Results 71 to 80 of about 67,929 (263)

Handbook of RF and wireless technologies /

, 2004
Expert contributors drawn from the ranks of academia and industry have authored chapters in such areas as third-generation wireless, wireless sensor networks, RF power amplifiers, spread spectrum modulation, signal propagation, antennas, and other key ...
Dowla, Farid U.
core  

Operation and calibration of VNA-based large signal RF I-V waveform measurements system without using a harmonic phase reference standard

, 2013
A new approach is presented that allows a Vector Network Analyzer to be operated as a Large Signal Network Analyzer without the need for a harmonic phase reference generator.
Tasker, Paul J., J. Lees, R.S. Saini, Tudor Williams, Lees, Jonathan, P.J. Tasker, J.W. Bell, Bell, James J., Williams, T., A. Aldoumani, Aldoumani, Anoor, Saini, R. S.   +11 more
core   +1 more source

Cellular Digital Post-Distortion: Signal Processing Methods and RF Measurements

, 2023
In this paper, we study the feasibility of digital post-distortion (DPoD) based mitigation of transmitter nonlinear distortion in cellular networks. With specific emphasis on downlink, we describe a computationally efficient one-shot method to estimate ...
Xu, Guixian, Valkama, Mikko, Anttila, Lauri, Babaroglu, Huseyin, Turunen, Matias, Allén, Markus   +5 more
core   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Support-vector-machine based automatic performance modelling and optimisation for analogue and mixed-signal designs

, 2008
The growing popularity of analogue and mixed-signal (AMS) ASIC and SoC designs for communication applications has led to an increasing requirement for high efficiency performance modelling and optimisation methodologies in AMS synthesis systems. Recently,
Ren, Xianqiang
core  

Low-level RF signal processing for the Next Linear Collider Test Accelerator [PDF]

, 1997
In the X-band accelerator system for the Next Linear Collider Test Accelerator (NLCTA), the Low Level RF (LLRF) drive system must be very phase stable, but concurrently, be very phase agile.
Adolphsen, C., Holmes, S., Ziomek, C.
core  

Consumed by Abdominal Distention

Arthritis Care &Research, EarlyView.
Abimbola Fadairo‐Azinge, James Grenert, Brian Haas, Mary Margaretten   +3 more
wiley   +1 more source

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Dual-Signal Direct Time-of-Flight Method for Long-Range Groundwater Level Monitoring in Observation Wells

Sensors
Accurate and reliable groundwater-level monitoring in deep observation wells remains difficult for conventional non-contact ultrasonic systems because narrow tubular geometries intensify multipath reflections, signal attenuation, and echo ambiguity. This
Abror Shavkatovich Buriboev, Farkhat Rajabov, Jamoljon Djumanov, Khudoyorkhon Jamolov, Akmal Abduvaitov, Temur Azamov, Ilhom Rahmatullayev, Cheolwon Lee   +7 more
doaj   +1 more source

A Novel Enhanced Positioning Trilateration Algorithm Implemented for Medical Implant In-Body Localization

International Journal of Antennas and Propagation, 2013
Medical implants based on wireless communication will play crucial role in healthcare systems. Some applications need to know the exact position of each implant. RF positioning seems to be an effective approach for implant localization.
Peter Brida, Juraj Machaj
doaj   +1 more source