Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, a polarization performance loss indication that is indicative of a loss in polarization performance based on transitioning from a first operating state associated with a first frequency range to a second operating state associated with a second frequency range, wherein the first operating state corresponds to a first antenna configuration and the second operating state corresponds to a second antenna configuration, wherein the first antenna configuration corresponds to a first antenna orientation and the second antenna configuration corresponds to a second antenna orientation. The UE may receive, from the network node, configuration information indicative of at least one communication parameter associated with the at least one antenna array and based on the polarization performance loss indication. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may transmit, to another wireless node, information related to one or more properties of a first antenna array associated with the wireless node. The wireless node may receive, from the other wireless node, information related to one or more properties of a second antenna array associated with the other wireless node. The wireless node may communicate with the other wireless node over a wireless link using one or more beams associated with an operating frequency, wherein the operating frequency is based at least in part on the one or more properties of the first antenna array and the one or more properties of the second antenna array. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device may receive control signaling indicating a channel state information reference signal-resource indicator (CRI) for beam reporting, and receive a set of channel state information reference signals (CSI-RSs) in accordance with the CRI. The first wireless device may transmit a beam report indicating a first and second beamforming configurations associated with the CRI, where the first beamforming configuration is associated with an antenna module at the first wireless device, and where the second beamforming configuration is associated with the antenna module and one or more passive devices configured to reflect signal energy to or from the antenna module. The first wireless device may then communicate one or more messages with the second wireless device in accordance with the first beamforming configuration, the second beamforming configuration, or both.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability message that indicates an antenna module configuration, the antenna module configuration indicating an antenna module format of the UE. The UE may perform a beam management procedure according to a beam management mode associated with a frequency range and corresponding to the antenna module format and may receive, based on the beam management procedure, an indication of a set of parameters for communications using the frequency range. The UE may communicate, based on the set of parameters, one or more messages using the frequency range and one or more antenna modules. Additionally, or alternatively, the UE may receive an indication of a resource allocation for a beam weighting procedure, the resource allocation corresponding to the antenna module format of the UE and may perform the beam weighting procedure using the resource allocation.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving device may receive an indication of at least one factor associated with an antenna array thinning operation at a transmitting device. Accordingly, the receiving device may adjust at least one reception parameter at the receiving device based at least in part on the at least one factor. Similarly, a transmitting device may transmit an indication of at least one factor associated with antenna array thinning operation. Accordingly, the transmitting device may perform the antenna array thinning operation based at least in part on the at least one factor. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE) may receive a control message indicating a reference signal configuration for beam calibration by the UE based on a beamforming characterization status. The UE may receive a set of beam calibration reference signals based on the reference signal configuration. The UE may measure the set of beam calibration reference signals and generate a set of beamforming weights for use in communications by the UE based on the measuring and the beamforming characterization status. In some cases, the UE may transmit or forward a beamforming codebook based on the beamforming weights to a network entity. The network entity or the UE may forward the beamforming codebook to other UEs of a same design class as the UE.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving device may receive an indication of at least one factor associated with an antenna array thinning operation at a transmitting device. Accordingly, the receiving device may adjust at least one reception parameter at the receiving device based at least in part on the at least one factor. Similarly, a transmitting device may transmit an indication of at least one factor associated with antenna array thinning operation. Accordingly, the transmitting device may perform the antenna array thinning operation based at least in part on the at least one factor. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of an interference threshold for interference caused by beamforming at the UE. The UE may transmit a signal using a beam with an interference value that satisfies the interference threshold. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a capability to use a set of beamforming configurations associated with a beamforming circuit architecture of the UE. The UE may receive an indication of a selected beamforming configuration to use for one or more communications. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, a polarization performance loss indication that is indicative of a loss in polarization performance based on transitioning from a first operating state associated with a first frequency range to a second operating state associated with a second frequency range, wherein the first operating state corresponds to a first antenna configuration and the second operating state corresponds to a second antenna configuration, wherein the first antenna configuration corresponds to a first antenna orientation and the second antenna configuration corresponds to a second antenna orientation. The UE may receive, from the network node, configuration information indicative of at least one communication parameter associated with the at least one antenna array and based on the polarization performance loss indication. Numerous other aspects are described.

Abstract: The present disclosure relates to dynamic antenna array reconfiguration and signaling in millimeter wave bands. A user equipment (UE) may detect an antenna array change condition. The UE may transmit a request for beam training for an antenna array configuration in response to the detecting. The request for beam training may include a requested antenna array configuration for the UE and an indication of beam weights to use with the requested antenna array configuration. A base station may determine whether to grant or deny the requested antenna array configuration for the UE. The UE may receive, from the base station, an indication of an antenna array configuration for the UE. The base station may transmit the number of reference signals as a set of contiguous channel state information reference signals (CSI-RS). The UE may train the reconfigured active antenna array configuration based on the reference signals.

Abstract: Aspects of the present disclosure relate to utilizing an intelligent reflecting surface (IRS), a tracking algorithm, or both, to receive, calibrate, and maintain orbital angular momentum (OAM) signaling between wireless devices. The present disclosure describes a first wireless device transmitting spatial-multiple input-multiple output (MIMO) beams to the IRS such that reflected waves from the IRS form a spatial mixture of OAM modes. The IRS may reflect such OAM modes to a second wireless device for subsequent reflection (e.g., a second IRS), reception, calibration, and optimization. For example, the second wireless device may perform pattern recognition of the concentric OAM modes (e.g., by estimating ellipse geometry) to determine the modes of the OAM signaling. The second wireless device may also perform decorrelation, where small perturbations to the elliptical OAM geometry allow the second wireless device to perform one or more optimization techniques related to the OAM signaling.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to report feedback to a base station to address polarization impairments in multiple-input multiple-output (MIMO) communications. The UE and the base station may establish a communications link using a pair of orthogonally polarized beams, where the pair of polarized beams may be selected based on a beam sweep procedure. The UE may transmit a report to the base station indicating one or more polarization parameters associated with beam pairs identified in the beam sweep procedure, such as one or more orthogonality parameters, one or more polarization parameters relating to one or more beam pairs, or one or more angular spread parameters. Based on the report, the base station may transmit a beam configuration to the UE for polarization MIMO communications.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, a polarization performance loss indication that is indicative of a loss in polarization performance based on transitioning from a first operating state associated with a first frequency range to a second operating state associated with a second frequency range, wherein the first operating state corresponds to a first antenna configuration and the second operating state corresponds to a second antenna configuration, wherein the first antenna configuration corresponds to a first antenna orientation and the second antenna configuration corresponds to a second antenna orientation. The UE may receive, from the network node, configuration information indicative of at least one communication parameter associated with the at least one antenna array and based on the polarization performance loss indication. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may transmit, to another wireless node, information related to one or more properties of a first antenna array associated with the wireless node. The wireless node may receive, from the other wireless node, information related to one or more properties of a second antenna array associated with the other wireless node. The wireless node may communicate with the other wireless node over a wireless link using one or more beams associated with an operating frequency, wherein the operating frequency is based at least in part on the one or more properties of the first antenna array and the one or more properties of the second antenna array. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a synchronization signal block (SSB) burst set including a first set of SSBs transmitted using a first codebook and a second set of SSBs transmitted using a second codebook. In some cases, the first codebook may be configured for beamforming at a first transmission distance range (e.g., for far field transmissions) and the second codebook may be configured for beamforming at a second transmission distance range (e.g., for near field transmissions). Based on transmitting the SSB burst, the base station may receive an indication of a first SSB from the first set or the second set from a user equipment (UE). The base station may then communicate messages to the UE using a transmission beam and codebook associated with the first SSB indicated by the UE.

Abstract: An antenna assembly includes an array of patch antennas arranged above a rectangular ground plane. The patch antennas are arranged in a sequence beginning at a first end of the rectangular ground plane and continuing across a width of the rectangular ground plane to a second end. With regard to this sequence, a plurality of polarization feeds alternate between being adjacent a first corner to being adjacent a second corner of the patch antennas and/or a plurality of via walls alternate in orientation along portions of a first edge of the rectangular ground plane and along portions of a second edge of the rectangular ground plane.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may communicate, using a first set of active antenna elements of an antenna array, during a first time period. The network node may activate a second set of active antenna elements based on a dynamic antenna set switching scheme, wherein the second set of active antenna elements includes at least one active antenna element not included in the first set, wherein a difference between a first main lobe property and a second main lobe property satisfies a main lobe threshold, and wherein a difference between a first side lobe property and a second side lobe property satisfies a side lobe threshold. The network node may communicate, using the second set of active antenna elements, during a second time period. Numerous other aspects are described.

Abstract: An antenna system includes: a patch antenna element disposed at a first level of the antenna system; an energy coupler configured and coupled to the patch antenna element to transfer energy between the patch antenna element and a front-end circuit; a ground conductor disposed at a second level of the antenna system, the patch antenna element and the ground conductor being disposed a separation distance away from each other and bounding respective sides of a volume defined by a projection, normal to a surface of the patch antenna element, of the patch antenna element to the ground conductor; and a floating conductor that is displaced from the ground conductor and the patch antenna element, the floating conductor comprising a body extending over a portion of the separation distance outside of, and in close proximity to, the volume.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may include an L shaped antenna module, which may include a first array of antenna elements in one dimension and a second array of antenna elements in a second dimension. In an L shaped antenna module, antenna element configurations may be used that combine antenna elements across the two sides of the “L”. In some aspects, a UE may dynamically select a configuration of antenna elements of an L shaped antenna module to enhance performance and power consumption. In some aspects, the UE may select whether to use a cross-polarization configuration or a co-polar configuration for the L shaped antenna module.