Download Analysis And Design Of Autonomous Microwave Circuits by Almudena Suarez PDF

By Almudena Suarez

Provides simulation concepts that considerably bring up designers' keep watch over over the oscillationin self sustaining circuits

This publication enables a valid realizing of the free-running oscillation mechanism, the start-up from the noise point, and the institution of the steady-state oscillation. It offers with the operation rules and major features of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers.

Analysis and layout of self sufficient Microwave Circuits provides:

  • An exploration of the most nonlinear-analysis equipment, with emphasis on harmonic stability and envelope brief methods

  • Techniques for the effective simulation of the commonest self sustaining regimes

  • A presentation and comparability of the most stability-analysis tools within the frequency domain

  • A specific exam of the instabilization mechanisms that delimit the operation bands of self reliant circuits

  • Coverage of recommendations used to put off universal forms of undesired habit, similar 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 sustaining circuit optimization, according to harmonic balance

  • A attention of alternative layout goals: presetting the oscillation frequency and output strength, expanding potency, enhancing the brief period, and enforcing operation bands

Analysis and layout of self sufficient Microwave Circuits is a precious source for microwave designers, oscillator designers, and graduate scholars in RF microwave design.

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Example text

It must contain resistive elements). 2, an oscillator is ruled by a set of nonlinear differential equations that can only be accurately solved using numerical techniques. Time-domain analysis makes it possible to obtain the entire time evolution of the circuit variables, including transient and steady state. In frequency-domain analysis, each variable is represented by a Fourier series v(t) = k Vk ej kωt , with constant complex coefficients Vk and constant ω, so only the steady-state regime can be determined.

VN (t), φ1 (t), . . , φN (t). The perturbed system will be derived by expanding the vector function H in a first-order Taylor series about the steady-state oscillation (V o , ωo ). 28) 24 OSCILLATOR DYNAMICS where [YT ]Tk is a row matrix agreeing with the kth row of [YT ]. The perturbed frequency will be given by j ωo + s. 20). Thus, the derivation of [YT ]Tk with respect to frequency will give rise to terms of the form ∂Ykm ∂ω −j V˙m (t) + Vm φ˙ m (t) Vm ej φm , where k and m refer to the particular component of the kth row of the [YT ] matrix.

33) = Vk + ZL (kωo )Ik (V−N , . . , Vo , . . , VN ) = 0 .. HN = VN + ZL (N ωo )IN (V−N , . . , Vo , . . 4 FREQUENCY-DOMAIN FORMULATION OF AN OSCILLATOR CIRCUIT 33 where Hk are complex error functions. Note that the bias sources should be included in the dc term. 33). The total number of equations is 2N + 1, as each harmonic function Hk has real and imaginary parts, except the one corresponding to dc, given by Ho , which is real valued. 33) constitutes the harmonic balance formulation of the oscillator circuit, containing a single nonlinearity of current type only.

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