Electromagnetic Wave Theory and Remote Sensing

Electromagnetic waves are studied with applications to microstrip antennas, 1'2 geophysical subsurface probing,3' 4 scattering from helical structures5 '6 and Smith-Purcell radiation from metallic gratings.7 Radiation and resonance characteristics of two coupled circular microstrip disk antennas are studied rigorously using numerical techniques, matched asymptotic analysis, and the newly developed Hankel transform analysis.1,2 The electromagnetic fields due to dipole antennas in a two--layer dissipative medium is solved using the quasistatic approximation. 3 The solutions in integral forms are calculated with brute force numerical integration methods, the multi-image approach with the steepest descent method, the normal mode approach with the residue method, and a hybrid approach with combinations of the above methods. Electromagnetic wave scattering from helical structures has been studied using the physical optics and modal approaches. The fields scattered by a thin wire helix of finite extent is investigated using physical optics and the geometrical theory of diffraction.5 The geometrical theory of diffraction result is obtained as a high frequency limit of the physical optics approximation by applying the saddle point technique to the integral representation of the physical optics field. The electromagnetic wave scattering by a tape helix of infinite extent is studied by using Floquet wave expansion for its guided modes and scattered fields.6 The Smith-Purcell radiation problem is solved taking into account the penetrable properties of metallic gratings.7 When an electron beam streams across the surface of a metallic grating, emission of electromagnetic radiation occurs. It is shown that maximum radiation occurs when the surface plasmon mode is excited.

[1]  J. Kong,et al.  Physical optics approach for scattering by thin helical wires , 1983 .

[2]  J. Kong,et al.  Modal approach to scattering of electromagnetic waves by a conducting tape helix , 1983 .

[3]  Leung Tsang,et al.  Multiple scattering of acoustic waves by random distribution of discrete spherical scatterers with the quasicrystalline and Percus–Yevick approximation , 1982 .

[4]  J. A. Kong,et al.  Application of strong fluctuation random medium theory to scattering of electromagnetic waves from a half-space of dielectric mixture , 1982 .

[5]  Weng Cho Chew,et al.  Asymptotic approximation of waves due to a dipole on a two‐layer medium , 1982 .

[6]  Leung Tsang,et al.  Effective propagation constants for coherent electromagnetic wave propagation in media embedded with dielectric scatters , 1982 .

[7]  J. Kong,et al.  Smith-Purcell Radiation from a Charge Moving Above a Penetrable Grating , 1983, 1983 IEEE MTT-S International Microwave Symposium Digest.

[9]  J. Kong,et al.  Passive and active remote sensing of atmospheric precipitation. , 1983, Applied Optics.

[10]  J. A. Kong,et al.  Strong fluctuation theory for electromagnetic wave scattering by a layer of random discrete scatterers. [in microwave remote sensing of snow fields] , 1984 .

[11]  Jin Au Kong,et al.  Wave scattering from a periodic dielectric surface for a general angle of incidence , 1982 .

[12]  J. Kong,et al.  Impedance parameters and radiation pattern of two coupled circular microstrip disk antennas , 1983 .

[13]  J. Kong,et al.  Time response of a vertical electric dipole over a two‐layer medium by the double deformation technique , 1982 .

[14]  L. Tsang,et al.  Scattering of electromagnetic waves from a half space of densely distributed dielectric scatterers , 1983 .

[15]  Weng Cho Chew,et al.  Vector Hankel transform analysis of annular-ring microstrip antenna , 1982 .

[16]  J. Kong,et al.  Wave scattering and guidance by dielectric waveguides with periodic surfaces , 1983 .

[17]  A Symptotic Evaluation of Resonant Frequencies for Two Coupled Circular Microstrip Disk Resonators , 1983, 1983 IEEE MTT-S International Microwave Symposium Digest.

[18]  Weng Cho Chew,et al.  MICROSTRIP CAPACITANCE FOR A CIRCULAR DISK THROUGH MATCHED ASYMPTOTIC EXPANSIONS. , 1982 .