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• W2914244877 startingPage "1402" @default.
• W2914244877 abstract "This paper presents a tunable reflection/transmission coefficient (TRTC) circuit based on a 45° hybrid coupler that is potentially useful for leakage cancelation purposes. The analysis of the proposed TRTC circuit shows that the circuit can cover any reflection/transmission coefficient of less than 0.5 on the Smith chart by adjusting only two variable resistors. Meanwhile, the real and imaginary parts of the reflection/transmission coefficient can be tuned independently, facilitating the use of this circuit in feedback systems. To implement the 45° hybrid coupler used in the proposed TRTC circuit, a new wideband planar topology for arbitrary phase and amplitude hybrid coupler is introduced. The circuit is analyzed and closed-form derivations for designing the proposed hybrid coupler are extracted. A prototype of the proposed 45° hybrid and TRTC circuits are fabricated and measured on 1.6-mm FR-4 PCBs at 1 GHz. The measurement results show a fractional bandwidth of 50% for the proposed 45° hybrid and a coverage radius of larger than 0.3 on the Smith chart in a frequency range of 0.8-1.2 GHz for the proposed TRTC circuit, which are well matched to the simulation results." @default.
• W2914244877 created "2019-02-21" @default.
• W2914244877 creator A5015430564 @default.
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• W2914244877 date "2019-04-01" @default.
• W2914244877 modified "2023-10-08" @default.
• W2914244877 title "A Tunable Reflection/Transmission Coefficient Circuit Using a 45° Hybrid Coupler With Two Orthogonal Variables" @default.
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• W2914244877 doi "https://doi.org/10.1109/tmtt.2019.2895578" @default.
• W2914244877 hasPublicationYear "2019" @default.
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