Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"near-field measurements"”.
-
An Improved dipole-moment model based on near-field scanning for characterizing near-field coupling and far-field radiation from an IC
… an improved IC radiated emission model based on near-field measurements is proposed. The regularization technique and the truncated SVD method are employed together with the least square method to calculate the dipole moments from the near-field data. This dipole model has clear physical meaning: …
-
Characterization of nanostructured hexagonal boron nitride patterned via high-resolution ion beam lithography
… confined polaritons for technologically relevant near-IR and mid-IR applications. Furthermore, tuning the properties of hexagonal boron nitride, graphene, and other 2D materials in-plane and stacking them into heterostructures has the potential to create hybrid optical, electronic, thermal, and …
-
ANC of UAS Rotor Noise using Virtual Error Sensors
… ears, which is realistically in the far-field. Virtual error sensing (VES) can augment an ANC system using near-field measurements to estimate the response at a desired far-field location. In this way, the VES technique effectively shifts the zone of quiet from the location of the …
-
Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
… ice events is carried out based on direct measurements of ice-borne seismo-acoustic waves generated by ice fracturing processes. A major reason for studying this phenomenon is that this acoustic emission is a significant contributor to Arctic ocean ambient noise. Also the Arctic contains …
-
Sound Radiated from Turbulent Flow over Two and Three-Dimensional Surface Discontinuities
Measurements have been performed to understand the sound source mechanism in turbulent boundary layer flow over two and three-dimensional surface discontinuities whose height is smaller than the incoming boundary layer thickness. The work was performed in two different types of boundary layers: a …
-
Use of Computational Electromagnetics to Enhance the Accuracy and Efficiency of Antenna Pattern Measurements
… the accuracy and efficiency of antenna pattern measurements. </p> <p>This can be accomplished in many different ways, such as moving a single probe over the measurement plane to generate accurate planar near field to far field transformation methodology over the classical Fourier based modal …
-
Aeroacoustic Study of a Model-Scale Landing Gear in a Semi-Anechoic Wind Tunnel
… VT Anechoic Stability Wind Tunnel allowed noise measurements to be carried out using both a 63-elements microphone phased array and a linear array of 15 microphones. The noise sources were identified from the flyover view under various flow speeds and the phased array positioned in both the near …
-
Vibrational Imaging at the Nanoscale: Surpassing the Diffraction Limit Using Tip-Enhanced Raman Spectroscopy
… to improve the sensitivity of the chemical measurements by using rough silver or gold surfaces. The challenge of the simultaneous improvement of the spatial resolution and sensitivity was addressed by combining high resolution optical microscopy with the high sensitivity of surface-enhanced …
-
PCB-Based Heterogeneous Integration of PFC/Inverter
… increased, winding loss is increased nonlinearly. Furthermore, for a large-size planar inductor, flux distribution is usually non-uniform, resulting in dramatically increased hysteresis loss and eddy loss. Thus, current designs are challenged by the capability to increase their power range. …
-
Contribution to the uncertainty evaluation in the measurement of the main antenna parameters = Contribución a la evaluación de la incertidumbre en la medida de los principales parámetros de antena
… chambers, compact and extrapolation ranges, near-field testing techniques, improved polarization techniques and swept-frequency measurements, indirect measurements of antenna characteristics and automated test systems. The accurate determination of a physical quantity or performance by …