Search results for: KIT
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Filtrujące struktury ebg w układzie zasilania planarnej anteny szczelinowej
PublicationW pracy zaprezentowano koncepcję miniaturyzacji systemu nadawczo/odbiorczego polegającą na wprowadzeniu filtrujących struktur EBG (ang. Electromagnetic BandGap) w torze zasilania anteny, dzięki czemu możliwa jest eliminacja dodatkowego komponentu filtrującego. Rozważono szerokopasmową antenę szczelinową o konwencjonalnej topografii, którą następnie zmodyfikowano poprzez umieszczenie w układzie zasilania prostej, pasmowo-zaporowej...
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Zminiaturyzowane, planarne filtry pasmowo-przepustowe o nowej topologii
PublicationW referacie zaprezentowano proces miniaturyzacji filtru pasmowo-przepustowego, zbudowanego w oparciu o sprzężone linie mikropaskowe, polegający na zastosowaniu dwóch komplementarnych technik: (i) zmianie geometrii sprzężonych sekcji linii mikropaskowych za pomocą krzywych fraktalnych w celu skrócenia odcinków linii sprzężonych oraz zwiększeniu tłumienia w paśmie zaporowym dla częstotliwości 2f0 oraz (ii) wprowadzeniu perforacji...
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Compact antenna array comprising fractal-shaped microstripradiators
PublicationA design method of antenna array consisting of eight microstrip patches modified with Sierpinski fractal curves has been presented andexperimentally validated in this paper. Method proposed has enabled the achievement of considerable miniaturization of array length (26%),together with multi-band behavior of the antenna, which proves the attractiveness of presented design methodology and its ability to be implemented in more complex...
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Novel topology of compact coplanar waveguide resonant cell low-pass filter
PublicationIn this study, a novel pseudoelliptic function low-pass filter (LPF) constituted by a compact coplanar waveguide resonant cell has been designed and manufactured. The lumped-element seven-pole prototype has been adequately realized by using complementary perturbations located both in signal line and ground plane metallization. The fabricated uniplanar LPF offers a compact size of 5.6 x 9.8 mm2, return loss better than 26 dB over...
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Dwuzakresowy sprzęgacz gałęziowy do systemów WLAN2.45 i WLAN5.25
PublicationPrzedstawiono klasyczny sprzęgacz gałęziowy zaprojektowany w taki sposób, aby możliwa była jego praca w dwóch podzakresach częstotliwości, tzn. w pasmach WLAN2.45 i WLAN5.25. Dwuzakresową pracę uzyskano poprzez adekwatną modyfikację obwodu, polegającą na dołączeniu rozwartych na końcu odcinków linii, równoważnych określonym reaktancjom. Wykonany model układu oraz przeprowadzone badania eksperymentalne potwierdziły możliwość wykorzystania...
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Dwuzakresowy sprzęgacz gałęziowy dla systemów WLAN2.45 i WLAN5.25
PublicationPrzedstawiono klasyczny sprzęgacz gałęziowy zaprojektowany w taki sposób, aby możliwa była jego praca w dwóch podzakresach częstotliwości, tzn. w pasmach WLAN2.45 i WLAN5.25. Dwuzakresową pracę uzyskano poprzez adekwatną modyfikację obwodu, polegającą na dołączeniu rozwartych na końcu odcinków linii, równoważnych określonym reaktancjom. Wykonany model układu oraz przeprowadzone badania eksperymentalne potwierdziły możliwość wykorzystania...
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Design of mm-wave MIC frequency multiplayers and mixers using simple microstrip high-pass filters
PublicationPrzedyskutowano podstawowe wymagania dotyczące impedancji elementów półprzewodnikowych wykorzystywanych w mieszaczach i powielaczach częstotliwości projektowanych dla zakresu fal milimetrowych. Określono typy układów filtrujących niezbędnych w różnych częściach układów, podkreślając znaczenie filtrów górnoprzepustowych. Mikropaskowy filtr ze zwartym brzegiem został wykonany i zaimplementowany w mieszaczu pracującym w zakresie 20-40GHz.
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Pea Protein for Hempseed Oil Nanoemulsion Stabilization
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CdS Nanocrystallines: Synthesis, Structure and Nonlinear Optical Properties
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Enhancement of second harmonic generation in nanocrystalline SiC films based natural microcavities
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Chitosan-coated coconut shell composite: A solution for treatment of Cr(III)-contaminated tannery wastewater
PublicationTannery industry generates a large amount of Cr(III)-contaminated wastewater daily. Unless properly treated, not only this effluent contaminates the water body, but also damages the environment and threatens public health. This batch study investigates the feasibility of chitosan-coated coconut shells as a low-cost material for removing Cr(III) from tannery wastewater. Both chitosan and coconut shell (CS) waste are abundantly available...
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Leveraging food waste for electricity: A low-carbon approach in energy sector for mitigating climate change and achieving net zero emission in Hong Kong (China)
PublicationIn recent years, food waste has been a global concern that contributes to climate change. To deal with the rising impacts of climate change, in Hong Kong, food waste is converted into electricity in the framework of low-carbon approach. This work provides an overview of the conversion of food waste into electricity to achieve carbon neutrality. The production of methane and electricity from waste-to-energy (WTE) conversion are...
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Some Aspects of Measuring Nonlinear Optical Features of Advanced Vertically Aligned Mesoporous Silica Thin Films Activated by Silver and Copper Ions
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Plant Extracts Containing Saponins Affects the Stability and Biological Activity of Hempseed Oil Emulsion System
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Enhancement of the efficiency of the third harmonic generation process in ZnO:F thin films probed by photoluminescence and Raman spectroscopy
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Specific features of refractive, piezo-optic and nonlinear optical dispersions of β-LiNH4SO4 single crystals
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Structural Determinants of Substrate Specificity of SplF Protease from Staphylococcus aureus
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Copper(I) π-coordination compounds with allyl derivatives of disubstituted pseudothiohydantoin: synthesis, structure investigation and nonlinear optical features
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Nonlinear optical birefringence in Li2SO4-MgO-P2O5 amorphous system -influence of Cu ions
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Third order nonlinear optical effects of ZnO–ZrO2–B2O3 glass ceramics embedded with ZnZrO3 perovskite crystal phases
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Laser stimulated third harmonic generation studies in ZnO–Ta 2 O 5 –B 2 O 3 glass ceramics entrenched with Zn 3 Ta 2 O 8 crystal phases
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Investigations on the influence CuO doping on elastic properties of Li2SO4–MgO–P2O5 glass system by means of acoustic wave propagation
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Second- and Third-Order Nonlinear Optical Response of Perovskite LiTaO3
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Influence of Ni ion site occupancy on laser induced third harmonic generation (THG) studies in Li2SO4–MgO–P2O5 amorphous system
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X-ray photoelectron spectroscopy, Raman and photoluminescence studies on formation of defects in Cu:ZnO thin films and its role in nonlinear optical features
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Influence of NiO doping on elastic properties of Li2SO4-MgO-P2O5 glass system-Investigation by means of acoustic wave propagation
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FGF7 / FGFR2 – JunB signalling counteracts the effect of progesterone in luminal breast cancer
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Functionalized mesoporous silica thin films as a tunable nonlinear optical material
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Investigation of the effect of Au2O3 dopant on elastic properties of PbO-B2O3-SeO2: Er2O3 glass ceramics by ultrasonic techniques
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Third harmonic generation studies of 1.06 μm Nd:YAG laser beam in Li2SO4–MgO–P2O5 glass system-influence of CuO
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Whey Proteins as a Potential Co-Surfactant with Aesculus hippocastanum L. as a Stabilizer in Nanoemulsions Derived from Hempseed Oil
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ThDione: A Powerful Electron‐Withdrawing Moiety for Push–Pull Molecules
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Optoelectronic and non-linear optical properties of Lu-doped AgGaGe3Se8 crystallites
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The anisotropic photorefractive effect in lithium sulfo-phosphate glass system doped with nickel ions
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Intramolecular Proton Transfer in the Radical Anion of Cytidine Monophosphate Sheds Light on the Sensitivities of Dry vs Wet DNA to Electron Attachment-Induced Damage
PublicationSingle-strand breaks (SSBs) induced via electron attachment were previously observed in dry DNA under ultrahigh vacuum (UHV), while hydrated electrons were found not able to induce this DNA damage in an aqueous solution. To explain these findings, crossed electron-molecular beam (CEMB) and anion photoelectron spectroscopy (aPES) experiments coupled to density functional theory (DFT) modeling were used to demonstrate the fundamental...
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Optically poled SHG and THG effects in cesium doped zinc oxide nanorods
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Small isomeric push–pull chromophores based on thienothiophenes with tunable optical (non)linearities
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Nanocomposite for photonics — Nickel pyrophosphate nanocrystals synthesised in silica nanoreactors
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Construction of heterometallic and mixed-valence copper(I/II) chloride π-complexes with 1,2,4-triazole allyl-derivative
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Laser operated nonlinear optical studies of BiFe0,9Cr0,1O3 and BiFe0,9Al0,1O3 multiferroics
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Laser stimulated second and third harmonic optical effects in F: SnO2 nanostructures grown via chemical synthetic route
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Average Structure, Local Structure, Photoluminescence, and NLO Properties of Scheelite Type NaCe(WO4)2
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Effect of Na doping on photoluminescence and laser stimulated nonlinear optical features of ZnO nanostructures
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Structure–property relationships and third-order nonlinearities in diketopyrrolopyrrole based D–π–A–π–D molecules
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Methodical engineering of defects in MnXZn1-X O(x = 0.03, and 0.05) nanostructures by electron beam for nonlinear optical applications: A new insight
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Experimental and theoretical analyses of the nonlinear optical effects in magnesium and copper co-doped zinc oxide nanorods
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Photoconductivity and laser operated piezoelectricity the Ag-Ga-Ge-(S,Se) crystals and solid solutions
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Second and third harmonic nonlinear optical process in spray pyrolysed Mg:ZnO thin films
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Strategic improvement of second and third harmonic generation in multifunctional Cu-Sn-S3 ternary semiconducting thin films
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Novel Quaternary TlGaSn2Se6 Single Crystal as Promising Material for Laser Operated Infrared Nonlinear Optical Modulators
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