Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Majid Ostadrahimi"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 62:1790-1797
A novel 3-D dual-polarized microwave imaging system based on the modulated scattering technique (MST) is presented. The system collects the magnitude and phase of the scattered field using 120 MST probes and 12 transmitter/collector antennas distribu
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 61:3424-3434
The multiplicatively regularized Gauss-Newton inversion (GNI) algorithm is enhanced and utilized to obtain complex permittivity profiles of biological objects-of-interest. The microwave scattering data is acquired using a microwave tomography system
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 61:1376-1384
In this paper, we introduce a novel dual polarized microwave imaging system. The system is comprised of a circular array of multiplexed antennas, distributed evenly around an object-of-interest (OI), along with a novel plurality of probes located at
Publikováno v:
Progress In Electromagnetics Research. 143:503-518
A double-layered Vivaldi antenna enclosed by a metallic cylindrical cavity is investigated. The antenna is correlated to the same-size circular horn antenna to exploit the equivalent modal distribution of the Vivaldi-cavity antenna. It is shown that
Autor:
Lotfollah Shafai, Puyan Mojabi, Stephen Pistorius, Majid Ostadrahimi, Joe LoVetri, Sima Noghanian
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 61:379-390
In this paper, we introduce a novel microwave tomography system, which utilizes 24 double-layered Vivaldi antennas, each of which is equipped with a diode-loaded printed-wire probe. By biasing the probe's diodes, the impedance of the probe is modifie
Publikováno v:
Microwave and Optical Technology Letters. 54:126-133
A combination method is utilized to design eagle feed Vivaldi antenna.The antenna structure is discretized into arbitrary number of sections whose characteristic impedances and their corresponding dimensions are evaluated using transmission line theo
Autor:
Stephen Pistorius, Puyan Mojabi, Joe Lo Vetri, Majid Ostadrahimi, Colin Gilmore, Amer Zakaria
Publikováno v:
IEEE Antennas and Propagation Magazine. 53:126-133
We present a repository of multi-static, near-field microwave scattering measurements. The data are presented both raw (uncalibrated), and calibrated with a scattered-field calibration. Measurements were taken with 24 co-resident Vivaldi antennas in
Autor:
Stephen Pistorius, Amer Zakaria, Majid Ostadrahimi, Colin Gilmore, Sima Noghanian, Joe LoVetri, Puyan Mojabi
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 10:900-903
Imaging with microwave tomography systems requires both the incident field within the imaging domain as well as calibration factors that convert the collected data to corresponding data in the numerical model used for inversion. The numerical model m
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 10:1445-1448
Scattering probes with collector antennas can be utilized for microwave tomography (MWT) applications based on the modulated scatterer technique. Using this technique, we previously demonstrated a novel tomography system that utilizes a single printe
Publikováno v:
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS).
The various options in the design of microwave imaging systems for biomedical applications, as well as the associated options in the mathematical formulation of the corresponding inverse scattering problem, are delineated and discussed. These options