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Displaying records 971 to 980 of 1000 records.
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971. Reflection and Transmission Properties of a Metafilm with Application to a Controllable Surface Composed of Resonant Particles
Topic: Electromagnetics
Published: 11/1/2005
Authors: Christopher L Holloway, Mohamed Mohamed, Edward Kuester
Abstract: In recent work, we derived generalized sheet transition conditions (GSTCs) for the average electromagnetic fields across a metafilm, which, when properly designed, can have certain desired reflection and transmission properties. A metafilm is the two ...

972. Relative Permittivity Measurement of Rectangular Copper-Laminated Substrates Using the Full-Sheet Resonance Technique
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5062
Topic: Electromagnetics
Published: 4/1/1997
Author: R L Lewis

973. Relaxation Times for Magnetization Reversal in a High Coercivity Magnetic Thin Film
Topic: Electromagnetics
Published: 3/17/1999
Authors: Thomas J Silva, Anthony B Kos, N D Rizzo
Abstract: We used a magneto-optical Kerr effect microscope to measure 180° magnetization reversal in a high coercivity CoCr10Ta4 thin film subjected to nanosecond field pulses. Exponential magnetization decay occurs for pulse duration tp<10 ns followed by log ...

974. Remanent-magnetization reversal in nickel-manganese alloys
Topic: Electromagnetics
Published: 10/1/1978
Authors: Ronald B Goldfarb, T. Satoh, Carl E. Patton
Abstract: Weakly ordered nickel-manganese alloys, field cooled to 4 K, exhibit a reversal in remanent magnetization upon warming. The reversal is dependent on the state of atomic order the cooling field. A local environment model and Mn-rich aggregates, which ...

975. Remote, Near-Field Measurement of Large Antennas
Topic: Electromagnetics
Published: 8/17/2002
Authors: Ronald Curtis Wittmann, Michael H Francis
Abstract: It is difficult to characterize many antenna systems in a laboratory environment. Size is the major consideration, but an increasing number of sophisticated antennas are being placed at remote sites where they are simply inaccessible. Of particular c ...

976. Repeatability Study of Commercial Harmonic Phase Standards Measured by a Nonlinear Vector Network Analyzer
Topic: Electromagnetics
Published: 12/5/2003
Authors: Jeffrey A Jargon, Donald C. DeGroot, Vecchia Dominic
Abstract: In this paper, we present the first published repeatability study of commercial harmonic phase standards (HPS) measured by a nonlinear vector network analyzer. Specifically, we measure two harmonic phase standards, one of which is specified to 20 GHz ...

977. Representation of Acoustic Waves in Unbounded Domains
Topic: Electromagnetics
Published: 1/1/2005
Authors: Bradley K Alpert, Y Chen
Abstract: Compact, time-harmonic, acoustic sources produce waves that decay too slowly to be square-integrable on a line away from the sources. We introduce an inner product, arising directly from Green s second theorem, to form a Hilbert space of these wav ...

978. Requirements for an Effective Reverberation Chamber: Unloaded or Loaded
Topic: Electromagnetics
Published: 2/1/2006
Authors: Christopher L Holloway, David Allan Hill, Galen H Koepke, John M Ladbury
Abstract: In this paper we present two versions of a threshold metric for the purpose of accessing the effectiveness of a reverberation chamber. One metric is based on the chamber quality factor (Q), and the other is based on the volume of the loaded reverbera ...

979. Research on Site Qualifications above 1 GHz
Topic: Electromagnetics
Published: 2/18/2003
Authors: Michael Windler, Dennis G Camell
Abstract: This is a summary of recent efforts conducted under the auspices of the American National Standards Institute (ANSI) Accredited Standards Committee C63, Sub-committee 1, working group 1-13.2. The main purpose of this group is to assess the applicabil ...

980. Resistively-Tapered-Dipole Electric-Field Probes up to 40 GHz
Topic: Electromagnetics
Published: 8/1/1991
Authors: James Paul Randa, Motohisa Kanda, R. D. Orr

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