Last edited by Nikonris
Friday, July 24, 2020 | History

2 edition of Free-space electric field mapping of microwave diathermy applicators found in the catalog.

Free-space electric field mapping of microwave diathermy applicators

Donald M Witters

Free-space electric field mapping of microwave diathermy applicators

by Donald M Witters

  • 234 Want to read
  • 9 Currently reading

Published by Dept. of Health, Education, and Welfare, Public Health Services, Food and Drug Administration, Bureau of Radiological Health in Rockville, Md .
Written in English

    Subjects:
  • Diathermy,
  • Microwave measurements

  • Edition Notes

    Statementby Donald M. Witters, Jr., Gideon Kantor, Division of Electronic Products
    SeriesDHEW publication ; no. (FDA) 78-8074, DHEW publication -- no. (FDA) 79-8074
    ContributionsKantor, Gideon, joint author, United States. Bureau of Radiological Health. Division of Electronic Products
    The Physical Object
    Paginationvi, 18 p. :
    Number of Pages18
    ID Numbers
    Open LibraryOL17971841M

    measurement technique over a wide microwave frequency range and at room temperature. The moisture levels are those of interest to the grain industry. 2. Free-space measurements At microwave frequencies, different measurement techniques can be used. These include transmission line techniques (waveguide, coaxial and free-space), impedance and cavity. Absolute value of the measured electric field distribution at GHz, normalized to the maximum field value measured in front of the reference object/network (in the region x = mm x = mm): (a) reference object inside the waveguide, (b) reference object and Cited by:

    The object is assumed to have cylindrical geometry, with the cylindrical axis directed along a direction parallel to the electric field vectors of the incident electric field (i.e., the z axis). Moreover, the dielectric properties are assumed to be independent from the z coordinate, i.e., ϵ Author: Sandra Costanzo, Giuseppe Di Massa, Matteo Pastorino, Andrea Randazzo, Antonio Borgia. Free-Space Electromagnetic Characterization of Materials for Microwave and Radar Applications Habiba Hafdallah Ouslimani, Redha Abdeddaim, and Alain Priou University Paris X, Ville d’Avray, France Abstract Characterizationof the electrical material properties εr, µrand tanδis of prime importance for all microwave and antenna design.

    While some free-space facilities exist that can characterize down to MHz, the method is most useful for characterizing materials from 2 GHz through millimeter waves. This book is designed to acquaint engineers and scientists with the theory and practice of using microwave focused beam systems for free-space characterization of materials. RF and Microwave Low Power Dielectric Heating Using Parallel Plate Applicator to Control Insect Pests on Tomato Plant Sandeep V. Gaikwad1, * and Arun N. Gaikwad2 Abstract—This paper focuses on electromagnetic exposure to control insect pests in agriculture using parallel plate : Sandeep Vinayak Gaikwad, Arun N. Gaikwad.


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Free-space electric field mapping of microwave diathermy applicators by Donald M Witters Download PDF EPUB FB2

Get this from a library. Free-space electric field mapping of microwave diathermy applicators. [Donald M Witters; Gideon Kantor; United States. Bureau of Radiological Health. Division of Electronic Products.]. An evaluation of microwave diathermy applicators using free space electric field mapping.

Witters DM, Kantor G. An electric field mapping study is described which was designed and executed to study the performance characteristics of various prototype and currently used microwave diathermy applicators operating at by: 5. Free-space electric field mapping of microwave diathermy applicators / (Rockville, Md.: Dept.

of Health, Education, and Welfare, Public Health Services, Food and Drug Administration, Bureau of Radiological Health, ), by Donald M Witters, Gideon Kantor, and United States.

Bureau of Radiological Health. Donald M. Witters has written: 'Free-space electric field mapping of microwave diathermy applicators' -- subject(s): Microwave measurements, Diathermy Asked in Consumer Electronics, Verbs, Nouns.

Donald M. Witters has written: 'Free-space electric field mapping of microwave diathermy applicators' -- subject(s): Microwave measurements, Diathermy Asked in Circumcision. Author(s): Witters,Donald M; Kantor,Gideon; United States. Bureau of Radiological Health. Division of Electronic Products.

Title(s): Free-space electric field mapping of microwave diathermy applicators/ by Donald M. Witters, Jr., Gideon Kantor, Division of Electronic Products. Simply stated, microwave applicators are devices that are designed to heat a material by exposing it to a microwave field in a controlled environment.

The objective is to cause a controlled interaction between the microwave energy and the material to occur under safe, reliable, repeatable, and economical operating conditions. Applicators may be. DOCUMENT RESUME. SE Goldman, Lee W. Radiographic Film Processing Quality Assurance: A FDA Free-Space Electric Field Mapping of Microwave Diathermy Applicators (PB /AS, $).

Source Book of Educational Materials for Radiation Therapy (GPO -$) (PB /AS, mf only). articles on microwave near-field imaging that are of possible interest to the reader include references [7], [8] and [9]. We do not consider localized microwave electromagnetic field probing in this review, as the reader can find coverage of this topic in [7] and [9] and in the chapter by Paulson and van der Weide in this book.

Irena Zivkovic and Axel Murk (November 14th ). Free-Space Transmission Method for the Characterization of Dielectric and Magnetic Materials at Microwave Frequencies, Microwave Materials Characterization, Sandra Costanzo, IntechOpen, DOI: / Available from:Cited by: 9.

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 11, NO. 4, APRIL Electric Field Mapping System Using an Optical-Fiber-Based Electrooptic Probe K.

Yang, Linda P. Katehi, Fellow, IEEE, and J. Whitaker Abstract— A microwave electric-field mapping system based on electrooptic sampling has been developed using micromachined. We present a free-space microwave experimental measurement system for the non-destructive testing of composite materials.

The system operates in the Q- frequency band of 30 GHz to 50 GHz with fixed wave propagation distance between free-space : Jan Obrzut, Ahmed M. Hassan, Edward J. Garboczi. 2 Will-be-set-by-IN-TECH where D is electric induction, E is electric field, B is magnetic induction and H is magnetic field.

ε0 and μ0 are permittivity and permeability of free space, respectively. Values of ε0 and μ0 are: ε0= 10−12 [F m] and μ0=4 π 10−7 [Vs Am]. Dielectric permittivity and magnetic permeability of the free space are related to each other in the File Size: 1MB. PRODYN’s AD Model electric field (D-DOT) sensors are small to medium, free-space, high frequency sensors that measure time rate of change of electric displacement.

Being differential, they have two asymptotic sensing elements accurately positioned on opposite sides of a common ground plate and have a radial output direction.

Microwave Measurements of Complex Permittivity by Free Space Methods and Their Applications (STUDIES IN ELECTRICAL AND ELECTRONIC ENGINEERING) [Musil, Jindrich, Zacek, Frantisek] on *FREE* shipping on qualifying offers.

Microwave Measurements of Complex Permittivity by Free Space Methods and Their Applications (STUDIES IN ELECTRICAL AND ELECTRONIC. A microwave creates a dipole alternating "magnetic" field, not an "electric field". By creating the alternating dipole magnetic field, its emitting electromagnetic radiation, which in turn bounces around inside the metal microwave box until it hits food molecules that are capable of absorbing that frequency of electromagnetic radiation.

PRODYN electric field sensors are small to medium-sized, high frequency sensors that measure time rate of change of electric displacement.

Sensors are available in the following types: Free-field Ground plane Surface current density Probes with sensitive areas of up to 1m² or upper 3dB points of 28GHz are available.

The voltage output from the probe is proportional to the rate of change of. applicator microwave publications temperature controlled cavity applicator for radio- frequency wave irradiation of mammalian cell lopment of a mhz direct-contact applicator for therapeutic heating of tissues ermy frequency for a direct contact applicator ield mapping of microwave diathermy applicators oduced in.

changing electric field. This results in less energy storage and higher rotational losses. At these frequencies the mass of the ions prevents them from responding the the changing electric field.

At even higher frequencies the water molecules no longer respond to the electric field. Permittivity usually is measured at frequencies below Hz File Size: 1MB.

Free-space measurement of dielectric properties of cereal grain and oilseed at microwave frequencies Article (PDF Available) in Measurement Science and Technology 14(5) May with Reads.

Free Space Microwave Focusing by a Negative Index Gradient Lens Article (PDF Available) in Applied Physics Letters 88(8) February with Reads How we measure 'reads'.xii pv Power density Wm¡3 t Time ∆t Time step size T Temperature K wi Edge shape function assocuiated with edge i Z0 Impedance of free space Ω Zw Waveguide impedance Greek Symbols fl Phase constant Γ Surface † Permitivity, †0†0 †0 Relative dielectric constant †00 Relative dipolar loss factor †⁄ Absolute permitivity † 0(†0 ¡|¾e=!†0) †0 Permittivity of free.The incident electric field generally is not uniform along the axis of the dipole antenna (z axis).

To provide spatial resolution of the field, the antenna is often made physically short and elec- trically short, Poh = 2nh/ho File Size: 1MB.