A Novel Wideband Tightly Coupled Dual-Polarized Reflectarray Antenna

Li, Wenting; Tu, Hancheng; He, Yejun; Zhang, Long; Wong, Sai‐Wai; Gao, Steven

doi:10.1109/tap.2023.3262969

Cited by 16 publications

(4 citation statements)

References 14 publications

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“…Wideband antennas have attracted great attention due to their ability of broad coverage across frequency band such as modern high-speed wireless communication systems [1,2,3,4,5]. For example, common forms for broadband antenna include dipole antenna [6 7], spiral antenna [8], log periodic antenna [9], Vivaldi antenna [10], etc.…”

Section: Introductionmentioning

confidence: 99%

A wideband dual-polarized crossed antenna with low profile and enhanced gain performance

Zhang,

Wu,

Wang

et al. 2024

IEICE Electron. Express

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A wideband dual-line polarized antenna with low-profile property is presented in this paper. The dual-polarized antenna consists of two crossed antenna elements over a metal reflector and is excited by RF connectors vertically. Here, the crossed antenna element is based on Vivaldi radiator to obtain wideband performance. By loading resistors on the patches of Vivaldi radiator, not only the impedance matching of the proposed antenna can be improved further but also the profile is reduced greatly. Whatever, the loaded resistors can also depress radiation efficiency of the antenna element to a certain extent, especially in the lower band. For this reason, three periodic slots etched on the Vivaldi radiator are introduced herein to enhance the gain performance. To verify the feasibility of the proposed design, a prototype has been fabricated and measured. The results show good performance of a relative bandwidth of 153% for VSWR ≤ 2 (2-15 GHz) and a low profile of 0.22 λL (in terms of the lowest frequency of the band). Besides, the prototype can achieve an average gain of approximately 5 dBi and a maximum radiation efficiency of 80% within passband.

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Section: Introductionmentioning

confidence: 99%

A wideband dual-polarized crossed antenna with low profile and enhanced gain performance

Zhang,

Wu,

Wang

et al. 2024

IEICE Electron. Express

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“…2 Also, a high-gain and wideband microstrip-fed slot antenna composed of an anisotropic metasurface (MTS) and an aperture-coupled structure is designed for an impedance bandwidth of 3.3-5.9 GHz and a peak gain of 10.7 dBi at 5.3 GHz. 7 The key is to design the unit cells that compose the MTS for achieving desired characteristics such as multimode resonances, 8,9 scattering coefficients, [10][11][12] surface-wave dispersions, 13,14 band-pass properties, 15,16 and bandgap properties. 17 For example, a wideband dual-polarized reflectarray antenna is designed with tightly-coupled dualpolarized elements for achieving stable radiation patterns across 3-8 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…17 For example, a wideband dual-polarized reflectarray antenna is designed with tightly-coupled dualpolarized elements for achieving stable radiation patterns across 3-8 GHz. 12 A wideband energy-selective surface (ESS) is designed with quasi-elliptic response and high-shielding effect achieved. The ESS exhibits a wide pass-band across 6-10 GHz and high out-of-band rejection with one transmission zero at 11.6 GHz under a low-power incidence.…”

Section: Introductionmentioning

confidence: 99%

“…The key is to design the unit cells that compose the MTS for achieving desired characteristics such as multimode resonances, 8,9 scattering coefficients, 10–12 surface‐wave dispersions, 13,14 band‐pass properties, 15,16 and bandgap properties 17 . For example, a wideband dual‐polarized reflectarray antenna is designed with tightly‐coupled dual‐polarized elements for achieving stable radiation patterns across 3–8 GHz 12 . A wideband energy‐selective surface (ESS) is designed with quasi‐elliptic response and high‐shielding effect achieved.…”

Section: Introductionmentioning

confidence: 99%

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Inverse design of reflective metasurface antennas using deep learning from small‐scale statistically random pico‐cells

You,

Lin

2024

Micro & Optical Tech Letters

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A small‐scale data‐selection method is proposed for deep‐learning‐based inverse design of reflective metasurface antennas (MAs). The overall design process involves discretization, coding, data selection, simulation, feature representation, training, prediction, and metasurface design. Unlike conventional method that selects the training data empirically after simulation from a large quantity of unit cells, the proposed statistically random data filtering (SRDF) method selects the training data set randomly before simulation by leveraging the geometric‐coding statistics of the unit cells. The advantages of the proposed data‐selection method include lower simulation cost (due to fewer simulations needed), improved generality, and higher design accuracy simultaneously. The design process starts from the discretization of a unit cell into a grid array of binaurally‐coded pico‐cells. Afterwards, the proposed SRDF method selects 0.01% of all the possible unit cells for simulation. With the simulated results, a deep‐convolutional‐variational‐autoencoder network is trained, leading to an accurate and bidirectional prediction of both the geometry and reflection phase of a unit cell in seconds. The proposed data‐selection method is validated by designing two reflective MAs with the predicted unit cells, each pointing a pencil beam off the boresight by 30° and 60°, respectively. Experiments are in line with full‐wave simulations.

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Design and implementation of a novel wideband dual‐polarised transmitarray antenna based on tightly coupled cross dipole cells

Zhao,

Li,

Jiang

et al. 2024

IET Microwaves Antenna & Prop

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A novel broadband dual‐polarised transmitarray antenna (TA) utilising tightly coupled cross dipole cells is proposed in this work. The transmitarray cell using the tightly coupling wideband principle comprises two radiation patches designed as two orthogonal planar dipoles with four interdigital capacitors, two meandered parallel plate transmission lines, and a ground. Each cell has a square shape and a dimension of approximately 0.28 where is the wavelength at central frequency 5.5 GHz. The transmitarray cell can achieve 475° phase shift at central frequency and transmission magnitude better than −2.5 dB within the working band. To verify the feasibility of this design, a tightly coupled dual‐polarised transmitarray antenna (TCDPTA) is modelled and manufactured. The transmitarray aperture size is approximately 4.1 4.1 . The simulation and measurement illustrate that the TCDPTA has stable and distortion‐free main beams whose side lobe levels are generally below −10 dB in the band of 3.0–8.0 GHz. The measured gain at central frequency is 16.2 dBi and peak gain is 19 dBi at 7.5 GHz. The working bandwidth is 90.9% and 3 dB gain bandwidth is 66.7%. The measured cross‐polarisation levels are below −15 dB at axial direction. This TA has potential applications for high‐date‐rate communication and high‐revolution radar imaging systems at C‐band.

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A Novel Wideband Tightly Coupled Dual-Polarized Reflectarray Antenna

Cited by 16 publications

References 14 publications

A wideband dual-polarized crossed antenna with low profile and enhanced gain performance

A wideband dual-polarized crossed antenna with low profile and enhanced gain performance

Inverse design of reflective metasurface antennas using deep learning from small‐scale statistically random pico‐cells

Design and implementation of a novel wideband dual‐polarised transmitarray antenna based on tightly coupled cross dipole cells

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