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 8 of 8 for “"Beamsteering"”.
-
Novel Antenna Beamsteering for Wireless Applications
… of novel antenna capable of electronic beamsteering1 for various wireless applications. Such antennas aim to change the direction of their radiation patterns and directivities, electronically and dynamically, in a fast and efficient manner without the need of mechanical aid.<br/>In …
-
Phased Array Beamsteering in Composite Laminates for Guided Wave Structural Health Monitoring
<p>In this study a guided wave phased array beamsteering approach is applied to composite laminates. Current beamsteering algorithms derived for isotropic materials assume omnidirectional wave propagation. Due to inherent anisotropy in composites, guided wave propagation varies with direction and …
-
A Comparison of Beamforming Characteristics in Isotropic and Composite Plate Structures for use in Structural Health Monitoring
… plate-like simple structures using phased array beamsteering of guided Lamb waves is useful in damage detection and evaluation efforts. Lamb waves can be effectively used for beamsteering using a linear array. The experimentation primarily focuses on beamsteering in the aluminum panel, which …
-
Phased Array Damage Detection and Damage Classification in Guided Wave Structural Health Monitoring
… better signal interpretations. Phased array beamsteering is an effective means for damage detection in guided Lamb wave SHM systems. Using this method, the wave energy can be focused at localized directions or areas by controlled excitation time delay of each array element. In this research, …
-
Efficient Array Processing for Partial Signal Coherence
… in that it involves both matrix combining and beamsteering of the matched-filter outputs. We show that the discrete Fourier transform can simultaneously serve as an asymptotically optimal spatial combiner and beamsteering tool for uniform linear arrays suffering from partial coherence. …
-
Enabling Technologies for Joint Communication and Sensing in Aviation
… (MIMO) radar systems. Additionally, electronic beamsteering is employed as a complementary technology to MIMO antenna arrays, with the objective of enhancing detection accuracy within the angular range. Finally, unconventional antenna array designs, including distributed arrays, are being …
-
A Two -Dimensional Amplitude -Steered Array for Real -Time Volumetric Acoustic Imaging
… vertical direction and conventional phased array beamsteering in the horizontal direction. Several methods for displaying the data are presented, with projection images offering computational savings. Nonlinear propagation is also discussed, demonstrating that although frequency of the received …
-
A Compact RF/Photonic Antenna using a Quantum Dot Mode Locked Laser as a Source
The research presented here is focused on achieving an active compact RF/Photonic antenna module based on a broadband antenna design integrated with a quantum dot mode-locked laser (QDMLL). A two-section QDMLL is used to produce pulsed microwaves signals to feed the radiating antenna. To realize …