X. Liu, C. Geng, X. Guo, K. Kolpatzeck, L. Häring, J. Balzer, A. Czylwik
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Design and Characterization of 3D Printed Polymer Terahertz Multi-Mode Interference Couplers
In this paper, we present the design of one-dimensional symmetric and paired $1\times 2$ multi-mode interference (MMI) couplers at 140 GHz applying a modal propagation analysis together with electromagnetic simulation. The designed couplers are fabricated by 3D printing and are characterized by terahertz frequency-domain spectroscopy. The measured amplitude imbalances between the outputs of the couplers are as good as 0.32 dB.
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