Diffraction analysis of frequency selective reflector antennas

Rahmat‐Samii, Y.; Tulintseff, A.

doi:10.1109/8.220980

Cited by 54 publications

(28 citation statements)

References 9 publications

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“…He uses the same approach as Cwik [14], but on a much more complicated problem [4]. At various points around the curved surface, he first finds the local tangent plane and then calculates the reflection and transmission coefficients of an infinite periodic FSS coincident with that plane.…”

Section: Work Pertaining To Seamsmentioning

confidence: 99%

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Analysis of electromagnetic scattering by nearly periodic structures: an LDRD report.

Johnson¹,

Warne²,

Jorgenson³

et al. 2006

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In this LDRD we examine techniques to analyze the electromagnetic scattering from structures that are nearly periodic. Nearly periodic could mean that one of the structure's unit cells is different from all the others -a defect. It could also mean that the structure is truncated, or butted up against another periodic structure to form a seam. Straightforward electromagnetic analysis of these nearly periodic structures requires us to grid the entire structure, which would overwhelm today's computers and the computers in the foreseeable future. In this report we will examine various approximations that allow us to continue to exploit some aspects of the structure's periodicity and thereby reduce the number of unknowns required for analysis. We will use the Green's Function Interpolation with a Fast Fourier Transform (GIFFT) to examine isolated defects both in the form of a source dipole over a meta-material slab and as a rotated dipole in a finite array of dipoles. We will look at the numerically exact solution of a one-dimensional seam. In order to solve a two-dimensional seam, we formulate an efficient way to calculate the Green's function of a 1d array of point sources. We next formulate ways of calculating the far-field due to a seam and due to array truncation based on both array theory and high-frequency asymptotic methods. We compare the high-frequency and GIFFT results. Finally, we use GIFFT to solve a simple, two-dimensional seam problem.3

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Section: Work Pertaining To Seamsmentioning

confidence: 99%

“…One such structure is known as a frequency selective surface (FSS) [3]. FSS's are used as microwave filters, in radomes and as frequency dependent reflectors for space re-use in reflector antenna systems [4]. In the infrared, FSS's are used as polarizers, beam splitters and mirrors [5].…”

Section: Description Of a Pbg Structurementioning

confidence: 99%

Analysis of electromagnetic scattering by nearly periodic structures: an LDRD report.

Johnson¹,

Warne²,

Jorgenson³

et al. 2006

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“…FSS have found wide use in various applications, not only radar antennas; but also to absorb an incident radiation and hence reduce the radar cross section of a target [18,19]; to provide a reflective surface for beam focusing in reflector antenna system [20][21][22] or to enhance array antenna performances [23].…”

Section: Introductionmentioning

confidence: 99%

A Physical Optics Approach to the Analysis of Large Frequency Selective Radomes

D'Elia¹,

Pelosi²,

Pichot³

et al. 2013

PIER

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Abstract-State-of-the-art radomes exploit frequency selective media so as to be transparent for the frequencies of the antenna protected by them and opaque to other frequencies. This feature helps in reducing the radar cross section of the antenna and in protecting it from interference. The study of a frequency selective radome is a daunting task, since the radome is usually large in terms of wavelengths, hence full wave analyses are prohibitive. In this paper an approximate technique, based on the physical optics concept, is proposed to attain an estimation of the behavior of a radome shielded antenna in a short time with a commonly available computer. Results are validated against a full wave technique over a relatively small radome.

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“…They are typically used in dichroic reflectors [1] and radomes [2]. Ideally, at some frequencies an FSS completely reflects an incident plane wave, while at other frequencies the FSS is completely transparent to the incident plane wave.…”

Section: Introductionmentioning

confidence: 99%

“…For capacitive type FSS (surfaces composed of scattering elements as opposed to scattering apertures [3]), 100% reflection is possible only when the elements are resonating. One of the figures of merit of a resonance is the Quality factor, Q, which is defined as Q = f 0 ∆f (dimensionless) (1) where f 0 is the center frequency, and ∆f is the 3 dB bandwidth.…”

Section: Introductionmentioning

confidence: 99%