ISSN:1050-1827    

DOI:10.1002/mmce.4570020402

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

年代:1992

数据来源: WILEY

ISSN:1050-1827    

DOI:10.1002/mmce.4570020403

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis article is a survey of the theoretical background for full‐wave spectral‐domain analysis of open microstrip discontinuities of arbitrary shape. The spectral‐domain dyadic Green's function, which takes into account all the physical effects, such as radiation and surface waves, is used to formulate an electric field integral equation. The method of moments is then employed to find the current distribution on the microstrips, and subsequently, the scattering parameters of the junctions. Since all field components can be expressed in terms of the dyadic Green's function and the current distribution, the losses due to both radiation and surface waves are further determined through a rigorous Poynting vector analysis. To model the discontinuities of arbitrary shape, both rectangular and triangular subdomain functions are used as the current expansion functions in the moment method procedure. In addition, the semi‐infinite traveling wave functions are applied to simulate the feeding structure and isolate individual junction effects. Several examples are demonstrated to illustrate the utility of different techniques in this analysis. Comparison of some numerical results with available experimental data shows excellent agreement. Finally, this approach is most natural for the characterization of 3‐D integrated circuits and the design of printed antennas including excitation circuit effects. © 1992 John Wiley

ISSN:1050-1827    

DOI:10.1002/mmce.4570020404

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

年代:1992

数据来源: WILEY

摘要:

AbstractA combined approach of the finite‐element and boundary‐element methods is formulated for the analysis of arbitrarily shaped discontinuities in a grounded slab waveguide. In this approach, the discontinuity region is divided into two regions. One is a finite region with arbitrary inhomogeneities; the other is a semi‐infinite and homogeneous region. The finite‐element and the boundary‐element methods are applied to the former and the latter regions, respectively, Also, analytical solutions in which both the guided and the radiation modes are taken into account are used for uniform waveguide regions connected to the discontinuity region. To show the validity and usefulness of this approach, computed results are given for several kinds of discontinuities, and some of them are compared with theoretical results previously published. © 1992 John Wiley

ISSN:1050-1827    

DOI:10.1002/mmce.4570020405

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

年代:1992

数据来源: WILEY

摘要:

AbstractAn efficient moment method procedure which utilizes a point matching scheme together with a generalized inverse is formulated and implemented with the use of the singular value decomposition. The integral representation of Green's functions and a combination of semi‐infinite and subdomain expansion functions are used to formulate the numerical technique required to solve for the scattering parameters of planar microstrip multiports. Scattering parameters of typical microstrip discontinuities computed by utilizing this procedure are presented and compared with known published results. © 1992 John Wiley&Sons, I

ISSN:1050-1827    

DOI:10.1002/mmce.4570020406

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

年代:1992

数据来源: WILEY

摘要:

AbstractAn efficient algorithm is presented here for simulating large, passive, microstrip layouts using a circle of influence approach with a full‐wave/integral‐equation‐based numerical solver. The procedure involves dividing the circuit into standard subcomponents or blocks and assigning a circle of influence for each block. Reiving on physical intuition, the computation of the couplings between blocks is then limited to those that fall within the circle. By adjusting the circle size, different orders of parasitic coupling can be included in the simulation process. Local junction effects from the individual blocks and the parasitic couplings between blocks that are in close physical proximity can always be taken into account. Aided by a newly developed graphical user interface, the tradeoff between computational efficiency and accuracy is examined by varying the diameter of the circle of influence. Data are presented to illustrate the effectiveness of this new approach. © 1992 John Wiley&Son

ISSN:1050-1827    

DOI:10.1002/mmce.4570020407

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

年代:1992

数据来源: WILEY

摘要:

AbstractA mixed‐potential, spatial‐domain integral equation approach is used to model the coupling and junction effects when microstrip structures in two different layers of a common substrate are crossing each other. A Galerkin method, together with the so‐called pseudo‐mesh current distribution for the basis functions, is then applied to accurately characterize multiport junctions. As an example, a four‐port crossover of two microstrip transmission lines is characterized in terms of the S‐parameters. © 1992 John Wil

ISSN:1050-1827    

DOI:10.1002/mmce.4570020408

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis article reviews an integral equation technique to efficiently solve printed structures consisting of conducting patches, slots, and ground planes residing in a stratified medium. The integral equation is cast into a mixed potential form and solved in the space domain. Both the electric and magnetic surface currents are considered as general two‐dimensional surface currents with no prescribed or preferred direction. Thus, arbitrary shapes for patches and slots can be considered. After the formulation in the space domain, the integral equation is solved using the method of moments. Theoretical results are compared with measurements for three structures. These structures are: a wide slot antenna excited by a microstrip line; a microstrip line‐slot line‐microstrip line transition; and transitions between microstrip lines embedded at different levels of a multilayered media. © 1992 John Wiley&Son

ISSN:1050-1827    

DOI:10.1002/mmce.4570020409

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

年代:1992

数据来源: WILEY

摘要:

AbstractThe spectral domain integral equation approach is employed for the characterization of passive microstrip circuits that cannot be analyzed using the traditional lumped‐circuit‐based approach. General planar and certain three‐dimensional structures such as vias and air bridges are analyzed using the presented technique. Spurious mode coupling and the effect of the microwave housing on circuit performance are also investigated. © 1992 John Wiley&Son

ISSN:1050-1827    

DOI:10.1002/mmce.4570020410

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

年代:1992

数据来源: WILEY

摘要:

AbstractSimple and complex suspended stripline discontinuities are precisely characterized using the modal analysis combined with the spectral domain approach. Frequency‐dependent equivalent circuits for the studied discontinuities are derived. They can be used as data base for microwave CAD programs. Using the results of this study, a directional coupler, different resonators and a low‐pass filter are realized in this suspended stripline technology. Experimental performance of these components validates our theoretical results. © 1992 John Wiley&Sons,

ISSN:1050-1827    

DOI:10.1002/mmce.4570020411

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

年代:1992

数据来源: WILEY