A receiving apparatus includes at least two first radio frequency signal processors and a first analog signal processor. The at least two first radio frequency signal processors are coupled to the first analog signal processor using at least one first switch circuit. The first radio frequency signal processor is configured to obtain a radio frequency signal to obtain a first analog signal. The first analog signal processor is configured to obtain a first baseband signal based on the first analog signal.

An electronic device may comprise antenna, low-noise amplifier, radio frequency integrated circuit (RFIC), and communication. The communication processor may be configured to identify a low-noise amplifier for amplifying a first RF signal and a low-noise amplifier for amplifying a second RF signal, based on the low-noise amplifier for amplifying the first RF signal differing from the low-noise amplifier for amplifying the second RF signal, set a first gain of the low-noise amplifier for amplifying the first RF signal, set a second gain of the low-noise amplifier for amplifying the second RF signal, based on the low-noise amplifier for amplifying the first RF signal being identical to the low-noise amplifier for amplifying the second RF signal, set a third gain of a low-noise amplifier of amplifying the first RF signal and the second RF signal.

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 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.

Various pertaining to a Wi-Fi dual-band dual-concurrent (DBDC) radio frequency (RF) front-end circuit are described. A device, which is configured to facilitate wireless communications in a DBDC application and a multiple-input-multiple-output (MIMO) application, includes a front-end circuit configured to support transmission at a first frequency band and at a second frequency band. The front-end circuit includes at least two antennas, at least two diplexers, a first circuit path and a second circuit path. The first circuit path is coupled to one of the at least two antennas and is configured to transmit and receive at the first frequency band. The second circuit path is coupled to the other one of the at least two antennas and is configured to transmit and receive at the second frequency band. The first frequency band and the second frequency band are split from a Wi-Fi 5 GHz˜6 GHz band.

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.

A communication apparatus for a vehicle according to an embodiment and a control method therefor are disclosed. The communication apparatus for a vehicle comprises: an antenna unit including a first antenna and a plurality of second antennas; a first switch for switching a first path to the first antenna and a second path to each of the plurality of second antennas; a second switch for switching a second path to any one of the plurality of second antennas; a length adjustment unit that is connected to the second path to the one second antenna connected to the second switch and adjusts the resonance length of the connected second antenna; and a communication control unit that generates a switching signal for connection to any one of the plurality of second antennas according to the state of the first antenna.

A calibration system comprises an actuator circuit comprising a first delay circuit that receives a plurality of data pulses and a second delay circuit that receives the pulses, wherein one of the first and second delay circuits delays the data pulses independently of the other of the first and second delay circuits; a data switch that receives an output of the actuator circuit including delay data signals of the data pulses from the first and second delay circuits and switches and outputs a plurality of local oscillator (LO) signals for output as a controlled LO signal according to control signals of the delay data signals and applied to the data switch. At least one calibration switch receives the output of the actuator circuit and the plurality of LO+ and LO− signals, and outputs a second controlled LO signal output to a sense circuit.

Aspects of the disclosure relate to devices, wireless communication apparatuses, methods, and circuitry implementing a low noise amplifier (LNA) with phase-shifting circuitry to achieve a continuous phase at the output of the LNA. One aspect is an amplifier including a high gain active path comprising active circuitry, and a low gain path comprising passive circuitry and phase-shifting circuitry. In one or more aspects, the phase-shifting circuitry is configured to shift a phase of an input signal within the low gain path such that the phase of an output signal outputted from the low gain path approximately matches a phase of an output signal outputted from the high gain active path. In at least one aspect, a gain of the high gain active path is higher than a gain of the low gain passive path.

Systems and methods for RF hazard protection are provided. In one embodiment, a RF protection coupler comprises: a first port to couple to an output of an RF source circuit; a second port to couple to an external RF load; a source side and load side RF switches, wherein the source side RF switch and the load side RF switch are each switch between a first and second states in response to a detected matting. In the first state the source and load side RF switches establish an electrical path between the first and second ports. In the second state: the source side RF switch couples the first port to an impedance load that is impedance matched to the output of the RF source circuit; the load side RF switch couples the second port to an electrical ground; and a gap between the switches electrically isolates the ports.