Zobrazeno 1 - 10
of 42
pro vyhledávání: '"L.F. Libelo"'
Publikováno v:
IEEE Transactions on Magnetics. 35:1813-1816
Processing of materials at microwave frequencies is made difficult by physical properties that change significantly with temperature. A microwave heating model with material properties that change slowly with time and temperature has been developed.
Publikováno v:
IEEE Transactions on Magnetics. 34:2712-2715
A series of Vlasov-type high power microwave launchers were investigated with several slant-cut angles. Finite element analysis using parallel computation was performed on a cluster of workstations and compared with low-power measurements made on a v
Autor:
R.C. Hansen, L.F. Libelo
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 31:881-890
To avoid dispersion caused by an explicit /spl lambda//sup 2/ in either the one-way, or two-way range equations, the antenna gain product must be proportional to frequency squared. For the one-way case this is equivalent to one antenna with gain inde
Autor:
C.M. Knop, L.F. Libelo
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 37:583-589
The amount of leakage radiation, as well as the radiation pattern and its gain, produced by a complete 360/spl deg/ circumferential-narrow gap cut in a coaxial cable carrying a TEM mode is determined. Leakage levels for such a typical cable of approx
Publikováno v:
IEEE Transactions on Magnetics. 30:3120-3123
Improved beam focusing of high powered microwaves radiating from a Vlasov-type antenna can be achieved by applying a flare to the launcher aperture. A frequency domain two dimensional hybrid finite-boundary element model solves the near field time ha
Autor:
Charles M. Knop, L.F. Libelo
Publikováno v:
IEEE Transactions on Antennas and Propagation. 42:1188-1192
A method employing appropriately placed parallel-metallic plates in the aperture of a TM/sub 01/ mode circular waveguide source so as to have it produce pencil-beam radiation is described and analyzed. Programmed computations, with experimental verif
Publikováno v:
IEEE Transactions on Magnetics. 29:1642-1645
A three-dimensional nodal-based finite element formulation for electric or magnetic fields is presented. The formulation includes open boundary problems and conductor interfaces. The open boundary is modeled using the Engquist-Majda absorbing boundar
Publikováno v:
Journal de Physique III. 2:2101-2114
We present in this paper the modelization of open boundaries microwave problems using Finite Element method, for the design of antennas or for the study of electromagnetic scattering: Finite Element formulation, coupling with Boundary Element Method
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 34:197-205
The suitability of various radiating systems for generating a directive high-power microwave (HPM) beam is considered. It is concluded that offset reflector antenna systems are well suited for this purpose. An HPM reflector antenna may consist of one
Autor:
L.F. Libelo, R. C. Hansen
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 34:206-213
The calculation of near-field fluences of high-power microwave (HPM) antennas is reviewed. Near-fields close to large square or circular antennas are calculated rapidly using the geometric theory of diffraction; one specular and two edge-diffracted r