Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Paul Hallbjörner"'
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
Mode-stirred chambers provide an excellent tool for antenna characterization. Recent research has focused on making the mode-stirred chamber technique more versatile. One result of these efforts is the sample selection technique, by which a subset of
Externí odkaz:
https://doaj.org/article/ab337ea186a34c30a8f68d2b3bf53fee
Autor:
Juan D. Sánchez-Heredia, Paul Hallbjörner, Juan F. Valenzuela-Valdés, Thomas Bolin, Antonio M. Martínez-González
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
User influence on multiple-input multiple-output (MIMO) performance is studied for different dual antenna handsets specially designed to have good and bad MIMO performance. The study reveals that user influence can cause either improvement or degrada
Externí odkaz:
https://doaj.org/article/c8cd904614614463952800b652c42c7d
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 55:21-27
Reverberation chambers (RC) are widely used for measuring antenna performance and parameters for MIMO systems. RCs for mobile phone antenna tests are often specially designed for this purpose. The lowest frequency of operation of an RC is decided by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a54d078b9b284e16e8de90c66f89773
https://doi.org/10.1109/temc.2012.2204758
https://doi.org/10.1109/temc.2012.2204758
Autor:
Antonio Jose Lozano-Guerrero, Juan F. Valenzuela-Valdes, Paul Hallbjörner, A.M. Martinez-Gonzalez, Juan D. Sanchez-Heredia
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 12:1586-1589
Reverberation chambers have in recent years been validated as efficient tools for measuring multiple-input-multiple-output (MIMO) systems. Nowadays, cooperative systems are beginning to gain attention as the key to reach high speeds in the wireless e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7ce82ab1df68623c732003389fdd2ac
https://doi.org/10.1109/lawp.2013.2293514
https://doi.org/10.1109/lawp.2013.2293514
Autor:
Shi Cheng, Paul Hallbjörner
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 12:1085-1088
Many road vehicles are today equipped with 77-GHz radar systems for improved road safety. Some objects on the roads, e.g., pedestrians, give a poor reflection of the radar signal. Two applications are studied in this letter: jackets with the reflecto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::164b862cab8c74804d1e5ade2670a728
https://doi.org/10.1109/lawp.2013.2280461
https://doi.org/10.1109/lawp.2013.2280461
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 6:472-475
The planar inverted cone antenna (PICA) is an antenna type that shows remarkably wideband performance. In its basic configuration, it is mounted on an infinite ground plane, and protrudes lambda/4 above it. This letter presents a study of the possibi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5afcea13e0da0b537497f521e78a3ea5
https://doi.org/10.1109/lawp.2007.907051
https://doi.org/10.1109/lawp.2007.907051
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:2593-2603
A 60-GHz active microstrip antenna design comprising a three-stage pseudomorphic high electron mobility transistor amplifier integrated with a high gain antenna on an alumina substrate is presented. The amplifier has 18-dB gain and is ribbon bonded t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0d757036ffc0e8c531e8c411c08e0c8
https://doi.org/10.1109/tmtt.2006.872923
https://doi.org/10.1109/tmtt.2006.872923
Publikováno v:
IEEE Transactions on Electromagnetic Compatibility. 47:291-303
Reverberation chambers can be used to measure the absorption cross section of a dielectric object. The absorption cross section of a dielectric object depends on its size, shape, and electrical material parameters. By comparing with a theoretical mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::275e68e1e7f0e65ecc4dccde986cde54
https://doi.org/10.1109/temc.2005.847391
https://doi.org/10.1109/temc.2005.847391
Autor:
Paul Hallbjörner
Publikováno v:
IEEE Transactions on Antennas and Propagation. 52:1424-1428
An electrically small antenna element is presented. It is an unbalanced antenna, consisting of four wire arms arching over a groundplane. One of the wire ends is the feed, and the other three are connected to the groundplane, via a capacitance, short
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::235ed8c763a8d2e7c74145e2dfcaa50e
https://doi.org/10.1109/tap.2004.829851
https://doi.org/10.1109/tap.2004.829851
Autor:
Paul Hallbjörner
Publikováno v:
Microwave and Optical Technology Letters. 38:99-102
A general method for calculating the scattering matrix of an arbitrary microwave networks is presented. Compared to existing methods, it uses a simplified algorithm that makes no distinction between external and internal ports. It thereby achieves al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adddfa4e931da32d25425d82699158bf
https://doi.org/10.1002/mop.10983
https://doi.org/10.1002/mop.10983