An antenna device includes antennas to receive and transmit signals; and a processor to divide radiation patterns of combinations of the antennas into a predetermined number of characteristic patterns, and to calculate similarities of the characteristic patterns and a RSSI of each of the characteristic patterns. When the antenna device is in operation, the processor reads and analyzes RSSI of the signals received by the antennas, compares the RSSI of the signals of the antennas with the RSSI of the characteristic patterns, and determines a matched characteristic pattern group according to results of comparisons and the similarities of the characteristic patterns.

An example system and method provides radiating into the 3D environment a millimeter wave (mmWave) radio frequency (RF) radiation signal that interacts with reflective surfaces, penetrable surfaces, scattering surfaces of the 3D environment, producing respective multipath components, determining information from two or more of the multipath components, including two among, or, optionally, all of angle of arrival (AoA), angle of departure (AoD), time of arrival, relative time of arrival (RTA), and phase and, based on the information and the received multipath components, performs computing the user device’s relative or absolute mobile device location in relation to the surrounding 3D environment, and providing images or video of the surrounding 3D environment to a display or a storage of the user’s mobile device, for displaying or storing.

Systems for shielding bent signal lines provide ways to couple different antenna arrays for radio frequency (RF) integrated circuits (ICs) (RFICs) associated therewith where the antenna arrays are oriented in different directions. Because the antenna arrays are oriented in different directions, the antenna structures containing the antennas may be arranged in different planes, and signal lines extending therebetween may include a bend. To prevent electromagnetic interference (EMI) or electromagnetic crosstalk (EMC) from negatively impacting signals on the signal lines, the signal lines may be shielded. The shields may further include vias connecting the mesh ground planes and positioned exteriorly of the signal lines. The density of the vias may be varied to provide a desired rigidity in planes containing the antenna arrays while providing a desired flexibility at a desired bending location in the signal lines to help bending process accuracy.

Systems for shielding bent signal lines provide ways to couple different antenna arrays for radio frequency (RF) integrated circuits (ICs) (RFICs) associated therewith where the antenna arrays are oriented in different directions. Because the antenna arrays are oriented in different directions, the antenna structures containing the antennas may be arranged in different planes, and signal lines extending therebetween may include a bend. To prevent electromagnetic interference (EMI) or electromagnetic crosstalk (EMC) from negatively impacting signals on the signal lines, the signal lines may be shielded. The shields may further include vias connecting the mesh ground planes and positioned exteriorly of the signal lines. The density of the vias may be varied to provide a desired rigidity in planes containing the antenna arrays while providing a desired flexibility at a desired bending location in the signal lines to help bending process accuracy.

An antenna apparatus for a radio frequency (RF) coil to transmit signals to and to receive signal from a subject in a magnetic resonance imaging (MRI) system includes a distal surface facing away from the subject, a proximal surface facing towards the subject, a high permittivity material (HPM) having a shape, and an antenna coupled to the HPM and positioned on the proximal surface such that the antenna is positioned between the HPM and the subject.

An antenna apparatus for a radio frequency (RF) coil to transmit signals to and to receive signal from a subject in a magnetic resonance imaging (MRI) system includes a distal surface facing away from the subject, a proximal surface facing towards the subject, a high permittivity material (HPM) having a shape, and an antenna coupled to the HPM and positioned on the proximal surface such that the antenna is positioned between the HPM and the subject.

A multi-step coherent combination of signals received by multiple distributed phased antenna arrays to increase the coverage area of the distributed phase antenna arrays while decreasing the loss of such antennas, particularly in sections of a service area that traditionally are not covered by such antennas. More particularly, the solution presented herein coherently combines, in a multi-step coherent combination process, two or more data streams from two or more Phased Array Antenna Modules (PAAMs) to generate output data for the corresponding wireless device. In so doing, the solution presented herein achieves diversity gain in some scenarios, e.g., when adjacent PAAMs have partially overlapping frequency ranges, facilitates unsymmetrical BW support for uplink (UL) and downlink (DL) implementations, and/or provides service to more users.

A multi-step coherent combination of signals received by multiple distributed phased antenna arrays to increase the coverage area of the distributed phase antenna arrays while decreasing the loss of such antennas, particularly in sections of a service area that traditionally are not covered by such antennas. More particularly, the solution presented herein coherently combines, in a multi-step coherent combination process, two or more data streams from two or more Phased Array Antenna Modules (PAAMs) to generate output data for the corresponding wireless device. In so doing, the solution presented herein achieves diversity gain in some scenarios, e.g., when adjacent PAAMs have partially overlapping frequency ranges, facilitates unsymmetrical BW support for uplink (UL) and downlink (DL) implementations, and/or provides service to more users.

Methods, systems, and devices for wireless communications are described. A first device may transmit, from a first antenna of a first antenna array of the first device to a second antenna of a second antenna array of a second device, a first set of reference signals. The first device may transmit, from a first plurality of antennas of the first antenna array to a second plurality of antennas of the second antenna array, a second plurality of reference signals. The first device may receive, from the second device, an indication based at least in part on a linear offset and one or more rotational offsets estimated by the second device associated with the first set of reference signals and the second plurality of reference signals. The first device may communicate with the second device using the first antenna array based on the indication.

Methods, systems, and devices for wireless communications are described. A first device may transmit, from a first antenna of a first antenna array of the first device to a second antenna of a second antenna array of a second device, a first set of reference signals. The first device may transmit, from a first plurality of antennas of the first antenna array to a second plurality of antennas of the second antenna array, a second plurality of reference signals. The first device may receive, from the second device, an indication based at least in part on a linear offset and one or more rotational offsets estimated by the second device associated with the first set of reference signals and the second plurality of reference signals. The first device may communicate with the second device using the first antenna array based on the indication.