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High frequency harmonics from a frequency converter causes additional losses in a deep-bar induction motor. The harmonics have their own amplitude and phase with respect to the fundamental signal, but the harmonic loss is only dependent on the amplitude of harmonics. A deep-bar induction motor can be modelled by a triple-cage circuit to take skin effect into account. The triple cage circuit having...
In this paper, a novel model for accurately evaluating the performance behaviour of subharmonic self-oscillating mixers (SOM) is presented. This model permits to investigate on the effects of various design parameters of SOMs namely in terms of conversion gain, IF frequency, noise figure, and intermodulation distortion. Such an accurate model is specifically important in the design of millimeter-wave...
For enhancing spectrum efficiency, in-band full-duplex technology is one of the candidate technical solution. But, self-interference (SI) signal causes dramatically degrade the performance. In practically, memory effect which cause harmonic in amplifier will be hard to be estimated. Therefore, we utilizes the dynamic regression (DR) to implement digital interference cancellation (DIC) for mitigate...
This letter presents the design of a wide band 8th harmonic mixer, using an anti-parallel pair of planar Schottky GaAs flipp-chip diodes fabricated onto a suspended quartz-based microstrip circuit. Simulations predict conversion losses are well below 23dB from 330 to 500GHz. The design offers an solution to simplify the local oscillator signal generation and realize the goal of low frequency conversion...
In this paper, a hybrid high-order behavioural model is proposed to mimic the response of strongly nonlinear unmatched RF transistors. In this model, a high-order Multi-Harmonic Volterra (MHV) behavioural model is used to predict the DC and fundamental frequency components of the output signal, while higher harmonic components are predicted by the Poly-Harmonic Distortion (PHD) model. The added coefficients...
A Poly-Harmonic Distortion (PHD) model extraction procedure is proposed to improve the model accuracy for unmatched, broadband RF transistors by minimizing multi-harmonic signal reflections within the measurement system. As a result, the fictitious need for higher-order models is avoided by minimizing the order of the nonlinear measurement system used to extract the model. Under strongly nonlinear...
This paper is concerned with the development and evaluation of a number of modelling techniques which improve Qucs Harmonic Balance simulation performance of RF compact device models. Although Qucs supports conventional SPICE semiconductor device models, whose static current/voltage and dynamic charge characteristics exhibit second and higher order derivatives may not be continuous, there is no guarantee...
A novel approach to the modelling of passive intermodulation (PIM) generation in passive components with distributed weak nonlinearities is outlined. Based upon the formalism of X-parameters, it provides a unified framework for co-design of antenna beamforming networks, filters, combiners, phase shifters and other passive and active devices containing nonlinearities at RF front-end. The effects of...
This paper is aiming at making behavioral model of RF device by using Volterra series theory. When we consider the periodic input signal, the Volterra series will presents a discrete form. In this paper, a five-order nonlinear system is applied to derive the Volterra series expansions which can express DC term and harmonic components in frequency domain. The simulation shows that the performance of...
An innovative method to model, in the early design stage, the behavior of nonlinear analog circuits in the presence of noise is presented. The technique relies on Harmonic Balance analysis and the obtained model does not only efficiently predict the influence of a continuous wave disturbance, it may also be used to quickly estimate the device's behavior while being subjected to amplitude modulated...
This paper proposes a novel procedure of designing a power amplifier with broadband and high linearity, which is applied to acoustic optical modulator. Firstly, a transistor should be suitably chosen, here we accomplish the direct current (DC) simulation in order to get the right quiescent operating point under the platform Advanced Design System 2009 (ADS). Then some stability simulations and measurements...
Since the last decade, the behavioral modeling of RF functional blocks (amplifiers, mixers, (de)modulators, etc.) has been a flourishing research domain that has led to a better overall understanding of the nonlinear dynamics impact to the circuit performances. Recently the X-parameter paradigm has been introduced. The formalism provides a comprehensive description of the relationships between all...
We describe the large-signal characterization of mm-wave FET power amplifiers with high-Q matching network performed through full band Monte Carlo particle-based device simulations self-consistently coupled with a Harmonic Balance frequency domain circuit solver. Such circuit-device simulations allow to include the effect of the matching network as well as parasitic elements in the large-signal characterization...
In this paper a new behavioral model that describes energy harvester circuits for use in RFID systems will be presented. The use of X parameters, recently proposed for Power Amplifier characterization, will be expanded to RFID circuits. It is expected that this type of model is able to improve the design and optimization of energy harvester circuits, and give a step forward in terms of RFID simulation...
Volterra analysis of the ultra high-speed CMOS switched source follower (SSF) track and hold amplifier (THA) is presented based on a simplified RF model. Approximate expressions for the transfer function, the harmonic equations and third-order intermodulation distortion equation are derived respectively. Simulations based on a commercial available 65 nm CMOS process technology are performed with the...
The research developed in this paper lies in the framework of the Wireless Power Transportation (WPT) applied to the RFID. The carried study aims at to obtain the best efficiency of the collecting/rectifying part of the WPT system (rectenna) where recovery of the microwave energy into continuous energy takes place. The optimization is performed on an equivalent circuit approach of the rectenna with...
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