Title :
Comments on "Design Equations for an Interdigitated Directional Coupler" [Letters]
Abstract :
In the above short paper, Ou derived some design equations for interdigital couplers. The purpose of this letter is to point out a limitation which may not be apparent upon reading the above work.
Keywords :
Attenuation; Capacitance; Couplings; Dielectrics; Directional couplers; Equations; Gunn devices; Microstrip; Microwave theory and techniques; Strips;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1976.1128923
