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2026-04-30
Fixed-Condition Spoof Plasmonic Parametric Amplifier for Multi-Carrier Signals
By
Progress In Electromagnetics Research, Vol. 185, 49-56, 2026
Abstract
To achieve synchronous and uniform amplification of dense multi-carrier signals, this paper proposes a multi-frequency nondegenerate parametric amplifier (PA) based on a nonlinear spoof surface plasmon polariton (SSPP) waveguide. By engineering the dispersion characteristics of a varactor-diode-loaded waveguide, we realize an SSPP platform that exhibits minimized phase mismatch for three distinct signal-idler pairs under a constant pump frequency (13.348 GHz) and a fixed bias voltage. Experimental results show that the amplifier delivers highly uniform gains exceeding 20 dB for three closely spaced carriers at 6.363, 6.489, and 6.549 GHz, effectively emulating a three-frequency-shift keying (3FSK) signal. This work demonstrates a fixed-condition amplification scheme that requires no dynamic tuning, offering a promising solution for amplifying densely spaced carriers in integrated communication systems.
Supplementary Information
Citation
Wenyi Cui, Yue Cen, and Jingjing Zhang, "Fixed-Condition Spoof Plasmonic Parametric Amplifier for Multi-Carrier Signals," Progress In Electromagnetics Research, Vol. 185, 49-56, 2026.
doi:10.2528/PIER26021102
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