Results 121 to 130 of about 832 (152)

Hybrid equivalent circuit-deep neural network design of optically transparent metasurface with microwave RCS reduction. [PDF]

iScience
Si L, Ma T, Dong L, Niu R, Dang C, Bao X, Zhu K, Sun H, Zhu W.   +8 more
europepmc   +1 more source

Joint communication and sensing with structured beams carrying orbital angular momentum. [PDF]

Nat Commun
Shen R, Ghasempour Y.
europepmc   +1 more source

Low-noise frequency synthesis and terahertz wireless communication driven by compact turnkey Kerr combs. [PDF]

Nat Commun
Jia K, Cai Y, Yi X, Qin C, Zhao Z, Wang X, Liu Y, Zhang X, Cheng S, Jiang X, Sheng C, Huang Y, Yu J, Liu H, Jin B, You X, Zhu SN, Liang W, Zhu M, Xie Z.   +19 more
europepmc   +1 more source

Radar-Based Detection of Obstructive Sleep Apnea: A Systematic Review and Network Meta-Analysis of Diagnostic Accuracy Across Frequency Bands. [PDF]

Diagnostics (Basel)
Tran NBMH, Tran TQT, Tsai CY, Kang JH.
europepmc   +1 more source

Grounded L-Shaped Corner-Embraced Patch Array Polarization Conversion Metasurface Compatible with Multiband and Broadband Characteristics. [PDF]

Micromachines (Basel)
Kong S, Zhang Y, Fu Z, Yang R.
europepmc   +1 more source

Multimode Switching Broadband Terahertz Metamaterial Absorbing Micro-Devices Based on Graphene and Vanadium Oxide. [PDF]

Nanomaterials (Basel)
Ning X, Song Q, Yi Z, Zhang J, Yi Y.
europepmc   +1 more source

Superefficient optical frequency division referenced to μHz Schawlow-Townes-linewidth quantum noise-limited lasers. [PDF]

Sci Adv
Hu J, Xiao Y, Yang H, Xue S, Dong W, Zhai K, Zhu S, Qiu K, Zhang S, Ge J, Zhu NH, Jiang X, Xu J, Wen H, Zhou H.   +14 more
europepmc   +1 more source

Switchable THz Bi-Functional Device for Absorption and Dual-Band Linear-to-Circular Polarization Conversion Based on Vanadium Dioxide-Graphene. [PDF]

Sensors (Basel)
Wang Y, Xie H, Liu R, Dong J.
europepmc   +1 more source

Improving QoS for streaming data transmission over 6G networks using reconfigurable intelligent surfaces (RIS). [PDF]

Sci Rep
Ibrahim HM, Shiha MM, Nasr ME, Napoleon SA.   +3 more
europepmc   +1 more source

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Broadband frequency-chirped terahertz-wave signal generation using periodically-poled lithium niobate for frequency-modulated continuous-wave radar application

Proceedings of SPIE, 2016
We have proposed a method by using a nonlinear optical technique to generate frequency-modulated (FM) signals in the terahertz (THz) band with much broader bandwidth. Periodically-poled lithium niobates (PPLNs) are excited by ultrashort pulses, and linearly frequency-chirped THz pulses are obtained by changing the periodicity of the PPLN gradually. The
Junichi Hamazaki, Yoh Ogawa
exaly   +2 more sources