Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733491
N. Rajasekhar, K. Anusudha
A dual band microstrip dumbbell like slot antenna for wireless communication applications such as WiMAX (3.2-3.8 GHz), WLAN (5.2-5.8 GHz) and satellite communications downlink (3.7-4.2) GHz, uplink (5.925-6.425) GHz, is presented in this paper. The antenna consists of finite ground plane(27.62×22.52 mm2) with dumbbell like slots on the patch with size of 22.82×17.72 mm2 fed by 50O microstrip feed line. This antenna is realized on FR4 epoxy substrate with permittivity 4.4 and loss tangent of 0.002.It has desired antenna characteristics such as return loss better than 10dB, VSWR, gain and radiation pattern at the specified resonant frequencies. The B.W of antenna (band1-31.1%, band2-24%) is greatly improved by optimizing the width and length of the slots. The antenna is simulated using Zeland IE3D 15.10 electromagnetic solver.
{"title":"Dual band microstrip antenna with dumbbell slot for WiMAX/WLAN/satellite communications","authors":"N. Rajasekhar, K. Anusudha","doi":"10.1109/ICMAP.2013.6733491","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733491","url":null,"abstract":"A dual band microstrip dumbbell like slot antenna for wireless communication applications such as WiMAX (3.2-3.8 GHz), WLAN (5.2-5.8 GHz) and satellite communications downlink (3.7-4.2) GHz, uplink (5.925-6.425) GHz, is presented in this paper. The antenna consists of finite ground plane(27.62×22.52 mm2) with dumbbell like slots on the patch with size of 22.82×17.72 mm2 fed by 50O microstrip feed line. This antenna is realized on FR4 epoxy substrate with permittivity 4.4 and loss tangent of 0.002.It has desired antenna characteristics such as return loss better than 10dB, VSWR, gain and radiation pattern at the specified resonant frequencies. The B.W of antenna (band1-31.1%, band2-24%) is greatly improved by optimizing the width and length of the slots. The antenna is simulated using Zeland IE3D 15.10 electromagnetic solver.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127743314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733485
Ashmi Chakraborty Das, L. Murmu, S. Dwari
This paper presents a compact 3 dB Quadrature branch-line coupler using folded microstrip line geometry. Commercially available IE3D software has been used to design and simulate the structure. The proposed structure is simple and takes lesser optimization time. It has been shown that the structure provides about 43.63% compactness compared to the conventional branch line coupler. The structure, therefore, can be incorporated in the microwave circuit design where medium level compactness and faster design are preferred.
{"title":"A compact branch-line coupler using folded microstrip lines","authors":"Ashmi Chakraborty Das, L. Murmu, S. Dwari","doi":"10.1109/ICMAP.2013.6733485","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733485","url":null,"abstract":"This paper presents a compact 3 dB Quadrature branch-line coupler using folded microstrip line geometry. Commercially available IE3D software has been used to design and simulate the structure. The proposed structure is simple and takes lesser optimization time. It has been shown that the structure provides about 43.63% compactness compared to the conventional branch line coupler. The structure, therefore, can be incorporated in the microwave circuit design where medium level compactness and faster design are preferred.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"89 Pt B 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132271405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733556
B. Priyadarshini, M. Das
In recent year's nano material has been considered as a technology booster for solar photovoltaic cell. Si nanorod solar cells have not only shown an improvement in the device performance but are also compatible with the existing silicon process technology. In this work, we have developed a new device model for radial p-n junction silicon nanorod solar cell with a pyramidal structure between two nanorods. Efficiency of cell is studied by changing the different cell parameters and a nonlinear variation is obtained in most of the cases. Efficiency increases when length, reflectivity and angle of inclination increase. When the D/P ratio of the nanorod increases, efficiency increases initially and after some particular value it saturates. Simulation result shows that maximum efficiency of 21% is obtained at fixed length of 10 μm and for the angle of inclination of 100.
{"title":"Modeling and design of core-shell p-n junction Si nanorod solar cell with pyramidal structure","authors":"B. Priyadarshini, M. Das","doi":"10.1109/ICMAP.2013.6733556","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733556","url":null,"abstract":"In recent year's nano material has been considered as a technology booster for solar photovoltaic cell. Si nanorod solar cells have not only shown an improvement in the device performance but are also compatible with the existing silicon process technology. In this work, we have developed a new device model for radial p-n junction silicon nanorod solar cell with a pyramidal structure between two nanorods. Efficiency of cell is studied by changing the different cell parameters and a nonlinear variation is obtained in most of the cases. Efficiency increases when length, reflectivity and angle of inclination increase. When the D/P ratio of the nanorod increases, efficiency increases initially and after some particular value it saturates. Simulation result shows that maximum efficiency of 21% is obtained at fixed length of 10 μm and for the angle of inclination of 100.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125069137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733508
Shruti Gupta, Dharmendra Singh, P. Mishra, S. Garg
Fully polarimetric SAR data has the ability of characterizing and differentiating various land covers as it conserves detailed information of the amplitude and the phase of backscattering coefficient, which helps in distinguishing diverse scattering mechanisms. The classification by means of polarimetric data could be enhanced by fusing it with statistical information, but labeling of different classes is still a challenge. So, in this paper, probability density function based approach has been proposed for identification of different classes of land cover. Land cover is classified into four classes using polarimetric indices information and then six probability density functions are applied on each of the classes. Chi-Squared goodness of fit (GoF) test has been used for selecting best-fit density function for each of the classes. The boundaries of the classes were estimated using scale and location parameter of the best-fit density function. The proposed approach was applied on ALOS PALSAR data which resulted in good identification of urban and water region.
{"title":"Probability density functions based study for identification of land cover using SAR data","authors":"Shruti Gupta, Dharmendra Singh, P. Mishra, S. Garg","doi":"10.1109/ICMAP.2013.6733508","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733508","url":null,"abstract":"Fully polarimetric SAR data has the ability of characterizing and differentiating various land covers as it conserves detailed information of the amplitude and the phase of backscattering coefficient, which helps in distinguishing diverse scattering mechanisms. The classification by means of polarimetric data could be enhanced by fusing it with statistical information, but labeling of different classes is still a challenge. So, in this paper, probability density function based approach has been proposed for identification of different classes of land cover. Land cover is classified into four classes using polarimetric indices information and then six probability density functions are applied on each of the classes. Chi-Squared goodness of fit (GoF) test has been used for selecting best-fit density function for each of the classes. The boundaries of the classes were estimated using scale and location parameter of the best-fit density function. The proposed approach was applied on ALOS PALSAR data which resulted in good identification of urban and water region.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733474
A. Bage, Sushrut Das
In this paper we have investigated different non-conventional Split Ring Resonator (SRRs) and Complementary Split Ring Resonator (CSRRs) based metamaterial structure for band pass and band stop filter applications. These resonators are located in the cross section of the waveguide. Since SRR dimensions are much smaller than signal wavelength, the proposed filters are extremely compact.
{"title":"Studies of some non conventional split ring and complementary split ring resonators for waveguide band stop & band pass filter application","authors":"A. Bage, Sushrut Das","doi":"10.1109/ICMAP.2013.6733474","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733474","url":null,"abstract":"In this paper we have investigated different non-conventional Split Ring Resonator (SRRs) and Complementary Split Ring Resonator (CSRRs) based metamaterial structure for band pass and band stop filter applications. These resonators are located in the cross section of the waveguide. Since SRR dimensions are much smaller than signal wavelength, the proposed filters are extremely compact.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128269780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733506
S. Misra, S. Ram
In this investigation, to tailor functional properties we explore a partial Zn2+ → Li+Fe3+ substitution in a series Li0.5(1-x)ZnxFe(2.5-x/2)O4 (x = 0.3, 0.5, 0.8) via a citrate-gel combustion method using metal nitrates, citric acid, and ethylene glycol at a low temperature ~90 °C. A typical sample, at x = 0.3, annealed at 400 °C for 2 h offers a ferrimagnetic hysteresis loop with a high saturation magnetization of 52.4 emu/g and a large coercivity of 138 Oe at 100 K in a low magnetic field ± 500 Oe. The magnetization value has decreased to ~17.8 emu/g (with 4 Oe coercivity) in a sample with higher Zn2+-content (x = 0.8). FESEM images describe homogeneous distribution of crystallites average 26 nm diameter. A high dielectric constant of 15117 with a low dielectric loss of 1.49 is observed at 10 kHz at x = 0.3.
{"title":"Effect of Zn2+ → Li+Fe3+ substitution on electromagnetic properties in lithium zinc ferrite","authors":"S. Misra, S. Ram","doi":"10.1109/ICMAP.2013.6733506","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733506","url":null,"abstract":"In this investigation, to tailor functional properties we explore a partial Zn<sup>2+</sup> → Li<sup>+</sup>Fe<sup>3+</sup> substitution in a series Li<sub>0.5(1-x)</sub>Zn<sub>x</sub>Fe<sub>(2.5-x/2)</sub>O<sub>4</sub> (x = 0.3, 0.5, 0.8) via a citrate-gel combustion method using metal nitrates, citric acid, and ethylene glycol at a low temperature ~90 °C. A typical sample, at x = 0.3, annealed at 400 °C for 2 h offers a ferrimagnetic hysteresis loop with a high saturation magnetization of 52.4 emu/g and a large coercivity of 138 Oe at 100 K in a low magnetic field ± 500 Oe. The magnetization value has decreased to ~17.8 emu/g (with 4 Oe coercivity) in a sample with higher Zn<sup>2+</sup>-content (x = 0.8). FESEM images describe homogeneous distribution of crystallites average 26 nm diameter. A high dielectric constant of 15117 with a low dielectric loss of 1.49 is observed at 10 kHz at x = 0.3.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131289523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733501
K. P. Ray, K. Nirmala, S. Kakatkar, N. Madaka, C. Prince
A broadband modified Wilkinson power divider feed network for a 4 element antipodal Vivaldi antenna array in the frequency range of 2-6 GHz is presented. A modified Wilkinson power divider formed by implementing one radial stub on each branch is designed to meet the antenna specifications. Measured results are shown to meet the array specifications. This wideband array is useful in applications such as electronic warfare.
{"title":"Broadband modified Wilkinson power divider fed antipodal Vivaldi antenna array","authors":"K. P. Ray, K. Nirmala, S. Kakatkar, N. Madaka, C. Prince","doi":"10.1109/ICMAP.2013.6733501","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733501","url":null,"abstract":"A broadband modified Wilkinson power divider feed network for a 4 element antipodal Vivaldi antenna array in the frequency range of 2-6 GHz is presented. A modified Wilkinson power divider formed by implementing one radial stub on each branch is designed to meet the antenna specifications. Measured results are shown to meet the array specifications. This wideband array is useful in applications such as electronic warfare.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127247148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733448
B. Biswas, A. Mukherjee, S. Pal
Nothing has yet been reported on the existence of Barkhausen criterion and synchronization phenomenon in a LIMO. The present paper, aside considering the influence of a forcing signal, discusses the effect of amplitude modulated synchronizing signal on LIMO and the corresponding AM-PM conversion for the injection synchronized LIMO is studied in detail. In contradistinction to the previous works [1-9], three interesting results are reported in this paper, viz., (1) Modified Barkhausen criterion, resulting in the dependence free running frequency of oscillation on the loop-delay, (2) when the modulation index is small, the oscillator output is amplitude modulated wave both in the electrical and optical domain with almost no distortion; (3) oscillator output is modulation free when the carrier strength is small in comparison to that of the free-running oscillator. Moreover, the behavior of an LIMO in presence of a synchronizing signal have not been reported so far as far as the knowledge of the authors goes.
{"title":"Laser Induced Microwave Oscillator: A revisit","authors":"B. Biswas, A. Mukherjee, S. Pal","doi":"10.1109/ICMAP.2013.6733448","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733448","url":null,"abstract":"Nothing has yet been reported on the existence of Barkhausen criterion and synchronization phenomenon in a LIMO. The present paper, aside considering the influence of a forcing signal, discusses the effect of amplitude modulated synchronizing signal on LIMO and the corresponding AM-PM conversion for the injection synchronized LIMO is studied in detail. In contradistinction to the previous works [1-9], three interesting results are reported in this paper, viz., (1) Modified Barkhausen criterion, resulting in the dependence free running frequency of oscillation on the loop-delay, (2) when the modulation index is small, the oscillator output is amplitude modulated wave both in the electrical and optical domain with almost no distortion; (3) oscillator output is modulation free when the carrier strength is small in comparison to that of the free-running oscillator. Moreover, the behavior of an LIMO in presence of a synchronizing signal have not been reported so far as far as the knowledge of the authors goes.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126352921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733514
N. Halder, R. Mukherjee, Souvik Kundu, P. Banerji, D. Biswas
The work deals with the growth kinetics of III-V nanostructures, particularly InP quantum dots (QDs) on Si substrates along with its growth rate. Comparing the experimentally obtained results with the existing theoretical model, the growth regime of such heterogeneous nucleation has been predicted. The estimation of the height of the QDs has been made from the dot height distribution of Atomic Force Microscopy, and it has been related to the growth rate. The experimental results establish the growth regime as mass transfer limited. Fitting the experimental data, the growth rates have been found to be in the mass transfer limited region. Efforts have been made to predict any anomaly of the growth rate at higher temperature.
{"title":"OMVPE growth of indium phosphide nano-structures on silicon for monolithic integration","authors":"N. Halder, R. Mukherjee, Souvik Kundu, P. Banerji, D. Biswas","doi":"10.1109/ICMAP.2013.6733514","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733514","url":null,"abstract":"The work deals with the growth kinetics of III-V nanostructures, particularly InP quantum dots (QDs) on Si substrates along with its growth rate. Comparing the experimentally obtained results with the existing theoretical model, the growth regime of such heterogeneous nucleation has been predicted. The estimation of the height of the QDs has been made from the dot height distribution of Atomic Force Microscopy, and it has been related to the growth rate. The experimental results establish the growth regime as mass transfer limited. Fitting the experimental data, the growth rates have been found to be in the mass transfer limited region. Efforts have been made to predict any anomaly of the growth rate at higher temperature.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127882396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733518
Ajay Kumar, Santosh Kumar, S. Raghuwanshi
The field of signal processing is a host of mathematical tools, such as linear system theory and Fourier transform, which are used extensively in optics for the description of the optical filtering. This paper provides the mathematical analysis of optical filtering techniques. Analysis shows the detailed derivation and implementation of optical filtering techniques by Mach-Zehnder interferometer, Optical ring resonator and Fiber Bragg grating and its combination using MATLAB.
{"title":"Analysis of various optical filtering techniques","authors":"Ajay Kumar, Santosh Kumar, S. Raghuwanshi","doi":"10.1109/ICMAP.2013.6733518","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733518","url":null,"abstract":"The field of signal processing is a host of mathematical tools, such as linear system theory and Fourier transform, which are used extensively in optics for the description of the optical filtering. This paper provides the mathematical analysis of optical filtering techniques. Analysis shows the detailed derivation and implementation of optical filtering techniques by Mach-Zehnder interferometer, Optical ring resonator and Fiber Bragg grating and its combination using MATLAB.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127512498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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