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Ruber, R., Wedberg, R., Peterson, T., Dancila, D., Hoang, L. & Eriksson, J. (2019). 400 kW RF Stations Operational Experience: Overview of the operation experience during 2018-2019 with the Itelco-Electrosys and DB Science stations at the FREIA Laboratory. Uppsala universitet
Open this publication in new window or tab >>400 kW RF Stations Operational Experience: Overview of the operation experience during 2018-2019 with the Itelco-Electrosys and DB Science stations at the FREIA Laboratory
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2019 (English)Report (Other academic)
Abstract [en]

We present the operational experience with the Itelco-Electrosys and DB Science 400 kW RF stations installed at the FREIA Laboratory. From the summer of 2018 to the summer of 2019 the stations were used for the test of the spoke cryomodule prototype for ESS. Unfortunately multiple issues with both RF stations delayed or inhibited normal operation. The Itelco-Electrosys station was out-of-operation from October 2018 to June 2019, due to multiple issues, which took a long time to understand and solve.

Place, publisher, year, edition, pages
Uppsala universitet, 2019. p. 24
Series
FREIA Report ; 2019/06
National Category
Accelerator Physics and Instrumentation
Identifiers
urn:nbn:se:uu:diva-397292 (URN)
Available from: 2019-11-19 Created: 2019-11-19 Last updated: 2019-11-25Bibliographically approved
Aziz, I., Dahlback, R., Öjefors, E., Sjogren, K., Rydberg, A. & Dancila, D. (2019). 60 GHz compact broadband antenna arrays with wide-angle beam steering. The Journal of Engineering (8), 5407-5414
Open this publication in new window or tab >>60 GHz compact broadband antenna arrays with wide-angle beam steering
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2019 (English)In: The Journal of Engineering, ISSN 1872-3284, E-ISSN 2051-3305, no 8, p. 5407-5414Article in journal (Refereed) Published
Abstract [en]

Highly integrated multilayered printed circuit board-based patch antenna arrays are proposed in this study for 60 GHz wireless communications. Electromagnetic coupling between two stacked patches is used to achieve the broadband performance. Different structures of single element antennas, two-element antenna arrays and four-element antenna arrays are presented. The two compact four-element antenna arrays show < -10 dB impedance bandwidth of 13 and 14.6% with 12 dBi peak gain. The arrays have the 3 dB gain bandwidth of 9 and 13%. A single column, four-element sub-array is used to design 4 x 16 antenna array. This array delivers 20.8 dBi peak gain with 13% impedance and gain bandwidth. Furthermore, a two-element series fed array is used to realise a 2 x 16 phased antenna array. This array is fed through a 16 x channel radio frequency IC to achieve the beam steering in +/- 50 degrees range.

Place, publisher, year, edition, pages
INST ENGINEERING TECHNOLOGY-IET, 2019
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-393830 (URN)10.1049/joe.2018.5343 (DOI)000482435600007 ()
Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2020-01-08Bibliographically approved
Aziz, I., Öjefors, E., Dahlbäck, R., Rydberg, A., Engblom, G. & Dancila, D. (2019). Broadband Connected Slots Phased Array Feeding a High Gain Lens Antenna at 60 GHz. In: 2019 49th European Microwave Conference (EuMC): . Paper presented at 49th European Microwave Conference, Paris, France, 1-3 October, 2019. (pp. 718-721).
Open this publication in new window or tab >>Broadband Connected Slots Phased Array Feeding a High Gain Lens Antenna at 60 GHz
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2019 (English)In: 2019 49th European Microwave Conference (EuMC), 2019, p. 718-721Conference paper, Oral presentation with published abstract (Refereed)
National Category
Telecommunications
Identifiers
urn:nbn:se:uu:diva-400789 (URN)10.23919/EuMC.2019.8910856 (DOI)
Conference
49th European Microwave Conference, Paris, France, 1-3 October, 2019.
Available from: 2020-01-03 Created: 2020-01-03 Last updated: 2020-03-24Bibliographically approved
Aziz, I., Dancila, D., Dittmeier, S., Siligaris, A., Dehos, C., De Lurgio, P. M., . . . Brenner, R. (2019). Effects of proton irradiation on 60 GHz CMOS transceiver chip for multi-Gbps communication in high-energy physics experiments. The Journal of Engineering (8), 5391-5396
Open this publication in new window or tab >>Effects of proton irradiation on 60 GHz CMOS transceiver chip for multi-Gbps communication in high-energy physics experiments
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2019 (English)In: The Journal of Engineering, ISSN 1872-3284, E-ISSN 2051-3305, no 8, p. 5391-5396Article in journal (Refereed) Published
Abstract [en]

This article presents the experimental results of 17 MeV proton irradiation on a 60 GHz low power, half-duplex transceiver (TRX) chip implemented in 65 nm CMOS technology. It supports short range point-to-point data rate up to 6 Gbps by employing on-off keying (OOK). To investigate the irradiation hardness for high-energy physics (HEP) applications, two TRX chips were irradiated with total ionising doses (TID) of 74 and 42 kGy and fluence of 1.4 x 10(14)N(eq)/cm(2) and 0.8 x 10(14)N(eq)/cm(2) for RX and TX modes, respectively. The chips were characterised by pre- and post-irradiation analogue voltage measurements on different circuit blocks as well as through the analysis of wireless transmission parameters like bit error rate (BER), eye diagram, jitter etc. Post-irradiation measurements have shown certain reduction in performance but both TRX chips have been found operational through over the air measurements at 5 Gbps. Moreover, very small shift in the carrier frequency was observed after the irradiation.

Place, publisher, year, edition, pages
INST ENGINEERING TECHNOLOGY-IET, 2019
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-393829 (URN)10.1049/joe.2018.5402 (DOI)000482435600005 ()
Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2019-10-01Bibliographically approved
Hoang Duc, L., Jobs, M., Lofnes, T., Ruber, R., Olsson, J. & Dancila, D. (2019). Feedback compensated 10 kW solid-state pulsed power amplifier at 352 MHz for particle accelerators. Review of Scientific Instruments, 90(10), Article ID 104707.
Open this publication in new window or tab >>Feedback compensated 10 kW solid-state pulsed power amplifier at 352 MHz for particle accelerators
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2019 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 90, no 10, article id 104707Article in journal (Refereed) Published
Abstract [en]

This paper presents the first results of an in-house developed low-level radio frequency (LLRF) system and a 10 kW solid state power amplifier (SSPA). The design approach for the SSPA is based on eight resonant single-ended kilowatt modules combined using a planar Gysel combiner. Each of the single-ended modules is based on a two-stepped impedance resonant matching, allowing for harmonic suppression, simple design for massive production, and high-performance design. A design methodology to tune SSPA modules for optimum combining efficiency is presented thoroughly in the time domain. We characterize the power droop due to capacitor banks in the time domain. In open loop of compensation, it is about 1 kW within the pulse of peak value 10 kW and a duration of 3.5 ms. This may lead to the beam instability of the accelerator as particles are not provided with the same energy during the pulse. By incorporating our LLRF system, it is demonstrated that the objective of amplitude and phase stability is satisfied, as required in the European Spallation Source proton accelerator. The presented design also offers the advantages of compact form factor, low complexity, and better performance. In closed loop compensation, the variation of amplitude (pulse droop) is measured on the order of 20 W, which is equivalent to 0.2% at 10 kW peak output power.

National Category
Accelerator Physics and Instrumentation
Identifiers
urn:nbn:se:uu:diva-402616 (URN)10.1063/1.5110981 (DOI)000504078300062 ()
Available from: 2020-01-17 Created: 2020-01-17 Last updated: 2020-01-17Bibliographically approved
Hoang Duc, L., Nguyen Dinh The, A., Bach Gia, D., Jobs, M., Ruber, R. & Dancila, D. (2018). A new high-power low-loss air-dielectric stripline Gysel divider/combiner for particle accelerator applications at 352 MHz. IET Control Theory & Applications (5), 264-267
Open this publication in new window or tab >>A new high-power low-loss air-dielectric stripline Gysel divider/combiner for particle accelerator applications at 352 MHz
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2018 (English)In: IET Control Theory & Applications, ISSN 1751-8644, E-ISSN 1751-8652, no 5, p. 264-267Article in journal (Refereed) Published
Abstract [en]

This study presents a new two-way Gysel combiner based on an air-dielectric stripline which allows to handle very high radio-frequency power levels with low-loss suitable for power combination in accelerator applications. The insertion loss of the combiner is 0.1 dB (2%). A thick stripline implementation allows improving the power capability in both continuous wave (CW) and pulsed operation. In addition, a mechanical tuner allows compensating for assembly and fabrication discrepancies. A methodology of designing the Gysel combiner as well as high-power measurements up to 22 kW in pulsed mode are presented. Simulations and measurements are in very good agreement.

National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-334913 (URN)10.1049/joe.2017.0793 (DOI)000436345200003 ()
Projects
ESS
Available from: 2017-11-29 Created: 2017-11-29 Last updated: 2019-11-21Bibliographically approved
Jobs, M., Dancila, D., Eriksson, J. & Ruber, R. (2018). An 8-1 Single-Stage 10-kW Planar Gysel Power Combiner at 352 MHz. IEEE Transactions on Components, Packaging, and Manufacturing Technology, 8(5), 851-857
Open this publication in new window or tab >>An 8-1 Single-Stage 10-kW Planar Gysel Power Combiner at 352 MHz
2018 (English)In: IEEE Transactions on Components, Packaging, and Manufacturing Technology, ISSN 2156-3950, E-ISSN 2156-3985, Vol. 8, no 5, p. 851-857Article in journal (Refereed) Published
Abstract [en]

A compact single-stage 8-1 Gysel Combiner in planar technology for operation with 352-MHz pulses with peak output power of 10 kW has been designed, manufactured, and tested. The module has 0.2-dB insertion loss when operated at nominal power, and the return loss of all ports is 20 dB or better. The module was operated using 3.3-ms pulses at 14-Hz repetition rate without any signs of degradation, thermal heating, or arcing. The new design makes use of inclusions of weakly coupled lines in the common point section of the Gysel combiner. It is possible to adjust port imbalances caused by parasitic line coupling in the system for optimum performance at a given frequency by adjusting the coupling.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Gysel, power combiners, UHF devices
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-356323 (URN)10.1109/TCPMT.2018.2811710 (DOI)000431915800017 ()
Available from: 2018-07-26 Created: 2018-07-26 Last updated: 2018-07-26Bibliographically approved
Book, S., Hoang Duc, L. & Dancila, D. (2018). Design, fabrication and measurement of 1kW Class-E amplifier at 100 MHz. In: : . Paper presented at GigaHertz Symposium, Lund, May 24-25, 2018.
Open this publication in new window or tab >>Design, fabrication and measurement of 1kW Class-E amplifier at 100 MHz
2018 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-369189 (URN)
Conference
GigaHertz Symposium, Lund, May 24-25, 2018
Available from: 2018-12-11 Created: 2018-12-11 Last updated: 2018-12-14Bibliographically approved
Holmberg, M., Dancila, D., Rydberg, A., Hjörvarsson, B., Jansson, U., Marattukalam, J. J., . . . Andersson, J. (2018). Direct metal laser sintering printed millimeter and submillimeter waveguides. In: : . Paper presented at GigaHertz Symposium, Lund, May 24-25 2018.
Open this publication in new window or tab >>Direct metal laser sintering printed millimeter and submillimeter waveguides
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2018 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Telecommunications
Identifiers
urn:nbn:se:uu:diva-369172 (URN)
Conference
GigaHertz Symposium, Lund, May 24-25 2018
Funder
Swedish Foundation for Strategic Research , GMT14-0048
Available from: 2018-12-11 Created: 2018-12-11 Last updated: 2018-12-11Bibliographically approved
Aziz, I., Rydberg, A. & Dancila, D. (2018). Electromagnetically Coupled Multilayer Patch Antenna for 60 GHz Communications. In: : . Paper presented at GigaHertz Symposium, Lund, May 24-25, 2018..
Open this publication in new window or tab >>Electromagnetically Coupled Multilayer Patch Antenna for 60 GHz Communications
2018 (English)Conference paper, Oral presentation only (Refereed)
National Category
Telecommunications
Identifiers
urn:nbn:se:uu:diva-369169 (URN)
Conference
GigaHertz Symposium, Lund, May 24-25, 2018.
Funder
VINNOVA, 2016-01800
Available from: 2018-12-11 Created: 2018-12-11 Last updated: 2019-01-17Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2217-8032

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