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Neog D.K. Pattnaik S.S. Panda D.C. Devi S. Khuntia B. Dutta M. 《Antennas and Propagation Magazine, IEEE》2005,47(3):60-65
This paper deals with the design of a multi-slot hole-coupled microstrip antenna on a substrate of 2 mm thickness that gives multi-frequency (wideband) characteristics. The Method of Moments (MoM)-based IE3D software was used to simulate the results for return loss, VSWR, the Smith chart, and the radiation patterns. A tunnel-based artificial neural network (ANN) was also developed to calculate the radiation patterns of the antenna. The radiation patterns were measured experimentally at 10.5 GHz and 12 GHz. The experimental results were in good agreement with the simulated results from IE3D and those of the artificial neural network. A new method of using a genetic algorithm (GA) in an artificial neural network is also discussed. This new method was used to calculate the resonant frequency of a single-shorting-post microstrip antenna. The resonant frequency calculated using the genetic-algorithm-coupled artificial neural network was compared with the analytical and experimental results. The results obtained were in very good agreement with the experimental results. 相似文献
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Borthakur TK Talukdar N Neog NK Rao CV Shyam A 《The Review of scientific instruments》2011,82(10):103507
A qualitative study on the performance of cylindrical vacuum photodiodes (VPDs) for x-ray detection in plasma focus device has been carried out. Various parameters of VPD such as electrode's diameter, electrode's separation, and its sensitivity are experimentally tested in plasma focus environment. For the first time it is found experimentally that the electrode-separation in the lateral direction of the two coaxial electrodes of cylindrical VPD also plays an important role to increase the efficiency of the detector. The efficiency is found to be highest for the detector with smaller cathode-anode lateral gap (1.5 mm) with smaller photo cathode diameter (10 mm). A comparison between our VPD with PIN (BPX-65) diode as an x-ray detector has also been made. 相似文献
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M. Bhuyan N. K. Neog S. R. Mohanty C. V. S. Rao P. M. Raole 《Journal of Fusion Energy》2010,29(2):177-180
Ion beam emission from a neon gas filled plasma focus device has been studied by using ion collector and solid state nuclear
track detector. The neon ion beam emission is found to be highly pressure dependant and it is maximum at a pressure of 0.3 Torr.
The maximum ion energy at 0.3 Torr is estimated to be 1 MeV. Preliminary results on solid state nuclear track detector indicate
the formation of tracks in CR-39 due to exposure of neon ions. The average rim diameter of tracks is measured to be 4.35 μm
and the number of track is of the order of 1010 track/m2. 相似文献
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Neog Suruj Protim Nair Akhil G. Das Bakshi Subhankar Dasgupta Arup Das Sourav 《Metallurgical and Materials Transactions A》2023,54(1):11-15
Metallurgical and Materials Transactions A - Quantifying strain in a deformation mechanism like wear can be critical to enhancing knowledge on structure–property correlation, especially for... 相似文献
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