Abstract- Stochastic Polynomial Chaos Expansion Analysis of a Split-Ring Resonator at Terahertz Frequencies

 Huludsi Acikgoz,   Raj Mittra

https://ieeexplore.ieee.org/document/8279392/

Polynomial chaos expansion (PCE) technique is applied to a conducting array of split-ring resonator to study the effect of the uncertainties of its design parameters on its reflectance at terahertz frequencies. The uniformly distributed random input design parameters have been considered. The first (average) and second (standard deviation) moments are estimated using the PCE. Strong variation of the output response caused by the uncertainties of the design parameters has been noticed. A sensitivity analysis has been carried out to assess the influence of each input parameters on the reflectance. The results show the effectiveness of the PCE and demonstrate that the PCE can be a useful statistical tool to analyze electromagnetic structures.

Abstract- Stochastic Polynomial Chaos Expansion Analysis of a Split Ring Resonator at Terahertz Frequencies

Hulusi Acikgoz,  Raj Mittra,

http://ieeexplore.ieee.org/document/8279392/

Polynomial Chaos Expansion technique is applied to a conducting array of Split Ring Resonator to study the effect of the uncertainties of its design parameters on its reflectance at THz frequencies. The uniformly distributed random input design parameters have been considered. The first (average) and second (standard deviation) moments are estimated using the PCE. Strong variation of the output response caused by the uncertainties of the design parameters has been noticed. A sensitivity analysis has been carried out to assess the influence of each input parameters on the reflectance. The results show the effectiveness of the PCE and demonstrate that the PCE can be a useful statistical tool to analyze electromagnetic structures.

Abstract-Multi-layer Intrabody Terahertz Wave Propagation Model for Nanobiosensing Applications

Hadeel Elayan, Raj Mittra, Josep Miquel Jornet, Raed M.Shubair,


http://www.sciencedirect.com/science/article/pii/S1878778917300972


Enabling wireless communication between intrabody nanosensors and wearable devices can transform the field of nanobiosensing and, ultimately, lead to revolutionary healthcare systems. Recently, it has been demonstrated that such communication can occur at Terahertz (THz) band frequencies (0.1–10 THz). For the time being, existing studies are focused on characterizing the propagation of THz waves in a uniform medium. However, in a practical system, the THz waves will traverse different body tissues as they go in/out of the body. In this paper, the propagation of THz waves across human tissues is analytically modeled and numerically analyzed. More specifically, an impedance model that accounts for the discrepancies and the thicknesses of the human tissue layers is developed to allow us to predict the loss encountered as the wave propagates through the human body at THz band frequencies. The results show the necessity of accounting for the lost power due to multi-layer reflection in order to formulate a complete intrabody communication model. At the same time, the viability of utilizing the THz band for developing a feasible intrabody communication link is demonstrated.