An electronic device is provided that includes a board equipped with a pair of differential transmission lines that each have an opening extending between two line terminals. Moreover, the device includes a capacitor module that includes a support and two capacitors that each have two capacitor terminals, respectively, connected to the two line terminals of one line of the pair of transmission lines. In addition, the support includes a separating region between the two capacitors that has at least one cavity disposed between the two capacitors.

A radio frequency power amplifier with harmonic control circuit as well as method for manufacturing the same are disclosed. According to an embodiment, a radio frequency power amplifier includes: a planar dielectric substrate, a first conductive layer and a second conducting layer. The first conductive layer is disposed on a first side of the planar dielectric substrate. The second conducting layer is disposed on a second side of the planar dielectric substrate. The first conductive layer has a pattern comprising one or more harmonic control circuits. The second conductive layer acts as a ground plane. The second side of the planar dielectric substrate is opposite to the first side of the planar dielectric substrate.

A high-frequency line substrate is mounted on a printed circuit board. The printed circuit board includes a first high-frequency line. The high-frequency line substrate includes a second high-frequency line and lead pins that connect the first high-frequency line and the second high-frequency line. At the contact portions between the signal lead pins and the second high-frequency line of the high-frequency line substrate, and at the contact portions between the ground lead pins and the second high-frequency line of the high-frequency line substrate, the height of the ground lead pins from an upper surface of the printed circuit board is greater than the height of the signal lead pins.

Disclosed herein is a bias tee circuit connected between a common terminal and power supply and signal terminals, the bias tee circuit includes a capacitor inserted between the common terminal and the signal terminal, and first and second inductors inserted in series between the common terminal and the power supply terminal. The first inductor is connected on a side of the common terminal. The second inductor is connected on a side of the power supply terminal. The second inductor is higher in self-resonance frequency and lower in Q value than the first inductor.

A circuit for blocking undesired input direct current of AC-coupled broadband circuits. The circuit includes a capacitor coupled to an input port and a common node. The input port receives a RF input signal. Additionally, the circuit includes a current source supplying a DC current to the common node leading a bias current to an output port. Further, the circuit includes a variable voltage source through an internal load and a close loop with an application circuit having an input load coupled to the output port to determine various bias voltages to control the bias current at the output port in association with a RF output signal that is substantially free of any input direct current originated from the RF input signal and is associated with an inherent low cut-off frequency independent of the various bias voltages.

An isolator, circuit, and isolation method are disclosed. An illustrative capacitive isolator is disclosed to include an input side that receives an electrical input signal, an output side that outputs an electrical output signal, and an isolation barrier that electrically isolates the input side from the output side. The input side is further disclosed to include an array of input capacitors, where each capacitor in the array of input capacitors receives an input pulse based on the electrical input signal, where each capacitor in the array of input capacitors receives the input pulse offset from input pulses received at others of the capacitors in the array of input capacitors thereby extending a pulse duration of the electrical input signal.

A bias tee circuit comprises: a combining path having first and second ends and configured to transmit a combined signal which comprises a combination of an RF signal and a DC signal; an RF path having first and second ends and configured to transmit the RF signal included in the combined signal; a DC path having first and second ends and configured to transmit the DC signal included in the combined signal; and an impedance transformer connected between the first end of the combining path, the first end of the RF path and the first end of the DC path, and configured to make the reflection coefficient of the transmitted RF signal have at least two resonant modes within an operating RF band.

A filtering device for use in a medical microwave delivery system is disclosed. The filtering device comprises a DC block and a microwave absorbing element. The microwave absorbing element is disposed around the DC block and/or around one or more elements within the DC block. Also disclosed is a medical microwave delivery system comprising a microwave generator system and the filtering device, wherein the filtering device is coupled to an output of the microwave generator system.

Fabrication of superconducting devices that combine or separate direct currents and microwave signals is provided. A method can comprise forming a direct current circuit that supports a direct current, a microwave circuit that supports a microwave signal, and a common circuit that supports the direct current and the microwave signal. The method can also comprise operatively coupling a first end of the direct current circuit and a first end of the microwave circuit to a first end of the common circuit. The direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a capacitor. Alternatively, the direct current circuit can comprise a bandstop circuit and the microwave circuit can comprise a bandpass circuit. Alternatively, the microwave circuit can comprise a capacitor and the direct current circuit can comprise one or more quarter-wavelength transmission lines.

A packaged RF power amplifier (RFPA) configured to increase video bandwidth is disclosed as well is a process for implementing a RF power device to increase video bandwidth. The RF power device including at least one transistor; an output matching circuit coupled to an output lead and to the at least one transistor; at least one bias feed circuit coupled to the at least one transistor; and at least one coaxial resonator coupled between the at least one transistor and the at least one bias feed circuit.