Reply to Comments on "An Analytical Design Method for a Novel Dual-Band Unequal Coupler With Four Arbitrary Terminated Resistances " | IEEE Journals & Magazine | IEEE Xplore

Reply to Comments on "An Analytical Design Method for a Novel Dual-Band Unequal Coupler With Four Arbitrary Terminated Resistances "


Abstract:

The phase-difference performance at two desired frequencies of the generalized dual-band unequal coupler is discussed and presented in this comment as supplementary infor...Show More

Abstract:

The phase-difference performance at two desired frequencies of the generalized dual-band unequal coupler is discussed and presented in this comment as supplementary information. The condition of {∠S21 - ∠S31}f1 + {∠S21 - ∠S31} f2 = π and the analytical equations for {∠S21 - ∠S31} f1 or f2 are provided. It can be concluded that the dual-frequency output phase differences are constant and equal to 90° when R2 = R3, but the values of R1 and R4 can be varied. Finally, the calculated results show that the phase-difference variations about ±11% in the whole useful bandwidths of these branch-line couplers are objective and acceptable in common practical applications when R2 and R3 are in the range of 30-100 Ω (R2 ≠ R3).
Published in: IEEE Transactions on Industrial Electronics ( Volume: 65, Issue: 5, May 2018)
Page(s): 4424 - 4427
Date of Publication: 06 October 2017

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