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Item type:Publication, Access status: without files , A 41.5 dBm Broadband AlGaN/GaN HEMT Balanced Power Amplifier at K-BandThis paper describes the design and characterization of a broadband balanced power amplifier (BPA) MMIC at K-band. The utilized technology is the 0.25μm AlGaN/GaN HEMT process provided by Fraunhofer IAF. The BPA is designed as a two-stage power amplifier (PA) with a total gate width (TGW) of 4.32mm. More than 41.5dBm of output power with a power-added efficiency (PAE) greater than 21% are demonstrated between 21 and 23GHz. Furthermore, the BPA exhibits a maximum saturated output power of 17W associated with 22% of PAE at 22.5GHz. A peak PAE of 30% is realized at a drain supply voltage of 28V.Publicationtype: Conference Paper61 - Some of the metrics are blocked by yourconsent settings
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 Paper91 - 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