| 1. |
- Beuerle, Bernhard, 1983-, et al.
(författare)
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Integrating InP MMICs and Silicon Micromachined Waveguides for sub-THz Systems
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- A novel co-designed transition from InP monolithic microwave integrated circuits to silicon micromachined waveguides is presented. The transition couples a microstrip line to a substrate waveguide sitting on top of a vertical waveguide. The silicon part of the transition consists of a top and a bottom chip, fabricated in a very low-loss silicon micromachined waveguide technology using silicon on insulator wafers. The transition has been designed, fabricated and characterized for 220–330 GHz in a back-to-back configuration. Measured insertion loss is 3–6 dB at 250–300 GHz, and return loss is in excess of 5 dB.
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| 2. |
- Beuerle, Bernhard, et al.
(författare)
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Integrating InP MMICs and Silicon Micromachined Waveguides for sub-THz Systems
- 2023
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Ingår i: IEEE Electron Device Letters. - 0741-3106 .- 1558-0563. ; 44:10, s. 1800-1803
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Tidskriftsartikel (refereegranskat)abstract
- A novel co-designed transition from InP monolithic microwave integrated circuits to silicon micromachined waveguides is presented. The transition couples a microstrip line to a substrate waveguide sitting on top of a vertical waveguide. The silicon part of the transition consists of a top and a bottom chip, fabricated in a very low-loss silicon micromachined waveguide technology using silicon on insulator wafers. The transition has been designed, fabricated and characterized for 220-330 GHz in a back-to-back configuration. Measured insertion loss is 3-6 dB at 250-300 GHz, and return loss is in excess of 5 dB.
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| 3. |
- Beuerle, Bernhard, et al.
(författare)
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Integrating InP MMICs and Silicon Micromachined Waveguides for Sub-THz Systems
- 2023
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Ingår i: IEEE Electron Device Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 0741-3106 .- 1558-0563. ; 44:10, s. 1800-1803
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Tidskriftsartikel (refereegranskat)abstract
- A novel co-designed transition from InP monolithic microwave integrated circuits to silicon micromachined waveguides is presented. The transition couples a microstrip line to a substrate waveguide sitting on top of a vertical waveguide. The silicon part of the transition consists of a top and a bottom chip, fabricated in a very low-loss silicon micromachined waveguide technology using silicon on insulator wafers. The transition has been designed, fabricated and characterized for 220 GHz to 330 GHz in a back-to-back configuration. Measured insertion loss is 3 dB to 6 dB at 250 GHz to 300 GHz , and return loss is in excess of 5 dB.
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| 4. |
- Cheng, Shi, et al.
(författare)
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Switched beam antenna based on RF MEMS SPDT switch on quartz substrate
- 2009
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Ingår i: IEEE Antennas and Wireless Propagation Letters. - 1536-1225 .- 1548-5757. ; 8, s. 383-386
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Tidskriftsartikel (refereegranskat)abstract
- This letter demonstrates a 20-GHz radio frequency microelectromechanical system (RF MEMS)-based electrically switchable antenna on a quartz substrate. Two quasi-Yagi antenna elements are monolithically integrated with a single-pole double-throw (SPDT) MEMS switch router network on a 21 mm x 8 mm chip. Electrical beam steering between two opposite directions is achieved using capacitive MEMS SPDT switches in the router. Port impedance and radiation patterns are studied numerically and experimentally. Measured results show that the switched beam antenna features a 27% impedance bandwidth (S-11 = -10 dB), a gain of 4.6 dBi, and a front-to-back ratio of 14 dB at 20 GHz when the control voltage is applied to one of the switch pairs of the SPDT switch.
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| 5. |
- Dancila, Dragos, et al.
(författare)
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Wide Band On-Chip Slot Antenna with Back-Side Etched Trench for W-band Sensing Applications
- 2013
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Ingår i: 2013 7th European Conference on Antennas and Propagation (EuCAP). - 9788890701832 ; , s. 1576-1579
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Konferensbidrag (refereegranskat)abstract
- This paper presents the design and characterization of a highly integrated, wideband on-chip radiometer, composed of a slot antenna, RF-MEMS Dicke Switch, LNA and a wideband power detector. The highly integrated single-chip RF front-end is dedicated for broadband sensing up to 110 GHz. Both antenna and radiometer are fabricated in a 0.25 mu m SiGe BiCMOS process. The antenna design takes benefit of the back-side etched trench, offered by the technology. This is used to reduce losses due to the presence of the low resistivity silicon substrate. Additionally, the trench is specially shaped, as to improve the wideband matching of the antenna. The on-chip slot antenna design covers a wide bandwidth (70-110 GHz) with 0 dBi gain and 64% efficiency, both simulated at 94 GHz. The measured bandwidth spans 85 to 105 GHz. The W-band SiGe detector circuit has close to 20 GHz of operational bandwidth (S-11 <=-10 dB at 75-92 GHz) and presents a responsivity of 3-5kV/W (NEP=10-16 pW/Hz(1/2)) at 83-94 GHz.
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| 6. |
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| 7. |
- Ekbrand, Hans, et al.
(författare)
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Injury events in residential areas – risk groups and etiological factors for falling, cutting and poisoning
- 2016
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Ingår i: Injury Prevention. - : BMJ Publishing Group Ltd. - 1353-8047 .- 1475-5785.
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Konferensbidrag (refereegranskat)abstract
- Background: Injury events in homes constitute a major social problem. Falling, cutting and poisoning make up 85 per cent of all injury events in residential areas.This study is based on a unique data set that includes several million cases of falling, cutting and poisoning in Sweden during the period 1990-2013 which lead to either to death, hospitalisation or to a visit to a health care provider, and a control group randomly selected from the population.Three riskgroups are given special attention in the analysis: (1) old people, (2) children, (3) persons with disabilities and or long term illnesses.Methods: Multilevel regression analysis and geographical information systems, GIS.Results: The results show the probability for each riskgroup to be exposed to each type of injury event, and how this probability varies with place (GIS), previous exposure, type of household, socioeconomic status and type of housing.Conclusions: The project is ongoing. Our cross-sectorial group has demonstrated the importance of injury epidemiology as a guiding principle in architectural design, particularly for high-risk groups.
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| 8. |
- Ekbrand, Hans, 1972, et al.
(författare)
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The rise and fall of injury prevention programs in Sweden.
- 2016
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Ingår i: Oral presentation at the 2ned Nordic Meeting, Society for Risk Analysis Europe, in Gothenburg 14-15 november, 2016..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper is a spin‐off from a project about injury events ‐ falling, cutting and poisoning ‐ in residental settings.
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