# US 2014/0197907 A1 · Electromagnetic stripline transmission line structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197907 A1 - Document ID: US20140197907A1 - Status: Published application - Kind: A1 - Application number: 13/739,043 - Filed: 2013-01-11 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Richard William Kautz - Web page: https://patentgrep.com/patent/US20140197907A1 ## CPC - G01R 31/001: {Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing (measuring electromagnetic fields G01R29/08; circuits for generating HV pulses in dielectric strength testing G01R31/14)} - G01R 29/0821: {rooms and test sites therefor, e.g. anechoic chambers, open field sites or TEM cells (for testing antennas G01R29/105)} - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A transmission line structure includes a first transition element, a second transition element, and an active element. The first transition element has a radio frequency injection port and the second transition element, which is spaced from the first transition element, has a radio frequency termination port. An active element is in electrical communication with the first transition element and the second transition element. The active element includes a first and second connection region where the active element is attached to the first and second transition elements. The connection regions are configured to reduce reflection of electromagnetic energy. ## Claims ### Claim 1 A transmission line structure comprising: a first transition element having a radio frequency injection port; a second transition element having a radio frequency termination port; and an active element electrically connected to the first transition element and the second transition element, wherein the active element includes a first connection region where the active element is attached to the first transition element and wherein the first connection region is configured to reduce reflection of electromagnetic energy. ### Claim 2 (depends on 1) The transmission line structure of claim 1, wherein the first connection region is configured to increase an inductance of at least one of the first transition element and the active element. ### Claim 3 (depends on 1) The transmission line structure of claim 1, wherein the first connection region is configured to decrease a capacitance of at least one of the first transition element and the active element. ### Claim 4 (depends on 1) The transmission line structure of claim 1, wherein the first connection region includes at least one ferrite core configured to increase an inductance of at least one of the first transition element and the active element. ### Claim 5 (depends on 1) The transmission line structure of claim 1, wherein the active element includes a second connection region where the active element is attached to the second transition element and wherein the second connection region is configured to reduce reflection of electromagnetic energy. ### Claim 6 (depends on 5) The transmission line structure of claim 5, wherein the second connection region is configured to increase an inductance of at least one of the second transition element and the active element. ### Claim 7 (depends on 5) The transmission line structure of claim 5, wherein the second connection region is configured to decrease a capacitance of at least one of the second transition element and the active element. ### Claim 8 (depends on 5) The transmission line structure of claim 5, wherein the second connection region includes at least one ferrite core configured to increase an inductance of at least one of the second transition element and the active element. ### Claim 9 An electromagnetic compatibility test facility comprising: a ground surface; and a transmission line structure disposed on the ground surface, the transmission line structure having a first transition element having a radio frequency injection port, a second transition element spaced from the first transition element and having a radio frequency termination port, and an active element in electrical communication with the first transition element and the second transition element, wherein the active element includes a first connection region where the active element is attached to the first transition element and wherein the first connection region is configured to reduce reflection of electromagnetic energy. ### Claim 10 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the first connection region is configured to increase an inductance of at least one of the first transition element and the active element. ### Claim 11 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the first connection region is configured to decrease a capacitance of at least one of the first transition element and the active element. ### Claim 12 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the first connection region includes at least one ferrite core configured to increase an inductance of at least one of the first transition element and the active element. ### Claim 13 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the active element includes a second connection region where the active element is attached to the second transition element and wherein the second connection region is configured to reduce reflection of electromagnetic energy. ### Claim 14 (depends on 13) The electromagnetic compatibility test facility of claim 13, wherein the second connection region is configured to increase an inductance of at least one of the second transition element and the active element. ### Claim 15 (depends on 13) The electromagnetic compatibility test facility of claim 13, wherein the second connection region is configured to decrease a capacitance of at least one of the second transition element and the active element. ### Claim 16 (depends on 13) The electromagnetic compatibility test facility of claim 13, wherein the second connection region includes at least one ferrite core configured to increase an inductance of at least one of the second transition element and the active element. ### Claim 17 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the first transition element and second transition element are electrically grounded to the ground surface. ### Claim 18 (depends on 9) The electromagnetic compatibility test facility of claim 9, wherein the active element is spaced from the ground surface. ### Claim 19 (depends on 18) The electromagnetic compatibility test facility of claim 18, wherein a space between the active element and the ground surface is sufficient to receive a device under test. ### Claim 20 A transmission line structure comprising: a first transition element having a radio frequency injection port; a second transition element spaced from the first transition element and having a radio frequency termination port; and an active element in electrical communication with the first transition element and the second transition element, wherein the active element includes a first connection region where the active element is attached to the first transition element and wherein the first connection region is configured to reduce reflection of electromagnetic energy, wherein the first connection region is configured to increase an inductance of at least one of the first transition element and the active element and decrease a capacitance of at least one of the first transition element and the active element wherein the active element further includes a second connection region where the active element is attached to the second transition element and wherein the second connection region is configured to reduce reflection of electromagnetic energy and wherein the second connection region is configured to increase an inductance of at least one of the second transition element and the active element and decrease a capacitance of at least one of the second transition element and the active element.