Search Results - "Nahar, Niru K"

Dielectric Properties of Low-Loss Polymers for mmW and THz Applications by Sahin, Seckin, Nahar, Niru K., Sertel, Kubilay

“…We present a systematic characterization of dielectric permittivity of 6 commonly used, low-loss polymers namely polystyrene, parylene, polyimide, SLA resin,…”
Get full text

Photonic Beamforming for 5G and Beyond: A Review of True Time Delay Devices Enabling Ultra-Wideband Beamforming for mmWave Communications by Paul, Banaful, Sertel, Kubilay, Nahar, Niru K.

“…The next generations of wireless communications are promising high capacity, low latency, and high throughput, enabled by millimeter wave spectrum. Beamforming…”
Get full text

Reconfigurable THz Filters Using Phase-Change Material and Integrated Heater by Sanphuang, Varittha, Ghalichechian, Nima, Nahar, Niru K., Volakis, John L.

“…We report the design, fabrication, and measurements of reconfigurable terahertz (THz) filters using vanadium dioxide (VO2) phase-change material (PCM), which…”
Get full text

Asthenopia and blink rate under visual and cognitive loads by Gowrisankaran, Sowjanya, Nahar, Niru K, Hayes, John R, Sheedy, James E

“…Asthenopia has been associated with reading under visually stressful conditions. However, it is not known whether increased cognitive load contributes to…”
Get full text

Characterization of Automotive Paint Permittivity for mmWave Radar Applications by Ozturk, Yagmur, Paul, Banaful, Arage, Alebel, Nahar, Niru K., Sertel, Kubilay

“…A wideband dielectric permittivity measurement method to characterize thin-film automotive paints in millimeter-wave frequency bands is presented. The proposed…”
Get full text

A Simplified Nicolson-Ross-Weir Method for Material Characterization Using Single-Port Measurements by Sahin, Seckin, Nahar, Niru K., Sertel, Kubilay

“…We present a simplified Nicolson-Ross-Weir (NRW) material characterization procedure that employs only a single-port network analyzer for data collection. This…”
Get full text

Reconfigurable Far-Infrared FSS Filters on Polyimide Substrate by Newton, Lucas, Nahar, Niru K.

“…We present a novel electrically scalable, reconfigurable frequency selective surface (FSS) far-IR filter fabricated on transparent, and flexible polyimide…”
Get full text

Noncontact Characterization of Antenna Parameters in mmW and THz Bands by Sahin, Seckin, Nahar, Niru K., Sertel, Kubilay

“…We present a novel, noncontact measurement technique for the characterization of conventional antenna parameters, including port reflection coefficient, gain,…”
Get full text

Resolution-Enhanced Polarimetric Terahertz Imaging by Hossain, Maruf Md. Sajjad, Nahar, Niru K., Sertel, Kubilay

“…We present a novel millimeter-wave and terahertz-band imaging system capable of sensing the full polarization matrix of the signals that are locally reflected…”
Get full text

Thin-Film SUEX as an Antireflection Coating for mmW and THz Applications by Sahin, Seckin, Nahar, Niru K., Sertel, Kubilay

“…We present a simple process for depositing SUEX dry films to realize effective antireflection coatings on high-resistivity silicon wafers and lenses…”
Get full text

Numerical Analysis of Terahertz Emissions From an Ungated HEMT Using Full-Wave Hydrodynamic Model by Bhardwaj, Shubhendu, Nahar, Niru K., Rajan, Siddharth, Volakis, John L.

“…In this paper, we show how plasma-wave instability in an asymmetrically biased ungated InGaAs high-electron mobility transistor (HEMT) leads to terahertz…”
Get full text

Flexible terahertz and FarIR polymer‐supported filter by Sanphuang, Varittha, Nahar, Niru K.

“…We present the design, fabrication, and measurement of a terahertz (THz) polymer‐supported filter. A periodic structure, frequency selective surfaces (FSS) is…”
Get full text

Backward-Wave Oscillator Operating in Low Magnetic Fields Using a Hybrid-TE11 Mode by Chipengo, Ushemadzoro, Nahar, Niru K., Volakis, John L.

“…We present the design of a backward-wave oscillator based on a novel slow-wave structure (SWS) operating under low magnetic field conditions (<;0.2 T). The…”
Get full text

Wideband Radomes for Millimeter-Wave Automotive Radars by Hossain, Maruf Md. Sajjad, Saqueb, Syed An Nazmus, Arage, Alebel H., Cabigao, John, Velasquez, Carlos, Sertel, Kubilay, Nahar, Niru K.

“…We demonstrate the efficacy of periodic corrugations, fabricated as part of the radar cover to serve the dual purpose of protecting the radar circuitry and…”
Get full text

Novel Phaseless Gain Characterization for Circularly Polarized Antennas at mm-Wave and THz Frequencies by Bhardwaj, Shubhendu, Nahar, Niru K., Volakis, John L.

“…We propose a new method of gain characterization for circularly polarized antenna arrays especially effective for mm-wave/THz frequencies. The method does not…”
Get full text

Cold Test Validation of Novel Slow Wave Structure for High-Power Backward-Wave Oscillators by Chipengo, Ushemadzoro, Nahar, Niru K., Volakis, John L.

“…Previous work presented the concepts of mode dominance reversal using a novel slow wave structure (SWS). An example application of this mode reversal was a…”
Get full text

Equivalent circuit for VO2 phase change material film in reconfigurable frequency selective surfaces by Sanphuang, Varittha, Ghalichechian, Nima, Nahar, Niru K., Volakis, John L.

“…We developed equivalent circuits of phase change materials based on vanadium dioxide (VO2) thin films. These circuits are used to model VO2 thin films for…”
Get full text

A Cost-Effective Phaseless Pattern Measurement Method for a CP Antenna in a Submillimeter-Wave Band by Bhardwaj, Shubhendu, Nahar, Niru K., Volakis, John L.

“…In this letter, we present a reflection-based phaseless method for circularly polarized (CP) gain characterization of antennas in the submillimeter-wave and…”
Get full text

Interactions of visual and cognitive stress by Nahar, Niru K., Gowrisankaran, Sowjanya, Hayes, John R., Sheedy, James E.

“…The objective of this research is to assess the ocular and muscular response to long-duration reading under different visual and cognitive difficulty levels…”
Get full text

Experimental Validation of Slow-Wave Phenomena in Curved Ring-Bar Slow-Wave Structure by Zuboraj, Muhammed, Chipengo, Ushemadzoro, Nahar, Niru K., Volakis, John L.

“…Curved ring-bar (CRB) slow-wave structure (SWS) has been presented before in order to design an SWS for high-power and wideband traveling-wave tube in S-band…”
Get full text