The present invention discloses a millimeter-wave isolation device, comprising a first isolated circuit and a second isolated circuit and further comprising a millimeter-wave transceiver. An output end of the first isolated circuit is connected to an input end of the millimeter-wave transceiver. An output end of the millimeter-wave transceiver is connected to an input end of the second isolated circuit. The first isolated circuit and the second isolated circuit are isolated by virtue of the millimeter-wave transceiver. By adopting a short distance transmission mode with millimeter-waves taken as carrier waves, a bandwidth can reach 200 kHz to 20 GHz, and a transmission speed can reach 100 kbps to 10 Gbps. The speed is high, whereby the millimeter-wave isolation device can be applicable to any scenario. A millimeter-wave carrier wave antenna is small, and through the antenna, either wireless transmission or signal isolation can be achieved.

An elastic wave device includes an LiNbO.sub.3 substrate, a first elastic wave resonator including a first IDT electrode and a first dielectric film, and a second elastic wave resonator including a second IDT electrode and a second dielectric film. A Rayleigh wave travels along at least one surface of the elastic wave device. A thickness of the first dielectric film differs from a thickness of the second dielectric film. A propagation direction of an elastic wave in the first elastic wave resonator coincides with a propagation direction of an elastic wave in the second elastic wave resonator. Euler angles of the LiNbO.sub.3 substrate fall within a range of (0°±5°, θ, 0°±10°).

A high-frequency apparatus includes a first device and a second device, and a mounting substrate on which the first and second devices are mounted. At least the second device is an acoustic wave device including a piezoelectric substrate and a functional element. The first device and the second device are adjacent to or in a vicinity of each other on the mounting substrate. A coefficient of linear expansion of a substrate of the first device is lower than a coefficient of linear expansion of the mounting substrate, and a coefficient of linear expansion of the piezoelectric substrate of the second device is higher than the coefficient of linear expansion of the mounting substrate.

Systems, methods, and apparatuses, including electronic devices and computer-readable storage media, for adaptively switching wireless connections between antennas of a wearable electronic device and a host electronic device. One device includes a wearable electronic device with a first and second housing, each housing including two or more antennas. The wearable electronic device is configured to establish and monitor a wireless cross-link between two antennas in different housings, or between antennas in one housing and antennas of a host electronic device. The wearable electronic device can monitor the integrity of the wireless cross-link, and establish an updated cross-link in response to the wireless cross-link not meeting a predetermined integrity threshold. The wearable electronic device can monitor a wireless cross-head link between housings of a wearable electronic device at the same time as a wireless cross-body link between the wearable electronic device and the host electronic device.

An electronic device may include wireless circuitry with a processor, a transceiver, an antenna, and a front-end module coupled between the transceiver and the antenna. The front-end module may include one or more power amplifiers for amplifying a signal for transmission through the antenna. A power amplifier may include a phase distortion compensation circuit. The phase distortion compensation circuit may include one or more n-type metal-oxide-semiconductor capacitors configured to receive a bias voltage. The bias voltage may be set to provide the proper amount of phase distortion compensation.

A satellite signal method includes: receiving a satellite signal at an apparatus; transmitting, from the apparatus, one or more outbound signals; and inhibiting processing, by the apparatus, of at least a first portion of the satellite signal spanning a first frequency set that includes at least a portion of an interference signal corresponding to transmission of the one or more outbound signals.

Amplitude-to-phase (AM-PM) error correction in a transceiver circuit is provided. The transceiver circuit is configured to generate a radio frequency (RF) signal from a time-variant input vector for transmission in one or more transmission frequencies. In embodiments disclosed herein, the transceiver circuit is configured to determine a phase correction term from the time-variant input vector and apply the determined phase correction term to the time-variant input vector to thereby correct an AM-PM error(s) in the RF signal. By correcting the AM-PM error(s) in the transceiver circuit, it is possible to prevent undesired amplitude distortion and/or spectrum regrowth in any of the transmission frequencies, particularly when the RF signal is modulated across a wide modulation bandwidth (e.g., ≥ 200 MHz).

Phase and amplitude error correction in a transmission circuit is provided. The transmission circuit includes a transceiver circuit, a power management integrated circuit (PMIC), and a power amplifier circuit(s). The transceiver circuit generates a radio frequency (RF) signal(s) from an input vector, the PMIC generates a modulated voltage, and the power amplifier circuit(s) amplifies the RF signal(s) based on the modulated voltage. When the power amplifier circuit(s) is coupled to an RF front-end circuit, unwanted amplitude-amplitude (AM-AM) and amplitude-phase (AM-PM) errors may be created across a modulation bandwidth of the transmission circuit. In this regard, in embodiments disclosed herein, the input vector is equalized based on multiple complex filters to thereby cause the AM-AM and AM-PM errors to be corrected in the transmission circuit. As a result, it is possible to reduce undesired instantaneous excessive compression and/or spectrum regrowth across the modulation bandwidth of the transmission circuit.

An electronic device may include: an antenna; a radio frequency integrated circuit (RFIC) configured to: generate a first radio frequency (RF) signal in a first frequency band to be used in cellular communication by mixing a first baseband signal with a first reference signal, output the first RF signal to the antenna, receive, from the antenna, a second RF signal in a second frequency band to be used in the cellular communication, generate a second baseband signal by mixing the second RF signal with a second reference signal, and output the second baseband signal; and a processor is configured to: obtain, from the second baseband signal output by the RFIC, a control signal for establishing a communication channel between a base station and the electronic device, identify, from the control signal, a first condition for causing desense of the second RF signal, and based on the first condition being satisfied, adjust a frequency of the first reference signal.

A radio-frequency module includes a module substrate. The module substrate includes a first principal surface; a second principal surface on a side of the module substrate that is opposite to the first principal surface; a third principal surface that is recessed toward the first principal surface from the second principal surface in a plan view of the second principal surface; a recessed region in which the third principal surface is a bottom surface; and a protruding region located on an outer periphery of the recessed region, in a plan view of the second principal surface, wherein the protruding region has a via conductor disposed therein, the via conductor extending in a direction perpendicular to the second principal surface and having an end exposed on the second principal surface.