COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 4 Issue 1

INTEGRAL SURFACES FOR HYPERBOLIC ORDINARY DIFFERENTIAL EQUATIONS WITH IMPULSES

S.G. HRISTOVA, D.D. BAINOV

The paper considers integral surfaces of systems of differential equations with impulse perturbations at fixed moments of time. Sufficient conditions have been obtained for the…

THE USE OF THE SINGULAR VALUE DECOMPOSITION METHOD IN THE SYNTHESIS OF THE NEUMANN'S BOUNDARY PROBLEM

JAN SIKORA, JERZY SKOCZYLAS, JAN SROKA, STANISLAW WINCENCIAK

This paper discusses an electrostatic, homogeneous field in a uniform two‐dimensional domain with Neumann's boundary conditions. The boundary conditions are known only at some…

THE INFINITE BOUNDARY ELEMENT AND ITS APPLICATION TO THE UNBOUNDED HELMHOLTZ PROBLEM

Y. KAGAWA, T. YAMABUCHI, Y. ARAKI

The combination method, combined finite element‐boundary element approach, is suitable for unbounded field problems. Although this technique attains a high degree of accuracy, the…

CUT‐OFF FREQUENCIES OF QUAD‐RIDGED WAVEGUIDES USED IN THE DESIGN OF MICROWAVE CIRCULAR‐POLARISERS

P. DALY

In microwave radio‐frequency technology, the design of broadband circular polarisers involves the use of waveguides having different propagation velocities for two orthogonal…