Precise Calculation of the Dispersion and Coupling Impedance of Tape Helix
螺旋带色散特性和耦合阻抗的精确计算

An improved method for evaluating the dispersion and coupling impedance of a tape helix is utilized.The assumption about the surface current density distribution on the tape is avoided by expanding it in a series ofChebyshev polynomials.The propagation matrix and jump matrix are introduced when the dielectric layer isstratified.A program has been written to analyze some typical examples.It is found that the results obtained bycomputing and measuring agree to good accuracy.The maximal orders of spatial harmonic and Chebyshevexpansion can be specified to ensure the convergence of the results.The number of the stratified dielectric dependson the degree of radial uniformity:the more uniform the dielectric,the less the number.