3D Frequency Selective Surfaces with close band spacing

Azemi, Saidatul Norlyana; Ghorbani, Kamran; Rowe, Wayne S. T.

doi:10.1109/apmc.2012.6421629

Cited by 11 publications

(7 citation statements)

References 10 publications

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“…Also increase the inner length of the elements shape will decrease the width track and increase the current flow path, this will increase the inductance and decrease the stop band frequency. So, smaller length of the square elements shape result in higher frequency response and smaller unit cell size will ensure good frequency response with vary incident angles [14]- [16].…”

Section: Frequency Selective Surface Square Designmentioning

confidence: 99%

Frequency selective surfaces on flexible thin plastic substrates

Zainudin

Azemi

Jamlos

et al. 2019

IJEECS

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The capability of the flexible substrate of the frequency selective surface (FSS) to filter out particular frequency is discussed in this paper. A new type of FSS are applied using flexible thin plastic substrate to enhance the performance of the conventional FSS that lacks of flexibility and cannot be used in bending surface. A simulation based investigation shows that the diameter or length of the square has a significant effect on the band-stop selective characteristic of the FSS. The frequency response of the band-stop are at 2.45GHz that drop at -10dB.

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Section: Frequency Selective Surface Square Designmentioning

confidence: 99%

Frequency selective surfaces on flexible thin plastic substrates

Zainudin

Azemi

Jamlos

et al. 2019

IJEECS

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“…More recently, studies have shown that three-dimensional (3D) FSSs offer additional capabilities that cannot be achieved by 2D FSSs [17][18][19][20][21][22][23][24][25]. In [17,18], a 3D FSS array of cylindrical elements was demonstrated offering greater flexibility and design control.…”

Section: Introductionmentioning

confidence: 99%

“…The frequency response can be tuned as well as producing either band-pass or band-stop operation by varying the length of the 3D cylindrical elements. Furthermore, with a dual cylinder 3D FSS architecture, a very selective FSS can be achieved without the addition of lumped components [19]. Alteration to the dual cylinder element height adjusts the frequency characteristics of the FSS, enabling a close band response to be achieved.…”

Section: Introductionmentioning

confidence: 99%

3D‐tapered resonators for FSSs with incident angle independence

Azemi

Baum²,

Ghorbani³

et al. 2017

IET Microwaves, Antennas & Propagation

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A three‐dimensional (3D) frequency selective surface (FSS) with a response that is independent of incident angle is presented in this study. The proposed FSS is a periodic array of 3D hollow‐tapered resonators. The proposed 3D FSS has reduced sensitivity to the angle of incidence of the electromagnetic wave compared with other 2D and 3D FSSs as a result of tapered structure. The transverse electric (TE) and transverse magnetic (TM) incident angle independences are obtained by tapering the width of a cylinder with a square cross‐section from the upper opening to the lower opening. Impressive frequency stability and transmission characteristics have been achieved up to 80° for both TE and TM incidence angles. The principles of operation along with guidelines for the design of the proposed FSS structures are presented in this study. A prototype of the proposed 3D‐tapered FSS is also fabricated and tested using a free‐space measurement system to verify performance.

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“…FSS has many application areas such as; in filter, multiband antenna, reflector systems [18], microwave [19], submillimetre wave [20] and terahertz [21] regions etc. As well as two-dimensional planar passive geometries, an active [22,23] and three-dimensional FSS [24] studies also exist in literature. The chirality admittance is another parameter that affects the resonance characteristics of FSS.…”

Section: Introductionmentioning

confidence: 99%

Chiral frequency selective surfaces comprised of multiple conducting strips per unit cell

Delihacioglu

2014

IET Microwaves, Antennas & Propagation

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The periodic structure based on an array of multiple conducting strips per unit cell on a chiral slab is investigated in this letter. Instead of a single strip, a unit cell is constructed by equal and unequal lengths of double or triple strips. In this case, the array is periodic, as opposed to the traditional individual elements. The co‐polarised reflectance, co‐polarised transmittance and cross‐polarised transmittance of new types of frequency selective surfaces (FSS) comprised of perfectly conducting double or triple strips on a chiral slab are analysed theoretically for a plane wave at normal incidence. The analysis is based on the modal expansions and moment methods together with the Floquet theorem. The unknown current coefficients induced on the conducting elements are computed by using the subdomain overlapping piecewise sinusoidal basis functions. By using two or three conducting strips per unit cell, FSS can be operated in different frequency bands. The double and triple strips per unit cell on chiral slab produce double and triple resonances, respectively. The structure can be used in band‐stop filter, multiband antenna applications and subreflector systems as well as the polarisation rotator. The computed result of free‐standing strip FSS is compatible with the measured and calculated results in literature.

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3D Frequency Selective Surfaces with close band spacing

Cited by 11 publications

References 10 publications

Frequency selective surfaces on flexible thin plastic substrates

Frequency selective surfaces on flexible thin plastic substrates

3D‐tapered resonators for FSSs with incident angle independence

Chiral frequency selective surfaces comprised of multiple conducting strips per unit cell

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