A device comprises a digital ramp generator, an oscillator, a power amplifier, a low-noise amplifier (LNA), a mixer, and an intermediate frequency amplifier (IFA). The oscillator generates a chirp signal based on an output from the digital ramp generator. The power amplifier receives the chirp signal and outputs an amplified chirp signal to a transmitter antenna. The LNA receives a reflected chirp signal from a receiver antenna. The mixer receives output of the LNA and combines it with the chirp signal from the oscillator. The IFA receives the mixer output signal and includes a configurable high-pass filter, which has a first cutoff frequency during a first portion of the chirp signal and a second cutoff frequency during a second portion of the chirp signal. In some implementations, the first cutoff frequency is chosen based on a frequency of a blocker signal introduced by couplings between the transmitter and receiver antennas.

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.

In some implementations, a satellite gateway includes a set of modulators comprising (i) a first modulator to modulate signals for transmission using a first of multiple polarizations, and (ii) a second modulator to modulate signals for transmission using a second of the multiple polarizations. The satellite gateway includes a set of upconverters comprising at least one upconverter for each of the multiple polarizations, wherein each of the upconverters is configured to generate a radiofrequency output by concurrently upconverting multiple intermediate frequency inputs to different frequency ranges. The satellite gateway includes an intermediate frequency distribution network configured to distribute the multiple intermediate frequency output signals from each of the modulators to the inputs of the upconverters. The satellite gateway includes a set of radiofrequency switches that are operable to selectively provide the radiofrequency outputs of the upconverters to antenna feeds for the multiple polarizations.

In an embodiment, an electronic device may include a first frequency synthesizing circuit outputting a second electronic signal from a first electronic signal, a second frequency synthesizing circuit outputting a fourth electronic signal for converting a frequency of a third electronic signal obtained from the first electronic signal based on the second electronic signal, and a communication processor. The communication processor may be configured to transmit, to the first frequency synthesizing circuit, a first parameter indicating a frequency of the second electronic signal, and changing based on a first preset frequency interval according to a first preset period. The communication processor may be configured to transmit, to the second frequency synthesizing circuit, a second parameter indicating a frequency of the fourth electronic signal based on a frequency of a second clock signal, and changing based on a second preset frequency interval different from the first preset frequency interval.

Mobile devices with a merged Frequency Range 1 (FR1) and intermediate frequency (IF) path for frequency range 2 (FR2) are disclosed. In certain embodiments, a mobile device includes a transceiver including a shared transmit channel that generates an FR1 transmit signal and an IF transmit signal. The mobile device further includes a first antenna and an FR1 front end system coupled to the transceiver and operable to transmit the FR1 transmit signal on the first antenna. The mobile device further includes a second antenna and an FR2 front end system coupled to the transceiver and operable to upconvert the IF transmit signal to generate an FR2 transmit signal, and to transmit the FR2 transmit signal on the second antenna.

In some examples, a system includes at least two antennas configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a set of splitters configured to generate separate signals in the first, second, and third frequency bands. The system further includes a set of combiners, wherein each combiner of the set of combiners is configured to combine two or more of the separate signals. The system includes a set of mixers configured to down-convert the combined signals and at least one analog-to-digital converter configured to sample the down-converted signals. The system also includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.

In an example, a method includes: in a first mode, causing a first tuner of an entertainment system to receive and process a first RF signal from a first antenna configured for a first band to output a first audio signal of a first radio station and causing a second tuner of the entertainment system to receive a second RF signal from a second antenna configured for the first band to determine signal quality metrics for one or more radio stations of the first band; in a second mode, causing the first tuner to output a first signal representation of the first RF signal and causing the second tuner to receive and process the second RF signal to output a second signal representation of the second RF signal; and causing a phase diversity combining circuit to process the first and second signal representations to output an audio signal of the first radio station, without disruption of output from the entertainment system of a broadcast of the first radio station.

Various embodiments implement apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals. More particularly, some embodiments are directed toward down conversion of RF signals to IF signals in a multi-band radio receiver, such as a satellite receiver, using a single oscillator for different frequency bands. For example, some of the apparatuses and methods presented are suitable for integration into monolithic RF integrated circuits in low-cost satellite receivers for home entertainment use.

Mobile devices with dual conversion of multiple frequency bands using a shared intermediate frequency are provided. In certain embodiments, a mobile device includes a frequency range two (FR2) front end system configured to upconvert a first intermediate frequency (IF) transmit signal to generate a first radio frequency (RF) transmit signal of a first frequency band in FR2 of 5G, and to upconvert a second IF transmit signal to generate a second RF transmit signal of a second frequency band in FR2. The mobile device further includes a transceiver configured to generate the first IF transmit signal and the second IF transmit signal on a common intermediate frequency.

A system for enhanced linearity mixing includes an input-source signal coupler; a local oscillator (LO) signal coupler; a primary mixer that combines, via heterodyning, the primary-mixer-input signal and the primary-mixer-LO signal to generate a primary-mixer-output signal; a distortion-source mixer that combines, via heterodyning, the distortion-mixer-input signal and the distortion-mixer-LO signal to generate a distortion-mixer-output signal; and an output signal coupler that combines the primary-mixer-output signal and the distortion-mixer-output signal to generate an output signal with reduced non-linearity.