Precise and simple DC-electrothermal characterization of MMIC power amplifiers

Torregrosa‐Penalva, Germán; López, A.; Blanco-del-Campo, A.; Ortega-González, Francisco Javier

doi:10.1109/stherm.2003.1194347

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The procedure suggested in [9] was employed to obtain R th ϭ 45.4ЊC/W for this power amplifier (R th also includes the thermal effects due to its mounting structure). Measurements are shown in Figure 2 for three different gate-to-source voltages V g ϭ (Ϫ1.0, Ϫ1.1, Ϫ1.2) V, and for a wide set of room temperatures ranging from T amb ϭ 80.0ЊC to T amb ϭ Ϫ5.0ЊC.…”

Section: Measurementsmentioning

confidence: 99%

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A method to obtain the isothermal static DC curves of microwave FET power amplifiers

Torregrosa‐Penalva

López

Blanco-del-Campo

2004

Micro & Optical Tech Letters

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30 wavelength converters to reach PLR ϭ 10 Ϫ5 . In the MOPS with F ϭ 2 or F ϭ 4, the number of wavelength converters can be reduced to 22 and 16, respectively. Figure 4 demonstrates the performance gain of the MOPS when the switch is equipped with shared FDLs. Comparisons are made between the single-fiber switch and the MOPS where F ϭ 4. We see that the performance is significantly improved or, equivalently, the number of FDLs required to achieve the same performance is reduced. For example, when a ϭ 0.3, the MOPS with four FDLs performs nearly the same as the single-fiber switch with 16 FDLs. Moreover, the MOPS with 16 FDLs outperforms single-fiber switch with full wavelength conversion in most cases. CONCLUSIONIn this paper, we have proposed the MOPS scheme and studied its improved performance in comparison to the traditional single-fiber switch. It has been demonstrated that although the MOPS with no additional contention resolution components cannot easily perform as well as a switch with full wavelength conversion, however, the MOPS significantly reduces the number of wavelength converters and/or FDLs in switches with shared wavelength conversion and/or shared optical buffering configurations, while achieving a lower packet-loss rate.ABSTRACT: This paper proposes a method to obtain the isothermal static DC curves of microwave FET power amplifiers, avoiding the use of pulsed measurements and accounting for the self-heating problem in this type of device. The method requires the determination of the thermal resistance of the device under test and the measurement of its static DC curves under different ambient temperatures.ABSTRACT: A wideband microstrip patch antenna with tilted L-probe is proposed and studied. Given a tilted L-shaped probe and substrate height of about 16.8% of the wavelength, a bandwidth of 37.1% is obtained in the design, and the in-band S 11 parameter is improved. The radiation pattern is stable across the band and an average gain of 7.93 dBi is achieved.

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Section: Measurementsmentioning

confidence: 99%

“…The thermal resistance of the device under test must also be determined. This can be done by following any of the multiple approaches at hand [9,10]. To illustrate the usefulness of the suggested method, it was applied to a commercial X-band MMIC FET power amplifier.…”

Section: Introductionmentioning

confidence: 99%

A method to obtain the isothermal static DC curves of microwave FET power amplifiers

Torregrosa‐Penalva

López

Blanco-del-Campo

2004

Micro & Optical Tech Letters

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“…El método de caracterización electro-térmica propuesto sigue el diagrama de flujo que se aprecia en la figura 10.1 y ha sido descrito en [149,150,151]. dos primeros pasos en que se divide el método consisten, por un lado, en la obtención de un modelo de fuente de corriente para un transistor individual de los que forman el MMIC de potencia y, por otro, en el cálculo de la matriz de resistencias térmicas, que relaciona los consumos en los transistores con sus temperaturas internas, empleando el simulador térmico descrito en el capítulo 6.…”

Section: Parte IVunclassified

Caracterización eléctrica y térmica de amplificadores MMIC de potencia

Penalva¹

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El trabajo de tesis doctoral que se presenta aborda diferentes aspectos relativos a la caracterización eléctrica y térmica de amplificadores MMIC de potencia. Los resultados obtenidos a partir del estudio teórico y experimental llevado a cabo han contribuido a un mejor III entendimiento del comportamiento de los amplificadores MMIC de potencia empleados, así como a un mejor diseño de los prototipos de transmisor desarrollados.

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