Abstract:
An apparatus is disclosed for transmission setting selection. In an example aspect, an apparatus includes a wireless interface device with a communication processor and a radio-frequency front-end. The communication processor is configured to provide a signal. The radio-frequency front-end is coupled to the communication processor and configured to accept the signal. The radio-frequency front-end includes an amplifier configured to amplify the signal based on one or more amplifier settings. The wireless interface device is configured to adjust the one or more amplifier settings responsive to an output power being changed with a gain being unchanged.
Abstract:
Certain aspects of the present disclosure are directed to a radio frequency digital-to-analog converter (RFDAC). The RFDAC generally includes a plurality of digital-to-analog (DAC) unit cells. At least one DAC unit cell is capable of being configured in an active state or in a sleep state. For the at least one DAC unit cell, an output impedance of the DAC unit cell in the active state is equal to an output impedance of the DAC unit cell in the sleep state.
Abstract:
An antenna system includes: a ground conductor; a substrate; a pair of planar dipole conductors disposed such that at least a portion of the substrate is disposed between the ground conductor and the pair of dipole conductors; a pair of energy couplers each electrically connected to a respective one of the pair of dipole conductors; and a pair of isolated lobes including electrically-conductive material. The pair of isolated lobes are electrically separate from the pair of dipole conductors and the pair of energy couplers, and disposed between the pair of dipole conductors and the ground conductor.
Abstract:
Techniques for simultaneously receiving multiple transmitted signals with independent gain control are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, etc.) includes a low noise amplifier (LNA) and first and second receive circuits. The LNA amplifies a receiver input signal and provides (i) a first amplified signal for a first set of at least one transmitted signal being received and (ii) a second amplified signal for a second set of at least one transmitted signal being received. The first receive circuit scales the first amplified signal based on a first adjustable gain selected for the first set of transmitted signal(s). The second receive circuit scales the second amplified signal based on a second adjustable gain selected for the second set of transmitted signal(s). The first and second adjustable gains may be independently selected, e.g., based on the received powers of the transmitted signals.
Abstract:
Various aspects of the present disclosure provide an apparatus for wireless communication. The apparatus may include an integrated circuit, an antenna, and a module located adjacent to the antenna. The module may include at least one of a power amplifier or a low-noise amplifier. The power amplifier may be configured to amplify a signal received from the integrated circuit for transmission by the antenna. The low-noise amplifier may be configured to amplify a signal received from the antenna for reception by the integrated circuit. The module may be separate from the integrated circuit. A length of a feed line connecting the antenna and the module may be less than a length of a feed line connecting the module and the integrated circuit. The module may also include a switching mechanism configured to switch operation of the module between transmission and reception.
Abstract:
The systems and method described herein provide efficient wireless communication in a millimeter wave (MMW) phased array system. The system may comprise a plurality of antenna elements, each of the plurality of antenna elements coupled to a transceiver and transceiver having at least one power amplifier. The system may further comprise a gain controller configured to enable or disable the transceivers in response to a power detector output indicating that one or more antenna elements are blocked. Disabling certain transceivers of blocked antenna elements enables the power amplifiers associated with the unblocked antenna elements to continue to operate at maximum efficiency.
Abstract:
Techniques for providing a jammer-resistant noise-cancelling receiver front end with band-pass impedance matching and good power efficiency. In an aspect, the center frequency of the band-pass impedance matching advantageously tracks the local oscillator frequency. In an aspect, first and second receive signal paths are provided, with an R-C network coupled to the output of the second receive signal path. The resistance of the R-C network may be selected to provide band-pass impedance matching to the RF input signal. The current outputs of the first and second signal paths are combined using a trans-impedance amplifier (TIA). In an aspect, the TIA may be implemented using a dual input transconductor amplifier to further optimize the noise performance and power efficiency features of the disclosure.
Abstract:
A method for Tx interference cancellation and power detection in a wireless device is described. A portion of a Tx output signal is down-converted to generate a feedback signal. A reconstructed interference signal and a weight are generated based on the feedback signal. A Tx power level is detected based on the weight. The reconstructed interference signal is subtracted from the Tx output signal.
Abstract:
The present disclosure provides an amplifier circuit that includes one or more amplifier stages, each of the one or more amplifier stages including a complementary transistor configuration. The complementary transistor configuration includes an NMOS transistor and a PMOS transistor. The NMOS transistor is electrically coupled in parallel to the PMOS transistor. The amplifier circuit further includes an output amplifier stage electrically coupled to an output of the one or more amplifier stages, the output amplifier stage including a non-complementary transistor configuration including one or more NMOS transistors or PMOS transistors.
Abstract:
In conventional packaging strategies for mm wave applications, the size of the package is dictated by the antenna size, which is often much larger than the RFIC (radio frequency integrated circuit). Also, the operations are often limited to a single frequency which limits their utility. In addition, multiple addition build-up layers are required to provide the necessary separation between the antennas and ground layers. To address these issues, it is proposed to provide a device that includes an antenna package, an RFIC package, and an interconnect assembly between the antenna and the RFIC packages. The interconnect assembly may comprise a plurality of interconnects with high aspect ratios and configured to connect one or more antennas of the antenna package with an RFIC of the RFIC package. An air gap may be formed in between the antenna package and the RFIC package for performance improvement.