Design of X-band frequency selective surface (FSS) with band pass characteristics based on miniaturized unit cell

Rahim, Tariq; Khan, Fawad Azam; Jia-dong, XU

doi:10.1109/ibcast.2016.7429937

Cited by 15 publications

(9 citation statements)

References 17 publications

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“…Metal film filters can be fabricated by various fabrication methods: evaporation, sputtering, etching, or lifting-off. Advanced designs are multilayer structures, as in [21,22]. For frequencies below 1 THz, such filters can be made of free-standing thin metal foil instead of thin film on a dielectric substrate.…”

Section: Thin-film Filtersmentioning

confidence: 99%

“…Figure16. Results of modeling of the whole array of 25 annular antennas as in Figure2: (a) schematic image of modeled structure with description; and (b) optical image of fabricated array (left) and results of modeling for two polarization modes, along connection lines (mode 1) and across (mode 2), as in[22].…”

mentioning

confidence: 99%

“…Figure25. The calculated spectral response of matrices of electrically small antennas using two methods: (a) a single cell with Floquet ports; and (b) an entire matrix modeling[5,15,22].…”

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confidence: 99%

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Arrays of Sub-Terahertz Cryogenic Metamaterial

et al. 2021

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Integrated quasi-optical cryogenic terahertz receivers contain arrays of detectors, quasi-optical filters, interferometers, and other metamaterials. Matrices of quasi-optical band-pass, low-pass, and high-pass filters, Fabry–Perot grid interferometers, and arrays of half-wave and electrically small antennas with superconductor-insulator-normal metal-insulator-superconductor (SINIS) sub-terahertz wavelength range detectors were fabricated and experimentally studied on the same computational, technological, and experimental platform. For the design of the filters, we used the periodic frequency-selective surfaces (FSS) approach, contrary to detector arrays that can be presented in a model of distributed absorbers. The structures were fabricated using direct electron beam lithography, thermal shadow evaporation, lift-off, alternatively magnetron sputtering, and chemical and plasma etching. The numerical simulation methods of such structures are sufficiently different: for the reactive matrices with low losses, the approximation of an infinite structure with periodic boundary conditions is applicable, and for the arrays of detectors with dissipative elements of absorbers, a complete analysis of the finite structure with hundreds of interacting ports is applicable. The difference is determined by the presence of dissipation in the detector arrays, the phase of the reflected or re-emitted signal turned out to be undefined and the Floquet periodic boundary conditions are correct only for a phased array antenna. The spectral characteristics of the created filters, interferometers, and antenna arrays were measured in the frequency range 50–600 GHz.

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Section: Thin-film Filtersmentioning

confidence: 99%

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confidence: 99%

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Arrays of Sub-Terahertz Cryogenic Metamaterial

et al. 2021

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“…Nowadays, FSS array alone is used as an antenna which is for having good return loss but provides low gain in X-band application. To eliminate low gain in X-band, a patch is added in substrate 2 which is mentioned [6,7]. It consists of a flat rectangular sheet or "patch" of metal, mounted over a larger sheet of metal called a ground plane.…”

Section: Introductionmentioning

confidence: 99%

Flexible Frequency Selective Surface in Convoluted Square Form With Microstrip Patch for X-Band Application

Ramaraj¹

2020

PIER M

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This article reports a very efficient Frequency Selective Surface (FSS) with Convoluted Square Loop (CSL) shape is designed for applications in the X-band. They are designed on the surfaces of an FR-4 substrate. Frequency selective surface (FSS) is a combination of a periodic structure designed to selectively absorb, reflect, and transmit electromagnetic (EM) waves. FR-4 material provides durability and flexibility. A convoluted square loop structure reduces the size of the unit cell, and it also has a better stability with good gain. So, a CSL patch with a CSL FSS array with a slot on dual FR4 substrates is introduced for the improvement in overall gain and bandwidth. As per the design parameters, a structure is designed at 10 GHz. This structure is designed with ANSYS HFSS. The proposed antenna structure has a return loss of −36.424 dB, and VSWR value is 1.0307. The measurement results show a gain improvement of 6.266 dB and bandwidth of 5.882 dB.

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“…In another study [22], a band-stop FSS is designed for electromagnetic shielding in X-band with a minimum of 56 dB attenuation. A multi-layer miniaturised element band-pass FSS is proposed in [23], it demonstrates harmonics free frequency band up to 30 GHz. In [24], to obtain higher order filter characteristics a miniaturised FSS is designed using variable capacitor in single layer.…”

Section: Introductionmentioning

confidence: 99%

Novel angular‐independent higher order band‐stop frequency selective surface for X‐band applications

Kocakaya

Çakır

2017

IET Microwaves, Antennas & Propagation

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A higher order miniaturised band‐stop frequency selective surface (FSS) with angular stability performance for X‐band applications is presented in this study. The miniaturisation has been achieved by incurving the arms of conventional cross dipole shape inside. The unit cell size of FSS is diminished up to 75% compared to cross dipole FSS operating at the same resonant frequencies. Moreover, the presented FSS is designed to exhibit stable angular performance for incident angles up to about 60° for TE‐ and TM‐polarised waves. The maximum relative frequency deviation is 1.28% with respect to different angles of incidence. Although the designed FSS consists of two layers, higher order and sharp roll‐off filter characteristics have been obtained. The simulation of the proposed FSS is performed with the CST MWS. To verify the simulation results, the presented FSS is measured and a good match between the experimental and simulation results are obtained.

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Design of X-band frequency selective surface (FSS) with band pass characteristics based on miniaturized unit cell

Cited by 15 publications

References 17 publications

Arrays of Sub-Terahertz Cryogenic Metamaterial

Arrays of Sub-Terahertz Cryogenic Metamaterial

Flexible Frequency Selective Surface in Convoluted Square Form With Microstrip Patch for X-Band Application

Novel angular‐independent higher order band‐stop frequency selective surface for X‐band applications

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