Abstract: According to one embodiment, a high-frequency power combiner has an external conductor and an internal conductor. The external conductor defines an internal space. The internal conductor has an output-side line and a plurality of input-side lines that branch off from the output-side line. The internal conductor is provided in the internal space of the external conductor. The high-frequency power combiner of the embodiment has a structure that can store a liquid in contact with the internal conductor in the internal space.

Abstract: A method of manufacturing a broadside-coupled directional coupler including a main line and a sub line which are broadside-coupled to each other is provided. The method includes at least two adjustment processes. A line width of a coupled line part of the sub line on a first surface of a dielectric substrate is adjusted wherein the dielectric substrate having a second surface being opposite to the first surface, and the second surface has a ground plane. A position of a boundary portion where the ground plane and the coupled line are in contact with each other is adjusted.

Abstract: According to one embodiment, a high-frequency power combiner has an external conductor and an internal conductor. The external conductor defines an internal space. The internal conductor has an output-side line and a plurality of input-side lines that branch off from the output-side line. The internal conductor is provided in the internal space of the external conductor. The high-frequency power combiner of the embodiment has a structure that can store a liquid in contact with the internal conductor in the internal space.

Abstract: A method of manufacturing a broadside-coupled directional coupler including a main line and a sub line which are broadside-coupled to each other is provided. The method includes at least two adjustment processes. A line width of a coupled line part of the sub line on a first surface of a dielectric substrate is adjusted wherein the dielectric substrate having a second surface being opposite to the first surface, and the second surface has a ground plane. A position of a boundary portion where the ground plane and the coupled line are in contact with each other is adjusted.

Abstract: The combiner includes a printed board, first and second conductor plates, and first and second conductor parts. The printed board includes a hole passing from a first surface to a second surface opposite to the first surface. The first conductor plate is made of a copper plate and mounted on the first surface of the printed board to close the hole. The second conductor plate is made of a copper plate and mounted on the second surface of the printed board to close the hole. The first conductor part is opposed to the first conductor plate with a predetermined space between the first conductor part and the first conductor plate. The second conductor part is opposed to the second conductor plate with a predetermined space between the second conductor part and the second conductor plate.

Abstract: A power amplifying apparatus of an embodiment includes a Doherty amplifier, a voltage adjuster, and a central processing unit. The Doherty amplifier is configured to amplify an input signal using a main amplifier and a peak amplifier and outputs an output signal in which the amplified signals are synthesized. The voltage adjuster is configured to supply drain voltages and gate voltages to the main amplifier and the peak amplifier. The central processing unit performs, based on a ratio between a saturated output power and an average output power of the Doherty amplifier, a control of the voltage adjuster to supply the drain voltages and the gate voltages.

Abstract: According to some embodiments, a power amplification apparatus has a Doherty amplifier, a voltage adjuster, and a central processor. The Doherty amplifier includes a carrier amplifier and a peak amplifier. Each of the carrier amplifier and the peak amplifier amplify an input signal. The Doherty amplifier outputs an output signal by combining the amplified signals. The voltage adjuster supplies a control voltage to each of the carrier amplifier and the peak amplifier. The central processor includes a table storing control voltage information of each of the carrier amplifier and the peak amplifier which are included in the Doherty amplifier. The control voltage information is determined in accordance with operations in an average output power of the Doherty amplifier. The central processor controls the voltage adjuster to supply a control voltage, which corresponds to the control voltage information stored in the table, to each of the carrier amplifier and the peak amplifier.

Abstract: The combiner includes a printed board, first and second conductor plates, and first and second conductor parts. The printed board includes a hole passing from a first surface to a second surface opposite to the first surface. The first conductor plate is made of a copper plate and mounted on the first surface of the printed board to close the hole. The second conductor plate is made of a copper plate and mounted on the second surface of the printed board to close the hole. The first conductor part is opposed to the first conductor plate with a predetermined space between the first conductor part and the first conductor plate. The second conductor part is opposed to the second conductor plate with a predetermined space between the second conductor part and the second conductor plate.