| 1. |
- Bryllert, Tomas, 1974, et al.
(författare)
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A broadband heterostructure barrier varactor tripler source
- 2010
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Ingår i: 2010 IEEE MTT-S International Microwave Symposium (MTT). - 0149-645X. - 9781424460571 ; , s. 344-347
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Konferensbidrag (refereegranskat)abstract
- We present the first demonstration of a broadband Heterostructure Barrier Varactor tripler, designed to cover a major part of the WR-8 waveguide band. The source comprises a waveguide housing, a six-barrier InP-HBV diode flip-chip mounted on an AlN microstrip filter circuit. The conversion loss 3-dB bandwidth was measured to 17 % at a center frequency of 112 GHz. The maximum output power was more than 15 mW for an input power of 300 mW. There are no mechanical tuners or DC-bias, which simplifies assembly and allows for ultra-compact design.
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| 2. |
- Bryllert, Tomas, 1974, et al.
(författare)
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A monolithic 280 GHz HBV frequency tripler
- 2010
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Ingår i: IRMMW-THz 2010 - 35th International Conference on Infrared, Millimeter, and Terahertz Waves, Conference Guide. - 9781424466573
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Konferensbidrag (refereegranskat)abstract
- We present the design and measurements of a Heterostructure Barrier Varactor based frequency tripler for 280 GHz. The tripler is fabricated as a monolithic circuit on an InP substrate, including the input and output waveguide probes. Several circuit versions for input power levels between 100 mW and 1W have been designed. © 2010 IEEE.
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| 3. |
- Hanning, Johanna, 1981, et al.
(författare)
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HBV MMIC frequency tripler and quintupler for high power THz applications
- 2011
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Ingår i: Millimetre Wave Days Proceedings,The 6th ESA Workshop on Millimetre-Wave Technology and Applications AND The 4th Global Symposium on Millimeter Waves GSMM2011, May 23rd – May 25th, 2011, MilliLab, Espoo, Finland.
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Konferensbidrag (refereegranskat)abstract
- We present the development status of two different HBV frequency multipliers, with x3 and x5 multiplication for a 282 GHz and 470 GHz output respectively. The multipliers are designed for high power operation and fabricated in an InP monolithic process. Preliminary measurements of the x3 multiplier demonstrate 10 % conversion efficiency at 296 GHz.
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| 4. |
- Kirkhus, Bente, et al.
(författare)
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Effects of similar intakes of marine n-3 fatty acids from enriched food products and fish oil on cardiovascular risk markers in healthy human subjects
- 2012
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Ingår i: British Journal of Nutrition. - 0007-1145 .- 1475-2662. ; 107:9, s. 1339-1349
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Tidskriftsartikel (refereegranskat)abstract
- There is convincing evidence that consumption of fish and fish oil rich in long-chain (LC) n-3 PUFA (n-3 LCPUFA), EPA (20 : 5n-3) and DHA (22 : 6n-3) reduce the risk of CHD. The aim of the present study was to investigate whether n-3 LCPUFA-enriched food products provide similar beneficial effects as fish oil with regard to incorporation into plasma lipids and effects on cardiovascular risk markers. A parallel 7-week intervention trial was performed where 159 healthy men and women were randomised to consume either 34 g fish pate (n 44), 500 ml fruit juice (n 38) or three capsules of concentrated fish oil (n 40), all contributing to a daily intake of approximately 1 g EPA and DHA. A fourth group did not receive any supplementation or food product and served as controls (n 37). Plasma fatty acid composition, serum lipids, and markers of inflammation and oxidative stress were measured. Compared with the control group, plasma n-3 LCPUFA and EPA: arachidonic acid ratio increased equally in all intervention groups. However, no significant changes in blood lipids and markers of inflammation and oxidative stress were observed. In conclusion, enriched fish pate and fruit juice represent suitable delivery systems for n-3 LCPUFA. However, although the dose given is known to reduce the risk of CVD, no significant changes were observed on cardiovascular risk markers in this healthy population.
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| 5. |
- Matzka, Jürgen, et al.
(författare)
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A new aeromagnetic survey of the North Pole and the Arctic Ocean north of Greenland and Ellesmere Island
- 2010
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Ingår i: Earth Planets and Space. - : Society of Geomagnetism and Earth, Planetary and Space Sciences. - 1343-8832 .- 1880-5981. ; 62:10, s. 829-832
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Tidskriftsartikel (refereegranskat)abstract
- We present a preliminary analysis of more than 50,000 km of aeromagnetic survey lines flown in the Arctic Ocean, acquired in 2009 with an optically pumped scalar magnetometer as part of the airborne geophysical survey 'LOMGRAV'. From the observations we removed main and magnetospheric fields as given by the CHAOS-3 field model (Olsen et al., 2010) and remaining external fields as monitored by the Canadian magnetic observatory Alert. The reduced data were levelled based on cross-over differences at line intersections. Finally, a grid was computed, upward continued by 3500 m and compared with the EMAG2 grid (Maus et al., 2009), showing a good general agreement but also areas with systematic differences. The obtained data are expected to be part of the next version of the World Digital Magnetic Anomaly Map (WDMAM).
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| 6. |
- Stake, Jan, 1971, et al.
(författare)
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Development of integrated submillimeter wave diodes for sources and detectors
- 2010
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Ingår i: 13th European Microwave Week 2010: Connecting the World, EuMIC 2010; Paris; France; 26 September 2010 through 1 October 2010. - 9782874870156 ; , s. 226-229
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Konferensbidrag (refereegranskat)abstract
- We present progress and status of Heterostructure Barrier Varactor multiplier sources and development of integrated Schottky diode mixers for submillimeter wave applications.
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| 7. |
- Vukusic, Josip, 1972, et al.
(författare)
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Monolithic HBV-Based 282-GHz Tripler With 31-mW Output Power
- 2012
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Ingår i: IEEE Electron Device Letters. - 0741-3106 .- 1558-0563. ; 33:6, s. 800-802
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Tidskriftsartikel (refereegranskat)abstract
- We present a heterostructure barrier varactor multiplier at 282 GHz. The tripler chip was monolithically fabricated in the InGaAs/InAlAs material system on InP as carrier substrate and mounted in a fix-tuned, waveguide block. Standard rectangular waveguides WR-10/WR-3 connect the multiplier chip to the respective input/output of the waveguide block. Measurements produced 31 mW of output power and a minimum conversion loss of 11.6 dB (7 % efficiency). The device dimensions and their electrical and thermal influence are also presented.
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