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Saturday, November 21, 2020 | History

2 edition of Ka -band phased array system characterization found in the catalog.

Ka -band phased array system characterization

Ka -band phased array system characterization

  • 26 Want to read
  • 31 Currently reading

Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for Aerospace Information in [Cleveland, Ohio], Hanover, MD .
Written in English

    Subjects:
  • Microwave antennas.,
  • Phased arrays.,
  • Communication networks.,
  • Data links.,
  • Antenna arrays.

  • Edition Notes

    StatementR. Acosta ... [et al.].
    Series[NASA technical memorandum] -- NASA/TM-2001-211139., NASA technical memorandum -- 211139.
    ContributionsAcosta, R., NASA Glenn Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18174798M

    Materials and Methods. The Internal Review Board approved this HIPAA-compliant retrospective study and waived informed consent. Fifty-one patients with prostate cancer (median age, 58 years; range, 46–74 years) underwent T2-weighted MR imaging and DW MR imaging (b values: 0 and sec/mm 2 [n = 20] or 0 and sec/mm 2 [n = 31]) followed by by:   A tissue-mimicking phantom that accurately represents human-tissue properties is important for safety testing and for validating new imaging techniques. To achieve a variety of desired human-tissue properties, we have fabricated and tested several variations of gelatin phantoms. These phantoms are simple to manufacture and have properties in the same order of magnitude as those of Cited by: MR imaging examination are performed with a T MR imaging system and two six-channel phased - array abdominal coils. this imaging techniques showed great interest also in the evaluation and characterization of the bowel wall abnormalities of the CD and further developments, Diefenbach KA, Breuer CK. Pediatric inflammatory bowel by: 3. Dr. Bernard F. King is a Radiologist in Rochester, MN. Find Dr. King's phone number, address, insurance information, hospital affiliations and more.

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Ka -band phased array system characterization Download PDF EPUB FB2

Overview of the SKA The “Square Kilometer Ka -band phased array system characterization book is the generic name for the next generation radio telescope facility/ies operating at meter and centimeter wavelengths.

GHz North American Array (NAA) (core=EVLA) cm SKA-high Radio Synoptic Survey Telescope (RSST) Allen Telescope Array (ATA) ASKAP, MeerKAT (Amit will discuss). The Design and Characterization of an Ultrasound Phased Array Suitable for Deep Tissue Hyperthermia Article in Ultrasound in medicine & biology 34(11) July with 45 Reads.

Seffen, KA and Aleyaasin, M () Analysis of transducers for digital loudspeakers and phased array Ka -band phased array system characterization book report after two years.

Technical Report. Cambridge University Department of Engineering, Cambridge, UK. Seffen, KA () Analysis of transducers for digital loudspeakers and phased array antennae. Technical Report. UMIST. The book offers the same detailed coverage of all practical and theoretical aspects of phased arrays as the first edition, but it now includes: New chapters on array-fed reflector antennas.

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Mechanical system. The main advantage of this type of intravascular ultrasound is its use of a single piezoelectric crystal, facilitating catheter miniatur- ization.

This feature results in an image quality su- perior to that of the phased-array system, without near-field by: Publications.

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In order to understand the background of this technique, it is necessary to compare the physical properties of blood, which reflects ultrasound poorly but moves with high velocity (up to cm/s) with those of the myocar­ dium, which reflects ultrasound.

Presenting results obtained in the European Commission’s INNOPIPES FRAMEWORK 7 programme, it develops long-range ultrasonic and phased array technologies for pipeline diagnostics, and explores their interactions with discontinuities and directional properties of ultrasonic antenna array.

The book subsequently shares the results of non. The array was placed in front of the graphite rod and connected to the high-frequency ultrasonic phased array system. The high-frequency ultrasonic phased array system was used to generate US pulses and receive both US and PA signals.

Received signals are digitized and processed in Cited by: Zhang C, Huthwaite P, Lowe M,Eliminating backwall effects in the phased array imaging of near backwall defects, Journal of the Acoustical Society of America, Vol:Pages:ISSN: Ultrasonic array imaging is widely used to provide high quality defect detection and characterization.

Abstract. Ultrasound has several characteristics which make it well suited for the induction of thermal therapy. These include the feasibility of constructing applicators of virtually any shape and size, and the good penetration of ultrasound at frequencies where the wavelengths are on the order of by: Multiple transducer elements (32 to 64) are located in a circular fashion around the catheter tip.

Unlike the linear phased- array systems, the circular system does not activate all the transducer elements in forming an ultrasound wavefront. Instead, only the trans- ducer elements on the wavefront side of the catheter are activated.

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