Reply to ‘Comments on “A Dual-Frequency Transformer for Complex Impedances With Two Unequal Sections”’

Dr. Roy points out that the proposed method presented is not valid when the complex impedances Zo and ZL change at the two different frequencies. Although the constant complex impedance is considered, the assumption is reasonable to a certain extent and the design method is useful in common frequency-dependent microwave circuits.In general, for the complex frequency-dependent impedances, when the relative variation of |Zxf1-Zxf2|/|Zxf1(x=o, L.) is in the range of 0% ~ 10%, our design method is also useful in practical microwave circuits.