An impedance matching device includes a first dielectric substrate; a first transmission line circuit; a first conductive pad which extends toward the first transmission line circuit on the first dielectric substrate to at least partially vertically overlap the first transmission line circuit: a first reference potential layer; and a first matching load which is electrically connected to the first conductive pad and has a first resistance. An area where the first conductive pad vertically overlaps the first transmission line circuit has a size configured such that a load reactance associated with the first transmission line circuit is equal to or less than a predetermined threshold and an absolute value of a difference between a load resistance associated with the first transmission line circuit and the first resistance is equal to or less than a predetermined resistance threshold.

A downhole energy transmission system is described. The system can include a casing string having a number of casing pipe disposed within a wellbore, where the casing string has at least one wall forming a cavity. The system can also include a remote electrical device disposed within the cavity of the casing string at a first location. The system can further include a first stripline cable disposed on an outer surface of the casing string, where the first stripline cable transmits a first energy received from an energy source. The system can also include a second stripline cable disposed adjacent to the first stripline cable at the first location, where the second stripline cable is electrically coupled to the remote electrical device.

An antenna assembly for a transceiver having first antennas arranged on a circuit board, a transmitting and receiving circuit arranged on the circuit board. The first antennas are connected to the transmitting and receiving circuit. Second antennas and terminating resistors are arranged on the circuit board. Each second antenna is connected to one of the terminating resistors by means of a strip line. At least one first contact for measuring HF properties of one of the second antennas and/or at least one second contact for measuring HF properties of the terminating resistor connected to the measurement antenna is arranged on the circuit board. The strip line between the measurement antenna and the terminating resistor is disconnectable at a disconnection point, and the strip line forms, on the side of the disconnection point nearest the measurement antenna, a third contact for measuring the HF properties of the measurement antenna.

Provided is a gigahertz transverse electromagnetic (GTEM) cell for measuring an insertion loss and an insertion loss measurement method using the GTEM cell. The GTEM cell may include an output port configured to measure an insertion loss of a test object occurring when an electromagnetic field having specific intensity is applied to the test object, and may measure the insertion loss of the test object from the GTEM cell based on a change in the intensity of the electromagnetic field measured using the output port.

A terminator has an upper dielectric layer provided on an upper broad wall of a post-wall waveguide, and a microstrip line (MSL) provided on the upper dielectric layer. A blind via has one end thereof connected with one end of the MSL and is inserted inside the post-wall waveguide. A chip resistor has one end thereof connected with the other end of the MSL and has the other end thereof connected with the upper broad wall.

The present invention is directed to an RF termination device that includes a substrate having a first meandered transmission line disposed on a first surface thereof. The meandered first transmission line has a predetermined first transmission line length and a characteristic impedance substantially equal to twice the predetermined system impedance. One end of the first meandered transmission line is configured as an open circuit. A second meandered transmission line is disposed on the first major surface adjacent the first meandered transmission line. The meandered second transmission line has a predetermined second transmission line length and a characteristic impedance substantially equal to twice the predetermined system impedance. One end of the second meandered transmission line is coupled to the other end of the first transmission line and the other end is coupled to ground.

Electrical devices having variable electrical properties. The variable electrical characteristics or operation of the devices are based on the potential applied to a variable-dielectric constant sector associated with the device. The electronic devices or component may include bends, power splitters, filters, ports, phase shifters, frequency shifters, attenuators, couplers, capacitors, inductors, diplexers, hybrids of beam forming networks.

A high-frequency high-power terminator is disclosed. Specifically, the high-frequency high-power terminator has a new structure which uses a resistive element in a distributed element form to achieve broadband matching and to have improved rated power.

A downhole energy transmission system is described. The system can include a tubing string having a number of tubing pipe disposed within an annulus formed by a casing string disposed within a wellbore, where the tubing string has at least one wall forming a cavity. The system can also include a remote electrical device disposed within the cavity of the tubing string at a first location. The system can further include a first stripline cable disposed on an outer surface of the tubing string, where the first stripline cable transmits a first electromagnetic directional traveling wave received from an energy source. The system can also include a second stripline cable disposed adjacent to the first stripline cable at the first location, where the second stripline cable is electrically coupled to the remote electrical device.

A termination circuit terminates a transmission line through which a signal in a high frequency range propagates with excellent termination characteristics. The termination circuit includes a transmission line through which a high frequency signal propagates and capacitive elements terminating the high frequency signal from the transmission line. The transmission line is configured as a transmission line through which the high frequency signal propagates. The capacitive elements are configured as a capacitive element array in which those are connected in cascade, and configured to be connected to an end of the transmission line.