| 1. |
- Liao, Wan-Chun, 1985, et al.
(författare)
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A Ka-Band Active Integrated Antenna for 5G Applications: Initial Design Flow
- 2018
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Ingår i: 2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC).
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Konferensbidrag (refereegranskat)abstract
- Initial technology and design decisions are presented as part of a design flow to realize an active integrated antenna (array) element for 5G applications at Ka-band. The objective is to synthesize an antenna impedance that directly matches the amplifier optimal load impedance in order to maximize the overall efficiency of the integrated antenna-amplifier system while attaining an output power in the range of 15–25 dBm. A strategy to subsequently co-optimize this combined system is also discussed. Direct matching overcomes the insertion losses and bandwidth limitations of impedance-transforming networks, obviates the use of a standard 50-Ohm reference impedance, and potentially results in more cost-effective, more compact, and better performing active antenna designs in general.
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| 2. |
- Wettergren, Björn, et al.
(författare)
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Child Health Systems in Sweden
- 2016
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Ingår i: Journal of Pediatrics. - New York, USA : Elsevier. - 0022-3476 .- 1097-6833. ; 177:Suppl., s. S187-S202
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Tidskriftsartikel (refereegranskat)abstract
- On a national level, several factors are responsible for Sweden's leading position in achieving the excellent health of children because Sweden has experienced a long history of peace and success in establishing a parliamentary democracy throughout the 20th century. Among the different sectors of society, Sweden has been able to focus on prevention and health promotion. The Swedish health care system is publicly financed based on local taxation. Pediatricians working in secondary and tertiary care are employed by the public sector, whereas family physicians are employed by both the private and public sectors. The pediatric departments at county and university levels provide a high quality of inpatient care for neonates and children. The county hospital pediatric departments typically include one neonatal ward and one ward for older children. Subspecialization exists even at the county level, and there is close cooperation between the county level and subspecialist units at the university level. Within the primary care sector, most children receive care from family physicians. The majority of family physicians have completed 3 months of pediatrics in their basic training program. In the more densely populated areas there are also pediatric ambulatory care centers working mostly with referrals from the family physicians. Preventive care is carried out at midwife-led maternity health centers, nurse-led Child Health Centers, and nurse-led school health care settings and reach almost everyone (99%). All health care for children and adolescents is free of charge up to 18 years of age.
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| 3. |
- Wettergren, Kristina, 1974, et al.
(författare)
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Unravelling the Dependence of Hydrogen Oxidation Kinetics on the Size of Pt Nanoparticles by in Operando Nanoplasmonic Temperature Sensing
- 2015
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Ingår i: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 15:1, s. 574-580
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Tidskriftsartikel (refereegranskat)abstract
- We use a noninvasive nanoscale optical-temperature measurement method based on localized surface plasmon resonance to investigate the particle size-dependence of the hydrogen oxidation reaction kinetics on model supported Pt nanocatalysts at atmospheric pressure in operando. With decreasing average nanoparticle size from 11 down to 3 nm, the apparent reaction activation energy is found to increase from 0.5 up to 0.8 eV. This effect is attributed to an increase of the fraction of (100)-facet and edge and corner sites and their increasingly important role in the reaction with decreasing particle size.
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