Analysis and Design of Autonomous Microwave Circuits (Wiley by Almudena Suarez

By Almudena Suarez

Offers simulation innovations that considerably elevate designers' keep watch over over the oscillationin self reliant circuits
This booklet enables a legitimate realizing of the free-running oscillation mechanism, the start-up from the noise point, and the institution of the steady-state oscillation. It bargains with the operation ideas and major features of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers.
Analysis and layout of self reliant Microwave Circuits provides:
An exploration of the most nonlinear-analysis tools, with emphasis on harmonic stability and envelope temporary methods
Techniques for the effective simulation of the commonest self sustaining regime
A presentation and comparability of the most stability-analysis tools within the frequency domain
A exact exam of the instabilization mechanisms that delimit the operation bands of independent circuits
Coverage of thoughts used to dispose of universal varieties of undesired habit, corresponding to spurious oscillations, hysteresis, and chaos
A thorough presentation of the oscillator part noise
A comparability of the most methodologies of phase-noise analysis
Techniques for self sufficient circuit optimization, according to harmonic balance
A attention of alternative layout goals: presetting the oscillation frequency and output strength, expanding potency, enhancing the temporary length, and implementing operation bands
Analysis and layout of self sustaining Microwave Circuits is a worthwhile source for microwave designers, oscillator designers, and graduate scholars in RF microwave layout.

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Extra resources for Analysis and Design of Autonomous Microwave Circuits (Wiley Series in Microwave and Optical Engineering)

Sample text

This is understood by comparison with the behavior of any circuit forced with a sinusoidal generator. A change φ in the phase of the periodic exciting source simply gives rise to the same phase increment in all the circuit variables. Thus, the solution phase shift with respect to this exciting source remains the same as before the application of φ. 12), it is clear that at least two solutions coexist in the oscillator circuit. One is given by V = 0. 2, for which any circuit with no time-varying external sources can be solved.

6 Design of Transistor-Based Oscillators from a Single Observation Port One-port analysis of transistor-based oscillators from a single observation port yields a simple oscillator design. It requires only the choice of a sensitive observation port and identification of a nonlinear active block and linear load network. As stated earlier, the steady-state oscillation condition YT = 0 is fulfilled at any possible observation node. However, the results of startup evaluation using YT (V ∼ = 0, ω) will depend on this observation node and may also be different for admittance analysis in terms of the node voltage, or impedance analysis in terms of the loop current.

For a series connection, an impedance analysis is carried out, in terms of the branch current, as this provides simpler equations. For a parallel connection, an admittance analysis is carried out in terms of the node voltage. Depending on the actual circuit topology, one or another analysis may be more convenient. Here, only the admittance analysis is considered. One based on an impedance description, in terms of the loop current, is totally analogous. A steady-state oscillation with a sinusoidal node voltage v(t) = Vo cos(ωo t + φ) will be assumed initially.

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