Kilowatt‐level power amplifier in a single‐ended architecture at 352 MHz

Haapala, Linus; Eriksson, Anders; Duc, Long Hoang; Dancila, Dragos

doi:10.1049/el.2016.2117

Cited by 14 publications

(11 citation statements)

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“…During tests, a total output peak power of 10.5 kW has been measured. The amplifier combines SSPA modules at 1.25 kW each, built around a commercially available LDMOS transistor in a single-ended architecture with 71% efficiency in pulsed operation [121]. A feedback-controlled RF power flatness compensation was also demonstrated at a 10 kW level [122].…”

Section: Spoke Cavity Solid-state Power Amplifiers (Sspas)mentioning

confidence: 99%

The European Spallation Source neutrino super-beam conceptual design report

Alekou

Baussan

Bhattacharyya

et al. 2022

Eur. Phys. J. Spec. Top.

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A design study, named $${\text {ESS}}\nu {\text {SB}}$$ ESS ν SB for European Spallation Source neutrino Super Beam, has been carried out during the years 2018–2022 of how the 5 MW proton linear accelerator of the European Spallation Source under construction in Lund, Sweden, can be used to produce the world’s most intense long-baseline neutrino beam. The high beam intensity will allow for measuring the neutrino oscillations near the second oscillation maximum at which the CP violation signal is close to three times higher than at the first maximum, where other experiments measure. This will enable CP violation discovery in the leptonic sector for a wider range of values of the CP violating phase $$\delta _{{\mathrm{CP}}}$$ δ CP and, in particular, a higher precision measurement of $$\delta _{{\mathrm{CP}}}$$ δ CP . The present Conceptual Design Report describes the results of the design study of the required upgrade of the ESS linac, of the accumulator ring used to compress the linac pulses from 2.86 ms to 1.2 μs, and of the target station, where the 5 MW proton beam is used to produce the intense neutrino beam. It also presents the design of the near detector, which is used to monitor the neutrino beam as well as to measure neutrino cross sections, and of the large underground far detector located 360 km from ESS, where the magnitude of the oscillation appearance of $$\nu _{e }$$ ν e from $$\nu _{\mu }$$ ν μ is measured. The physics performance of the $${\text {ESS}}\nu {\text {SB}}$$ ESS ν SB research facility has been evaluated demonstrating that after 10 years of data-taking, leptonic CP violation can be detected with more than 5 standard deviation significance over 70% of the range of values that the CP violation phase angle $$\delta _{{\mathrm{CP}}}$$ δ CP can take and that $$\delta _{{\mathrm{CP}}}$$ δ CP can be measured with a standard error less than 8° irrespective of the measured value of $$\delta _{{\mathrm{CP}}}$$ δ CP . These results demonstrate the uniquely high physics performance of the proposed $${\text {ESS}}\nu {\text {SB}}$$ ESS ν SB research facility.

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Section: Spoke Cavity Solid-state Power Amplifiers (Sspas)mentioning

confidence: 99%

The European Spallation Source neutrino super-beam conceptual design report

Alekou

Baussan

Bhattacharyya

et al. 2022

Eur. Phys. J. Spec. Top.

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“…The ongoing collaboration with ESS resulted in several publications on a compact 10 kW solid-state RF power amplifier at 352 MHz [11], with a total output peak power of 10.5 kW. The amplifier combines 8-kW level SSPA modules, built around a commercially available LDMOS transistor in a single-ended architecture, each module characterized by and efficiency of 71% in pulsed operation [12]. A feedback-controlled RF power flatness compensation at a 10 kW level was also demonstrated [13].…”

Section: Sspa Development At Freiamentioning

confidence: 99%

The conceptual design of the high-efficiency 400 kW solid-state power station at 352 MHz for the European spallation source

Mohadeskasaei,

Dancila

2024

Int. J. Microw. Wireless Technol.

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This paper introduces an innovative conceptual design of a 400 kW solid-state power amplifier (SSPA) station and presents preliminary measurements for the key components. Recent advancements and benefits of solid-state technology have made the prospect of replacing vacuum tubes increasingly appealing. Historically, a significant challenge was the limited output power capacity of individual solid-state transistors, necessitating the integration of numerous units to generate high-power microwave signals in the range of hundreds of kilowatts. However, modern transistors capable of producing over 2 kW of output power have emerged, facilitating this transition. Another weak point was low power efficiency in high-power operating mode. The advanced rugged technology (ART) of solid-state devices enables the utilization of these transistors in nonlinear and switching operating classes, thereby enabling the creation of high-efficiency high-power amplifiers. In this conceptual design, 264 SSPA modules based on ART, each with a power output of 1.6 kW, are combined. The measurements revealed a single SSPA capable of delivering up to 2 kW output power with a power efficiency of 73% at frequency of 352 MHz. Due to the minimal losses during module combination and working SSPA in Class-C operation mode, the power efficiency of the station is expected to closely mirror that of a single module.

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“…In this network, TL 1 and TL 2 have the same impedance and the matching capacitors provide good performance regarding the input return loss (RL), as shown in Ref. . The output network used in this amplifier is also shown in Figure .…”

Section: Amplifier Designmentioning

confidence: 99%

“…The details of the design and implementation can be found in Refs. . The amplifier can operate in both continuous wave (CW) and pulsed modes at 352 MHz.…”

Section: Amplifier Designmentioning

confidence: 99%

Time domain characterization of high power solid state amplifiers for the next generation linear accelerators

Duc

Bhattacharyya²,

Goryashko³

et al. 2017

Micro & Optical Tech Letters

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90-degree phase also provides the possibility for approximately equal radiation level of two resonant slot cavities, then ensuring the similarity of the radiation patterns in the whole MFB or HFB. | C ONCL US I ONSDensely attaching slot branches to a slot radiator of a slotline feedline, the multicavity-coupled antenna with wide multiband property is designed. Its multiple frequency performance stems from the loaded slot branches and the wideband feature is caused by the slot cavity coupling. The proposed antenna can keep stable radiation patterns in each operating band and, thus, is suitable for the indoor base station systems. ACKNOWLEDGMENT AbstractThis paper presents the time-domain characterization of high power pulsed solid state amplifiers to be used for linear accelerator applications. The study comprises

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Kilowatt‐level power amplifier in a single‐ended architecture at 352 MHz

Cited by 14 publications

References 1 publication

The European Spallation Source neutrino super-beam conceptual design report

The European Spallation Source neutrino super-beam conceptual design report

The conceptual design of the high-efficiency 400 kW solid-state power station at 352 MHz for the European spallation source

Time domain characterization of high power solid state amplifiers for the next generation linear accelerators

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