Jorge Hernández - Academia.edu (original) (raw)
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Papers by Jorge Hernández
IEEE Transactions on Microwave Theory and Techniques, 2001
In this paper, we present a new parallel-coupled-line microstrip bandpass filter with suppressed ... more In this paper, we present a new parallel-coupled-line microstrip bandpass filter with suppressed spurious passband. Using a continuous perturbation of the width of the coupled lines following a sinusoidal law, the wave impedance is modulated so that the harmonic passband of the filter is rejected while the desired passband response is maintained virtually unaltered. This strip-width perturbation does not require the filter parameters to be recalculated and, this way, the classical design methodology for coupled-line microstrip filters can still be used. At the same time, the fabrication of the resulting filter layout does not involve more difficulties than those for typical coupled-line microstrip filters. To test this novel technique, order-3 Butterworth bandpass filters have been designed at 2.5 GHz with a 10% fractional bandwidth and different values of the perturbation amplitude. It is shown that for a 47.5% sinusoidal variation of the nominal strip width, a harmonic rejection of more than 40 dB is achieved in measurement while the passband at 2.5 GHz is almost unaltered.
El artículo que se escogió para este trabajo se centra en la determinación de un elemento en espe... more El artículo que se escogió para este trabajo se centra en la determinación de un elemento en específico, Vanadio, a partir de un tipo de roca de génesis ígnea a metamórfica denominada asfaltita, las cuales son un derivado solido del petróleo.
IEEE Transactions on Microwave Theory and Techniques, 2001
In this paper, we present a new parallel-coupled-line microstrip bandpass filter with suppressed ... more In this paper, we present a new parallel-coupled-line microstrip bandpass filter with suppressed spurious passband. Using a continuous perturbation of the width of the coupled lines following a sinusoidal law, the wave impedance is modulated so that the harmonic passband of the filter is rejected while the desired passband response is maintained virtually unaltered. This strip-width perturbation does not require the filter parameters to be recalculated and, this way, the classical design methodology for coupled-line microstrip filters can still be used. At the same time, the fabrication of the resulting filter layout does not involve more difficulties than those for typical coupled-line microstrip filters. To test this novel technique, order-3 Butterworth bandpass filters have been designed at 2.5 GHz with a 10% fractional bandwidth and different values of the perturbation amplitude. It is shown that for a 47.5% sinusoidal variation of the nominal strip width, a harmonic rejection of more than 40 dB is achieved in measurement while the passband at 2.5 GHz is almost unaltered.
El artículo que se escogió para este trabajo se centra en la determinación de un elemento en espe... more El artículo que se escogió para este trabajo se centra en la determinación de un elemento en específico, Vanadio, a partir de un tipo de roca de génesis ígnea a metamórfica denominada asfaltita, las cuales son un derivado solido del petróleo.