Analog Devices International Unlimited Company

Analog Devices Global Unlimited Company

Ahmed Khalil

Patrick Joseph Pratt

Mohamed Ahmed Youssef Abdalla

Raymond F Schinazi

Mohamed Abdelsalam

Mohamed Mobarak

Shaoman Zhou

Ahmed Essam Eldin Mahmoud Amer

Ahmed Mohamed Attia Zamzam

Hany Gamal Eldin Mohamed Bakeer

Franck Amblard

Steven J Coats

Aspects of this disclosure relate to an array calibration system and method using probes disposed between antenna elements. In certain embodiments, the calibration is performed by measuring near-field relative phase and amplitude measurements of the antenna elements and using such relative measurements to adjust the amplitude and phase of the transceivers connected to the antenna elements. In some embodiments, each antenna element within a set of antenna elements transmits a signal that is received by a single probe, and the received signals are assessed to determine relative phase or amplitude measurements. In some embodiments, a single probe transmits a signal that is received by each antenna element within a set of antenna elements, and the received signals are assessed to determine relative phase and amplitude measurements.

Antenna array calibration systems and methods

Apparatus and methods provide predistortion for a phased array. Radio frequency (RF) sample signals from phased array elements are provided along return paths and are combined by a hardware RF combiner. Phase shifters are adjusted such that the RF sample signals are phase-aligned when combined. Adaptive adjustment of predistortion for the amplifiers of the phased array can be based on a signal derived from the combined RF sample signals.

Phased array amplifier linearization

Aspects of this disclosure relate to systems and methods for calibration of antenna arrays. The calibration may be based on determining a reference value for the beamformer derived from measurements of phase and/or amplitude for each channel within the beamformer. The measurements of phase and/or amplitude can be stored in non-volatile memory. Using a difference between the reference value and the measured values for each channel, a portion of a global configuration table may be copied to each channel's memory. Each channel can be separately calibrated based on the portion of the global configuration table copied to the local memory of each channel.

On-chip phased array calibration systems and methods

An antenna apparatus for calibrating one or more of a plurality of antenna elements of an antenna array using one or more probes is disclosed. The apparatus includes an upconverter and/or downconverter (UDC) circuit and a calibration arrangement that includes a switching circuit. The switching circuit is configured to enable operation of the UDC in a first mode or in a second mode. When the UDC is in the first mode, the one or more probes are electrically disconnected from the UDC circuit and the UDC may be connected to at least one of the antenna elements. When the UDC is in the second mode, at least one of the one or more probes is connected to the UDC circuit.

Antenna apparatus with switches for antenna array calibration

Systems and methods for providing phase shifting in antenna arrays, such as phased antenna arrays of 5G cellular technology, are disclosed. In one aspect, an example phase shift module may include a phase shifter and a frequency multiplier. The phase shifter is configured to receive an LOcal oscillator (LO) signal and output a signal that is phase-shifted by a desired phase shift with respect to the LO signal. The frequency multiplier may be an enhanced frequency multiplier, configured to use not only the phase-shifted signal but also an inverted version of the phase-shifted signal to generate a frequency-multiplied signal having a frequency that is a multiple of the LO signal frequency. In another aspect, an example phase shift module may be configured to apply to an LO signal a phase shift that takes into consideration variations of phase shift over temperature.

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Dracut, MA, United States of America

Ahmed Khalil