A wideband quad-layer transmitarray antenna with double cross slot rings elements

Moshiri, M.; Ghafoorzadeh-Yazdi, Ali; Heidari, Abbas Ali

doi:10.1016/j.aeue.2019.153031

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…In order to better modulate the electromagnetic waves emitted from the feed source, it is desirable that the transmitarray unit cell has a 360° adjustable phase range. In most studies, transmitarray unit cells use four dielectric substrates and four metal layers (with a profile of about 0.75λ), such as triple dipole cells [12], double circular cells [13] and double cross-slotted toroidal cells [14]. This can cause problems such as an increase in profile height as well as an increase in weight.…”

Section: Introductionmentioning

confidence: 99%

Near-field focused planar transmitarray with low profile design for microwave power transmission

Xiao

Fan

et al. 2023

IEICE Electron. Express

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This paper proposes a near-field focused (NFF) planar transmitarray with low profile operating in the C-band. A frequency selective surface (FSS) unit cell with a profile of only 0.15λ is designed by combining generalised scattering theory with full-wave simulations. To achieve better focusing, the transmission phase of the central unit cell of the transmitarray is adjusted to 90°. The focusing relative bandwidth is 13.7% at a centre frequency of 5.8 GHz, which enables a good focusing effect to be achieved. Meanwhile, this paper evaluates the microwave power received at the receiver when the proposed transmitarray used in MPT system. The measured results show that loading the proposed transmitarray can improve the received power up to 510%. Futhermore, in the range of 220~660mm from the transmitarray, the received power can be increased to more than 300%.

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Section: Introductionmentioning

confidence: 99%

Near-field focused planar transmitarray with low profile design for microwave power transmission

Xiao

Fan

et al. 2023

IEICE Electron. Express

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“…Lens antennas have attracted researchers’ attention because of their wide bandwidth and high gain. Transmitarray antennas have recently been proposed as a replacement for lens antennas, but their main limitation is their narrow frequency bandwidth [ 25 ]. The transformation optics theory may be applied to lens design.…”

Section: Introductionmentioning

confidence: 99%

Design of a Low-Reflection Flat Lens Antenna Based on Conformal Transformation Optics

Nazarzadeh

Heidari

2023

Micromachines

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In this paper, a wideband flat lens antenna with low reflection and good performance is presented based on conformal transformation optics (CTO). Physical space optimization is applied to eliminate singular refractive index values. Furthermore, we employ the optical path rescaling method to enhance the sub-unity refractive indices and to reduce reflection. Therefore, an implementable all-dielectric isotropic medium is obtained. The final flat lens profile comprises six layers with a constant permittivity value in each layer. Simulation results of the three-dimensional structure indicate that the designed flat lens operates in a wide frequency bandwidth. The flat lens antenna has an S11 value of less than −15 dB in the frequency range of 13 to 30 GHz. The proposed lens was designed and simulated using COMSOL Multiphysics, and radiation performance results were validated using the CST Studio Suite. The simulated radiation pattern shows that the side lobe level is less than −16.5 dB in two simulation software programs, and the half-power beam width varies from 5.6° to 2.7° with increasing frequency. Moreover, the simulated antenna gain is about 28.3–35.5 dBi in the 13–30 GHz frequency range.

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Wideband Two-Layer Transmitarray Antenna Based on Non-uniform Layers

Moshiri,

Heidari,

Ghafoorzadeh-Yazdi

2023

Wireless Pers Commun

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A wideband quad-layer transmitarray antenna with double cross slot rings elements

Cited by 7 publications

References 18 publications

Near-field focused planar transmitarray with low profile design for microwave power transmission

Near-field focused planar transmitarray with low profile design for microwave power transmission

Design of a Low-Reflection Flat Lens Antenna Based on Conformal Transformation Optics

Wideband Two-Layer Transmitarray Antenna Based on Non-uniform Layers

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