Aspects of the disclosure include a die and corresponding radio-frequency module and wireless mobile device. Examples of the die include, integral to the die, a power amplifier controller, a low noise amplifier, and an antenna switch in communication with both the power amplifier controller and the low noise amplifier.

A radio frequency module includes a first terminal, a second terminal, a third terminal, a first switching circuit, a bandpass filter, a first band elimination filter, and a first wiring conductor. The first switching circuit switches between a connection between a first switch terminal and a second switch terminal and a connection between the first switch terminal and a third switch terminal. The bandpass filter is disposed on a first signal path connecting the first terminal to the first switch terminal, and has a first passband. The first band elimination filter is disposed on a second signal path connecting the second switch terminal to the second terminal, and has a first elimination band included in the first passband. The first wiring conductor forms a third signal path connecting the third switch terminal to the third terminal.

A front-end circuit includes an antenna connection terminal, a selection terminal, and a selection terminal, a switching circuit including a common terminal and selection terminals, a receive filter configured to pass a radio-frequency signal in Band B, a signal path connecting the selection terminal and the selection terminal and including the receive filter, a signal path connecting the selection terminal and the selection terminal and defining and functioning as a bypass path without any filter, and a filter coupled between the antenna connection terminal and the common terminal and configured to pass a first frequency range group including Band B.

A switch module switches among a first state where first and second frequency bands are used in parallel, a second state where only the first frequency band is used, and a third state where none of the first and second frequency bands is used, and includes first, second, and third filters and an antenna switch. In the first state, a common terminal and the first and second filters are connected and the common terminal and the third filter are not connected. In the second state, the common terminal and the first and third filters are connected, and the common terminal and the second filter are not connected.

A bridge combiner can be implemented as a coupling circuit that includes a common node and configured to couple the common node to a first group of filters through a first path and to couple the common node to a second group of one or more filters through a second path. The coupling circuit can include a resonator such that an impedance provided by each filter of the first group for a signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that an impedance provided by each filter of the second group for a signal in each band of the first group results in the signal being sufficiently excluded from the second path.

An aircraft control device and a remote controller aircraft are disclosed. The aircraft control device includes a first channel configured to receive first control information outputted by a remote controller and transmit the first control information to an aircraft; a second channel configured to receive second control information outputted by the remote controller and transmit the second control information to a camera and/or a gimbal; and a switch unit configured to switch that the first control information is received by the second channel and transmitted to the aircraft when the first channel is disturbed or a distance between the remote controller and the aircraft is larger than a distance threshold. The present invention is able to switch the transmission route of the first control information between the first channel and the second channel in accordance with situations of the first channel and the second channel.

Embodiments of this application provide a short-range communications apparatus, a chip, and a control method. The apparatus includes: a gain unit, coupled to an antenna; a first radio frequency RF receive channel, coupled to the gain unit; a first baseband processor, coupled to the first RF receive channel, and configured to receive a first signal from the antenna through the first RF receive channel; a second RF receive channel, coupled to the gain unit; and a second baseband processor, coupled to the second RF receive channel, and configured to receive a second signal from the antenna through the second RF receive channel.

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.

Technologies for provided for a radio frequency input/output (RFIO) combiner/splitter. An example combiner/splitter can include an RFIO circuit including a receive path including first and second low noise amplifiers (LNAs), first switches, resistors, and capacitors, each of the first switches being in series with a respective one of the first capacitors and first resistors; a transmit path including a first power amplifier (PA) including second switches coupled to second resistors and third switches coupled to third resistors, and a second PA including fourth switches coupled to fourth resistors and fifth switches coupled to fifth resistors, each of the second switches, the third switches, the fourth switches, and the fifth switches being in series with one or more respective ones of the second resistors, the third resistors, the fourth resistors, and the fifth resistors; and a balun that couples the Rx and Tx path to an RFIO terminal.

A switching circuit comprises a first filter, a second filter and a plurality of switches. The first filter is configured to filter a first frequency band, a second frequency band that is adjacent to the first frequency band and a gap band between the first frequency band and the second frequency band. The second filter is configured to filter the second frequency band. The plurality of switches is configured to route signals from an antenna through one of the first filter and second filter.