrough that faces the bump contact. ### Claim 2 (depends on 1) The device according to claim 1, wherein the printed circuit further comprises a second ground plane disposed parallel to the internal ground plane, the internal ground plane being situated between the transmission line and the second ground plane, the second ground plane being continuous facing the bump contact. ### Claim 3 (depends on 2) The device according to claim 2, wherein the transmission line further comprises, in the vicinity of the bump contact, a low-pass filtering cell cooperating with the impedance added by the transition between the central core of the connector and the bump contact. ### Claim 4 (depends on 3) The device according to claim 3, wherein the filtering cell further comprises an inductive line section and a capacitive line section. ### Claim 5 (depends on 2) The device according to claim 2, wherein the bump contact is circular and centered on an axis, and wherein the perforation is circular and centered on the axis. ### Claim 6 (depends on 5) The device according to claim 5, wherein a diameter of the perforation is greater than a diameter of the bump contact so as to limit an impedance generated between the bump contact and the internal ground plane. ### Claim 7 (depends on 2) The device according to claim 2, wherein the bump contact is circular and centered on a first axis, and wherein the perforation has a circular part centered on the first axis and an elongate part extending along a second axis parallel to a main direction of a rectilinear part of the transmission line in contact with the bump contact. ### Claim 8 (depends on 1) The device according to claim 1, wherein the transmission line further comprises, in the vicinity of the bump contact, a low-pass filtering cell cooperating with an impedance added by the transition between the central core of the connector and the bump contact. ### Claim 9 (depends on 8) The device according to claim 8, wherein the filtering cell comprises an inductive line section and a capacitive line section. ### Claim 10 (depends on 1) The device according to claim 1, wherein the bump contact is circular and centered on an axis, and wherein the perforation is circular and centered on the axis. ### Claim 11 (depends on 10) The device according to claim 10, wherein a diameter of the perforation is greater than a diameter of the bump contact so as to limit an impedance generated between the bump contact and the internal ground plane. ### Claim 12 (depends on 1) The device according to claim 1, wherein the bump contact is circular and centered on a first axis, and wherein the perforation has a circular part centered on the first axis and an elongate part extending along a second axis parallel to a main direction of a rectilinear part of the transmission line in contact with the bump contact. ### Claim 13 (depends on 12) The device according to claim 12, wherein a projection of the transmission line onto the internal ground plane maintains a distance relative to the edge of the perforation that is substantially constant, wherein the distance is measured on the one hand between the bump contact and the circular part of the perforation and on the other hand between the rectilinear part of the transmission line and the edge of the perforation, and wherein the distance is measured perpendicular to the main direction of the rectilinear part.