A structure of transmission line includes a first transmission line, a second transmission line and an interlayer via. The first transmission line includes a first line segment, a second segment and a first signal via. The second transmission line includes a third line segment, a fourth segment and a second signal via. Both of the first line segment and the third line segment are disposed in a first signal transmission layer and extend along a first direction. Both of the second line segment and the fourth line segment are disposed in a second signal transmission layer and extend along a second direction. The first signal via is connected to the first line segment and the second line segment. The second signal via is connected to the third line segment and the fourth line segment. The interlayer via is adjacent to the first line segment or the second line segment.

An inhomogeneous dielectric medium high-speed signal trace system includes first and second ground layers. A first dielectric layer has a first dielectric constant and is located adjacent the first ground layer, and a second dielectric layer has a second dielectric constant that is different than the first dielectric constant and is located between the first dielectric layer and the second ground layer. A first differential trace pair is located between the first and second dielectric layer. A plurality of first vias extend between the first ground layer and the second ground layer and are spaced part from each other and the first differential trace pair. A plurality of second vias extend between the first ground layer and the second ground layer, are spaced part from each other and the first differential trace pair, and are located opposite the first differential trace pair from the plurality of first vias.

A wireless communication system includes a first differential signal line, a differential coupler, and an electronic circuit. The differential coupler has a second differential signal line to perform wireless communication of a differential signal with the first differential signal line via electromagnetic field coupling. The electronic circuit is connected to the differential coupler via a wired transmission path to process the differential signal. A surface of a board or a ground pattern of the electronic circuit is inclined or upright with respect to the second differential signal line so as to separate away from a direction in which the first differential signal line extends.

A multilayer substrate includes an insulator that includes a first region and a second region that is thinner than the first region, and a first signal line and a second signal line that are structured to extend across the first region and the second region. In a region in which the first signal line and the second signal line face each other, a line width of the first signal line and a line width of the second signal line are smaller in the second region than in the first region, and a distance between the first signal line and the second signal line is smaller in the second region than in the first region.

A multilayer substrate includes an insulator that includes a first region and a second region that is thinner than the first region, and a first signal line and a second signal line that are structured to extend across the first region and the second region. In a region in which the first signal line and the second signal line face each other, a line width of the first signal line and a line width of the second signal line are smaller in the second region than in the first region, and a distance between the first signal line and the second signal line is smaller in the second region than in the first region.

A two-core flat cable includes a pair of metal wires, an insulating covering that bundles and covers the pair of metal wires along a longitudinal direction thereof, an electrically conductive shield that covers an entire perimeter surface of the covering, and an insulating sheath that covers the shield, wherein the shield is comprised of a metal coating laver, and the sheath is comprised of a lamination sheet of an insulating resin.

A multilayer substrate includes an insulator that includes a first region and a second region that is thinner than the first region, and a first signal line and a second signal line that are structured to extend across the first region and the second region. In a region in which the first signal line and the second signal line face each other, a line width of the first signal line and a line width of the second signal line are smaller in the second region than in the first region, and a distance between the first signal line and the second signal line is smaller in the second region than in the first region.

A device for treating tissue has a plurality of conductors that form one or more transmission lines configured to deliver microwave energy to target tissue. In addition to transmission lines, the device also may include an anchor element used to penetrate the target ablation tissue and anchor the device. A system includes the device, a microwave generator, and a coaxial cable. A biocompatible solution may be injected into the target ablation region to alter tissue properties or to facilitate visualization of the ablation region.

A transmission line includes a substrate, a high-frequency signal transmission line, a differential signal transmission line, and a power supply line. The substrate is insulating, extends in a predetermined direction, and internally includes each of the high-frequency signal transmission line, the differential signal transmission line, and the power supply line. The power supply line and the high-frequency signal transmission line are in parallel or substantially in parallel to each other, and the differential signal transmission line is between the power supply line and the high-frequency signal transmission line.

A wireless communication system includes a first differential signal line, a differential coupler, and an electronic circuit. The differential coupler has a second differential signal line to perform wireless communication of a differential signal with the first differential signal line via electromagnetic field coupling. The electronic circuit is connected to the differential coupler via a wired transmission path to process the differential signal. A surface of a board or a ground pattern of the electronic circuit is inclined or upright with respect to the second differential signal line so as to separate away from a direction in which the first differential signal line extends.