Title :
Perturbations of the Critical Parameters of Quarter-Wave Directional Couplers (Correspondence)
Keywords :
Couplings; Directional couplers; Equations; Frequency; Geometry; Impedance; Microstrip; Scattering; Transmission line theory; Voltage;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1967.1126481
