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A Pair of Ultra-Wideband Planar Transitions for Phase Inversion Applications

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3 Author(s)
Young-Gon Kim ; Sch. of Electr. Eng. & Comput. Sci., Kyungpook Nat. Univ., Daegu, South Korea ; Sun-Young Song ; Kang Wook Kim

A pair of planar transitions which produce ultra-wideband (UWB) in-phase and inverted-phase signals has been developed for phase-inversion circuit applications. The two similar transitions consist of three transitional structures between microstrip line, coplanar waveguide, and parallel stripline. The proposed transitions offer design flexibility in achieving a wide range of impedances with various substrates. The implemented transitions provide low insertion loss, good impedance matching, and UWB performance from 2.1 to over 25 GHz within ±5° phase difference from 180°.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:20 ,  Issue: 9 )