Title :
Universal formula for frequency-dependent coaxial open-end effect
Author :
Chramiec, J. ; Piotrowski, J.K.
Author_Institution :
Fac. of Electron., Telecommun. & Inf., Tech. Univ. Gdansk, Poland
fDate :
8/19/1999 12:00:00 AM
Abstract :
An approach used to compute the frequency-dependent equivalent capacitance of a coaxial open-end radiating into a circular waveguide below the cutoff frequency is outlined. Formulas approximating the obtained numerical results are given. These permit direct evaluation of the considered discontinuity with an average error not exceeding 2% in the characteristic impedance range 30-70 Ω and 5% for the remaining characteristic impedance values in the range 10-100 Ω
Keywords :
capacitance; circular waveguides; coaxial cables; electric impedance; waveguide discontinuities; characteristic impedance range; circular waveguide; coaxial open-end effect; discontinuity; frequency-dependent equivalent capacitance; numerical results; universal formula;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990978
