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Loop Enhanced Passive Source- and Load-Pull Technique for High Reflection Factor Synthesis

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4 Author(s)
Ghannouchi, F.M. ; Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada ; Hashmi, M.S. ; Bensmida, S. ; Helaoui, M.

An original source- and load-pull topology based on a passive technique is presented in this paper. The proposed system consists of passive tuners and loop structures. The use of a passive loop structure in cascade with a passive tuner allows for synthesis of reflection coefficients in the order of 0.97 magnitudes at the device under test's access plane. The measurement and characterization results of a 1W GaAs MESFET device show an improvement of 0.9 dB in the gain and 6% in the power-added efficiency when the proposed impedance synthesis techniques are used.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:58 ,  Issue: 11 )