Transmission Phase Limit of Multilayer Frequency-Selective Surfaces for Transmitarray Designs

Abdelrahman, Ahmed H.; Elsherbeni, Atef Z.; Yang, Fan

doi:10.1109/tap.2013.2289313

Cited by 269 publications

(108 citation statements)

References 11 publications

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“…In transmitarrays, at least three layers with quarter-wavelength spacings are necessary to meet a full 360° phase range requirement [13]. In our study, dual linear polarizations, low profile and a full 360° phase range are important for the transmitarray element design.…”

Section: Unit Cell Designmentioning

confidence: 96%

Circularly Polarized Transmitarray Antenna Using Low-Profile Dual-Linearly Polarized Elements

Tian

Jiao

Zhao

2017

Antennas Wirel. Propag. Lett.

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We propose a low-profile dual-linearly-polarized unit cell in X-band, and its capability is demonstrated by a circularly polarized transmitarray. The unit cell comprises three metallic layers etched on two dielectric slabs without air gap. Cross strips are inserted in cross slots on the top and bottom layers, and the T-slot structure is etched on the middle layer. The proposed unit cell has high isolation between the dual polarizations, and its total thickness is only 1 mm. Prototype of a 341-element transmitarray, which transforms the incident linearly polarized wave into the outgoing circularly polarized wave, is also fabricated and tested. The measured results show that the proposed transmitarray realizes 3.5% (9.8-10.15 GHz) axial ratio bandwidth and 4% (9.7-10.1 GHz) 1-dB gain bandwidth. The measured peak gain at 10 GHz is 21.9 dBi, with the aperture efficiency of 36%.

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Section: Unit Cell Designmentioning

confidence: 96%

Circularly Polarized Transmitarray Antenna Using Low-Profile Dual-Linearly Polarized Elements

Tian

Jiao

Zhao

2017

Antennas Wirel. Propag. Lett.

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“…The transmission coefficient of a single‐layer element is on a circular trajectory in the polar plot, and precisely follows the equation below regardless of the element geometry, as shown in Figure A:

T = cos φ \cdot e^{j φ}

where T is the complex transmission coefficient, and φ is the transmission phase. The equation is obtained based on the power conversation and E‐field continuity, and shows the transmission limit of a single‐layer element regardless of its geometry.…”

Section: Theoretical Analysis Of Multilayer Elementmentioning

confidence: 99%

A high gain broadband transmitarray antenna using dual‐resonant E‐shaped element

Luo

Yang

et al. 2018

Micro & Optical Tech Letters

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A high‐gain and broadband linear‐polarized transmitarray antenna is proposed in this paper, and its element is composed of 4 identical layers of E‐shaped patches separated by quarter‐wavelength air gaps. To cover the required phase range, the dual‐resonant E‐shaped element is developed; realizing broadband transmission, low cross‐polarization level, and stable oblique‐incident response. A transmitarray prototype using the 4‐layer E‐shaped element is designed, fabricated, and tested. The proposed transmitarray has a broad 1‐dB gain bandwidth of 15%, a high gain of 33.0 dBi, an aperture efficiency of 40%.

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“…The M-FSS approach requires the use of multiple identical dielectric/air gap layers, stacking on top of each other, for generating sufficient transmission phase range. It was reported in [1] that a single-layer transmitarray element can usually generate phase range of up to 90 • . Unit elements such as double square rings [2], spiral dipole [3] and square slot loaded with stubs [4] are the resonators which have been utilized for designing transmitarrays.…”

Section: Introductionmentioning

confidence: 99%

L-Probe Transmitarrays for X-Band Mobile Communications

Ng¹,

Lee²,

Lim³

2017

PIER B

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Abstract-Two novel wire transmitarrays, which are designed using a pair of co-joined L-shaped probes, have been developed for X-band mobile communications. By adjusting the orientation of the L probes, the polarization of the transmitting wave can be easily made either vertical or horizontal. Floquet method has been used for characterizing the transmission responses, and both transmitarray unit cells are found to have achieved a phase range of greater than 380 • and a linear phase sensitivity of 44.5 • /mm. Wide −1 dB gain bandwidth larger than 10% is achievable in both the vertically and horizontally polarized full-fledged transmitarrays, with radiation efficiency of ∼ 90%. The proposed transmitarrays have low radar cross section, which can be used for military applications.

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Transmission Phase Limit of Multilayer Frequency-Selective Surfaces for Transmitarray Designs

Cited by 269 publications

References 11 publications

Circularly Polarized Transmitarray Antenna Using Low-Profile Dual-Linearly Polarized Elements

Circularly Polarized Transmitarray Antenna Using Low-Profile Dual-Linearly Polarized Elements

A high gain broadband transmitarray antenna using dual‐resonant E‐shaped element

L-Probe Transmitarrays for X-Band Mobile Communications

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