Spatial Filters for Linearly Polarized Antennas Using Free Standing Frequency Selective Surface

Farahat, Asmaa E.; Hussein, Khalid F. A.; El-Minyawi, N.M.

doi:10.2528/pierm08041606

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…FSS is a two-dimensional periodic structure composed of periodically arranged metallic patches or aperture elements which are etched on the surface of the dielectric substrate. It can act as a spatial filter which has a selective effect on the incident angle, polarization and frequency of electromagnetic wave [1,2]. Frequency selective surface has been widely used as radar radome [3], antenna reflector [4,5], polarization converter [6], microwave absorber [7], etc.…”

Section: Introductionmentioning

confidence: 99%

Angular-Stability Low-Profile Miniaturized Frequency Selective Surface Based on Complementary Structure

Li¹

2017

PIER M

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A new architecture for a low-profile miniaturized-element frequency selective surface based on complementary structure capable of providing a high angular stable performance is proposed. The proposed FSS is composed of an array of convoluted cross dipoles and its complementary slots pattern that is separated by a thin dielectric substrate. An equivalent circuit model for this FSS is presented to provide a deep insight into the mechanism of reducing the unit size by shifting and lengthening the dipoles. With the use of this method, the FSS unit cell size has been significantly reduced to only 0.0085λ × 0.0085λ, and the thickness is 0.000093λ, where λ represents the resonant wavelength in free space. Moreover, the proposed FSS achieves good stability in the scope of incidence angles of 86 degrees for both TE and TM polarizations. Besides, the length of the dipoles can tune the resonant frequency.

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Section: Introductionmentioning

confidence: 99%

Angular-Stability Low-Profile Miniaturized Frequency Selective Surface Based on Complementary Structure

Li¹

2017

PIER M

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“…The EFIE technique has previously been applied for the analysis of the scattering from free standing finite planar structures [18]. Compared with other simulation approaches, the EFIE approach presents a number of advantages.…”

Section: Evaluation Of the Spatial Filter Responsementioning

confidence: 99%

Finite Length Omni-Directional Cylindrical Spatial Filters

Farahat¹,

Hussein²,

El-Minyawi³

2010

PIER B

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Abstract-A finite length cylindrical FSS is proposed as a spatial filter for both transmitting and receiving antennas. This filter has the advantage of not perturbing the omnidirectional property of the enclosed antenna. The proposed surface is constructed up as cylindrical array of rectangular conducting patches. The strips are arranged periodically in the φ-and z-directions. The electric field integral equation (EFIE) approach is used for analyzing the characteristics of the proposed spatial filter. The Rao-Wilton-Glisson (RWG) basis functions are used for current expansion on the conducting strips. The mutual effects between the filter and the antenna can be accurately investigated. The effects of some dimensional parameters on the filter characteristics, such as, the axial and angular spacing between the array elements, the length and the radius of the cylindrical surface are studied over a wide frequency range. The oblique incidence of plane waves on such a cylindrical filter is studied with varying the direction of incidence. The performance of the proposed spatial filter is examined when operating with nearby antennas. The effects of such a filter on the input impedance, VSWR, and radiation pattern of an enclosed bowtie antenna are investigated over a wide frequency range.

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“…Frequency selective surfaces are widely used as filters and absorbers in microwave, millimeter wave and far infrared community [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. They basically consist of periodic arrays of conducting patches or apertures on a conducting sheet.…”

Section: Introductionmentioning

confidence: 99%

Resonant Characteristics of Frequency Selective Surfaces on Ferrite Substrates

Zhang¹,

Yin²,

Yi³

2009

PIER

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Abstract-The resonant characteristics of frequency selective surfaces (FSSs) on in-plane biased ferrite substrates for the TE polarization are described. An approximate formula for evaluating the resonant frequency is presented. The tunable property of the resonant frequency of a dipole FSS is firstly demonstrated by the results obtained from the moment method (MM) and the waveguide simulator measurement. Then the approximate formula is validated by the MM as well as measured results already published in a previous paper. It is interesting to note that two separate resonances occur at any magnetic bias field, and both increase as the magnetic bias field increases. The fractional tuning range is investigated based on the approximate formula. The results show that it increases as the saturation magnetization increases and decreases as the center frequency increases.

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Spatial Filters for Linearly Polarized Antennas Using Free Standing Frequency Selective Surface

Cited by 9 publications

References 18 publications

Angular-Stability Low-Profile Miniaturized Frequency Selective Surface Based on Complementary Structure

Angular-Stability Low-Profile Miniaturized Frequency Selective Surface Based on Complementary Structure

Finite Length Omni-Directional Cylindrical Spatial Filters

Resonant Characteristics of Frequency Selective Surfaces on Ferrite Substrates

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