摘要:

This paper begins with an explanation of two approaches for analyzing conformal arrays: the circuit and the scattering approaches. We next review ray techniques for calculating the self and mutual admittances of slot arrays on a conducting cylinder or cone by presenting (i) final formulas for admittance under various conditions, and (ii) representative numerical results and their comparison with experimental data.

ISSN:0272-6343    

DOI:10.1080/02726348208915159

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Using the compensation theorem integral formulation,the radiationpatterns of a verticalel ectric dipolenearal and-sloping beach-sea boundaryare investigated numerically.Since the formulation invokes the surfaceimpedance concept,the surface impedance along the sloping beach is calculatedusing parallel two-layer stratified media theory.The transition of thesurface impedance of the land to that of the sea is found to take placeoverasmall fraction of a free space wavelength from the shoreline,so the slopingbeach behaves very much like anabrupt boundary.The additional losses of thesloping beach,compared to an abrupt land-sea boundary,tend to reduce theradiation field slightly at low elevation angles and enhance the field slightlyat higher angles.Allowing fora “wet” beach in the immediate foreground ofthe shoreline has a converse effect.

ISSN:0272-6343    

DOI:10.1080/02726348208915160

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

An Integro-differential equation is formulated for the problem of TM illumination of an infinite slot in a conducting screen situated between two dielectric slabs having different electromagnetic properties. Numerical results are given for the slot tangential electric field (or equivalent magnetic current) for selected cases where the slab exists only on the shadow side of the screen. Far-zone magnetic fields are computed by a method combining numerical and analytical techniques and are presented for several cases.

ISSN:0272-6343    

DOI:10.1080/02726348208915161

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The sequential approach to distribution theory is used to rigorously derive the expression, which remains valid in the source region, for electric field in terms of the electric dyadic Green's function. Sufficient conditions for the behavior of the current density that insure that the electric field obeys Maxwell's equations are determined explicitly.

ISSN:0272-6343    

DOI:10.1080/02726348208915162

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

In this paper a criterion is established for the minimum distance of separation between the probe antenna and the test antenna that would result in accurate spherical near-field antenna measurements possible without probe correction. This criterion is arrived at by considering two different types of test antennas and calculating their near-fields with and without directivity of the scanning probe.

ISSN:0272-6343    

DOI:10.1080/02726348208915163

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor