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Monday, August 3, 2020 | History

2 edition of Microwave backscatter from a capped dielectric lens found in the catalog.

Microwave backscatter from a capped dielectric lens

by John Edward Ambrose

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  • 5 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English


Edition Notes

Statementby John Edward Ambrose and Herbert Edwin Segelhorst
ContributionsSegelhorst, Herbert Edwin, Naval Postgraduate School (U.S.)
The Physical Object
Pagination1 v. :
ID Numbers
Open LibraryOL25208310M

The focusing effect of the converging lens is demonstrated by recording the irradiance profile at a distance of 20 cm, 30 cm and 40 cm of the lens, perpendicularly to the optical axis. The point of reference for the distance measurements is the sur-face of the convex side of the lens, near which the main planes of the lens (thick lens) are. a 1-m diameter, low cross-polarization dielectric lens antenna.a high-speed VXI-based data acquisition and digital signal processing (DSP) system. The dual-frequency antenna feed and lens was designed at the University of Massachusetts' Antenna produces collocated radiation patterns with a.

” IEEE Transactions on Microwave Theory and Techniques, vol, no, Dec. passives for wireless dielectric sensing, enabling a milk cap food sensor (Top) 3D printed RLC components (Bottom) IoT food sensor. Printed, flexible, backscatter-modulation Van-Atta sensor km-Range “patch” structure. Adjacent melt ponds were capped by a 3 cm thick ice lens at all times, and local pond fraction was 40%. Conversely, the bare ice series followed a 28 h, clear‐sky to cloud cover, melt‐freeze transition, caused by a ridge of high pressure which advected cold air, low‐level cloud ( m), and fog over the site.

Oguzhan Akgol, Danilo Erricolo, Piergiorgio L. E. Uslenghi, “Radiation from a parallel-plate waveguide ­­capped by a parabolic DNG metamaterial lens,” USNC-URSI National Radio Science Meeting, Boulder, CO, Jan. , Journal Articles. Yektakhah, B., and K. Sarabandi, “All-Directions Through-the-Wall Imaging Using a Small Number of Moving Omnidirectional Bi-static FMCW Transceivers,” IEEE Transations on Geoscience and Remote Sensing,vol. 57, no. 5, pp. , May


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Microwave backscatter from a capped dielectric lens by John Edward Ambrose Download PDF EPUB FB2

Enter the password to open this PDF file: Cancel OK. File name:. Microwave backscatter from a capped dielectric lens. By John Edward Ambrose and Herbert Edwin Segelhorst. Get PDF (5 MB) Abstract. Approved for public release; distribution unlimited.A specific application of a spherical dielectric lens provides the impetus for the development of a simple analytical method of predicting microwave backscatter.

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Fabricated dielectric lens Designation Variable Value Inner shell height F mm Outer shell height S mm Inner shell refraction index n2 Outer shell refraction index n1 Feed Gaussian width ϕ 64º 13 0 Maximum feed aperture ϕmax 90º Far-field Gaussian width α0 23º Maximum subtended angle αmax 31º • Lens material.

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A generator produces a non-ionizing electromagnetic input wave of preselected frequency, usually exceeding three gigahertz, and that input wave is used to irradiate the living tissue, being effectively focused into a minute.

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Microwave scatter Ocean waves ABSTRACT (Continue on reverae aide If necessary and Identity by block number) Modulation of coherent microwave backscatter at GHz, vertical polarization, and at a depression angle of 45° has been measured in a wind wave tank as a function of windspeed, modulating wave frequency, and amplitude.

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A key limitation is strong backscatter; this keeps the theoretical maximum efficiency of a single-layer lens to around 30%. This comes from the inherent behavior of an in-plane, electrically-small scatterer, producing a far-field radiation pattern like that of a Hertzian electrical dipole, with nearly equal parts forward and backward scattering.

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The sensor of MR filters all possible microwaves or radiofrequency waves that may be present in the room vicinity and may cause interference with the sensor. Dielectric constants and refractive indices of real materials 45 Dispersion 49 Plane boundaries 52 Scattering from rough surfaces 56 Description of surface scattering 57 Simple models of surface scattering 59 The Rayleigh roughness criterion 62 Models for microwave backscatter TABLE OF CONTENTS Article List A/D and D/A Conversion Architectures and Techniques Acoustic Microwave Devices Active Antennas Active Filters: Overview of Active Filter Structures Active Filters: Tools and Techniques for Active Filter Design Adaptive Array Antennas Altimeters Amplitude Shift Keying Analytical and Adaptive Modeling of Nonlinear High Power Amplifiers Anisotropy and Bianisotropy.A system for providing wireless, charging power and/or primary power to electronic/electrical devices is described whereby microwave energy is employed.

Microwave energy is focused by a power transmitter comprising one or more adaptively-phased microwave array emitters onto a device to be charged. Rectennas within the device to be charged receive and rectify the microwave energy and use it for.