There are provided methods and systems configured to perform calibration of antenna array systems, for example during production, avoiding the use of external setups or external measurements. The method comprising: (i) measuring the delay of a dedicated calibration transmission line for each SUT, for example during production, using internal built-in system capabilities; (ii) comparing the measured delay to a known delay of an identical transmission line of a reference system; (iii) computing, based on this comparison, compensation values with respect to the reference system of delay (or phase), for all transmission lines of the SUT; (iv) calibrating the SUT using the computed compensation values for all transmission lines of the SUT.

Aspects of the subject disclosure may include, for example, obtaining channel cross correlation data relating to multiple user equipment (UEs) being served in a cell, wherein the channel cross correlation data comprises a correlation coefficient associated with a first UE of the multiple UEs and a second UE of the multiple UEs, identifying that the first UE is experiencing decreasing throughput, responsive to the identifying that the first UE is experiencing decreasing throughput, determining whether the correlation coefficient associated with the first UE and the second UE satisfies a correlation threshold, and, based on a first determination that the correlation coefficient does not satisfy the correlation threshold, adjusting a downlink (DL) transmit power allocation for transmissions directed to the first UE. Other embodiments are disclosed.

A method and apparatus for mitigating the beam squint effect in a wideband wireless communication device involving a phased antenna array. Time delay units are operated in series with phase shifters to apply phase shifts to signals fed to or received from antenna elements. The array may be subdivided into sub-arrays each associated with its own time delay unit, and with each antenna element associated with its own phase shifter. The phase shifters are operated to compensate for location mismatch between time delay units and antenna elements, and also to compensate for practical limitations of the time delay units, such as length and quantization limitations.

An antenna structure and an electronic device, are provided. The antenna structure includes a first antenna and a second antenna, the first antenna includes a first radiator, a second radiator, a first port, and a second port, and the second antenna includes a third radiator and a third port. The first radiator, the second radiator, and the third radiator jointly constitute a ring structure, and there is a first gap between the first radiator and the second radiator, a second gap between the first radiator and the third radiator, and a third gap between the second radiator and the third radiator.

Aspects of the subject disclosure may include, for example, determining a coherence block for each user equipment (UE) of a plurality of UEs being served by the first cell, resulting in a plurality of coherence blocks, responsive to the determining, identifying a smallest coherence block from the plurality of coherence blocks, identifying a pilot sequence length based on the smallest coherence block, determining a plurality of orthogonal pilot sequences based on the identifying the pilot sequence length, designating, from the plurality of orthogonal pilot sequences, a first group of orthogonal pilot sequences for use in the first cell, and distributing, to each neighboring cell of a plurality of neighboring cells adjacent to the first cell, a respective group of orthogonal pilot sequences from a remainder of the plurality of orthogonal pilot sequences, to prevent pilot contamination between the first cell and the plurality of neighboring cells. Other embodiments are disclosed.

A differential time delay shifter may comprise a 1-to-N switch, where N is an integer greater than 1. The switch may have a pole contact, N throw contacts, and a pole arm to selectively couple the pole contact to one of the throw contacts. One throw contacts may be a first throw contact at a first switch position, and one throw contacts may be a last throw contact at a last switch position. The shifter may further comprise one or more transmission lines, each of which is electrically connected between two of the N throw contacts. The shifter may further comprise a source configured to generate an electromagnetic signal. The source may be electrically coupled to the pole contact, to convey the signal to the pole contact. The shifter may further comprise one or more loads, a first of which is electrically coupled to the first throw contact.

Technologies directed to using selective true-time delay for energy efficient beam squint mitigation in phased array antennas in communication systems are described. One communication system includes a first register to store a first value indicative of a mode of operation of the communication system and a second register to store a value corresponding to a first time duration. The communication system includes antenna elements, digital beamforming (DBF) devices, phase shifters, and delay circuitry. In a first mode, the delay circuitry does not delay a first signal and, in a second mode, the delay circuitry delays a second signal.

Aspects of the subject disclosure may include, for example, a motorized drive assembly that includes a motor and a drive assembly, where the drive assembly has an axle configured to be disposed through a rotatable substrate of a polarization shifter for a dual-polarized radiating element, the axle being further configured to fasten, at a first end of the axle, to a support structure of the polarization shifter, wherein, when the motorized drive assembly is assembled to the polarization shifter, the motor is controllable to impart rotational forces, via movement of the axle, to the polarization shifter to effect polarization adjusting for the dual-polarized radiating element. Other embodiments are disclosed.

A multi-beam-former for an antenna array is described, the multi-beam former comprises N transceiver terminals for connecting a transmitter and/or receiver and N antenna terminals for connecting to a respective antenna and a plurality of couplers and matrix phase shifters arranged in an N×N Butler matrix configuration between the N transceiver terminals and the N antenna terminals. At least some of the matrix phase shifters include a switchable matrix phase shifter configured to switch between a respective first phase shift value and a respective second phase shift value; a plurality of bypassable phase shifters arranged between at least some of the couplers and the antenna terminals and configured to switch between a respective further phase shift value and a zero phase shift. The multi-beam former is operable to select one of M different beam angles for a signal, wherein M is greater than N.

Aspects of the subject disclosure may include, for example, receiving sounding reference signal (SRS) symbols from antenna elements of each of multiple modular antenna arrays, wherein the multiple modular antenna arrays are operatively combined to form a coherent antenna system, performing an uplink (UL) channel estimation and a downlink (DL) channel estimation, across a plurality of physical resource blocks (PRBs), based on the SRS symbols, calculating, for the antenna elements, a plurality of uplink (UL) combining weights based on the UL channel estimation and a plurality of downlink (DL) precoder weights based on the DL channel estimation, and causing the plurality of UL combining weights and the plurality of DL precoder weights to be applied to the antenna elements, thereby adjusting beamforming of the coherent antenna system. Other embodiments are disclosed.