A RF system and an electronic device are provided. The RF system includes an RF transceiver, an RF processing circuit, a transfer switch module, and four antennas. The RF processing circuit includes a first TX module, a second TX module, a first RX module, a second RX module, a first duplexer, a second duplexer, a first multiplexer, and a first filtering module. When the RF system works in a NSA mode, a first antenna is configured for TX of a first LB and PRX of the first LB, a second antenna is configured for TX of a second LB and PRX of the second LB, a third antenna is configured for DRX of the second LB, a fourth antenna is configured for DRX of the first LB, and the first filtering module is configured to filter a band other than the first LB.

An electronic device includes at least one hardware element, a wireless communication circuit that supports time division duplexing (TDD) communication, a plurality of antennas, a processor, and a memory storing reference strength information. The processor may be configured to identify a victim in operation in the at least one hardware element, and identify at least one first antenna operating as an aggressor against the victim in the plurality of antennas. When the at least one first antenna transmits a wireless signal, the processor may be configured to identify a ratio of uplink symbols for a specified time period, identify a first reference strength based on the ratio, identify a second reference strength based on the reference strength information, and transmit the wireless signal based on a result of comparing the first reference strength with the second reference strength.

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.

Methods and systems for automated testing of extremely-high frequency devices are disclosed. A device under test (DUT) is set in a simultaneous transmit and receive mode. The DUT receives a lower frequency radio frequency (RF) signal from a test unit and up-converts the lower frequency RF signal to a higher frequency RF signal. The DUT transmits the higher frequency RF signal using a first antenna, and receives the higher frequency RF signal using a second antenna. The DUT down-converts the received higher frequency RF signal to a received test RF signal and provides the received test RF signal to the test unit for comparing measurements derived from the received test signal to a design specification for the DUT.

In one embodiment, an integrated circuit includes: a first radio frequency (RF) circuit configured to receive and process a first RF signal having a sub-gigahertz (GHz) frequency to output a first lower frequency signal and to transmit RF signals having the sub-GHz frequency; a second RF circuit configured to receive and process a second RF signal having a frequency of at least substantially 2.4 GHz to output a second lower frequency signal and to transmit RF signals at the at least substantially 2.4 GHz; shared analog circuitry coupled to the first RF circuit and the second RF circuit, the shared analog circuitry to receive at least one of the first RF signal or the second RF signal and output a digital output signal; and a digital circuit coupled to the shared analog circuit, the digital circuit to recover message information from the digital output signal.

A transmitter comprises an antenna array demultiplexor having a first input for an output signal, a second input for a control signal, a first output coupled to a first output pin, and a second output coupled to a second output pin. The antenna array demultiplexor provides the output signal to the first or second output based on the control signal. The first and second output pins are coupled to first and second antennae, respectively. In some implementations, the transmitter includes a transformer and a capacitor coupled in parallel between the first and second output pins, and the antenna array demultiplexor comprises a first switch coupled between the first output pin and a first ground pin, and a second switch coupled between the second output pin and a second ground pin. The first switch receives a second control signal, and the second switch receives an inverse of the second control signal.

A radio receiver system and a radio transmitter system are disclosed. The radio receiver system comprises a plurality of intermediate frequency (IF) shifting channels configured to shift incoming signals having a first frequency to an intermediate frequency in a first mixing stage, and to a second frequency in a second mixing stage. The radio transmitter system comprises a plurality of IF shifting channels configured to shift outgoing signals having a first frequency to an intermediate frequency in a first mixing stage, and to a second frequency in a second mixing stage. Since each intermediate frequency is different, the signals shifted to the second frequency combine by coherent addition, and any spurious signals combine by incoherent addition.

An electronic device is provided. The electronic device includes at least one processor configured to support first network communication and second network communication, multiple antennas comprising a first antenna and a second antenna, an aperture switch connected to the first antenna or the second antenna and configured to change resonance characteristics of at least one of the first antenna and the second antenna, and a memory configured to store multiple antenna configurations for controlling a switching operation of the aperture switch. The at least one processor may be configured to identify whether the electronic device is in a state of connection to a first base station which corresponds to the first network communication, and which operates as a master node, and to a second base station which corresponds to the second network communication, and which operates as a secondary node, and identify information regarding allocation of a resource for communication.

Circuits and methods that enable stable and reliable “hot switching” from one antenna to another without turning RF power to the antennas OFF in wireless RF systems during at least some transmission events. One embodiment comprises an RF switch circuit including a common port configured to pass an RF signal, a plurality of switch arms each coupled to the common port and including an associated port, and a shunt termination impedance selectively couplable to the common port through a switch. Another embodiment comprises a method for switching an RF signal applied to a common port of a switch from a first switch arm initially in an ON state to a second switch arm initially in an OFF state, including: setting the second switch arm to the ON state, and then setting the first switch arm to the OFF state.

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.