Nuevas herramientas para el diseño de osciladores de microondas de alta eficiencia

A new systematic method is presented for the design of high-efficiency microwave oscillators. It is based on the control of the transistor output-voltage waveform, through the combined use of a nonperturbing auxiliary generator and a substitution generator. The nonperturbing generator sets the oscillation frequency at the desired value during the entire design process. The combination of the two generators allows obtaining a quasisquare output-voltage waveform, with optimum harmonic components to maximize the efficiency. Attention is paid to the stability and phase noise of the implemented oscillator, which are analyzed versus technological parameters. A 6-GHz oscillator has been designed using these techniques, with good experimental results

Técnica de optimización no lineal para osciladores en software comercial

In this article a nonlinear optimization technique is presented for oscillators design in commercial Harmonic Balance Software. The technique is based on the insertion of a non-perturbing auxiliary generator in the circuit topology of the oscillator. Optimization of the oscillation frequency, the output power and the quality-factor is obtained

Optimización no lineal de mezcladores autooscilantes

New non-linear optimisation techniques for the design of self-oscillating mixers are presented. The techniques enable fixing the self-oscillation frequency and selecting the optimum self-oscillating amplitude for maximum conversion gain. Using bifurcation-theory concepts, it has been possible to increase the range with self-oscillating-mixer operation. The new techniques have been applied to the design and simulation of a 5.5GHz-0.5GHz down-converter obtaining very good agreement with the experimental results