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Novel lumped-element uniplanar transitions

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2 Author(s)
Yo-Shen Lin ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Chun Hsiung Chen

Novel reduced-size lumped-element uniplanar transitions are proposed, using the planar parallel and series inductor-capacitor (LC) circuits to realize the effective open and short circuits, respectively. In this study, various compact lumped-element coplanar waveguide-to-slotline and finite-ground coplanar waveguide-to-coplanar stripline transition structures are developed and carefully examined. Specifically, the performance of proposed basic lumped-element transitions can easily be adjusted through the control of L and C values, while the design of lumped-element Marchand-balun-type transitions may be accomplished by the use of conventional filter synthesis techniques. Simple equivalent-circuit models are also established, from which the passband behavior of the lumped-element transition structures may be characterized

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:49 ,  Issue: 12 )