ICARA: induced-current analysis of reflector antennas

Lorenzo, José Á. Martínez; Pino, A.G.; Vega, Ingrid Vanessa Vásquez; Arias, Marcos; Rubiños, Óscar

doi:10.1109/map.2005.1487792

Cited by 43 publications

(18 citation statements)

References 8 publications

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“…The unknown vector r contains in its n − th row the quatity c n · T nwhere T n is the physical temperature at n − th pixel; and c n is a constant depending on the wavelength, Boltzmann constant, area of the pixel in the imaging domain, wave impedance in free space, and distance between the CRA and the Earth. The sensing matrix and the measured data is performed using [8]. …”

Section: Sensing Matrix For Cross-correlation Interferometry Imamentioning

confidence: 99%

Interferometric sounding using a Compressive Reflector Antenna

Molaei

Allan

Heredia

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This paper presents a novel interferometric system for sensing the physical temperature radiated from the Earth. The proposed system consists of a Compressive Reflector Antenna (CRA) using a Y-shaped receiving array. The Compressive Reflector Antenna creates a spatial codification in the far-field of the antenna; or, by using the reciprocity theorem, it creates spatial codes in the focal plane array region when it is operating in reception mode. The sensing matrix of the system is generated by using a high frequency method based on Physical Optics, and its inversion is performed using Compressive Sensing techniques. Numerical results demonstrate the effectiveness of the proposed system for reconstructing a typical map of the physical temperature of the Earth. The proposed CRA provides similar imaging performance as that of a current state of the art system GeoSTAR; however, the former only needs one half of the horns used by the latter.

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Section: Sensing Matrix For Cross-correlation Interferometry Imamentioning

confidence: 99%

Interferometric sounding using a Compressive Reflector Antenna

Molaei

Allan

Heredia

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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“…For arbitrary distributions and geometries, an analytical solution can not be reached. As a consequence, two assumptions are imposed (Arias et al 2000;Lorenzo et al, 2005):  The incident wave is a plane wave. …”

Section: Te and Tm Reflection Coefficientsmentioning

confidence: 99%

“…Therefore, the evaluation of the electromagnetic levels for RCS or other applications can consider not only the target itself but also its surroundings. Another field of application is the design of reflector antennas (Boag & Letrou, 2003;Lorenzo et al, 2005) with or without dielectric radomes because of their electric size. They are usually fed by an array of antennas whose radiation pattern is determined to compute the equivalent current densities and to calculate the fields at distances much larger than the wavelength afterwards.…”

Section: Application Examplesmentioning

confidence: 99%

High Frequency Techniques: the Physical Optics Approximation and the Modified Equivalent Current Approximation (MECA)

Gutierrez-Meana¹,

Martínez-Lorenzo²,

Las-Heras³

2011

Electromagnetic Waves Propagation in Complex Matter

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“…In order to achieve this analytical solution, the surfaces are discretized into flat triangular facets. Besides, a constant amplitude and linear phase distribution depending on the direction of propagation is assumed on each triangle [6]. This current distribution allows bigger facets when tessellating the scenario than the classical constant phase model.…”

Section: Modified Equivalent Current Approximationmentioning

confidence: 99%

GaAs power limiters MMIC

Lee

Tolstolutsky

Kazatchkov

et al. 2010

2010 20th International Crimean Conference "Microwave &Amp; Telecommunication Technology"

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This paper presents the application of the deterministic Modified Equivalent Current Approximation (MECA) method to the evaluation of radioelectric coverage in rural scenarios. MECA is an extension of the high frequency technique Physical Optics (PO) for non-PEC materials based on the determination of induced equivalent currents on the interface between two media. The electric field at different observation points due to a dipole located above a plane with PEC, dielectric and lossy characterizations is calculated with MECA and this is contrasted with the results obtained with the Image Theory and Method of Moments (MoM). Finally, the power density in an electrically large rural enviroment is shown and compared with the empirical COST 231 method.

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ICARA: induced-current analysis of reflector antennas

Cited by 43 publications

References 8 publications

Interferometric sounding using a Compressive Reflector Antenna

Interferometric sounding using a Compressive Reflector Antenna

High Frequency Techniques: the Physical Optics Approximation and the Modified Equivalent Current Approximation (MECA)

GaAs power limiters MMIC

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