A 28GHz 41%-PAE linear CMOS power amplifier using a transformer-based AM-PM distortion-correction technique for 5G phased arrays

SN Ali, P Agarwal, J Baylon, S Gopal… - … Solid-State Circuits …, 2018 - ieeexplore.ieee.org
… measured phase distortion is achieved at P1dB for the 2-stage amplifier at 28GHz. The distortion
… The PA achieves <1 measured phase distortion at P1dB across 27 to 31GHz. The large-…

On-board calibration methods for mechanical distortions of satellite phased array antennas

T Takahashi, N Nakamoto, M Ohtsuka… - IEEE transactions on …, 2011 - ieeexplore.ieee.org
distortion is necessary. Phased arrays can be electrically calibrated by compensating for
the … correction. This process can be carried out by taking into account any electrical variation …

Development of phased array techniques to improve characterization of defect located in a component of complex geometry

S Mahaut, O Roy, C Beroni, B Rotter - Ultrasonics, 2002 - Elsevier
… the phased array transducer was moved over the component. Those delay laws allow to
efficiently compensate the beam distortions … of beam distortions correction using a phased array. …

Beam-shape correction in deployable phased arrays

R Yonezawa, Y Konishi, I Chiba… - IEEE transactions on …, 1999 - ieeexplore.ieee.org
… attitude or distortion of the antenna surface can be corrected by determining the excitation
phase by … the necessary number of observation points and examine the case when distortion

Correlation processing for correction of phase distortions in subaperture imaging

B Tavh, M Karaman - IEEE transactions on ultrasonics …, 1999 - ieeexplore.ieee.org
… There have been many correlation-based studies on phase aberration correction for
phased array imaging [18]–[24], and motion compensation in synthetic aperture imaging [25]–[28]. …

Aberration correction on a two-dimensional anisotropic phased array (medical US imaging)

M O'Donnell, PC Li - IEEE 1991 Ultrasonics Symposium,, 1991 - ieeexplore.ieee.org
… -D arrays. In this paper we explore the extension of iD phase correction methods to 2-D
anisotropic arrays. … The error presented in this ligure is a very significanl distortion. The two lower …

Phase aberration correction and motion compensation for ultrasonic hyperthermia phased arrays: Experimental results

H Wang, ES Ebbini, M O'Donnell… - IEEE transactions on …, 1994 - ieeexplore.ieee.org
… Although phase distortions caused by tissue inhomogeneities may significantly defocus the
… can be dramatically improved after phase aberration correction. As shown in Fig. 8 and Fig. …

Corrections for mirror sources in phased array processing techniques

P Sijtsma, H Holthusen - 9th AIAA/CEAS Aeroacoustics Conference and …, 2003 - arc.aiaa.org
… wall, results from conventional phased array beamforming techniques are disturbed by the
… for correction of spectral distortion, because of its lack of robustness. Second, a correction

Phase aberration correction on two-dimensional conformal arrays

PC Li, M O'Donnell - IEEE transactions on ultrasonics …, 1995 - ieeexplore.ieee.org
… Beam distortion in the female breast has also been measured [18]. It was further shown that
array for this study is not available. Differences between a real-time, phased array imager …

Signal processing for phased array feeds in radio astronomical telescopes

BD Jeffs, KF Warnick, J Landon… - IEEE Journal of …, 2008 - ieeexplore.ieee.org
… ) pattern rumble bias correction algorithm to a 19-element focal plane array and verify the …
For astronomy, even modest beamshape distortions can be unacceptable. A small pointing …