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The Transmission-Line Matrix (TLM) method, originated by Johns and Beurle [1] is based on equivalent circuit models of Maxwell's equations and has been used extensively to analyze electromagnetic field problems [2]. In this paper the application of the TLM method to two dimensional electromagnetic scattering problems is investigated. The configuration of the mesh is the same as that used in Finite-Difference...
The Transmission-Line Matrix (TLM) method, originated by Johns and Beurle [1] is based on equivalent circuit models of Maxwell's equations and has been used extensively to analyze electromagnetic field problems [2]. In this paper the application of the TLM method to the simulation of radiation and scattering problems, in which there is a plane interface separating two infinite homogeneous media, is...
This paper investigates a novel multi-segment dielectric resonator antenna (DRA). The antenna consists of a thin segments of different permittivity material bonded to the underside of a rectangular dielectric resonator segment. The multi-segment DRA element is excited by a microstrip line. The permittivity and thickness of the segments are used to concentrate the fields of the micro-scrip line and...
In this paper, the cut-off frequency of the dominant mode of a finned waveguide is computed using the Symmetric Condensed Node Transmission Line Matrix (SCN-TLM) and Finite Volume Time Domain (FVTD) methods. The cut-off frequencies are computed for various sizes of fins as well as fine and coarse meshes. The values of the cut-off frequencies are obtained and compared with each other and with a benchmark...
Introduces an absorbing boundary condition for use with TLM simulations of open region field problems. The method is based on the wave impedance of a plane wave crossing an observation plane at an arbitrary angle, and is coupled to an algorithm to predict this angle. The impedance applied to the mesh boundary varies with the changing field distribution and is therefore referred to as a variable impedance...
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