ISSN:0272-6343    

DOI:10.1080/02726348608915204

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Frequently in the lightning literature the upper bound on the rate of rise of lightning current of the order of 1011 A/s or a few times this appears. There is currently no theoretical explanation for this limit or the probability distribution around this maximum. In this paper we present a simple theory which establishes the plausibility of this limit in the case of a leader tip. We also compare the results of the basic theory to more complex treatments applied to nuclear lightning.

ISSN:0272-6343    

DOI:10.1080/02726348608915205

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A new method is proposed for the evaluation of the capacity of flat laminae of arbitrary shape. The method is based on an integral representation for the reciprocal distance between two points obtained by the author earlier. Specific approximate formulae are derived for evaluating the capacity of a polygon, a triangle, a rectangle, a rhombus, a circular rector and a circular segment. All the formulae are checked against the solutions known in the literature, and a good accuracy is confirmed. No similar formulae have ever been reported.

ISSN:0272-6343    

DOI:10.1080/02726348608915206

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The occurrence of exponentially increasing instabilities is a common feature of time marching methods for. solving transient scattering problems. In this paper we consider the mechanism by which such instabilities arise and describe various methods of reducing their effect.

ISSN:0272-6343    

DOI:10.1080/02726348608915207

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

It is commonplace to measure the surface divergence of the surface current density on a perfectly conducting object. This is related to the surface charge density, or the normal electric field. This paper explores the measurement or a complementary quantity, the surface curl of the surface current density which can be related to an equivalent magnetic charge density, or the normal derivative of the normal magnetic field. Techniques and difficulties are discussed.

ISSN:0272-6343    

DOI:10.1080/02726348608915208

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

This article presents a method which models printed circuit antennas with very high efficiency. The model is based on a decomposition of the pertinent Green's function, using weighted image theory, into two smooth-valued perturbation terms and a singularity containing term which can be treated analytically. This, in addition to the adoptation of a numerical interpolation technique, leads to minimization of computation time when the method of moments is enforced. An analytic-numeric real axis integration approach is also applied to evaluate the near field quantity of the perturbation terms.

ISSN:0272-6343    

DOI:10.1080/02726348608915209

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0272-6343    

DOI:10.1080/02726348608915210

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor