Abstract: A radio frequency circuit includes a first switch circuit, a second switch, and a transceiver circuit portion connected. The first switch includes first and second common terminals connected to first and second antenna connection terminals and first and second selection terminals. The second switch circuit includes a third common terminal connected to the first selection terminal and a third selection terminal connected to a first reception filter having a pass band including a first band. The transceiver circuit portion is connected to the second selection terminal of the first switch circuit, and includes a transmission path for the first band and a second reception path for the first band.

Abstract: A radio frequency circuit includes first and second filters for first and second time division duplex (TDD) bands. Third and fourth filters cover third and fourth bands. A switch including a first terminal, a second terminal, and a third terminal to connect these filter to an antenna. The first terminal is connected to only the first filter and the second terminal is connected to only the second filter, among the filters having acoustic wave filters. The third terminal connects to both the third filter and the fourth filter. This configuration enables simultaneous transfer of a transmission signal of the first band and a reception signal of the second band, as well as simultaneous transfer of signals of the third and fourth bands. By isolating the TDD filters on separate terminals, signal quality and isolation are improved during simultaneous operation.

Abstract: A radio-frequency circuit includes a filter circuit and a power amplifier circuit. The filter circuit includes a first pass band corresponding to a band of a cellular communication system and a second pass band corresponding to a band of a satellite communication system. The power amplifier is connected to the filter circuit. The second pass band is positioned between the first pass band and a third pass band corresponding to a band of a satellite navigation system, or the second pass band at least partially matches the first pass band.

Abstract: A radio frequency circuit includes: an antenna connection terminal; an antenna connection terminal; a first power amplifier; a second power amplifier; a first filter in a first signal path between the antenna connection terminal and the first power amplifier and having a passband including a transmission band of a first band; a second filter in a second signal path between the antenna connection terminal and the second power amplifier and having a passband including a transmission band of a second band; and a switch configured to selectively couple an output of the power amplifier and one of the first signal path and the second signal path.

Abstract: A high frequency module includes a SAW filter, a substrate over which the SAW filter is mounted, a shield electrode, a ground electrode, and a connection member. The SAW filter has major surfaces opposite to each other and a side surface. The shield electrode covers at least part of the side surface of the SAW filter. The ground electrode is disposed on the substrate, and is connected to a ground potential. The connection member is disposed outside the SAW filter, and electrically connects the shield electrode to the ground electrode.

Abstract: A radio frequency circuit includes: first and second power amplifiers; a low-noise amplifier; first and second switches; a first filter for a first band; a second filter for a second band; and third and fourth filters for a third band for time division duplex. Triple beat distortion that occurs due to two signals in the first band and a signal in the second band overlaps the third band. The first filter is connected between the first power amplifier and the second switch, the second power amplifier is connected to the first switch, the second filter is connected between the first and second switches, the third filter is connected between the first and second switches, and the fourth filter is connected between the low-noise amplifier and the second switch.

Abstract: A radio-frequency circuit includes a first filter having a first passband including a first band; a second filter having a second passband including the first band; a power amplifier that amplifies a radio-frequency signal in the first band; and a switch that switches between connection between the first filter and the power amplifier and a connection between the second filter and the power amplifier. Under a condition that a transmission of the radio-frequency signal in the first band is not V2X communication, the first filter is connected to the power amplifier via the switch. Under a condition that the transmission of the radio-frequency signal in the first band is the V2X communication, the second filter is connected to the power amplifier via the switch.

Abstract: On a module substrate, a module includes first and second filters for a first reception band, a third filter for a second reception band, and a switch that selectively connects the filters to antenna terminals. The module is configured to operate in a first mode to simultaneously transmit a signals from the first band (via the first filter but not the second filter) and the second band (via the third filter), a second mode to transmit only the first band signal (via the first filter but not the second filter), and a third mode to simultaneously transmit two first band signals (via the first and second filters, respectively). A distance between an input terminal of the first filter and the switch is shorter than a distance between an input terminal of the second filter and the switch.

Abstract: A radio frequency circuit includes: a first filter having a passband including a first frequency band that is at least one of a transmission band or a receiving band of a first Non-Terrestrial Network (NTN) band; a second filter having a passband including a second frequency band that is at least one of a transmission band or a receiving band of a second NTN band; a third filter having a passband including a third frequency band that is at least one of a transmission band or a receiving band of a first Terrestrial Network (TN) band; and a first switch that includes a first terminal connected to an antenna connection terminal, a second terminal connected to the first and second filters, and a third terminal connected to the third filter. The third frequency band at least partially overlaps a frequency gap between the first and second frequency bands.

Abstract: A radio frequency circuit includes: a first filter having a passband that includes a downlink band of a first band and a downlink band of a second band; a second filter having a passband that includes the downlink band of the first band and a downlink band of a third band; and a first switch that includes a first terminal connected to an antenna connection terminal, a second terminal connected to the first filter, and a third terminal connected to the second filter. The downlink band of the first band, the downlink band of the second band, and the downlink band of the third band at least partially overlap one another, and a combination of the first band and the second band and a combination of the first band and the third band are included in predefined band combinations for simultaneous communication.

Abstract: An acoustic wave filter includes a first series arm resonance unit in a series arm path connecting a first input/output terminal and a second input/output terminal, and a first parallel arm resonance unit between the series arm path and a ground, in which each of the first series arm resonance unit and the first parallel arm resonance unit includes an acoustic wave resonator, a first resonant frequency of the first series arm resonance unit and a second resonant frequency of the first parallel arm resonance unit are equal to or lower than a low frequency end of a pass band of the acoustic wave filter, a first anti-resonant frequency of the first series arm resonance unit and a second anti-resonant frequency of the first parallel arm resonance unit are equal to or higher than a high frequency end of the pass band.

Abstract: A composite filter component includes a filter causing a signal of a band AL reception band to pass through, a filter causing a signal of a band BL reception band to pass through, a filter causing a signal of a band AM reception band configured to be simultaneously received with a signal of the band AL to pass through, a filter causing a signal of a band BM reception band configured to be simultaneously received with a signal of the band BL to pass through.

Abstract: A radio frequency circuit includes: a first filter having a passband that includes a transmission band of a first band to which power classes are applicable; a second filter having a passband that includes the transmission band of the first band; a first combiner that includes a first input terminal, a second input terminal, and an output terminal; and a first switch that includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal. The output terminal of the first combiner is connected to an antenna connection terminal.

Abstract: A radio-frequency module includes a first power amplifier, a second power amplifier, a switch, a plurality of first filters, and a second filter. The first power amplifier amplifies a transmission signal of a first frequency band and outputs the amplified transmission signal. The second power amplifier amplifies a transmission signal of a second frequency band and outputs the amplified transmission signal. The pass bands of the plurality of first filters are contained within the first frequency band. The pass band of the second filter is contained within the second frequency band. The second power amplifier has a greater output power level than the first power amplifier. The first output terminal of the first power amplifier is switchably connectable to the plurality of first filters via the switch. The second output terminal of the second power amplifier is connected to the second filter without the switch interposed therebetween.

Abstract: A radio-frequency module includes a first power amplifier, a second power amplifier, a switch, a plurality of first filters, and a second filter. The first power amplifier amplifies a transmission signal of a first frequency band and outputs the amplified transmission signal. The second power amplifier amplifies a transmission signal of a second frequency band and outputs the amplified transmission signal. The pass bands of the plurality of first filters are contained within the first frequency band. The pass band of the second filter is contained within the second frequency band. The second power amplifier has a greater output power level than the first power amplifier. The first output terminal of the first power amplifier is switchably connectable to the plurality of first filters via the switch. The second output terminal of the second power amplifier is connected to the second filter without the switch interposed therebetween.

Abstract: A radio-frequency circuit includes first and second transfer circuits. The first transfer circuit supports reception of a cellular communication system and a satellite system. The second transfer circuit supports transmission and reception of the cellular communication system. The first transfer circuit includes a first filter circuit and a first low-noise amplifier circuit. The first filter circuit is connected to a first antenna connection terminal and has a pass band including a cellular receive band and a satellite receive band. The first low-noise amplifier circuit is connected to the first filter circuit. The second transfer circuit includes a second filter circuit, a power amplifier circuit, and a second low-noise amplifier circuit. The second filter circuit is connected to a second antenna connection terminal and has a pass band including the cellular receive band and a cellular transmit band corresponding to the cellular receive band.

Abstract: A radio-frequency module includes a module substrate having first and second major surfaces, a transmit filter disposed at the module substrate, a duplexer that is disposed at the module substrate and that includes a transmit filter and a receive filter, an antenna switch to selectively couple the transmit filter or the duplexer, and a switch to selectively couple the transmit filter or the transmit filter. The transmit filter has a pass band that includes an uplink operating band of a first band for frequency division duplex. The transmit filter has a pass band that includes the uplink operating band of the first band. The receive filter has a pass band that includes a downlink operating band of the first band. The transmit filter and the receive filter are stacked together and positioned beside the first major surface.

Abstract: A radio-frequency module includes a mounting substrate, a first power amplifier, a second power amplifier, a circuit component (IC chip), and an external connection terminal. The mounting substrate has a first main surface and a second main surface on opposite sides of the mounting substrate. The first power amplifier is mounted on the first main surface of the mounting substrate. The second power amplifier is mounted on the first main surface of the mounting substrate. The circuit component is mounted on the second main surface of the mounting substrate. The external connection terminal is disposed on the second main surface of the mounting substrate. The external connection terminal is connected to a power supply that supplies a power supply voltage to the first power amplifier and the second power amplifier.

Abstract: A module includes: a first substrate having a first surface and a second surface facing opposite sides; and a second substrate having a third surface and a fourth surface facing opposite sides, wherein the second substrate is disposed to overlap the first substrate with the third surface facing the first substrate, while being spaced apart from the first substrate on the second surface side of the first substrate, the first substrate and the second substrate are electrically connected, an inductor is mounted on the third surface, and at least one shield electrode is fixed to the first substrate with the shield electrode being positioned so as to cross a path of a magnetic flux, and each of the at least one shield electrode is grounded.

Abstract: A high-frequency module includes a mounting substrate, a first antenna switch, a second antenna switch, a filter (303), and a filter (307). The filter (303) and the filter (307) are respectively connected with an output terminal (204) and an output terminal (208). The second antenna switch is configured to be able to simultaneously execute connection between an input terminal and the output terminal (204) and connection between the input terminal and the output terminal (208). In plan view of the mounting substrate, a distance between an antenna terminal and the first antenna switch is shorter than a distance between the antenna terminal and the second antenna switch. A distance between the first antenna switch and the filter (303) is longer than a distance between the second antenna switch and the filter (303).