Being characteristic measuring method of the directional coupler which measures degree of coupling of the said directional coupler and directivity by measuring

摘要

PROBLEM TO BE SOLVED: To reduce the error included in directionality and degree of coupling, obtain it with complex number and clarify the phase relationship between the directionality and the degree of coupling.;SOLUTION: By using an impedance terminator of (n) kinds or more (n≥3) generating a reflection wave, a progressive wave voltage Vs and a reflection wave voltage Vr and the phase relationship between output voltages vs and vr of the directional coupler and that between Vs and Vr are known. So the reflectivity Γ (=Vr/Vs) in the directional coupler and the input impedance in the directional coupler is calculated and the impedance Zp of a reaction vessel can be monitored.;COPYRIGHT: (C)2002,JPO