1. A Tunable Transmission Line With Controllable Phase Shifting and Characteristic Impedance.
- Author
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Ren, Han, Zhou, Mi, Gu, Yixin, and Arigong, Bayaner
- Abstract
Tunable transmission lines have a high demand in the 5G wireless communication applications. In this brief, a novel transmission line is presented to control both electrical length and characteristic impedance individually, creating flexible functions. For the first function, the proposed transmission line can perform as a tunable phase shifter with 90° phase tuning range and a low insertion loss variation. For the second function, the proposed transmission line can tune the characteristic impedance from 23 Ω to 145 Ω with a fixed phase delay. The ABCD-matrix method is applied to derive the design equations. For the practical implementation, the varactor equivalent parasitic resistances are considered, and the even-odd mode is applied to re-optimize the proposed two tuning functions. To verify the design theory, an experimental prototype is simulated, fabricated, and measured. Both simulation and measurement results match well with the design theory. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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