A transmission/reception circuit includes a low-noise amplifier, switches, a band-pass filter, a power amplifier, and a low-pass filter. The low-noise amplifier is connected, at its output terminal, to a terminal. The switch is connected to the input terminal. The band-pass filter is connected to the switch and to an antenna through a terminal. The power amplifier is connected to a terminal. The switch is connected to the output terminal and to the band-pass filter. The low-pass filter is connected to a terminal, and removes a frequency band higher than the frequency band of a signal that is to be transmitted. The switch is connected to the output terminal and to the low-pass filter. The switch is connected to a terminal and to the low-pass filter.

An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.

A radio frequency front end system can include a first module configured to provide multi-input multi-output (MIMO) receive operations for a first plurality of mid bands and a first plurality of high bands. The first module can be further configured to provide transmit operations for the plurality of mid bands. The first module can include a first node. The radio frequency front end system can include a second module configured to provide transmit and receive operations for a second plurality of mid bands and a second plurality of high bands. The second module can be a power amplifier integrated duplexer (PAiD) module. The second module can include a second node. The first module and the second module can be coupled by a signal path at the first node and the second node, respectively.

A radio-frequency circuit that conveys a radio-frequency signal that is of a predetermined frequency band and modulated using 256-Quadrature Amplitude Modulation (QAM). The magnitude slope, which is the ratio of (i) the change in a magnitude ratio between an input signal and an output signal to (ii) the change in the frequency of the input signal, is at least −0.1 dB/MHz and at most 0.1 dB/MHz in the predetermined frequency band.

Systems and method are described for improving electrical isolation between a transmission signal and receiver circuitry of a transceiver communicating over one or more wireless networks via one or more shared antennas. The transceiver may include isolation circuitry to facilitate isolation of the transmission signal from the receiver circuitry. However, a leakage current of the transmission signal and noise signals may appear at the receiver circuitry. Presence of the leakage current or the noise signals in the receiver circuitry may cause interference with the reception signal. As such, the isolation circuitry may benefit from additional isolation between the transmission signal and the receiver circuitry to reduce an effect of the leakage current and the noise signals on the reception signal.

Embodiments herein describe adapting a PIM model to compensate for changing PIM interference. A PIM model can include circuitry that generates a PIM compensation value that compensates for (i.e., mitigates or subtracts) PIM interference caused by transmitting two or more transmitter (TX) carriers in the same path. The disclosed adaptive scheme generates updated coefficients for the PIM model which are calculated after the RX signal has been removed from the RX channel. In this manner, as the PIM interference changes due to environmental conditions (e.g., temperature at the base station), the adaptive scheme can update the PIM model to generate a PIM compensation value that cancels the PIM interference.

An apparatus comprising: first radio frequency receiver circuitry configured for operation at least in one or more first radio frequency bands; at least a first antenna arrangement configured for operation in the one or more first radio frequency bands; at least a second antenna arrangement configured for operation in one or more second radio frequency bands; a frequency down-converter for converting a frequency of a signal received via the second antenna arrangement, in one or more second radio frequency bands, to the one or more first radio frequency bands; a radio frequency path to the first radio frequency receiver circuitry that is configured for transferring the signal received via the second antenna arrangement after down-conversion to the one or more first radio frequency bands and for transferring a signal received via the first antenna arrangement in the one or more first radio frequency bands.

The present disclosure relates to a transmitting/receiving device with mobile radio functionality for a motor vehicle, wherein the transmitting/receiving device includes components of: an antenna structure, a high frequency front-end unit coupled to the antenna structure and a computation unit coupled to the high frequency front-end unit. According to the present disclosure, the transmitting/receiving device is configured to additionally process a radar signal using one or more components, wherein the radar signal has a frequency (f2) that differs by less than a factor of five from a mid-frequency (f1) of the electromagnetic waves forming the corresponding mobile radio signal.

A radio-frequency circuit is used in simultaneous transfer of a radio-frequency signal of 4G and a radio-frequency signal of 5G, and includes a first transfer circuit that selectively receives the 4G radio-frequency signal or the 5G radio-frequency signal, and transfers a radio-frequency signal of a first communication band including a first transmission band and a first reception band and a radio-frequency signal of a second communication band including a second transmission band and a second reception band. The first and second transmission bands at least partially overlap. The first transfer circuit includes a first power amplifier that amplifies transmission signals of the first and second communication bands, and a first transmission filter that has a first passband including the first and second transmission bands, and passes the transmission signals of the first and second communication bands output from the first power amplifier.

Embodiments relate to radio-frequency front-end configurations having a shared amplifier network. The front-end configuration includes a first signal path configured to provide a first radio-frequency signal, a second signal path configured to provide a second radio-frequency signal, and a shared amplifier network that forms at least part of the first signal path and the second signal path. The shared amplifier network comprises a low noise amplifier configured to amplify received first or second radio-frequency signals and a power amplifier configured to amplify first or second radio-frequency signals for transmitting by an antenna. Related radio-frequency modules, wireless devices and methods for simultaneously transmitting and receiving a first radio-frequency signal and a second radio-frequency signal are also provided.