Abstract: A radio-frequency module includes a first base made of a first semiconductor material; a second base that is made of a second semiconductor material having a thermal conductivity lower than that of the first semiconductor material and which includes a power amplifier circuit; a third base including a transmission filter circuit; and a module substrate having a main surface on which the first base, the second base, and the third base are arranged. The first base is joined to the main surface via an electrode. The second base is arranged between the module substrate and the first base in a sectional view and is joined to the main surface via an electrode. At least part of the first base is overlapped with at least part of the second base and at least part of the third base in a plan view.

Abstract: In order to enable intermittent output of an oscillation signal without essentially producing a leak in response to a pulse signal indicating a transmission timing of a radar wave, a radar oscillator is provided which employs a configuration in which an operation of an oscillating unit itself is alternately changed between an oscillating state and an oscillation stop state by a switch, rather than a configuration in which an output passage of an oscillation signal is switched to be opened and closed as in a conventional radar oscillator.

Abstract: In order to enable intermittent output of an oscillation signal without essentially producing a leak in response to a pulse signal indicating a transmission timing of a radar wave, a radar oscillator is provided which employs a configuration in which an operation of an oscillating unit itself is alternately changed between an oscillating state and an oscillation stop state by a switch, rather than a configuration in which an output passage of an oscillation signal is switched to be opened and closed as in a conventional radar oscillator.

Abstract: A radar oscillator has an oscillation unit and first and second switch circuits. The first switch circuit turns off an electric power supply to an amplifier in a non-input period of a pulse signal to set the oscillation unit in a non-oscillation state and turns on the electric power supply to the amplifier in an input period of the pulse signal to set the oscillation unit in an oscillation state. The second switch circuit turns on an electric power supply to an LC resonator in a period immediately before the pulse signal is input in a period in which the pulse signal is not input to supply a current to the LC resonator and turns off the electric power supply to the LC resonator at a timing at which the pulse signal is input, so that activation of an oscillation operation of the oscillation unit is accelerated.

Abstract: The present invention, in order to enable intermittent output of an oscillation signal without essentially producing a leak in response to a pulse signal indicating a transmission timing of a radar wave, employs a configuration in which an operation of an oscillating unit (21) itself of a radar oscillator is alternately changed between an oscillating state and an oscillation stop state by a switch (30), not a configuration in which an output passage of an oscillation signal is switched to be opened and closed as in a conventional radar oscillator.

Abstract: A radar oscillator has an oscillation unit and first and second switch circuits to intermittently output an oscillation signal depending on a pulse signal representing a transmission timing of a transmitting radar signal without causing leakage. The first switch circuit turns off an electric power supply to an amplifier in a non-input period of the pulse signal to set the oscillation unit in a non-oscillation state and turns on the electric power supply to the amplifier in an input period of the pulse signal to set the oscillation unit in an oscillation state.

Abstract: The present invention, in order to enable intermittent output of an oscillation signal without essentially producing a leak in response to a pulse signal indicating a transmission timing of a radar wave, employs a configuration in which an operation of an oscillating unit (21) itself of a radar oscillator is alternately changed between an oscillating state and an oscillation stop state by a switch (30), not a configuration in which an output passage of an oscillation signal is switched to be opened and closed as in a conventional radar oscillator.