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

By Almudena Suarez

Provides simulation suggestions that considerably bring up designers' keep an eye on over the oscillationin independent circuits
This ebook allows 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 rules and major features of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers.
Analysis and layout of self sustaining Microwave Circuits provides:
An exploration of the most nonlinear-analysis tools, with emphasis on harmonic stability and envelope brief methods
Techniques for the effective simulation of the most typical self reliant regime
A presentation and comparability of the most stability-analysis equipment within the frequency domain
A precise exam of the instabilization mechanisms that delimit the operation bands of self sustaining circuits
Coverage of suggestions used to get rid of universal varieties of undesired habit, reminiscent of 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 reliant circuit optimization, in response to harmonic balance
A attention of alternative layout targets: presetting the oscillation frequency and output strength, expanding potency, enhancing the brief period, and enforcing operation bands
Analysis and layout of self reliant Microwave Circuits is a precious source for microwave designers, oscillator designers, and graduate scholars in RF microwave layout.

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

Sample text

4 One-port representation of a free-running oscillator. 5 Schematic representation of a transistor-based oscillator. A one-port description is used for the block, consisting of the transistor, its termination at port 1, and the feedback elements. the transistor often requires an additional parallel or series feedback network to exhibit negative resistance about the oscillation frequency that is desired [15]. The transistor is loaded with an impedance ZL containing the resistive load from which the oscillation output power is extracted.

4 V. When representing YT (V , fo ) and YT (Vo , f ) in the plane defined by Re[YT ] and Im[YT ], Fig. 11 is obtained. The solid-line curve corresponds to the function YT (V , fo ). The dashed-line curve corresponds to the function YT (Vo , f ). 10 FET-based oscillator. Determination of the derivatives Re[∂YT /∂fo ] and Im[∂YT /∂fo ] about the free-running oscillation point Vo , fo using a voltage auxiliary generator. 11 Representation of the curves YT (V , fo ) and YT (Vo , f ) on the plane defined by Re[YT ] and Im[YT ].

It is possible to reduce the influence of the nonlinear block on the resonance frequency by adding a series capacitance Cs (not represented in the circuit schematic), such that the resonance frequency is determined primarily by the linear load circuit. Provided that Cs is small enough, the total capacitance (including the one at the output of the nonlinear block Cout ) will be CT = Cs Cout /(Cs + Cout ) ∼ = Cs , much smaller than the original value Cout . Because Ls = 1/(Cs ω2o ) to maintain the same resonance frequency, the quality factor Q of the series load resonator must increase significantly, giving a high value for the derivative ∂YTi (ωo )/∂ω.

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