A radio frequency module includes: a first low-noise amplifier including a first amplification element as an input stage and a second amplification element as an output stage; a second low-noise amplifier including a third amplification element as an input stage and the second amplification element as an output stage, the third amplification element being different from the first amplification element; a first matching circuit connected to an input terminal of the first low-noise amplifier; and a module substrate including a first principal surface and a second principal surface opposite to each other, wherein the first amplification element is disposed on one of the first principal surface and the second principal surface, and the first matching circuit is disposed on the other of the first principal surface and the second principal surface.

An architecture can include a first group of filters each configured to support a band such that a first frequency range covers the respective bands, and a second group of one or more filters each configured to support a band such that a second frequency range covers the respective one or more bands. Each filter of the first group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the second group, and each filter of the second group can be configured to provide an impedance at or near a short circuit impedance for a signal in each band of the first group. The filters of the first and second groups can be implemented as one or more multiplexers. The architecture can further include a coupling circuit having a common node and configured to couple the common node to the one or more multiplexers through a first path and a second path. The coupling circuit can be further configured such that the impedance provided by each filter of the first group for the signal in each band of the second group results in the signal being sufficiently excluded from the first path, and such that the impedance provided by each filter of the second group for the signal in each band of the first group results in the signal being sufficiently excluded from the second path.

A radio-frequency circuit is capable of simultaneously transmitting a radio-frequency signal of a middle high band group (MHB) including B1 and B3, and a radio-frequency signal of a ultra-high band group (UHB) including n77, and includes: a first transfer circuit that transfers the MHB radio-frequency signal and a radio-frequency signal of a low band group (LB); and a second transfer circuit that transfers the UHB radio-frequency signal. The first transfer circuit includes: a power amplifier for B1 signals; a diplexer that demultiplexes and/or multiplexes the MHB radio-frequency signal and the LB radio-frequency signal; a transmission filter that is connected to the power amplifier and has, as a passband, a transmission band of B1; and a band-elimination filter that is disposed between the diplexer and the transmission filter, and has, as an attenuation band, a transmission band of n77. The second transfer circuit includes a power amplifier for n77 signals.

Systems and methods are provided herein that include an improved RF switch assembly. In at least one embodiment, the RF switch assembly may have an optimized topology including a common node shared by each signal path, reducing the size and cost of the RF switch assembly and providing improved performance.

A radio-frequency PA Mid device has a transmitting port and a plurality of antenna ports, and includes: a power amplifier having an input terminal connected to the transmitting port to perform a power amplification processing on a received radio-frequency signal; a first filtering unit connected to an output terminal of the power amplifier to perform a filtering processing on the received radio-frequency signal; and a multi-channel selection switch including at least one first terminal and a plurality of second terminals. One first terminal is connected to the first filtering unit, and the second terminals are connected to the antenna ports in a one-to-one correspondence to selectively switch on a transmitting path between the transmitting port and any one of the plurality of antenna ports, for transmitting the radio-frequency signal and supporting a function of polling transmission of a Sounding Reference Signal among the plurality of antenna ports.

A wireless modem device. The device includes a plurality of transceivers, a plurality of antenna ports, a plurality of RF multiplexers, and a plurality of switches. Each transceiver is configured to process a radio frequency (RF) signal in a specific frequency band. Each antenna port is coupled to one of a plurality of antennas. Each RF multiplexer is configured to split an RF signal received via a common port of the RF multiplexer to one of frequency-specific ports of the RF multiplexer based on a frequency band of the RF signal and combine RF signals received via the frequency-specific ports into the common port, wherein the common port of each RF multiplexer is coupled to one of the antenna ports. Each switch is configurable by software to couple one of the transceivers to one of the antenna ports.

An electronic device may include wireless circuitry with one or more antennas that transmit radio-frequency signals and that receive corresponding reflected signals. The wireless circuitry may detect a range to an external object based on the transmitted and received signals. The wireless circuitry may include a receive path having a mixer, an analog-to-digital converter (ADC), and a filter between the mixer and the ADC. The receive path may include a bypass path with a switch coupled around the filter. The wireless circuitry may detect the range to the external object within an ultra-short range (USR) domain when the switch is closed, thereby bypassing the filter in the receive path. The wireless circuitry may detect the range to the external object within a far-field domain when the switch is open. The filter may filter the reflected signals to remove undesired leakage and maximize dynamic range.

Devices, systems and method for enabling radio communications between a plurality of users are disclosed herein. In an embodiment, a mobile tactical device includes a radio connection interface, a first frequency converter, a frequency filter, and a second frequency converter. The radio connection interface is configured to receive a first radio communication having a mobile frequency from a mobile radio. The first frequency converter is configured to convert the mobile frequency to an intermediate frequency. The frequency filter is configured to pass or reject the intermediate frequency. The second frequency converter is configured to convert the intermediate frequency to an assigned transmission frequency for transmission of the first communication when the intermediate frequency passes the at least one frequency filter.

Embodiments of the present disclosure are directed to an antenna system and a mobile terminal. The antenna system includes a metal antenna, a radio frequency module, and an antenna tuning switch. The mobile terminal includes the antenna system mentioned above. An embodiment of the present disclosure is capable of improving the stability of sensor detection and prevent the whole machine from being in a state of power reduction for a long time, resulting in signal deterioration.

According to various embodiment, an electronic device may include at least one communication processor, an RFIC, a power amplifier, and at least one modulator configured to provide the power amplifier with a supply voltage set for a first unit of time in a first mode or in a second unit of time shorter than the first unit of time in a second mode. The at least one communication processor may be configured to control the at least one modulator to provide the supply voltage according to the second mode and to switch from the second mode to the first mode when a variation in a voltage associated with a first element for providing the supply voltage is greater than or equal to a threshold magnitude while the supply voltage is provided to the power amplifier according to the second mode. Other various embodiments are possible as well.