منابع مشابه
Phase Noise in Microwave Oscillators and Amplifiers
Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. Phase Noise in Microwave Oscillators and Amplifiers Thesis directed by Professor Zoya Popovi´c This thesis presents analysis and measurements of phase noise in oscilla-tors and amplifie...
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The generation of RF/microwave power is required not only in wireless communications, but also in applications such as jamming, imaging, RF heating, and miniature dc/dc converters. Each application has its own unique requirements for frequency, bandwidth, load, power, efficiency, linearity, and cost. RF power is generated by a wide variety of techniques, implementations, and active devices. Pow...
متن کاملPhase noise modelling and optimisation of microwave SiGe amplifiers for sapphire oscillators applications
The nonlinear modelling of different microwave SiGe bipolar transistors has been performed. Using these models, the phase noise of an amplifier is computed, taking into account two different types of noise, the microwave additive noise floor and the up-converted 1/f noise. The simulation technique combines different approaches available in a commercial CAD software. Theoretical results are then...
متن کاملA Hysteretic Two-phase Supply Modulator for Envelope Tracking RF Power Amplifiers
In this paper a two-phase supply modulator suitable for envelope tracking power amplifier is presented. The designed supply modulator has the linear assisted switching architecture. Two-phase architecture is used in order to reduce the output switching ripples. The proposed architecture uses hysteretic control instead of pulse width modulation (PWM) which significantly reduces the circuit compl...
متن کاملOn Noise in Distributed Amplifiers at Microwave Frequencies
Formulas for the noise figure, and the minimum uoisefigure of a multi-link distributed amplifier have been developed. In addition, a relatively simple approximation formula has been devised that predicts the minimum noise figure of a practicaf amplifier design with good accuracy np to frequencies of 9 GHz. Finafly, after the dependence of the noise characteristics on the circnit parameters is d...
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ژورنال
عنوان ژورنال: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
سال: 2012
ISSN: 0885-3010
DOI: 10.1109/tuffc.2012.2502