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  • 1
    Electronic Resource
    Electronic Resource
    Erratum: "The propagation of a radar pulse in sea water'' [J. Appl. Phys. 73, 1581 (1993)] (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 3586-3587 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359613
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  • 2
    Electronic Resource
    Electronic Resource
    The propagation of a radar pulse in sea water (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 1581-1590 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The propagation in sea water of an electromagnetic field in the form of a semi-infinite wave train or a radar pulse generated by an electric dipole is investigated analytically for low frequencies. The frequency-domain formula for the downward-traveling field of a horizontal electric dipole excited by a sinusoidally modulated electric-current pulse is Fourier transformed to obtain an explicit expression for the field at any distance in the time domain. Specific application is made to a wave packet of 25.5 cycles in a time duration of 1 s. The amplitude and phase velocity of the wave packet are determined together with the amplitudes of the initial and final transients. Graphs are displayed and discussed for a range of distances; these show that the amplitude of the wave packet decays more rapidly than the amplitudes of the transients. Possible application to remote sensing in the ocean is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353216
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  • 3
    Electronic Resource
    Electronic Resource
    Currents and electric fields induced in the human body when the arms are raised (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 7116-7128 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The current induced in the human body when exposed to an incident electromagnetic field with the electric vector parallel to the length of the body and the magnetic field perpendicular to the chest was determined in an earlier study with the arms in close contact with the body. The analysis is now extended to the case when both arms are raised by an arbitrary angle. Formulas are derived for the current in the arms and the body when the latter is far from the earth, when it is barefoot on wet earth, and when it is standing on the earth with rubber-soled shoes. The current in the arms is shown to consist of two parts, that induced by the component of the incident electric field parallel to the arms and that generated in them by their connection to the body. The current in the body is significantly increased as the arms are raised. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365308
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  • 4
    Electronic Resource
    Electronic Resource
    The complete electromagnetic field of a three-phase transmission line over the earth and its interaction with the human body (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 668-683 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electromagnetic field at all points near a high-voltage transmission line is determined in analytical form. Account is taken of the presence of the earth below the three-wire, three-phase power line. The electric and magnetic fields, the total axial current, and the current and power densities in the interior of a human body are determined when the body is standing on the ground under or near the line, is in an elevated basket under the line, or is reclining in bed near the height of the line. The fields are very weak and the current and power densities so small that thermal effects are ignorable, but not necessarily possible effects on nerve action, the functioning of cells, or on certain secretions. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360325
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  • 5
    Electronic Resource
    Electronic Resource
    The electromagnetic field of a horizontal electric dipole in the presence of a three-layered region: Supplement (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 4845-4848 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electromagnetic field generated by a horizontal electric dipole in the air over a dielectric-coated conducting or dielectric half-space is evaluated in an earlier paper subject to the conditions k20(very-much-less-than)k21(very-much-less-than)||k22|| on the wave numbers of the three regions and the condition k1l≤ 0.6 on the thickness l of the dielectric layer. Unintentionally, the severe condition ||k2 l||2(very-much-less-than)1 was also imposed in the determination of the field in the dielectric layer and the half-space below it. That restriction is removed in this paper and new complete formulas are derived which have wide potential application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354313
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  • 6
    Electronic Resource
    Electronic Resource
    The resonant circular array of electrically short elements (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 431-439 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Different resonant distributions of current in circular arrays with N=60, 72, and 90 elements are investigated theoretically with the method of symmetrical components and a two-term representation of current in each element. The arrays studied have only one driven element. The remarkable results—which are displayed in a sequence of graphs—indicate that the relative currents in the elements can be distributed in triplets, triplets alternating with singlets, two independent sets of singlets, or one set of singlets. The driving-point impedance of this last distribution is a pure resistance, the Q of the 90-element array is over 30 000, and the half-power beamwidth of each of the 90 sharp peaks in the power pattern is 2°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346839
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  • 7
    Electronic Resource
    Electronic Resource
    Electric currents and fields induced in cells in the human brain by radiation from hand-held cellular telephones (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 893-900 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: After a review of recent work on the interaction of electromagnetic fields from cellular telephones with the human head, the structural and radiating properties of two common types of transceivers are determined. These include the impedance and current amplitude distribution of the antennas. The tangential electric field maintained by the antennas on the adjacent surface of the head is next determined. From this, the electric field propagating through the skull into the brain is analyzed and, from it, the electric field in spherical and long cylindrical cells is determined. It ranges from 27 to 13.5 V/m in the first 3 cm inside the skull. Of interest is the fact that the induced field in the interior of all cells, regardless of their shape, is the same as the incident field in the brain. It is hoped that biomedical scientists will review these results and determine possible biological effects. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371958
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  • 8
    Electronic Resource
    Electronic Resource
    Spherical lens as a launcher of electromagnetic missiles (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4036-4040 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A uniform dielectric sphere, under transient excitation by a point source, is found to be capable of launching an electromagnetic missile, i.e., there is a direction where the decay of the total energy transmitted to a receiver is slower than r−2. The conditions for the presence of an electromagnetic missile have a natural interpretation, which in turn leads to a classification of electromagnetic missiles according to the singularities of differentiable maps in two dimensions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339115
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  • 9
    Electronic Resource
    Electronic Resource
    Generalized analysis of the spherical lens as a launcher of electromagnetic missiles (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 5647-5653 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is found that, like the directly transmitted radiation field previously investigated, an internally multiply reflected radiation field can also become an electromagnetic missile under certain different electromagnetic-missile conditions. The analysis is carried out in a general way, i.e., for the point source located either inside or outside the dielectric sphere. The electromagnetic-missile conditions are obtained for general multiply reflected radiation fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340347
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  • 10
    Electronic Resource
    Electronic Resource
    Lateral electromagnetic pulses generated by a vertical dipole on the boundary between two dielectrics (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4345-4355 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An exact solution in terms of elementary functions is obtained in the time domain for the vertical electric field Ez(ρ,t) and the transverse magnetic field Bφ(ρ,t) of a dipole located on the plane boundary z=0 between air (region 2, z〈0) and a perfect dielectric (region 1, z〉0) when the dipole is excited by a single delta-function current pulse. The vertical electric field on the boundary consists of a delta-function pulse that travels in the air with the velocity c, an oppositely directed delta-function pulse that travels in the dielectric with the smaller velocity c/ε1/2, an amplitude structure that varies in time between the two pulses, and a final static electric field due to the charges left on the dipole. The horizontal magnetic field is similar. For comparison, the vertical electric field in the equatorial plane of the same dipole in a homogeneous dielectric is also derived. The comparison indicates that the field along the boundary is a surface-wave or lateral pulse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339067
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