Title :
Coupling factor for 0° asymmetric nonuniform line couplers
Author :
Villotte, J.P. ; Garault, Y.
Author_Institution :
Université de Limoges, Faculté des Sciences, Laboratoire d´Ã\x89lectronique et Microöndes, Limoges, France
Abstract :
The phase difference between the coupled outputs is calculated in a 2nd-order approximation for asymmetric nonuniform line couplers. This result permits one to propose an even-mode characteristic-impedance variation for the design of a 0° coupler, which is more easily computable than the Klopfenstein taper previously used.
Keywords :
coupled circuits; transmission line theory; 0 degree asymmetric nonuniform line couplers; Klopfenstein taper; coupling factor; eigenmode characteristic impedance; phase difference;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19750158
