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Implanted Antennas in Medical Wireless Communications

Yahya Rahmat-Samii, Jaehoon Kim
2006 Synthesis Lectures on Antennas  
Author Biographies Yahya Rahmat-Samii received the M.S. and Ph.D. degrees in electrical engineering from the University of Illinois, Urbana-Champaign.  ...  Professor Rahmat-Samii is the designer of the IEEE Antennas and Propagation Society (IEEE AP-S) logo, which is displayed on all IEEE-AP-S publications. Dr.  ... 
doi:10.2200/s00024ed1v01y200605ant001 fatcat:xj7h2izjdnfvtnugndjacwentq

Advanced Antennas for Small Satellites

Steven Gao, Yahya Rahmat-Samii, Richard E. Hodges, Xue-Xia Yang
2018 Proceedings of the IEEE  
Rahmat-Samii would like to thank the JPL CubeSat team, Tendeg, LLC, and his students V. Manohar and J. Kovitz for fruitful collaboration.  ... 
doi:10.1109/jproc.2018.2804664 fatcat:pjsbgm6tbbh6jgjdalbnyiqwxu

Fractal Yagi antennas: Design, simulation, and fabrication

John P. Gianvittorio, Yahya Rahmat-Samii
2004 Microwave and optical technology letters (Print)  
doi:10.1002/mop.20145 fatcat:k2ihekhbt5ggdlz6sicopfk5xi

A novel miniaturized triband PIFA for MIMO applications

Majid Manteghi, Yahya Rahmat-Samii
2007 Microwave and optical technology letters (Print)  
doi:10.1002/mop.22239 fatcat:h2lbnrkv6jembjwgejikdc6aau

Particle swarm optimization for reconfigurable phase-differentiated array design

Dennis Gies, Yahya Rahmat-Samii
2003 Microwave and optical technology letters (Print)  
between electric and magnetic field is easily obtained from the simulation, and compared with the theoretical one (180°Ϫ arctg[ ͌ 1 Ϫ 2 /] ϭ 107.5°) [8], the error being less than 0.1%. The wave impedance (defined in this case as the relation between the amplitudes of E and H) is easily obtained, too, and compared with the theoretical value (1, if we use normalized units), being also coincident, with a relative error of less than 0.5%. Finally, the phase speed of the wave is computed observing
more » ... he fields in different positions (5010, 5110, and 5210), and the time shift between them (Fig. 3) . It agrees well with the normalized theoretical value v theor ϭ 1/ ͱ1 Ϫ 2 ϭ 1.05 c, (c being the phase velocity in vacuum). The velocity obtained in our simulation is v Tellegen ϭ 1.07 c. The relative error is, then, less than 2%.
doi:10.1002/mop.11005 fatcat:5bkmisrqtzeotd3l6cf4jgblim

Reflectarray antennas: An intuitive explanation of reflection phase behavior

Harish Rajagopalan, Yahya Rahmat-Samii
2011 2011 XXXth URSI General Assembly and Scientific Symposium  
This paper presents the concept of reflectarray in a novel way, utilizing a graphical visualization tool. This approach greatly facilitates understanding of the working of the reflectarray antenna, and provides an intuitive explanation for the reflectarray behavior. The reflectarray element is characterized in a unit cell environment (periodic) and true reflectarray environment for its reflection phase performance. By understanding the reflection phase response of the element itself in these
more » ... environments, one can gain great insight into the reflectarray reflection phase phenomenon. By analyzing and evaluating the incident, scattered, and total fields, the element behavior can be studied in detail and the overall reflectarray performance can be validated. This reflection phase approach can also be potentially used to perform diagnostic tests on reflectarrays and identify existing flaws in the design and thus help in enhancing the design of reflectarray antenna.
doi:10.1109/ursigass.2011.6050485 fatcat:qtocrpvq2jemhdnfebzkisww64

Antenna and Sensor Technologies in Modern Medical Applications [Book Review]

Yahya Rahmat-Samii, Erdem Topsakal, Mahta Moghaddam
2021 IEEE Antennas & Propagation Magazine  
Yahya Rahmat-Samii and Prof. Erdem Topsakal, addresses these two challenges, especially as regards antennas and sensors, and achieves an exceptionally successful result.  ...  in Modern Medical Applications Edited by Yahya Rahmat-Samii and Erdem Topsakal Reviewed by Mahta Moghaddam (continued on page 156) IEEE ANTENNAS & PROPAGATION MAGAZINE O C T O B E R 2 0 2 1  ... 
doi:10.1109/map.2021.3102720 fatcat:stcqodjpwreopn7ebnhsjtsedm

Polarization-dependent electromagnetic band gap (PDEBG) structures: Designs and applications

Fan Yang, Yahya Rahmat-Samii
2004 Microwave and optical technology letters (Print)  
doi:10.1002/mop.20164 fatcat:erwlxcbu7nemxkm2nj255jstiu

Aperture efficiency analysis of reflectarray antennas

Ang Yu, Fan Yang, Atef Z. Elsherbeni, John Huang, Yahya Rahmat-Samii
2010 Microwave and optical technology letters (Print)  
doi:10.1002/mop.24949 fatcat:smrf22wsgjdctjns5dlwpkawd4

Performance of integrated antenna arrays for MIMO enabled laptops

David W. Browne, Jerzy Guterman, Yahya Rahmat-Samii, Michael P. Fitz
2007 2007 IEEE Antennas and Propagation International Symposium  
doi:10.1109/aps.2007.4396022 fatcat:wlwg3rib6fezjpcbme6h7bthfi


Arthur Densmore, Yahya Rahmat-Samii
2013 Electromagnetic Waves  
Rahmat-Samii, K. Warble, R. C. Hansen, J. Huang, T. Sarkar, L. Katehi and the contributors for session II were, S. Gillespie, G. Hindman, R. Collin, A. Ishimaru, H. Bertoni, T. Senior, P. Pathak, R.  ... 
doi:10.2528/pier13103105 fatcat:qy67tlt3njegvbeuw6bb56pzam

Characterization of embroidered dipole-type RFID tag antennas

Elham Moradi, Toni Bjorninen, Leena Ukkonen, Yahya Rahmat-Samii
2012 2012 IEEE International Conference on RFID-Technologies and Applications (RFID-TA)  
Wearable RFID tags and wireless sensors can be used for on-body and human monitoring applications. Embroidery with conductive thread provides compelling means for the fabrication of seamlessly garment-integrable antennas for wearable tags and wireless sensors. In this paper, we present the fabrication of fully assembled tags based on embroidered dipoletype antennas. The prototype tags achieve 5.5-to-7 meters read range. Moreover, we present a method for estimating the effective conductivity of
more » ... he embroidery pattern, which depends on the sewing pattern and the stitch density. This will enable the judicious optimization of embroidered tag antennas using electromagnetic simulation tools.
doi:10.1109/rfid-ta.2012.6404522 dblp:conf/rfidta/MoradiBUR12 fatcat:7ny3n47zwfgljdumn2utxtqis4

Letter to the editor: Comment on special sections on diffraction: Guest editors' reply

Charles M. Knop, Giuseppe Pelosi, Yahya Rahmat-Samii, John L. Volakis
2013 IEEE Antennas & Propagation Magazine  
I n two recent issues of the Antennas and Propagation Magazine (specifi cally, Volume 55, No. 3, June 2013, and Volume 55, No. 4, August 2013), the history of diffraction and the associated chief contributors/scholars to same were impecca bly presented. However, the interesting original work on APO (Asymptotic Physical Optics) by W. V. T. Rusch [1] and its extension by C. M. Knop [2], and on CAPO (Corrected Asymptotic Physical Optics) by C. M. Knop and E. L. Ostertag [3, 4], as applied to a
more » ... boloid antenna, was overlooked. This work was later independently examined and thoroughly summarized by P. J. I. de Maaagt, J. Chen, and M. H. A. J. Herben [5], and shown to agree with Kouyoumjian and Pathak's modifi ed UTD. Basically, the APO work [1] employed a "second kind" asymptotic integration of the PO fi elds on the refl ector as produced by the incident horn/subrefl ector fi elds. This solution had (like J. B. Keller's original GTD work [6]) a singularity at the shadow boundary. A more accurate asymptotic integration [2] removed this singularity. However, comparison with measurements showed that this solution disagreed with measurements in the back region (e.g., for the paraboloid studied in [3, 4] , by up to 6 dB for 130 175 θ°≤ ≤°). This error was removed by the expedient of multiplying the APO diffraction coeffi cients of [2] by the ratio of the exact Sommerfeld solu tion to the APO solution of a half-plane giving the CAPO coeffi cients [3, 4] . This CAPO procedure gives numerical results for this paraboloid case identical to those of the modifi ed UTD [5] . However, it does not give a physical picture of the diffraction phenomenon as does modifi ed UTD.
doi:10.1109/map.2013.6781732 fatcat:iwdglsro3ngllk27tag3goee5y


Junbo Wang, Yahya Rahmat-Samii
2019 Progress in Electromagnetics Research B  
Step-like perfect electric conductor (PEC) structures are studied in both electrostatic and electrodynamic cases implementing Method of Moments. The canonical geometries included in these step-like structures such as edges, wedges and corners as well as the unique charge and current behaviors are characterized and discussed. Both 2D and 3D electrostatic problems are studied. In 2D electrostatic problem, a constant is introduced to the traditional 2D Green's function which effectively adjusts
more » ... zero potential reference embedded in the Green's function. This modification alleviates the contradiction between 2D and 3D definitions of electrostatic quantities and avoids unrealistic charge solutions obtained by Method of Moments. In 2D electrodynamic problem, the occasional appearance of singular surface current near the step's right angle bends is observed, discussed and then linked with the analytical solution of a canonical wedge scattering problem. Physical Optics approximation is also utilized as a comparison to Method of Moments in solving the 2D scattering problems.
doi:10.2528/pierb19050409 fatcat:7lvjq3nhhvbzxenodrs3gym7i4

Spatial Diversity Performance of Multiport Antennas in the Presence of a Butler Network

Nima Jamaly, Anders Derneryd, Yahya Rahmat-Samii
2013 IEEE Transactions on Antennas and Propagation  
Yahya Rahmat-Samii Dr. Rahmat-Samii is a Fellow of the Institute of Advances in Engineering (IAE), a Fellow of AMTA and a Fellow ACES.  ...  Rahmat-Samii has received numerous NASA and JPL Certificates of Recognition.  ... 
doi:10.1109/tap.2013.2278200 fatcat:aurjwfqssjcnvbx4iu6hh2xlga
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