Results 61 to 70 of about 91,608 (298)

3D printed lattice structure for lightweight Ka‐band phased array antenna

Electronics Letters, 2021
Here a lightweight antenna array is designed and fabricated for a Ka‐band phased array antenna. From the perspective of advanced space‐borne engineering practice, a Kagome lattice structure is proposed for the lightweight antenna array applications and ...
Peng Lyu, Xiaofei Ma, Wei Wang, Jing Yang, Yan Li, Hongmou Zhang   +5 more
doaj   +1 more source

Pencil-Beam Single-point-fed Dirac Leaky-Wave Antenna on a Transmission-Line Grid

, 2016
Leaky-wave antennas (LWAs) are widely used as single-point-fed linear antenna arrays. The extension of LWAs to 2D implies that they can be used as single-point-fed 2D antenna arrays without requiring a complex feeding network.
Dorrah, Ayman H., Eleftheriades, George V.   +1 more
core   +1 more source

Perturbing open cavities: Anomalous resonance frequency shifts in a hybrid cavity-nanoantenna system [PDF]

, 2015
The influence of a small perturbation on a cavity mode plays an important role in fields like optical sensing, cavity quantum electrodynamics and cavity optomechanics. Typically, the resulting cavity frequency shift directly relates to the polarizability
Doeleman, Hugo M., Hendrikx, Ruud, Koenderink, A. Femius, Ruesink, Freek, Verhagen, Ewold   +4 more
core   +3 more sources

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Microstrip Patch Antennas Fed by Substrate Integrated Waveguide [PDF]

, 2013
Dizertační práce je zaměřena na výzkum mikropáskových flíčkových antén a anténních řad napájených vlnovodem integrovaným do substrátu (SIW). Využitím vlnovodu integrovaného do substrátu pro napájení mikropáskové flíčkové antény dochází ke kombinaci ...
Mikulášek, Tomáš
core  

Antenna-coupled TES bolometers used in BICEP2, Keck array, and SPIDER

, 2015
We have developed antenna-coupled transition-edge sensor (TES) bolometers for a wide range of cosmic microwave background (CMB) polarimetry experiments, including BICEP2, Keck Array, and the balloon borne SPIDER. These detectors have reached maturity and
A. D. Turner, A. G. Vieregg, A. Orlando, A. S. Rahlin, A. Trangsrud, A. Weber, B. G. Keating, C. A. Bischoff, C. B. Netterfield, C. D. Dowell, C. D. Reintsema, C. D. Sheehy, C. L. Kuo, C. L. Wong, C. Pryke, D. Barkats, D. V. Wiebe, E. Bullock, E. M. Leitch, G. C. Hilton, G. Chattopadhyay, G. Davis, G. P. Teply, H. G. LeDuc, H. Hui, H. T. Nguyen, I. Buder, J. A. Bonetti, J. A. Brevik, J. E. Tolan, J. J. Bock, J. M. Kovac, J. P. Filippini, J. P. Kaufman, J. Zmuidzinas, K. D. Irwin, K. Megerian, K. S. Karkare, K. W. Yoon, L. Duband, L. Moncelsi, M. Amiri, M. C. Runyan, M. Halpern, M. Hasselfield, M. Lueker, N. Llombart, null null, P. A. R. Ade, P. K. Day, P. Mason, P. Wilson, R. O’Brient, R. S. Tucker, R. Schwarz, R. V. Sudiwala, R. W. Aikin, R. W. Ogburn IV, S. A. Kernasovskiy, S. Fliescher, S. J. Benton, S. Kefeli, S. R. Golwala, S. R. Hildebrandt, S. Richter, V. Hristov, W. C. Jones, Z. K. Staniszewski   +67 more
core   +1 more source

Omniscopes: Large Area Telescope Arrays with only N log N Computational Cost [PDF]

, 2010
We show that the class of antenna layouts for telescope arrays allowing cheap analysis hardware (with correlator cost scaling as N log N rather than N^2 with the number of antennas N) is encouragingly large, including not only previously discussed ...
A. R. Thompson, J. Butler, J. May, J. Nakajima, J. Nakajima, Matias Zaldarriaga, Max Tegmark   +6 more
core   +2 more sources

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Adaptive Real Time Imaging Synthesis Telescopes [PDF]

, 2012
The digital revolution is transforming astronomy from a data-starved to a data-submerged science. Instruments such as the Atacama Large Millimeter Array (ALMA), the Large Synoptic Survey Telescope (LSST), and the Square Kilometer Array (SKA) will measure
Wright, Melvyn
core   +2 more sources

An Adaptive Human Pilot Model With Reaction Time Delay for Enhanced Adaptive Control in Piloted Systems

International Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces an adaptive human pilot model that captures pilot time‐delay effects in adaptive control systems. The model enables the prediction of pilot–controller interactions, facilitating safer integration and improved design of adaptive controllers for piloted applications.
Abdullah Habboush, Yildiray Yildiz
wiley   +1 more source