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Performance Optimization of Microstrip Antenna with Different Slot Configurations and Various Dielectric Materials

Journal of Electronic Science and Technology 2018年第4期16卷 379-384页

作者： Soumendu Ghosh Abhijit Ghosh Indranath Sarkar department of Electronics and Communication Engineering JIS College of Engineering( India) department of Radio plysics and Electronics University of Calcutta

The probe-fed patch antennas were proposed by changing the parameters such as dielectric materials and dimensions of patch for detail investigation of changes in output characteristics. Four rectangular slots were introduced separately for optimizing the antenna design and characteristics. This study illustrated the changes of output characteristics of an antenna with respect to the number of introduced slots on the radiating patch in addition to the effect of various dielectric materials on antenna performances. The antenna performances were analyzed by plotting the observation of various dielectric materials. The changes of antenna characteristics were also observed by introducing four numbers of slots on each edge of the patch to improve radiation characteristics with a wider impedance bandwidth.

关键词： Microstrip antenna probe-fed slot-antenna wireless communications

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Palladium nanoparticles/wool keratin-assisted carbon composite-modified flexible and disposable electrochemical solid-state pH sensor

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Chinese Physics B 2022年第2期31卷 634-640页

作者： Wenli Zhang Xiaotian Liu Youhui Lin Liyun Ma Linqing Kong Guangzong Min Ronghui Wu Sharwari K.Mengane Likun Yang Aniruddha B.Patil Xiang Yang Liu department of plysics College of Materialsand Shenzhen Research Institute of Xiamen UniversityXiamcn University.Xiamen 361005China department of Botany M.H.Shinde Mahavidyalaya.TisangiKolhapur 416226India department ot Chemitry M.D.CollegeParelMumbai-400012India

Several p H-dependent processes and reactions take place in the human body;hence,the p H of body fluids is the best indicator of disturbed health ***,accurate and real-time diagnosis of the p H of body fluids is complicated because of limited commercially available p H ***,we aimed to prepare a flexible,transparent,disposable,userfriendly,and economic strip-based solid-state p H sensor using palladium nanoparticles(Pd NPs)/N-doped carbon(NC)composite *** Pd NPs/NC composite material was synthesized using wool keratin(WK)as a *** insitu prepared Pd NPs played a key role in the controlled switching of protein structure to the N-doped carbon skeleton withπ–πarrangement at the mesoscale level,which mimics the A–B type polymeric structure,and hence,is highly susceptible to H+*** optimized carbonization condition in the presence of Pd NPs showed that the material obtained using a modified Ag/Ag Cl reference electrode had the highest p H sensitivity with excellent stability and *** optimized p H sensor showed high specificity and selectivity with a sensitivity of 55 m V/p H unit and a relative standard deviation of 0.79%.This study is the first to synthesize Pd NPs using WK as a stabilizing and reducing *** applicability of the sensor was investigated for biological samples,namely,saliva and gastric *** proposed protocol and material have implications in solid-state chemistry,where biological material will be the best choice for the synthesis of materials with anticipated performance.

关键词： palladium nanoparticle electrochemical sensor solid-state pH sensor flexible strip sensor

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NJL Mechanism and Supersymmetry Behavior at Finite Temperature

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Chinese Physics Letters 1993年第8期10卷 456-459页

作者： SONG Heshan XU Guangnan AN Ying CCAST(World Laboratory) Bejing 100080also Departnrent of PlysicsDalian University of TechnologyDalian 116024(mailing address) department of Physics Liaoning Normal UniversityDalian 116021 Institute of Theoretical Physics Academia SinicaBeijing 100080

It is shown that the supersymmetry breaking can be realized dynamically by Nambu-Jona-Lasinio(NJL)*** supersymmetry behavior at finite temperature is also investigated and shown that the supersymmetry broken dynamical... 详细信息

关键词： temperature mechanism symmetry

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An experimental methodology for the concurrent characterization of multiple parameters influencing nanoscale friction

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Friction 2020年第3期8卷 577-593页

作者： Marko PERCIC SaSa ZELENIKA Igor MEZIC Robert PETER Niksa KRSTULOVIC University of Rijeka Faculty of EngineeringVukovarska 58Rijeka 51000Croatia University of Rijeka Centre for Micro-and Nanosciences and TechnologiesRadmile Marej&ie 2Rjeka 51000 Croatia department of Mechanical Engineering UC Santa BarbaraSanta BarbaraCA 93105USA University of Rijeka Department of PlysicsRadmile Matejtic 2Rijeka 51000Croatia Institute of Plnysics Bijenicka 46Zagreb 1000Croatia

A structured transdisciplinary method for the experimental determination of friction in the nanometric domain is proposed in this *** dependence of nanoscale friction on multiple process parameters on these scales,which comprise normal forces,sliding velocities,and temperature,was studied via the lateral force microscopy *** procedure used to characterize the stiffness of the probes used,and especially the influence of adhesion on the obtained results,is thoroughly *** analyzed thin films were obtained by using either atomic layer or pulsed laser *** developed methodology,based on elaborated design of experiments algorithms,was successfully implemented to concurrently characterize the dependence of nanoscale friction in the multidimensional space defined by the considered process *** enables the establishment of a novel methodology that extends the current state-of-the-art of nanotribological studies,as it allows not only the gathering of experimental data,but also the ability to do so systematically and concurrently for several influencing variables at ***,in turn,creates the basis for determining generalizing correlations of the value of nanoscale friction in any multidimensional experimental *** developments create the preconditions to eventually extend the available macro-and mesoscale friction models to a true multiscale model that will considerably improve the design,modelling and production of MEMS devices,as well as all precision positioning systems aimed at micro-and nanometric accuracy and precision.

关键词： nanoscale friction lateral force microscopy experimental determination methodology multivariate space contact mechanics

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Micros true ture and Elec tron Conduction Mechanism of Hydrogenated Nano-crystalline Silicon Films

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Chinese Physics Letters 1993年第9期10卷 539-542页

作者： HE Yuliang(Y.L.HE) CHU Yining(Y.M.CHU) LIN Hongyi(H.Y.LIN) JIANG Shusheng(S.S.JIANG) The Almorplous plysics Research Lnboratory Beijing University of Acronan tics aud Astroal ticsBeijing 100083 Beijing Laboratory of Elcctronic Microscopy.Academia Sinica Beijing 100080 department of Electronic Engineering.Beijing Institute of Teclunology Beijing 100081 Laboratory of Solid State Microstrnctures Nanjing UniversityNanjing 210008

The hydrogeunted nano-crystalline silicou(nc-Si:H)fims have been deposited with plasma cnl hanced chenuical vapor depositioi *** microstrncture of tluese films las bcen studied by trausnission electrol microscopy and high resolution trans-mission electron *** nc-Si:H filuus slow fiber tex ture *** fractal dimeision of this structure lus bccn cnlculated witl it Fouricr filtered *** relatiouship betwecn conductivity and temperature las also been studied and the mechnnisi of clectron conuduction is cdiscussed.

关键词： structure. method. crystalline

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