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Engineered Materials Abstracts

The growing importance of polymers, ceramics, and composites in a variety of structural and other advanced applications requires the in-depth coverage provided by Engineered Materials Abstracts. Citations taken regard the research, manufacturing practices, properties and applications of these materials. Begun in 1986, Engineered Materials Abstracts is an electronic database containing Ceramics, Composites and Polymers subfiles. EMA is specifically designed to serve materials sciences researchers, engineers and scientists.

Sources covered include over 3,000 periodicals, conference proceedings, technical reports, trade journal/newsletter items, patents, books, and press releases.

Subject Coverage
    Major areas of coverage include:
    • Circuits
    • Components and Materials
    • Photonics
    • Control and Systems
    • Telecommunications
    • Telecommunications Equipment and Instrumentation
    • Power Systems
    • Theoretical
    • Electronics and Communications Milieux
Dates of Coverage
    Approximately 1986-current. The oldest record in the database has a publication date of 1953; about 50% of its records have publication dates of 1993 or later.
Update Frequency
    Once a month. Approximately 20,000 new records are added per year.
    Over 0 records as of May 2013
    The database is indexed using a master authority file of about 40,000 controlled-vocabulary terms. Older records in this database were indexed using a file-specific thesaurus; this thesaurus has now been incorporated into the master authority file.
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Sample Record
    TI: Title
    Input characteristic of tri=plate aperture array antenna
    AU: Author
    Tsukamoto, Katsuya; Arai, Hiroyuki
    AF: Author Affiliation
    Matsushita Electric Works, Ltd, Kadoma, Jpn
    SO: Source
    ELECTRON COMMUN JPN PART I, vol. 79, no. 9, pp. 62-71, 1996
    IS: ISSN
    PB: Publisher
    AB: Abstract
    This paper treats an array antenna excited electromagnetically by a feed probe through holes (aperture elements) on the upper conductor as the radiating element in a tri-plate antenna configuration. The impedance of the feed probe is analyzed by the induced electromotive force (emf) method in the spectral domain with a periodic boundary condition. The results are compared with the measured data. From the numerical results, it is found that an impedance matching between the probe and the radiating elements can be realized by adjusting the probe length and that the resonant condition for the antenna can be determined. Further, it is found that the impedance of the strip line to the feed probe and the impedance of the feed probe determine the input characteristics which become the operating condition of the tri-plate antenna. The analysis results agree well with the measured data so that the validity of the method is confirmed.
    LA: Language
    PY: Publication Year
    PT: Publication Type
    Journal Article
    DE: Descriptors
    Electromagnetic field effects; Probes; Antenna feeders; Electric conductors; Antenna radiation; Boundary conditions; Numerical analysis; Impedance matching (electric); Resonance; Strip telecommunication lines
    ID: Identifiers
    Tri-plate aperture array antenna; Electromagnetic coupling; Feed probe; Electromotive force; Periodic boundary condition; Infinite periodic array
    CL: Classification
    E 716 Electronic Equipment, Radar, Radio and Television; E 701 Electricity and Magnetism; E 704.1 Electric Components; E 921.6 Numerical Methods; E 701.1 Electricity: Basic Concepts and Phenomena; E 931 Applied Physics Generally
    EM: Entry Month
    SF: Subfile
    Electronics & Communications Abstracts
    AN: Accession Number
Field Codes
    The following field codes are found in the records of this database. Here they are listed in alphabetical order by two-letter code. See Field Codes and Search Examples for detailed descriptions and search examples.
    AB = Abstract ML = Materials
    AF = Affiliation NT = Notes
    AN = Accession Number NU = Other Numbers
    AU = Author OT = Original Title
    CF = Conference PA = Patent Application (Date)
    CL = Classification PB = Publisher
    DE = Descriptors PC = Patent Country
    EM = Entry Month PT = Publication Type
    IB = ISBN PY = Publication Year
    ID = Identifier SF = Subfile Name
    IS = ISSN SO = Source
    LA = Language TI = Title
    MC = Material Classifation