Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Kasra Payandehjoo"'
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
International Journal of RF and Microwave Computer-Aided Engineering. 25:30-38
In this article, ultracompact unidirectional patch antennas are used in different two-antenna systems for biomedical applications at 5.2 GHz. Multilayer mushroom type electromagnetic bandgap (EBG) structures are designed as slow-wave medium to reduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eca0e403388ca40ed20f20c65b60ab98
https://doi.org/10.1002/mmce.20820
https://doi.org/10.1002/mmce.20820
Autor:
Kasra Payandehjoo, Shirook M. Ali
Publikováno v:
IET Microwaves, Antennas & Propagation. 8:401-408
Today's handset antenna needs to support many more bands complying with the standards specifications, yet still within the handset confined form factor. This study presents novel tunable antennas techniques. The antenna tuning here is achieved by loa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::887b8002b582c9968077cce91b2ee66e
https://doi.org/10.1049/iet-map.2013.0234
https://doi.org/10.1049/iet-map.2013.0234
Autor:
Ramesh Abhari, Kasra Payandehjoo
Publikováno v:
IEEE Transactions on Antennas and Propagation. 61:4814-4819
In this communication, miniaturized tunable two-antenna systems composed of printed inverted-F antennas (PIFAs) are developed for a semi-populated mobile phone handset. The PIFAs are loaded with a series combination of an inductor and a varactor to s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7302219c7e4d8c53f20e878390b1c038
https://doi.org/10.1109/tap.2013.2267718
https://doi.org/10.1109/tap.2013.2267718
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
International Journal of RF and Microwave Computer-Aided Engineering. 24:289-297
In this article, an improved approach is presented for designing Electromagnetic Bandgap EBG reflectors for slot antennas by using a waveguide aperture source in simulating reflection phase test. In this manner the nonplanar nature of the near field
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd1867020045b47304565f132378d0d1
https://doi.org/10.1002/mmce.20759
https://doi.org/10.1002/mmce.20759
Autor:
Ramesh Abhari, Kasra Payandehjoo
Publikováno v:
International Journal of RF and Microwave Computer-Aided Engineering. 24:1-10
This article investigates parasitic radiating structures for coupling reduction between two 900MHz planar inverted-F antennas (PIFAs) in a hand-held device. Measurement of the initial prototype shows that a maximum isolation enhancement of more than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f79fd017346a9b284a22412191ade181
https://doi.org/10.1002/mmce.20706
https://doi.org/10.1002/mmce.20706
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 8:1162-1165
This letter investigates the effect of mutual coupling on the operation of a multiantenna system. Radiation pattern, input impedance, gain, and efficiency of a slot antenna in proximity of another slot antenna are studied through simulations. A mushr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32d5e37a122372c9fe44c5b0402086c3
https://doi.org/10.1109/lawp.2009.2034877
https://doi.org/10.1109/lawp.2009.2034877
Autor:
Kasra Payandehjoo, Ruska Patton
Publikováno v:
2014 IEEE Conference on Antenna Measurements & Applications (CAMA).
This article presents the methodology for de-embedding the effect of a printed array of probes in a planar very-near-field measurement system. The effect of the individual probes and their feed lines is de-embedded using a proprietary calibration pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3197bb53f033efea1098787300281903
https://doi.org/10.1109/cama.2014.7003433
https://doi.org/10.1109/cama.2014.7003433
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation.
Two compact 60GHz on-chip multi-antenna systems, each composed of an inverted-L antenna pair and a PIFA pair in a 1mm × 1mm area, are implemented in CMOS 0.13 process. A novel coupling reduction technique is applied to the antennas of one of the chi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1826337baf75da24db277fdf6d4363b6
https://doi.org/10.1109/aps.2012.6348879
https://doi.org/10.1109/aps.2012.6348879
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation.
In this paper, multi-conductor transmission-line (MTL) theory is applied to modeling and analysis of shielded two-layer mushroom-type electromagnetic bandgap (EBG) structures. The slow-wave mode predicted by this method is used to design a compact pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33ad7a67b9d730ea0326077ac970246c
https://doi.org/10.1109/aps.2012.6348995
https://doi.org/10.1109/aps.2012.6348995
Autor:
Kasra Payandehjoo, Ramesh Abhari
Publikováno v:
2011 IEEE International Symposium on Antennas and Propagation (APSURSI).
In this paper, four compact electromagnetic bandgap (EBG) structures are designed specifically for on-chip implementation. Miniaturized mushroom-like EBG structures are developed only using SiO 2 metal layers while being shielded from the lossy silic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6684023c6e536bc7055906f6509ef94d
https://doi.org/10.1109/aps.2011.5996849
https://doi.org/10.1109/aps.2011.5996849