Abstract: Exemplary embodiments are directed to beamforming. A device may include a plurality of inputs for receiving differential in-phase and quadrature data. The device may further include a plurality of switching elements coupled to the plurality of inputs and configured to enable for rotation of the differential in-phase and quadrature data at baseband.

Abstract: A reconfigurable millimeter wave multibeam antenna array is disclosed. In an exemplary embodiment, an apparatus is provided that includes a first millimeter (MM) wave antenna, a second MM wave antenna, and a hybrid coupler coupled to the first and second MM wave antennas, the hybrid coupler configured to receive a MM wave transmit signal and a phase shifted version of the MM wave transmit signal, and to direct power to the first and second MM wave antennas based on a phase difference between the MM wave transmit signal and the phase shifted version of the MM wave transmit signal.

Abstract: A switching amplifier with an embedded harmonic rejection filter is disclosed. In an exemplary design, the switching amplifier includes a generator circuit and a plurality of output circuits. The generator circuit receives an input signal and a carrier signal at a carrier frequency and generates a plurality of versions of a drive signal associated with different delays. The drive signal may be a pulse width modulation (PWM) signal. The plurality of versions of the drive signal may be generated by delaying the carrier signal, or the input signal, or the drive signal. The output circuits receive the plurality of versions of the drive signal and provide an output signal. The output circuits have outputs that are coupled together and implement a finite impulse response (FIR) filter based on the plurality of versions of the drive signal. The FIR filter has a frequency response with zeros at harmonics of the carrier frequency.

Abstract: A driver amplifier with asymmetrical T-coil matching network is disclosed. In an exemplary embodiment, an apparatus includes a first inductor configured to receive an input signal at an input terminal and to provide an output signal at an output terminal that is matched to a resistive load. The apparatus also includes a second inductor connected to the first inductor and coupled to the first inductor by a coupling coefficient, the second inductor having a first terminal connected to a supply voltage.

Abstract: A method includes providing a first local oscillator signal having a first duty cycle to a first mixer unit and providing a second local oscillator signal having a second duty cycle to a second mixer unit. At least one of the first duty cycle or the second duty cycle is greater than fifty percent. A frequency of the first local oscillator signal approximately equals a frequency of the second local oscillator signal. The method may also include generating a modulated output signal based on an output signal of the first mixer unit and based on an output signal of the second mixer unit.

Abstract: In a particular embodiment, a method of generating in-phase (I) and quadrature-phase (Q) signals includes generating a first I output signal based on a first I input signal, a second I input signal, a first Q input signal, and a second Q input signal. The method further includes generating a second I output signal based on the first I input signal, the second I input signal, the first Q input signal, and the second Q input signal. A first Q output signal is generated based on the first I input signal, the second I input signal, the first Q input signal, and the second Q input signal. A second Q output signal is generated based on the first I input signal, the second I input signal, the first Q input signal, and the second Q input signal. According to further embodiments, an apparatus is disclosed.

Abstract: A concurrent hybrid matching network is disclosed. In an exemplary embodiment, an apparatus includes a phase shifting coupler having a first terminal connected to an antenna, a second terminal connected to a receive signal path, and third terminal connected to a transmit signal path. The apparatus also includes at least one switch to configured to enable one of the receive signal path and the transmit signal path to communicate with the antenna.

Abstract: A millimeter wave power amplifier is disclosed. In an exemplary embodiment, a MM wave power amplifier (PA) includes a plurality of amplifier stages coupled together to receive a MM wave input signal and produce an amplified MM wave output signal, and one or more feedback elements coupled across the amplifier stages, each feedback element coupled across an odd number of the amplifier stages to increase an operating bandwidth of the PA.

Abstract: A device includes a first hybrid, where a first input of the first hybrid is coupled to an output of a first amplifier configured to receive a first input signal. A first input of a second hybrid is coupled to an output of a second amplifier configured to receive a second input signal. The device includes a first phase shifter configured to receive the first input signal and a second phase shifter configured to receive the second input signal. An output of the first phase shifter is coupled to an input of a third amplifier, and an output of the third amplifier is coupled to a second input of the second hybrid. An output of the second phase shifter is coupled to an input of a fourth amplifier, and an output of the fourth amplifier is coupled to a second input of the first hybrid.

Abstract: A switching amplifier with an embedded harmonic rejection filter is disclosed. In an exemplary design, the switching amplifier includes a generator circuit and a plurality of output circuits. The generator circuit receives an input signal and a carrier signal at a carrier frequency and generates a plurality of versions of a drive signal associated with different delays. The drive signal may be a pulse width modulation (PWM) signal. The plurality of versions of the drive signal may be generated by delaying the carrier signal, or the input signal, or the drive signal. The output circuits receive the plurality of versions of the drive signal and provide an output signal. The output circuits have outputs that are coupled together and implement a finite impulse response (FIR) filter based on the plurality of versions of the drive signal. The FIR filter has a frequency response with zeros at harmonics of the carrier frequency.

Abstract: A phased array architecture configured for current reuse is disclosed. In an exemplary embodiment, an apparatus includes a current mode phase rotator (PR) module configured to generate phase shifted in-phase (I) and quadrature-phase (Q) current signals, and a current mode residual sideband (RSB) correction module configured to correct residual sideband error associated with the phase shifted I and Q current signals. The RSB correction module and the PR module form a phased array element configured to reuse a DC supply current.

Abstract: A novel Doherty amplifier with improved efficiency is disclosed. In an exemplary embodiment an apparatus includes a phase shifter configured to generate a phase shifted first millimeter (MM) wave signal based on a selected phase shift, and a hybrid plus coupler comprising output terminals and configured to adjust output power levels at the output terminals based on combinations of the phase shifted first MM wave signal and a second MM wave signal.

Abstract: Exemplary embodiments are directed to beamforming. A device may include a plurality of inputs for receiving differential in-phase and quadrature data. The device may further include a plurality of switching elements coupled to the plurality of inputs and configured to enable for rotation of the differential in-phase and quadrature data at baseband.

Abstract: Exemplary embodiments are directed to beamforming. A device may include a plurality of mixers, wherein each mixer is configured to receive at least one of a quadrature signal and an in-phase signal. The device may further include at least one RF phase rotator coupled to an output of each of the plurality of mixers and configured for rotating an envelope of the at least one of the quadrature signal and the in-phase signal to generate at least one of a rotated in-phase signal and a rotated quadrature signal.

Abstract: Exemplary embodiments are directed to a beamforming device. A device may include at least one receive path; and an amplifier coupled to an output of each receive path. The device configured to process each a signal from each receive path in at least one of a voltage domain and a current domain.

Abstract: A millimeter wave power amplifier is disclosed. In an exemplary embodiment, a MM wave power amplifier (PA) includes a plurality of amplifier stages coupled together to receive a MM wave input signal and produce an amplified MM wave output signal, and one or more feedback elements coupled across the amplifier stages, each feedback element coupled across an odd number of the amplifier stages to increase an operating bandwidth of the PA.

Abstract: A reconfigurable millimeter wave multibeam antenna array is disclosed. In an exemplary embodiment, an apparatus is provided that includes a first millimeter (MM) wave antenna, a second MM wave antenna, and a hybrid coupler coupled to the first and second MM wave antennas, the hybrid coupler configured to receive a MM wave transmit signal and a phase shifted version of the MM wave transmit signal, and to direct power to the first and second MM wave antennas based on a phase difference between the MM wave transmit signal and the phase shifted version of the MM wave transmit signal.