Faculty Publications
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Item An integrated cascode DE power amplifier for RF calibration system towards measurement of bio-sensor applications(John Wiley and Sons Inc. P.O.Box 18667 Newark NJ 07191-8667, 2019) Kumar, R.; Kumar Kanaujia, B.K.; Dwari, S.; Kumar, S.; Song, H.The integrated cascode DE power amplifier for RF calibration system toward measurement of bio-sensor applications is presented in this paper. The proposed architecture includes cascode class-D and class-E amplifier stages that could provide better calibration accuracy in terms of wide bandwidth, power efficiency, high gain, minimum group delay, and lowest calibration system. The achieved high performance of proposed amplifier overcomes conventional measurement issues toward bio-sensor application. The inductive ?-shape matching network drives RF input to class-D stage and provides wide bandwidth of operation. While class-E stage with T-shape matching network maintains stable gain and high efficiency in desired band of operation. The performance of the CMOS proposed amplifier is executed in RF ADS simulator along with fabricated chip using commercial TSMC 65 nm manufacturing process. The simulated and measured data achieves Ku band (12 GHz to 18 GHz) with almost flat gain of 30 dB. The DE amplifier provides an output and saturated power of 17 dBm with highest power efficiency of 45%. The measured calibration factor at maximum resonant frequency of 13.5 GHz achieves best value of less than 2 dB within input power range of ?50 dBm to 0 dBm. The lowest calibration factor provides best accuracy along with the other parameters and could be beneficial toward bio-sensor measurement in the various applications. The calculated area of the fabricated chip is as 0.45*0.45mm2 where class-E consuming area of 38% and class-D of 44%. The fabricated chip consumes less power consumption of 3.2 mW under power supply of 1 V. © 2018 Wiley Periodicals, Inc.Item Performance of cascode Class-EF?1 PA with built-in techniques for UWB radar toward monitoring of patient actions(Institution of Engineering and Technology kvukmirovic@theiet.org, 2020) Kumar, R.; Dwari, S.; Kumar Kanaujia, B.K.; Kumar, S.; Song, H.This work proposes a performance of the cascode Class-EF?1 power amplifier (PA) for UWB radar transmitter. The cascode Class-E PA with built-in techniques overcomes the traditional mismatch and provides good performance of PA. Incurs the resonance and switching effect is observed in cascode Class-E PA that compensates for the parasitic effects and provides a wide-impedance range. While design-II includes negative capacitance and inverse Class-F, which achieves a redundant performance of wide bandwidth and power-added efficiency (PAE). Design-II achieves the redundant performance compared with design-I. Both design-I and design-II are implemented and analysed through simulation and experimental results using RF 65 nm Samsung Magnachip Hynix CMOS process. Design-I achieves a wide-impedance bandwidth ranging from 3 to 11.7 GHz with drain efficiency (DE) and maximum PAE of 80 and 73% at the output power of 26.4 dBm. The global efficiency (GE) and error vector magnitude (EVM) of 70 and 5.2% are also achieving for design-I. The redundant performance in design-II achieves wide bandwidth with operating frequency range of 2-13 GHz with maximum DE and PAE of 85 and 76%. For design-II, GE and EVM are investigated as 68 and 4.9% that could validate the accuracy and robustness of the UWB radar. © The Institution of Engineering and Technology 2019