# US 10,771,291 B2 · Communication channel with tuning structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,291 B2 - Document ID: US10771291B2 - Status: Granted - Kind: B2 - Application number: 16/071,175 - Filed: 2016-01-29 - Published: 2019-08-01 - Granted: 2020-09-08 - Earliest claimed: 2016-01-29 - Assignees: Hewlett Packard Enterprise Development LP - Applicants: Hewlett Packard Enterprise Development LP - Inventors: Melvin Benedict; Karl J. Bois - Web page: https://patentgrep.com/patent/US10771291B2 ## CPC - H04L 25/03159: {operating in the frequency domain (H04L25/03165, H04L25/03178 take precedence)} - H01P 1/20363: {Linear resonators} - H05K 1/0246: {Termination of transmission lines} - H05K 1/0251: {related to vias or transitions between vias and transmission lines} - H05K 1/0253: {Impedance adaptations of transmission lines by special lay-out of power planes, e.g. providing openings (H05K1/0251 takes precedence)} - H05K 1/115: {Via connections; Lands around holes or via connections (H05K1/112 takes precedence)} - H05K 3/4038: {Through-connections; Vertical interconnect access [VIA] connections (H05K3/403, H05K3/42 take precedence)} - H01P 1/203: Strip line filters - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An example system includes a communication channel and at least one tuning structure coupled to the communication channel. The tuning structure includes a branch of the communication channel. The tuning structure is to dissipate energy from the communication channel at least at one selected wavelength. The branch of the communication channel is a terminated portion. ## Claims ### Claim 1 A system, comprising: a communication channel; and at least one tuning structure physically coupled to the communication channel, the tuning structure including: a stub extending from the communication channel; and a first protrusion extending from the stub or from the communication channel, wherein the stub and the first protrusion being coupled to the communication channel in one end and is unconnected and terminates in another end and being tuned to dissipate energy from the communication channel at least at one selected wavelength. ### Claim 2 (depends on 1) The system of claim 1, wherein the stub or the first protrusion extending from the communication channel has an electrical length of ¼ of the selected wavelength. ### Claim 3 (depends on 1) The system of claim 1, wherein the tuning structure includes two or more protrusions along the length of the communication channel, the two or more protrusions being separated by a distance of ¼ of the selected wavelength. ### Claim 4 (depends on 1) The system of claim 1, wherein the tuning structure is tuned to dissipate energy from the communication channel at least at two selected wavelengths, wherein the tuning structure includes two or more protrusions along the length of the communication channel, each of the two or more protrusions having a length of ¼ of a corresponding wavelength of the at least two selected wavelengths. ### Claim 5 (depends on 4) The system of claim 4, wherein the two or more protrusions are separated by an electrical distance corresponding to a fundamental frequency. ### Claim 6 A system, comprising: a circuit board stack having a via formed therethrough; a communication channel formed on a first surface of the circuit board stack; and a tuning structure physically coupled to the communication channel, the tuning structure including: a stub extending from the communication channel at least partially through the via; and a first protrusion extending from the stub or from the communication channel, wherein the stub and the first protrusion being coupled to the communication channel in one end and is unconnected and terminates in another end and tuned to dissipate energy from the communication channel at least at one selected wavelength. ### Claim 7 (depends on 6) The system of claim 6, wherein the stub or the first protrusion extending from the communication channel has an electrical length of ¼ of the selected wavelength. ### Claim 8 (depends on 6) The system of claim 6, where the tuning structure further includes protrusions extending from the stub into a region between layers of the circuit board stack. ### Claim 9 (depends on 8) The system of claim 8, wherein the protrusions extending from the stub form a capacitive void with at least one of ground voltage terminals or supply voltage terminals. ### Claim 10 (depends on 6) The system of claim 6, wherein the stub extends through the entire via and is coupled to a trace extension portion formed on a second surface of the circuit board stack. ### Claim 11 A method, comprising: forming a communication channel coupled to an electronic component, the communication channel being to carry an electronic signal; and forming at least one tuning structure physically coupled to the communication channel, the tuning structure including: a stub extending from the communication channel; and a first protrusion extending from the stub or from the communication channel, and wherein the stub and the first protrusion being coupled to the communication channel in one end and is unconnected and terminates in another end and being tuned to dissipate energy from the communication channel at least at one selected wavelength. ### Claim 12 (depends on 11) The method of claim 11, wherein the stub or the first protrusion extending from the communication channel has an electrical length of ¼ of the selected wavelength. ### Claim 13 (depends on 11) The method of claim 11, wherein the tuning structure includes two or more protrusions along the length of the communication channel, the two or more protrusions being separated by a distance of ¼ of the selected wavelength. ### Claim 14 (depends on 11) The method of claim 11, wherein the tuning structure is tuned to dissipate energy from the communication channel at least at two selected wavelengths, wherein the tuning structure includes two or more protrusions along the length of the communication channel, each of the two or more protrusions having a length of ¼ of a corresponding wavelength of the at least two selected wavelengths. ### Claim 15 (depends on 14) The method of claim 14, wherein the two or more protrusions are separated by a distance of an electrical distance corresponding to a fundamental frequency. ### Claim 16 (depends on 1) The system of claim 1, wherein the tuning structure includes a plurality of protrusions extending from the stub into a region between layers of a circuit board stack. ### Claim 17 (depends on 1) The system of claim 1, wherein the stub extends at least partially through a via formed in a printed circuit board stack. ### Claim 18 (depends on 11) The method of claim 11, wherein the stub extends at least partially through a via formed in a printed circuit board stack.