Results 61 to 70 of about 328,962 (374)
Terahertz Resonances of Transverse Standing Waves in a Corrugated Plate Waveguide
IEEE Photonics Journal, 2022 Terahertz (THz) propagation in periodic structures has attracted great attention because of its captivating electrical and optical properties. However, the created THz band gaps are usually considered to be caused by Bragg resonances.
Jing Ma +5 more
doaj +1 more source
Wireless recording of the calls of Rousettus aegyptiacus and their reproduction using electrostatic transducers [PDF]
, 2008 Bats are capable of imaging their surroundings in great detail using echolocation. To apply similar methods to human engineering systems requires the capability to measure and recreate the signals used, and to understand the processing applied to ...
D A Waters +13 more
core +1 more source
Beam Squint and Channel Estimation for Wideband mmWave Massive MIMO-OFDM Systems [PDF]
IEEE Transactions on Signal Processing, 2019 With the increasing scale of antenna arrays in wideband millimeter-wave (mmWave) communications, the physical propagation delays of electromagnetic waves traveling across the whole array will become large and comparable to the time-domain sample period ...
Bolei Wang +4 more
semanticscholar +1 more source
W-Band GaAs HEMT MMIC Subharmonically Pumped Diode Mixers with 20 GHz IF Bandwidth [PDF]
, 2002 Two subharmonically pumped (SHP) diode mixers are designed for wideband W-band RF frequencies, fixed LO frequency operation. These mixers are fabricated on a 4-mil substrate using 0.1- µµµµm GaAs MMIC process.
Chu, Tah-Hsiung +2 more
core +1 more source
Wideband Dual-Layer Huygens’ Metasurface for High-Gain Multibeam Array Antennas
IEEE Transactions on Antennas and Propagation, 2021 A wideband dual-layer Huygens’ unit cell based on offset electric dipole pair (OEDP) is proposed. Different from traditional designs with a combination of electric and magnetic polarizabilities, the proposed Huygens’ unit cell exclusively employs ...
Ji-wei Lian, Y. Ban, Y. Guo
semanticscholar +1 more source
Multi‐band joint local sparse tracking via wavelet transforms
IET Computer Vision, 2016 A novel multi‐band joint local sparse tracking algorithm via wavelet transforms is proposed in this study. The object image may contain rich information of different types; the authors use wavelet transforms to decompose the object image into some sub ...
Guang Han +5 more
doaj +1 more source
Micromachines, 2023 In this paper, we proposed a multibeam switching antenna based on a low-cost reconfigurable hybrid metasurface applied for beamforming systems. The antenna consists of two parts: a microstrip feed antenna and a transmission hybrid metasurface. The latter
Lili Sheng +4 more
doaj +1 more source
Cooperative wideband spectrum sensing with multi-bit hard decision in cognitive radio [PDF]
, 2013 Cognitive radio offers an increasingly attractive solution to overcome the underutilization problem. A sensor network based cooperative wideband spectrum sensing is proposed in this paper. The purpose of the sensor network is to determine the frequencies
Ammar, M. +4 more
core +1 more source
FEBS Open Bio, EarlyView.We investigated the toxicity of 12 active compounds commonly found in herbal weight loss supplements (WLS) using human liver and colon cell models. Epigallocatechin‐3‐gallate was the only compound showing significant toxicity. Metabolic profiling revealed protein degradation, disrupted energy and lipid metabolism suggesting that the inclusion of EGCG ...
Emily C. Davies +3 more
wiley +1 more source
EZR-MZR Resonators for Compact Low-Profile Omnidirectional Circular-Polarized Antenna Design
IEEE Photonics Journal, 2017 New zeroth-order resonator (ZOR): the curved EZR-MZR resonator [epsilon-zero resonance (EZR) and mu-zero resonance (MZR)] was proposed for circular-polarized (CP) antenna design with low-profile and omnidirectional characteristics.
Lin Peng +4 more
doaj +1 more source