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A 220 GHz Orthogonal Modulator Based on Subharmonic Mixers Using Anti-Paralleled Schottky Diodes

Chinese Journal of Electronics 2022年第3期31卷 562-568页

作者： HE Yue LIU Ge LIU Juan LIN Changxing SU Wei Microsystem and Terahertz Research Center China Academy of Engineering Physics Institute of Electronic Engineering China Academy of Engineering Physics

In this paper, A 220 GHz orthogonal modulator based on two symmetrical subharmonic mixers is designed, analyzed and measured, where the mixers are implemented basde on antiparallel Schottky *** orthogonal modulator consists of a 90° phase shifted220 GHz 3 d B coupler, two sub-harmonically pumped mixers and an in-phase 110 GHz 3 d B power divider. The IF output signals are in-phase(I) branch and quadrature(Q) branch operating from DC±3.5 GHz. In the back to back experimentaltests, it is shown that the conversion loss of the two 220 GHz I/Q mixers is less than 30 d B when the IF operating frequency is DC-3.5 GHz, IF input power is-10 d Bm and the LO power is around 6 m W. Based on floating-point simulation, the amplitude and phase imbalance of the I/Q mixer are less than 0.2 d B and 2 degree respectively. When the 220 GHz modulator and demodulator are set in a back to back configuration, a signal-to-noise ratio of 21 d B can be obtained using the 16 QAM modulation type.

关键词： subharmonic mixers amplitude imbalance I-Q mixer floating-point simulation power dividers millimetre wave mixers millimetre wave diodes waveguide couplers quadrature amplitude modulation Schottky diode mixers radio-over-fibre phase imbalance orthogonal modulator power divider 16 QAM modulation subharmonically pumped mixers quadrature branch in-phase branch antiparalleled Schottky diodes waveguide coupler

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Novel Incentive Scheme to Motivate Flexible Customers for phase Balancing

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1048-1059页

作者： Lurui Fang Kang Ma Furong Li Fei Xue Xi'an Jiaotong-liverpool University Suzhou 215123Chin University of Bath BathUK

phase imbalance is a significant and widespread problem in low voltage(LV,415V)*** paper develops a novel incentive scheme that encourages flexible customers to engage in phase *** the technical side,this incentive scheme is based on a centralized control algorithm utilizing the inherent fexibility of customers'AC/DC converters to achieve phase balancing at the substation side of LV *** the incentive side,first,this paper calculates the benefits from phase *** then defines a rebalancing contribution index that quantifies the flexible customer's contribution to addressing the predominant imbalance-induced consequence,e.g,capacity wastes,and energy *** to the contribution indices and the benefits,the incentive scheme rewards flexible customers correspondingly and guides them to prioritize the predominant consequence of phase *** studies demonstrate that:1)the remunerations paid to the flexible customers primarily depends on their contributions to addressing the predominant imbalance-induced consequences for the network in question;2)the incentive scheme does not discriminate against small/medium-sized flexible customers who are dedicated to phase balancing,thus promoting inclusiveness.

关键词： Competition-based contribution index low voltage incentive scheme phase imbalance power distribution

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