Abstract: In various aspects, a device-to-device communication system is provided including a first device and a second device. Each of the first device and the second device includes an antenna, a radio frequency frond-end circuit, and a baseband circuit. Each of the first device and the second device are at least one of a chiplet or a package. The device-to-device communication system further includes a cover structure housing the first device and the second device. Each of the first device and the second device are at least one of a chiplet or a package. The device-to-device communication system further includes a radio frequency signal interface wirelessly communicatively coupling the first device and the second device. The radio frequency signal interface includes the first antenna and the second antenna.

Abstract: For example, an apparatus may include a Printed Circuit Board (PCB) including a Ball Grid Array (BGA) on a first side of the PCB, the BGA configured to connect a Surface Mounted Device (SMD) to the PCB; an antenna disposed on a second side of the PCB opposite to the first side, the antenna to communicate a Radio Frequency (RF) signal of the SMD; and an RF transition to transit the RF signal between the BGA and the antenna, the RF transition including a plurality of signal buried-vias; a first plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and a ball of the BGA, the first plurality of microvias are rotationally misaligned with respect to the plurality of signal buried-vias; and a second plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and the antenna.

Abstract: For example, a radar apparatus may include a processor configured to generate radar information based on input radar data, the input radar data based on radar signals of a Multiple-Input-Multiple-Output (MIMO) radar antenna, wherein the processor is configured to generate the radar information by calibrating an antenna Mismatch (MM) of the MIMO radar antenna in a first dimension of an Azimuth-Elevation domain according to a plurality of one-dimensional (1D) Inverse Coupling Matrices (ICMs), the plurality of 1D ICMs corresponding to a plurality of antenna sub-arrays of the MIMO radar antenna and to a plurality of angles in a second dimension of the Azimuth-Elevation domain.

Abstract: Devices and methods for testing microelectronic assemblies including wireless communications are disclosed herein. For example, in some embodiments, a wireless testing system may include a radio frequency (RF) shielded chamber; a device under test (DUT) in the RF shielded chamber, wherein the DUT includes an array of first antenna elements; a testing apparatus in the RF shielded chamber including an array of second antenna elements at a first surface of a substrate to receive a test signal from the DUT, wherein a distance between individual second antenna elements and an adjacent second antenna element is at least half of a wavelength of the test signal, and wherein a distance between the first antenna elements and the second antenna elements is within a near-field region; and an array of electrical switches, wherein an individual electrical switch is coupled to a respective individual second antenna element.

Abstract: For example, an apparatus may include a Printed Circuit Board (PCB) including a Ball Grid Array (BGA) on a first side of the PCB, the BGA configured to connect a Surface Mounted Device (SMD) to the PCB; an antenna disposed on a second side of the PCB opposite to the first side, the antenna to communicate a Radio Frequency (RF) signal of the SMD; and an RF transition to transit the RF signal between the BGA and the antenna, the RF transition including a plurality of signal buried-vias; a first plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and a ball of the BGA, the first plurality of microvias are rotationally misaligned with respect to the plurality of signal buried-vias; and a second plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and the antenna.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to improve Doppler velocity estimation. An example apparatus is disclosed including a transmitter to transmit a first sweep signal at a first position in a first block of time during a transmit time sequence pattern, and transmit a second sweep signal at a second position in a second block of time during the transmit time sequence pattern, the second position different than the first position. The example apparatus also includes a velocity analyzer to determine a velocity and a direction of arrival of a target object identified during the transmit time sequence pattern.

Abstract: Some demonstrative aspects include radar apparatuses, devices, systems and methods. In one example, an apparatus may include a plurality of Transmit (Tx) antennas to transmit radar Tx signals, and a plurality of Receive (Rx) antennas to receive radar Rx signals. For example, the radar Rx signals may be based on the radar Tx signals. The apparatus may be implemented, for example, as part of a radar device, for example, as part of a vehicle including the radar device. In other aspects, the apparatus may include any other additional or alternative elements and/or may be implemented as part of any other device.

Abstract: For example, a MIMO radar may include a plurality of Tx chains to process a plurality of digital Tx signals for transmission of a plurality of Tx RF signals; a plurality of Rx chains configured to output a plurality of digital Rx signals based on a plurality of Rx RF signals and a plurality of digital leakage-cancellation signals, wherein an Rx chain of the plurality of Rx chains is configured to output a digital Rx signal based on an Rx RF signal and a digital leakage-cancellation signal corresponding to the Rx chain; and a digital MIMO filter to generate the plurality of digital leakage-cancellation signals based on the plurality of digital Tx signals, the digital MIMO filter configured to generate the digital leakage-cancellation signal corresponding to the Rx chain by applying to the plurality of digital Tx signals a respective plurality of filters corresponding to the Rx chain.

Abstract: A radar device may include a digital to analog converter (DAC) stage. The DAC stage may generate a plurality of analog signals. The DAC stage may generate a different analog signal for each transmitter chain of a plurality of transmitter chains. Each analog signal of the plurality of analog signals may represent a single digital signal. Each transmitter chain of the plurality of transmitter chains may include a transmit chain portion and switched analog beamforming network (BFN). The transmit chain portion may generate a plurality of intermediate analog signals representative of the corresponding analog signal. The switched analog BFN may generate a plurality of analog transmit signals for an intermediate analog signal of the plurality of intermediate analog signals. The plurality of analog transmit signals may include a beam formed in accordance with a state of the switched analog BFN.

Abstract: For example, a system may include a radome to be attached to a vehicle bumper fascia; an antenna array on a Printed Circuit Board (PCB), the antenna array is between the PCB and the radome, the antenna array comprising a Transmit (Tx) antenna configured to transmit Tx radar signals via the radome and the vehicle bumper fascia, and a receive (Rx) antenna configured to receive Rx radar signals based on the Tx radar signals; and an absorbing spacer in a spacer area between the PCB and the radome, the spacer area separating the Tx antenna from the Rx antenna, the absorbing spacer configured to absorb reflected signals formed by reflection of the Tx radar signals from the vehicle bumper fascia.

Abstract: For example, a radar antenna may include a Transmit (Tx) antenna array configured to transmit a plurality of Tx radar signals; and a Receive (Rx) antenna array configured to receive a plurality of Rx radar signals based on the plurality of Tx radar signals, the Rx antenna array is orthogonal to the Tx antenna array, wherein a first array of the Tx antenna array or the Rx antenna array includes a first sub-array and a second sub-array parallel to the first sub-array, wherein a sub-array spacing between the first sub-array and the second sub-array is shorter than a length of a second array of the Tx antenna array or the Rx antenna array.

Abstract: Devices and methods for testing microelectronic assemblies including wireless communications are disclosed herein. For example, in some embodiments, a wireless testing system may include a radio frequency (RF) shielded chamber; a device under test (DUT) in the RF shielded chamber, wherein the DUT includes an array of first antenna elements; a testing apparatus in the RF shielded chamber including an array of second antenna elements at a first surface of a substrate to receive a test signal from the DUT, wherein a distance between individual second antenna elements and an adjacent second antenna element is at least half of a wavelength of the test signal, and wherein a distance between the first antenna elements and the second antenna elements is within a near-field region; and an array of electrical switches, wherein an individual electrical switch is coupled to a respective individual second antenna element.

Abstract: For example, a MIMO radar may include a plurality of Tx chains to process a plurality of digital Tx signals for transmission of a plurality of Tx RF signals; a plurality of Rx chains configured to output a plurality of digital Rx signals based on a plurality of Rx RF signals and a plurality of digital leakage-cancellation signals, wherein an Rx chain of the plurality of Rx chains is configured to output a digital Rx signal based on an Rx RF signal and a digital leakage-cancellation signal corresponding to the Rx chain; and a digital MIMO filter to generate the plurality of digital leakage-cancellation signals based on the plurality of digital Tx signals, the digital MIMO filter configured to generate the digital leakage-cancellation signal corresponding to the Rx chain by applying to the plurality of digital Tx signals a respective plurality of filters corresponding to the Rx chain.

Abstract: For example, an apparatus may include a Printed Circuit Board (PCB) including a Ball Grid Array (BGA) on a first side of the PCB, the BGA configured to connect a Surface Mounted Device (SMD) to the PCB; an antenna disposed on a second side of the PCB opposite to the first side, the antenna to communicate a Radio Frequency (RF) signal of the SMD; and an RF transition to transit the RF signal between the BGA and the antenna, the RF transition including a plurality of signal buried-vias; a first plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and a ball of the BGA, the first plurality of microvias are rotationally misaligned with respect to the plurality of signal buried-vias; and a second plurality of microvias configured to transit the RF signal between the plurality of signal buried-vias and the antenna.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to improve Doppler velocity estimation. An example apparatus is disclosed including a transmitter to transmit a first sweep signal at a first position in a first block of time during a transmit time sequence pattern, and transmit a second sweep signal at a second position in a second block of time during the transmit time sequence pattern, the second position different than the first position. The example apparatus also includes a velocity analyzer to determine a velocity and a direction of arrival of a target object identified during the transmit time sequence pattern.

Abstract: A multilayer package and wireless communication device for high frequency communications, for example large-scale millimeter (mmWave) phased arrays having wide scanning range, wide bandwidth, and high efficiency. The multilayer package comprises a plurality of patch antennas disposed on a first substrate, a plurality of slotted patch antennas disposed on a third substrate, the first substrate and the third substrate being disposed on opposing sides of a second substrate, a plurality of antenna feeds disposed on a fourth substrate, the fourth substrate being disposed adjacent to the third substrate, a plurality of dipoles disposed on the first substrate, the second substrate, the third substrate, and the fourth substrate, and an impedance transformer, disposed within one or more additional substrates. The wireless communication device can include the multilayer package and an integrated circuit, wherein each of the plurality of antenna feeds is coupled to the integrated circuit by the impedance transformer.

Abstract: A radar system and method with reduced multipath effects include a first component of a radar sensor module on which at least one antenna element is formed, the at least one antenna element having a surface at which radar radiation is received or transmitted, the at least one antenna element having a radiation aperture. A second component in proximity to the antenna element such that a portion of the radar radiation impinges on the second component comprises an angled surface forming an angle with the surface of the antenna element. The angled surface of the second component comprises a texture such that when the portion of the radiation impinges on the angled surface, the amount of multipath signal propagating through the radiation aperture of the antenna element is reduced.

Abstract: A transceiver includes a vector modulator and a phased array antenna including a plurality of quad polarization antenna cells. The vector modulator is configured to modify an information signal to generate two excitation signals based on a selected polarization. The polarization is selected as one of at least vertical, horizontal, right hand circular, and left hand circular. The vector modulator is configured to drive at least one of the quad polarization antenna cells with the two excitation signals to achieve the selected polarity.

Abstract: A transceiver includes a vector modulator and a phased array antenna including a plurality of quad polarization antenna cells. The vector modulator is configured to modify an information signal to generate two excitation signals based on a selected polarization. The polarization is selected as one of at least vertical, horizontal, right hand circular, and left hand circular. The vector modulator is configured to drive at least one of the quad polarization antenna cells with the two excitation signals to achieve the selected polarity.

Abstract: A radar system and method with reduced multipath effects include a first component of a radar sensor module on which at least one antenna element is formed, the at least one antenna element having a surface at which radar radiation is received or transmitted, the at least one antenna element having a radiation aperture. A second component in proximity to the antenna element such that a portion of the radar radiation impinges on the second component comprises an angled surface forming an angle with the surface of the antenna element. The angled surface of the second component comprises a texture such that when the portion of the radiation impinges on the angled surface, the amount of multipath signal propagating through the radiation aperture of the antenna element is reduced.