摘要:

AbstractNumerical algorithms are utilized to design nontraditional transversal sections of TEM cells, leading to large areas of almost uniform electric field within small dimensions. Numerical inversion of the Schwarz‐Christoffel formula and predictor‐corrector mapping of equipotential lines are, utilized. © 1994 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650070102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe fundamental limit in transmission distance, associated with the Gordon‐Haus timing jitter, is evaluated for an optical‐fiber pulse position modulation (PPM) soliton system. We demonstrate that soliton PPM is more susceptible to this type of timing jitter and that the maximum span length is limited to 65% of that of an equivalent soliton PCM system. © 1994 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650070103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractEigenmodal decomposition formulations are given for numerical solutions of the finite‐difference time‐domain (FDTD) and the transmission‐line‐matrix (TLM) methods. Instead of direct simulation with these time‐recursive schemes, the analysis involves two steps: (1) solving an eigenvalue problem, and (2) analytically constructing the numerical solutions in terms of the eigenvalues and eigenvectors. The numerical solution at any time step can be obtained with only O(N) computation once the corresponding eigenvalue problem has been solved. The main advantage of this technique is that the eigenvalues and eigenvectors for a problem can be stored, the numerical solutions then quickly processed with the stored data. In addition, high‐frequency numerical noise can be reduced simply by discarding the related high‐frequency modes. © 1994 John W

ISSN:0895-2477    

DOI:10.1002/mop.4650070104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractWe report three novel formulas for representing any component of a plane‐wave front, in terms of known orthogonal functions, which describe the space variations as well as the angular variations. © 1994 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650070105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThis article presents a new numerical procedure involving the use of orthogonal polynomials in a Rayleigh‐Ritz procedure to investigate the wave propagation characteristics of uniform hollow conducting waveguides of polygonal cross section. As examples of the applicability of the new functions, the TM modes in metallic waveguides of rectangular and triangular cross sections have been studied. © 1994 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650070106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractA rectangular microstrip patch antenna is electromagnetically excited by microstrip line, but fed from the short side. The effect on the radiation pattern of variation of the feedline inset/off set position is studied experimentally. It is observed that the radiation pattern has two distinct lobes with variable, asymmetric amplitudes. The angle between the two lobes is found to be about 95° ± 10°. But the lobe amplitudes show a periodic variation with normalized inset for each offset value. © 1994 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650070107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractIn this article the method of lines combined with the generalized spectral‐domain immittance approach is used as a full‐wave analysis to the general structure of coplanar waveguides. Numerical examples show the validity of this new method. It can also be used to analyze multilayered or multiregion structures. © 1994 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650070108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractIn this article, the time‐domain impedance boundary condition (TDIBC) used for a thin layer coating over perfect conductors is obtained for the case of an oblique incident parallel‐polarization plane wave. Discretization of the TDIBC to efficiently handle the thin‐layer coating is presented in the context of the time‐domain finite‐difference (TDFD) technique. The TDFD solutions using our TDIBC are in good agreement with the analytical results. © 1994 John Wiley

ISSN:0895-2477    

DOI:10.1002/mop.4650070109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe Boundary integral method (BIM) is applied to a number of planar microstrip multiport junctions. The E fields for coupling ports are expressed as multimode series, enabling direct calculation of S parameters from the resulting matrix equation. Results obtained for cross junctions, T junctions, Y junctions, and 90° bends agree very well with those obtained from full‐wave analysis and other methods. © 1994 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650070110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY

摘要:

AbstractThe boundary value problem of an elliptical chirowaveguide is rigorously formulated by constructing the elliptical cylinder vector wave functions. Influence of chirality parameter both on the propagation axial constant and on the attenuation constant, are illustrated for the first several modes. © 1994 John Wiley&Sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650070111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1994

数据来源: WILEY