Approximations for Leaky Wave Amplitudes in Acoustic Imaging: Applications to High Frequency Sonar

1997 ◽  
pp. 369-374 ◽  
Author(s):  
Philip L. Marston
Keyword(s):  
High Frequency ◽  
Acoustic Imaging ◽  
Leaky Wave

The Use of Sub-Bottom Profiler in the Surveying of Embankments’ Foundation

2010 ◽  
Vol 36 ◽  
pp. 162-166
Author(s):  
Rui Wang ◽  
Yuan Bao Leng ◽  
Chang Zheng Li
Keyword(s):  
High Resolution ◽  
High Frequency ◽  
Yellow River ◽  
Acoustic Signals ◽  
Acoustic Imaging ◽  
Underwater Acoustic ◽  
Key Points ◽  
Series Of Experiments ◽  
Civil Engineers

Sub-bottom profiler is a kind of underwater acoustic imaging equipment. It can scan the sub-water stratums with acoustic signals and presents the section imaging. The frequency rang and transmitting power are key points to choice a suitable profiler. Generally, high frequency means high resolution and small imaging range. Transmitting power affects the imaging range also. Sub-bottom profiler can tell hydraulic and civil engineers what the embankments’ foundation like, especially the distribution of enrockments. With these information, engineers can evaluate the safety of embankments and decide what to do to keep them standing strong. A typical profiler called X-Star and a series of experiments carried on Yellow River, the famous sediment-laden and the 2nd longest river of China.

scholarly journals High-frequency acoustic imaging of L Lake Phase 4 [Savannah River Site, South Carolina]

1997 ◽  
Author(s):  
D.L. Dunn ◽  
Keith J. Sjostrom ◽  
Rodney L. Leist ◽  
Thomas S., Jr. Harmon
Keyword(s):  
South Carolina ◽  
High Frequency ◽  
Savannah River Site ◽  
Acoustic Imaging ◽  
Savannah River ◽  
River Site

Substrate Integrated Waveguide Based Leaky Wave Antenna for High Frequency Applications and IoT

2019 ◽  
Vol 09 ◽  
Author(s):  
Manvinder Sharma ◽  
Harjinder Singh
Keyword(s):  
Radiation Pattern ◽  
High Frequency ◽  
Dielectric Substrate ◽  
Substrate Integrated Waveguide ◽  
Leaky Wave ◽  
Carbon Modeling ◽  
Directional Radiation ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
High Frequency Waves

Background & Objective: Internet of things devices managed by wireless networks so that higher data rates can be achieved. With increase in demand of usage of Internet microwave signals are capable for delivering the demand. However these high frequency waves needs a waveguide to propagate otherwise they get affected due to atmospheric attenuation and rain fade. a modified structure of rectangular waveguide is used named as Substrate Integrated Waveguide (SIW). In this paper, the work has been carried out taking SIW and Leaky Wave Antenna. The dielectric substrate was taken as carbon. Modeling of SIW Leaky wave Antenna is done by making C shaped Slots. Design steps for modeling LWA were orderly pursued also optimized with various equations followed by Finite Element Method based modeling. A range of frequency as input is taken from 7 GHz to 11 GHz to take the analysis of design modeled. Results & Conclusion: The result shows the electric field intensity and radiation pattern is directly proportional with frequency while the return loss is acceptable for applied frequency range. The proposed antenna can radiate in omni directional radiation pattern hence can be used to connect devices with IoT.

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