Optical properties of carbon nanotube thin films in subterahertz frequency regime

Abstract

values of length, width, and position parameters of the ground slot is obtained. The antenna presents three single wide band states and two dual band states including UWB states. The proposed configuration was first optimized using the IE3D software [6] followed by experimental verification. Due to multiband functionality and low profile nature, the proposed antenna is suitable for the applications in wireless multiradio systems.ABSTRACT: Multiwalled carbon nanotube (MWCNT) thin films deposited on fused quartz substrates are characterized by continuous wave subterahertz free space technique using a vector network analyzer (VNA). The scattering (S) parameters are measured by a VNA in the frequency range of 220-325 GHz (G-band) and 325-500 GHz (Y-band). The complex refractive index is extracted with the help of Nicholson-Ross-Weir method. The transmission and absorption of the thin films are also studied. VNA offers a good spectral resolution and a dynamic range of 60-70 dB around 500 GHz. The experimental technique and material parameter extraction procedures are described. The refractive ABSTRACT: The utilization of UHF Radio Frequency Identification tag to monitor the tire history in automotive tire applications is presented. This article presents a new design structure antenna and miniaturization techniques. The resonance frequency, the total gain is observed at 915 MHz, 2.3 dB respectively. This letter illustrates the mechanism of miniaturization and key dimension parameter analysis. An optimized design with 50% size reduction was fabricated and measured, where very good agreement between simulation and measurement was obtained.

Measurement Methods and Extraction Techniques to Obtain the Dielectric Properties of Materials

“…FSM method has better dynamic capacity and spectral resolution than other methods [21]. However, FSM method could not be widening unless development of measuring devices for last decade [22].…”

Artificial intelligence solution to extract the dielectric properties of materials at sub‐THz frequencies

“…FSM method has better dynamic capacity and spectral resolution than other methods [28]. However, FSM method could not be widening unless development of measuring devices for last decade [29].…”

Μορφοποίηση Και Χαρακτηρισμός Νανοσύνθετων Υλικών Πολυμερικής Μήτρας

“…Η διόγκωση των υμενίων έχει άμεση συσχέτιση με το πορώδες των υμενίων και την περιεκτικότητα των νανοσωλήνων στο τελικό νανοσύνθετο, όπως θα φανεί παρακάτω. [247][248][249], οι ηλεκτρικές [249][250][251][252], οι οπτικές [129,[253][254][255][256] κ.ά., τα υμένια μπορούν να διαδραματίσουν σημαντικό ρόλο σε ένα πλήθος εφαρμογών. Για παράδειγμα, λόγω της πολύ μεγάλης αντοχής των νανοσωλήνων σε υψηλές θερμοκρασίες, τα υμένια μπορούν να χρησιμοποιηθούν σαν επιβραδυντικά υλικά πυρός [257][258][259].…”