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Lindberg, Peter
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Publications (10 of 17) Show all publications
Lindberg, P. & Öjefors, E. (2006). A Bandwidth Enhancement Technique for Mobile Handset Antennas using Wavetraps. IEEE Transactions on Antennas and Propagation, 54(8), 2226-2233
Open this publication in new window or tab >>A Bandwidth Enhancement Technique for Mobile Handset Antennas using Wavetraps
2006 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 54, no 8, p. 2226-2233Article in journal (Refereed) Published
Abstract [en]

A novel technique for enhancing the impedance bandwidth of wireless terminal antennas is presented. By introducing resonant short circuit transmission lines to the long sides of the chassis edges, an effective electrical shortening of the terminal ground plane is achieved. This effect has been used to realize terminal ground planes with resonant lengths at high frequencies, such as GSM 1800/1900.MHz or UNITS 2 GHz, thereby extending the impedance bandwidth. The proposed technique has been validated by simulations and measurements. Three typical applications are presented where the introduction of wavetraps improves the bandwidth and/or in-band performance.

Keywords
bandwidth, broadband communication, microstrip antennas, mobile antennas
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-95373 (URN)10.1109/TAP.2006.879211 (DOI)000240116800006 ()
Available from: 2007-01-12 Created: 2007-01-12 Last updated: 2017-12-14Bibliographically approved
Lindberg, P., Sengul, M., Cimen, E. G., Yarman, B. S., Rydberg, A. & Aksen, A. (2006). A single matching network design for a dual band PIFA antenna via simplified real frequency technique. In: : . Paper presented at Proceedings EuCAP2006, Nice, France.
Open this publication in new window or tab >>A single matching network design for a dual band PIFA antenna via simplified real frequency technique
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2006 (English)Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-23542 (URN)
Conference
Proceedings EuCAP2006, Nice, France
Available from: 2007-01-30 Created: 2007-01-30 Last updated: 2016-06-22
Lindberg, P. & Kaikkonen, A. (2006). Earpiece cord antenna for DVB-H reception in wireless terminals. IEE Electronic Letters, 43(11)
Open this publication in new window or tab >>Earpiece cord antenna for DVB-H reception in wireless terminals
2006 (English)In: IEE Electronic Letters, Vol. 43, no 11Article in journal (Refereed) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-18032 (URN)
Available from: 2006-11-20 Created: 2006-11-20 Last updated: 2016-07-12
Lindberg, P., Dahlin, A., Bergström, S., Thorslund, S., Andrén, P., Nikolajeff, F. & Bergquist, J. (2006). Sample pretreatment on a microchip with an integrated electrospray emitter. Electrophoresis, 27(11), 2075-2082
Open this publication in new window or tab >>Sample pretreatment on a microchip with an integrated electrospray emitter
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2006 (English)In: Electrophoresis, ISSN 0173-0835, E-ISSN 1522-2683, Vol. 27, no 11, p. 2075-2082Article in journal (Refereed) Published
Keywords
Electrospray emitter, Microchip, PDMS, Sample pretreatment
National Category
Chemical Sciences Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-95129 (URN)10.1002/elps.200500763 (DOI)
Available from: 2006-11-17 Created: 2006-11-17 Last updated: 2017-12-14Bibliographically approved
Lindberg, P. & Öjefors, E. (2006). Wideband slot antenna for low-profile hand-held terminal applications. In: : . Paper presented at Proceedings of the 36th European Microwave Conference, Manchester, UK.
Open this publication in new window or tab >>Wideband slot antenna for low-profile hand-held terminal applications
2006 (English)Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-23541 (URN)
Conference
Proceedings of the 36th European Microwave Conference, Manchester, UK
Available from: 2007-01-30 Created: 2007-01-30 Last updated: 2016-06-22
Lindberg, P., Öjefors, E. & Rydberg, A. (2005). A 24 GHz on-chip differential Wilkinson coupler using lumped components. In: GigaHertz 2005 Conference Proceedings.
Open this publication in new window or tab >>A 24 GHz on-chip differential Wilkinson coupler using lumped components
2005 (English)In: GigaHertz 2005 Conference Proceedings, 2005Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-75978 (URN)
Available from: 2006-03-10 Created: 2006-03-10
Lindberg, P., Öjefors, E. & Rydberg, A. (2005). A SiGe 24 GHz monolithically integrated direct conversion receiver. In: GigaHertz 2005 Conference Proceedings.
Open this publication in new window or tab >>A SiGe 24 GHz monolithically integrated direct conversion receiver
2005 (English)In: GigaHertz 2005 Conference Proceedings, 2005Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-75979 (URN)
Available from: 2007-02-08 Created: 2007-02-08
Thorslund, S., Lindberg, P., Andrén, P. E., Nikolajeff, F. & Bergquist, J. (2005). Electrokinetic-driven microfluidic system in poly(dimethylsiloxane) for mass spectrometry detection integrating sample injection, capillary electrophoresis, and electrospray emitter on-chip. Electrophoresis, 26(24), 4674-4683
Open this publication in new window or tab >>Electrokinetic-driven microfluidic system in poly(dimethylsiloxane) for mass spectrometry detection integrating sample injection, capillary electrophoresis, and electrospray emitter on-chip
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2005 (English)In: Electrophoresis, ISSN 0173-0835, Vol. 26, no 24, p. 4674-4683Article in journal (Refereed) Published
Abstract [en]

A novel microsystem device in poly(dimethylsiloxane) (PDMS) for MS detection is presented. The microchip integrates sample injection, capillary electrophoretic separation, and electrospray emitter in a single substrate, and all modules are fabricated in the PDMS bulk material. The injection and separation flow is driven electrokinetically and the total amount of external equipment needed consists of a three-channel high-voltage power supply. The instant switching between sample injection and separation is performed through a series of low-cost relays, limiting the separation field strength to a maximum of 270 V/cm. We show that this set-up is sufficient to accomplish electrospray MS analysis and, to a moderate extent, microchip separation of standard peptides. A new method of instant in-channel oxidation makes it possible to overcome the problem of irreversibly bonded PDMS channels that have recovered their hydrophobic properties over time. The fast method turns the channel surfaces hydrophilic and less prone to nonspecific analyte adsorption, yielding better separation efficiencies and higher apparent peptide mobilities.

Keywords
PDMS, Microfluidics, ESI-MS, CE, Microchip
National Category
Natural Sciences Pharmaceutical Sciences Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-77269 (URN)10.1002/elps.200500338 (DOI)16273585 (PubMedID)
Available from: 2007-01-23 Created: 2007-01-23 Last updated: 2018-01-13Bibliographically approved
Grenier, K., Mazenq, L., Duboc, D., Bouchriha, F., Cocetti, F., Öjefors, E., . . . Plana, R. (2005). IC compatible MEMS technologies. In: 35th European Microwave Conference (EuMC).
Open this publication in new window or tab >>IC compatible MEMS technologies
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2005 (English)In: 35th European Microwave Conference (EuMC), 2005Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-10713 (URN)
Available from: 2007-04-20 Created: 2007-04-20
Lindberg, P., Öjefors, E. & Rydberg, A. (2005). LTCC packaging for a 26 GHz SiGe receiver. In: GigaHertz 2005 Conference Proceedings.
Open this publication in new window or tab >>LTCC packaging for a 26 GHz SiGe receiver
2005 (English)In: GigaHertz 2005 Conference Proceedings, 2005Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-75984 (URN)
Available from: 2006-03-10 Created: 2006-03-10
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