QuickWave
software for electromagnetic design
Designed by Janusz Rudnicki
Updated: March 21, 2008
QW-V2D
QuickWave-V2D, further also referred by an abbreviation QW-V2D, utilises the conformal FDTD method in a vector two-dimensional formulation, expressed in cylindrical coordinates. It incorporates a range of unique models for curved boundaries, media interfaces, modal excitation, and parameter extraction. Unique on the maket and ultra fast vector 2D electromagnetic solver is applicable to the analysis of axisymmetrical devices (which are also called bodies of revolution) as large as 300 wavelength. Hundreds times faster than brute force 3D analysis.
It has been proven [7] that the structures, which maintain axial symmetry of boundary conditions, belong the class of vector two-dimensional (V2D) problems. The total electromagnetic field in such structures can be decomposed into a series of orthogonal modes, of different angular field dependence of the cos(nPhi) or sin(nPhi) type, where Phi is angular variable of the cylindrical coordinate system and n=0,1,2… Each n-mode is analysed separately in QW-V2D. Under such assumptions the numerical analysis can be conducted in two space dimensions, over one half of the long-section of the structure, with n predefined as a parameter. Let us note that the n-mode defined above should not be confused with one mode of a circular waveguide. For example, one QW-V2D analysis with n=1 takes into account a composition of all circular waveguide modes TE1k and TM1m where k and m are arbitrary natural numbers.
QW-V2D can handle a variety of practical problems including:
It has been proven [7] that the structures, which maintain axial symmetry of boundary conditions, belong the class of vector two-dimensional (V2D) problems. The total electromagnetic field in such structures can be decomposed into a series of orthogonal modes, of different angular field dependence of the cos(nPhi) or sin(nPhi) type, where Phi is angular variable of the cylindrical coordinate system and n=0,1,2… Each n-mode is analysed separately in QW-V2D. Under such assumptions the numerical analysis can be conducted in two space dimensions, over one half of the long-section of the structure, with n predefined as a parameter. Let us note that the n-mode defined above should not be confused with one mode of a circular waveguide. For example, one QW-V2D analysis with n=1 takes into account a composition of all circular waveguide modes TE1k and TM1m where k and m are arbitrary natural numbers.
QW-V2D can handle a variety of practical problems including:
| · | calculations of radiation patterns, gain, radiation efficiency, and return loss of axisymmetrical antennas of various types (horn, rod, biconical), rigorously taking into account irregular geometry, complicated corrugations, and inhomogeneous filling |
| · | calculations of radiation patterns and radiation resistance of small dipole or loop radiators, located at the axis of the cylindrical coordinate system |
| · | accurate S-parameter calculations of circular waveguide discontinuities, also in cases involving strong dispersion and multimodal propagation |
| · | determination of eigenfrequencies, Q-factors, and pure modal field patterns for shielded and open inhomogeneous axisymmetrical resonators, also in cases involving closely-spaced modes or whispering gallery modes |
| · | calculation of heating patterns and specific absorption rate in axisymmetrical bodies |
QW-V2D has been implemented on the basis of QW-3D, a three-dimensional simulation package by QWED, and a winner of the European Information Technology Prize in 1999. Thus, QW-V2D takes full advantage of the graphical user interface and modern programming techniques employed and validated within QW-3D. Moreover, the user experienced with either QW-V2D or QW-3D will find the operation of the other package straightforward.