A novel technique for obtaining a single-layer single-feed dual-band microstrip antenna loaded wi... more A novel technique for obtaining a single-layer single-feed dual-band microstrip antenna loaded with narrow slots having capacitive loading has been studied which shows tuning and reconfigurability at the two frequencies 1.72 GHz and 2.885 GHz respectively. By embedding a pair of slots of proper lengths close to the radiating edges, the rectangular patch has been shown to realize dual-band broadside directions. More freedom for tuning the resonant frequencies, the frequency ratio, and the input impedance are available because of more design parameters such as slot length and width and its position from radiating edges. The range of the frequency ratio (FR) that can be obtained is between 1.6 to 2. By varying the capacitance value (0.1 pF to 1pF), a tuning of around 100-160 MHz is achieved at both the frequencies. New empirical formulas are designed by modifying the formulas for reactively loaded patch with slot loading. Broadband antennas provide higher bandwidth at the expense of th...
This research article reports DC and microwave performance of ultra-scaled AlN/GaN/InGaN double h... more This research article reports DC and microwave performance of ultra-scaled AlN/GaN/InGaN double heterojunction high electron mobility transistor (HEMT) on SiC substrate. The device structure is simulated by using Synopsys Sentaurus TCAD Drift-Diffusion transport model at room temperature. The device featuring n+ InGaN/GaN ohmic contacts, fully passivated device structure,and T-gate structure. Record current gain cut-off frequency (ft) of 451 GHz and simultaneous power gain cut-off frequency (fmax) of 448 GHz were obtained for 20 nm gate length HEMT. Three terminal off-state breakdown voltage of 21 V and Johnson Figure of Merit (JFoM) of 9.4 THz-V were achieved by suppressing the leakage currents as well as parasitic delay. The short channel effects (SCEs) of the device is majorly reduced as SS = 81 mV/dec and DIBL = 112 mV/V. The preeminent microwave characteristics with the higher breakdown voltage of the proposed GaN-based HEMT are the expected to be the most optimistic applicant ...
Special Issue - Advanced Manufacturing and Machining Processes, Journal of Manufacturing and Materials Processing, 2020
This work presents a comprehensive structure for evaluating the sustainability of machining proce... more This work presents a comprehensive structure for evaluating the sustainability of machining processes. Industries can contribute towards developing a sustainable future by using algorithms that evaluate the sustainability of their processes. Inspired by the literature, the proposed model involves a set of metrics that are critical in evaluating the impact of a process on society, environment, and economy. The flexibility of this model allows decision-makers to use the available responses to identify the most favorable process. The entropy weight method was suggested for objectively calculating the weights of each indicator. A multi-criteria decision-making method i.e., Technique for Order Preference based on Similarity to Ideal Solution (TOPSIS), was used to rank processes in the decreasing order of their sustainability. The proposed algorithm was successfully validated with case studies from the published literature. A MATLAB code was also created so that industries may expeditious...
A novel technique for obtaining a single-layer single-feed dual-band microstrip antenna loaded wi... more A novel technique for obtaining a single-layer single-feed dual-band microstrip antenna loaded with narrow slots having capacitive loading has been studied which shows tuning and reconfigurability at the two frequencies 1.72 GHz and 2.885 GHz respectively. By embedding a pair of slots of proper lengths close to the radiating edges, the rectangular patch has been shown to realize dual-band broadside directions. More freedom for tuning the resonant frequencies, the frequency ratio, and the input impedance are available because of more design parameters such as slot length and width and its position from radiating edges. The range of the frequency ratio (FR) that can be obtained is between 1.6 to 2. By varying the capacitance value (0.1 pF to 1pF), a tuning of around 100-160 MHz is achieved at both the frequencies. New empirical formulas are designed by modifying the formulas for reactively loaded patch with slot loading. Broadband antennas provide higher bandwidth at the expense of th...
This research article reports DC and microwave performance of ultra-scaled AlN/GaN/InGaN double h... more This research article reports DC and microwave performance of ultra-scaled AlN/GaN/InGaN double heterojunction high electron mobility transistor (HEMT) on SiC substrate. The device structure is simulated by using Synopsys Sentaurus TCAD Drift-Diffusion transport model at room temperature. The device featuring n+ InGaN/GaN ohmic contacts, fully passivated device structure,and T-gate structure. Record current gain cut-off frequency (ft) of 451 GHz and simultaneous power gain cut-off frequency (fmax) of 448 GHz were obtained for 20 nm gate length HEMT. Three terminal off-state breakdown voltage of 21 V and Johnson Figure of Merit (JFoM) of 9.4 THz-V were achieved by suppressing the leakage currents as well as parasitic delay. The short channel effects (SCEs) of the device is majorly reduced as SS = 81 mV/dec and DIBL = 112 mV/V. The preeminent microwave characteristics with the higher breakdown voltage of the proposed GaN-based HEMT are the expected to be the most optimistic applicant ...
Special Issue - Advanced Manufacturing and Machining Processes, Journal of Manufacturing and Materials Processing, 2020
This work presents a comprehensive structure for evaluating the sustainability of machining proce... more This work presents a comprehensive structure for evaluating the sustainability of machining processes. Industries can contribute towards developing a sustainable future by using algorithms that evaluate the sustainability of their processes. Inspired by the literature, the proposed model involves a set of metrics that are critical in evaluating the impact of a process on society, environment, and economy. The flexibility of this model allows decision-makers to use the available responses to identify the most favorable process. The entropy weight method was suggested for objectively calculating the weights of each indicator. A multi-criteria decision-making method i.e., Technique for Order Preference based on Similarity to Ideal Solution (TOPSIS), was used to rank processes in the decreasing order of their sustainability. The proposed algorithm was successfully validated with case studies from the published literature. A MATLAB code was also created so that industries may expeditious...
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