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,…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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,…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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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…”
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