Approach for evaluating effects of wall losses on quarterwave shortcircuit impedance standards
Abstract
The conservation of energy principle and firstorder perturbation theory have been applied to obtain formulas for the physical lengths and reflection coefficient magnitudes of quarterwave coaxial and rectangular waveguide shortcircuit impedance standards. The expressions for the physical lengths ensure zero phase angle at the mating interface when wall losses are present. The method can be extended to include small dielectric and magnetic losses, and requires only knowledge of the lossfree solutions. It can also be applied to other waveguiding structures which support uncoupled modes.
 Publication:

IEEE Transactions on Microwave Theory Techniques
 Pub Date:
 November 1985
 DOI:
 10.1109/TMTT.1985.1133180
 Bibcode:
 1985ITMTT..33.1106S
 Keywords:

 Coaxial Cables;
 Electrical Impedance;
 Rectangular Waveguides;
 Short Circuits;
 Standards;
 Transmission Loss;
 Microwave Transmission;
 Perturbation Theory;
 Phase Shift;
 Poynting Theorem;
 Reflectance;
 Walls;
 Electronics and Electrical Engineering