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Title: Two-Tone Excited Hybrid-Coupler-Based Intermodulation Generator for High-Isolation Wireless Sensing Applications
Authors: Yin, Y.
Qi, H.-B.
Wang, R.-Y.
Ngo, T. 
Zhang, H.
Keywords: Hybrid coupler
schottky diodes
two tones
wireless sensing
Issue Date: 2020
Publisher: Institute of Electrical and Electronics Engineers Inc.
Citation: Yin, Y., Qi, H.-B., Wang, R.-Y., Ngo, T., Zhang, H. (2020). Two-Tone Excited Hybrid-Coupler-Based Intermodulation Generator for High-Isolation Wireless Sensing Applications. IEEE Access 8 : 212509-212514. ScholarBank@NUS Repository.
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
Abstract: An intermodulation generator is designed and presented with integration of a hybrid coupler and two identical Schottky diodes (i.e., D1 and D2). The connection polarities of D1 and D2 to the direct and coupled ports of hybrid coupler are opposite for its rapid realization of balanced intermodulation generation. Due to the superior coupling characteristics of hybrid coupler, it can distribute an incident two-tone signal to the direct and coupled ports evenly for D1 and D2, and deliver the balanced intermodulation generations to the isolation port highly insulated from its incident port. Two identical quarter-wavelength shorted stubs at the fundamental frequency are implemented by suppressing the second-order spectrums for an enhancement of the balanced intermodulation generations. Both theoretical analysis and experiments validate the presented intermodulation generator design, which can highly isolate its incidences (the two tones) and outputs (the intermodulation generations) for the future high-isolation wireless sensing applications. © 2013 IEEE.
Source Title: IEEE Access
ISSN: 21693536
DOI: 10.1109/ACCESS.2020.3041354
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
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