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Conference Papers Year : 2023

Ultra-Low Loss Slot-Line Based Common Mode Isolator


In this paper, a low-loss balanced microstrip common-mode (CM) isolator based on slot lines is proposed. Two microstrip-driven signals in opposite phase are combined into a slot line with a special geometry. Placed back-to-back, this configuration provides a good balanced-microstrip to balanced-microstrip common mode isolation. A transmission line CM model is proposed. Measurement results show −22dB of commonmode rejection as well as a differential mode (DM) insertion loss as low as −0.15dB at 2.45 GHz. This low loss structure is of particular interest for balanced feed structures using two out of phase unbalanced amplifiers.
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hal-04500603 , version 1 (12-03-2024)



Timothee Le Gall, Anthony Ghiotto, Stefan Varault, Bruno Louis, Grégoire Pillet. Ultra-Low Loss Slot-Line Based Common Mode Isolator. 2023 53rd European Microwave Conference (EuMC), Sep 2023, Berlin, Germany. pp.58-61, ⟨10.23919/eumc58039.2023.10290232⟩. ⟨hal-04500603⟩
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