Analysis of Odd-Mode Parametric Instabilities at Fundamental Frequency in an X-Band MMIC Power Amplifier

Dellier, S.; Mori, L.; Collantes, J.M.; Anakabe, A.; Campbell, Carol

doi:10.1109/csics.2016.7751028

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The structure was fine re-tuned by means of electromagnetic simulations of the entire passive structures. Finally, the odd-mode and parametric oscillations were analyzed by referring to Ohtomo test [28] and by using the STAN tool (pole-zero analysis package described in [29]). The former, based on the evaluation of loop gains, requires avoiding the encirclement of the point (1,0), as reported in Fig.…”

Section: Design Stepsmentioning

confidence: 99%

A high efficiency 10W MMIC PA for K-b and satellite communications

Colantonio

Giofrè

Vitobello³

et al. 2021

Int. J. Microw. Wireless Technol.

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This paper discusses the design steps and experimental characterization of a monolithic microwave integrated circuit (MMIC) power amplifier developed for the next generation of K-band 17.3–20.2 GHz very high throughput satellites. The technology used is a commercially available 100-nm gate length gallium nitride on silicon process. The chip was developed taking into account the demanding constraints of the spacecraft and, in particular, carefully considering the thermal constraints of such technology, in order to keep the junction temperature in all devices below 160°C in the worst-case condition (i.e., maximum environmental temperature of 85°C). The realized MMIC, based on a three-stage architecture, was first characterized on-wafer in pulsed regime and, subsequently, mounted in a test-jig and characterized under continuous wave operating conditions. In 17.3–20.2 GHz operating bandwidth, the built amplifier provides an output power >40 dBm with a power added efficiency close to 30% (peak >40%) and 22 dB of power gain.

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Section: Design Stepsmentioning

confidence: 99%

A high efficiency 10W MMIC PA for K-b and satellite communications

Colantonio

Giofrè

Vitobello³

et al. 2021

Int. J. Microw. Wireless Technol.

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show abstract

“…This technique has the benefit of being applicable to dc, small-signal, and large-signal stability analyses. The stability analysis is based on determining the poles of a closed-loop transfer function resulting in linearizing the system around a steady state regime [15,16,19]. A pole at the fundamental frequency with a positive real part, located in the right half plane (RHP) of the transfer function, reveals the unstable behaviour of the amplifier.…”

Section: Stability Analysis Of Power Amplifiersmentioning

confidence: 99%

“…Such oscillations are not always observable by either the well-known harmonic balance technique or other kinds of simulation methods. So far, in published literature, the only technique to predict the probable parametric oscillations is finding the zero-pole(s) of the amplifier transfer function [15][16][17][18][19]. The real part of all poles must be negative at the desired frequency and power range to avoid parametric oscillations.…”

Section: Introductionmentioning

confidence: 99%

New Stabilization Technique to Prevent Parametric Oscillations in a 35 W C-Band Algan/Gan Mmic High Power Amplifier

Gholami¹,

Yagoub²

2018

PIER C

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In this paper, a novel stabilization scheme to prevent parametric oscillations in power amplifiers is presented. Based on a new oscillation detection approach, the inductive degeneration technique was used, for the first time, to successfully stabilize a high-power amplifier and prevent parametric oscillations. A 0.15 µm AlGaN/GaN Microwave Monolithic Integrated Circuit high power amplifier operating at 5.8 GHz with 10% fractional bandwidth was designed and successfully stabilized using this approach. The proposed (4.7 × 3.7) mm 2 three-stage amplifier achieves a saturated output power of 35 W with 29% power added efficiency and a large-signal gain of 26 dB.

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“…A very common and thoroughly studied case of parametric odd-mode oscillations is at sub-harmonic divide-by-two (f 0 /2) frequencies [6], [12], [20], [22], but odd-mode oscillations at the fundamental operating frequency (f 0 ) have also been reported [23]. They are observed as a sharp decrease in the output power, P out , with respect to the input power, P in , on a drive-up curve, and a sudden gain expansion or compression in the gain curve.…”

Section: Introductionmentioning

confidence: 99%

Direct ${E}$ -Field Measurement and Imaging of Oscillations Within Power Amplifiers

Urbonas

Kim

Aaen

2019

IEEE Trans. Instrum. Meas.

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We present for the first time a measurement system that is capable of directly detecting and identifying the physical location of an oscillation within RF and microwave power amplifiers. The method uses a combined external electrooptic, non-linear vector network analyzer, and vector load-pull measurement system, which allows the measurement of crossfrequency phase-coherent multi-harmonic vector electric fields above the transistor with an 8 µm spatial resolution and 20 MHz-40 GHz bandwidth. Raster scans above the amplifier allow the time-domain electric fields to be animated and superimposed on top of the amplifier image enabling immediate identification of any oscillations by direct inspection. The method is first demonstrated on a low power amplifier composed of two parallel 0.1-W pHEMT transistors that is intentionally designed to have an odd-mode oscillation. The applicability of the method is further demonstrated by measuring and animating in-package parametric odd-mode oscillations within a 260-W laterally diffused metal-oxide-semiconductor (LDMOS) transistor operating at 2.2 GHz under pulsed RF conditions with 10 µs pulses and 10% duty cycle. The measurement and identification technique is applicable to all semiconductor devices as the external electric field is non-invasively measured above the amplifier.

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Analysis of Odd-Mode Parametric Instabilities at Fundamental Frequency in an X-Band MMIC Power Amplifier

Cited by 6 publications

References 5 publications

A high efficiency 10W MMIC PA for K-b and satellite communications

A high efficiency 10W MMIC PA for K-b and satellite communications

New Stabilization Technique to Prevent Parametric Oscillations in a 35 W C-Band Algan/Gan Mmic High Power Amplifier

Direct ${E}$ -Field Measurement and Imaging of Oscillations Within Power Amplifiers

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