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Item type:Publication, Access status: without files , Broadband High-Efficiency Power Amplifiers in 150 nm AlGaN/GaN Technology at Ka-BandThis paper reports the realization and measurements of two power amplifier MMICs at Ka-band. Both MMICs were manufactured using an industrial 0.15 μ m AlGaN/GaN HEMT technology. The power amplifiers MMIC1 and MMIC2 are three-stage designs utilizing a total gate width (TGW) of 5.12 mm and 10.24 mm, respectively. In order to maximize the efficiency, the MMICs exhibit a staging ratio of 1: 2: 6.4. The measurements demonstrate for MMIC18-10.5 W of output power with 28-32% of power-added efficiency (PAE) between 25 and 29 GHz, i.e., over a fractional bandwidth of 15%. In the same frequency band, MMIC2 exhibits more than 15 W of output power and 25% of PAE. The best performance for MMIC2 was measured at 27 GHz and reaches 20 W associated with a PAE of 27%.Publicationtype: Conference Paper92 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Study of Power Amplifier Harmonic Output Termination for two AlGaN/GaN Technologies at K-/Ka-BandThe paper investigates experimentally the effect of harmonic terminations on AlGaN/GaN power amplifiers (PA) performance at K-/Ka-band. Two technologies are compared, a 0.25 µm and 0.1 µm process. In both cases, a harmonic termination increases the achievable output power by about 10 % at the expense of bandwidth, whereas the efficiency is improved only in the first one.Publicationtype: Conference Paper84 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A 5 W AlGaN/GaN power amplifier MMIC for 25-27 GHz downlink applications(IEEE, 2018-03); ; ; ; This work presents the design and analysis of a 5 W power amplifier (PA) MMIC operating between 25 and 27 GHz. The technology used is the 0.1 μm AlGaN/GaN HEMT process of Fraunhofer IAF. To benchmark its performance around 26 GHz two preliminary designs are synthesized and analyzed. The measured results demonstrate for the final MMIC up to 5.2 W of output power associated with 32 % of power added efficiency (PAE). A peak PAE of 35 % was observed in continuous-wave (CW) operation at a drain supply voltage of 15 V.Publicationtype: Conference Paper199 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Active multi-feed satcom systems with GaN SSPA at K-band(IEEE, 2016-03); ; ; ; The ongoing developments of satellite antenna technology, mainly of multiple-feed-per-beam (MFB) concepts, combined with advanced compound semiconductor and packaging technologies that provide the building blocks for a new generation of K-band satellites, are reported. This paper proposes a next-generation MFB application scenario using the advantages of both new antenna and solid-state power amplifier concepts.Publicationtype: Conference Paper100 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A K-band multiple-feed-per-beam transmitter with GaN-power amplifiersPublicationtype: Conference Paper179