Enhanced Reflectarray Antenna Using Elements With Reduced Reflection Phase Sensitivity

Mohammadi, Bahman; Nourinia, Javad; Ghobadi, Changiz; Moharram, M. A.; Karamirad, Mohsen; Alizadeh, Farzad; Mardani, Hossein

doi:10.1109/lawp.2018.2845439

Cited by 30 publications

(10 citation statements)

References 20 publications

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“…Also, in this comparison with Reference to , 1‐dB gain bandwidth of the proposed low‐cost planar reflectarray is narrower than References , but it has a better bandwidth than Reference . Finally, cross polarization of the reflectarray antenna in this article is lower than Reference , and its sidelobe level is lower than References 15, 17, and 18. The good performance of the proposed reflectarray antenna validates the effectiveness of hybrid elements reflective surface technology.…”

Section: Fabrication and Measurementsupporting

confidence: 57%

“…Compared with other high‐cost hybrid elements reflectarray antennas listed in Table , the antenna in this article can achieve low cost and the performance of high‐cost reflectarray antenna simultaneously. It should be emphasized that the aperture size of References in Table refers to the diameter of the circular reflecting surface, but the aperture size of the reflectarray antenna in this work refers to the side length of the square reflecting surface. It can be seen that compared the proposed antenna with Reference to , aperture efficiency of the low‐cost reflectarray antenna using FR4 substrate is lower than References , but it has higher aperture efficiency than Reference .…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…It should be emphasized that the aperture size of References in Table refers to the diameter of the circular reflecting surface, but the aperture size of the reflectarray antenna in this work refers to the side length of the square reflecting surface. It can be seen that compared the proposed antenna with Reference to , aperture efficiency of the low‐cost reflectarray antenna using FR4 substrate is lower than References , but it has higher aperture efficiency than Reference . Among them, the aperture efficiency is calculated respectively by the following definition:

η_{a} = ((), G \times λ^{2}) / 4 italicπA

where A denotes the physical area of the reflectarray antenna aperture.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…In 2014, researchers first proposed mixing three different elements of square patch (SP), SR, and ring‐loaded patch (RLP) to achieve the purpose of increasing the phase adjustment range and reducing the phase sensitivity . In recent years, the hybrid elements technology was adopted by many researchers to achieve a broadband and gain enhancement design of the planar reflectarray antenna …”

Section: Introductionmentioning

confidence: 99%

“…However, in Reference , researchers have used low‐loss but expensive substrate, such as RO4003 and Rogers5880, to support the array elements, which makes the cost of the antenna extremely high. In this article, we use this hybrid elements technology to increase the antenna gain for a reflectarray with a given aperture at low cost.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Gain enhancement for low cost planar reflectarray antenna using hybrid elements

Wang

Huang

Jin

et al. 2020

Int J RF Microw Comput Aided Eng

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By using a hybrid configuration of reflective elements of at least two different types, the gain of a planar reflectarray antenna is successfully enhanced. According to the calculated phase‐shift distribution, the reflecting surface is covered mainly by traditional low‐loss element such as square patches (SPs) in the first. Then the blank cells, of which the required phase‐shift exceed the operational range of the SP, are covered by other elements having large phase‐shift, for example, the three‐ring patches. As a result, the antenna efficiency is kept in a high level because the low loss elements are in majority. Meanwhile, the main beam efficiency is kept high because the sidelobe level is suppressed by large phase‐shift elements. For verification, an experimental array is fabricated on an inversely suspended, low cost FR4 substrate. The simulated result shows that the sample antenna is advanced in high gain and low sidelobe level, comparing with its traditional counterparts with only one type reflectarray elements. The measured result agrees well with the simulations, which show the gain of the antenna is higher than 26 dB, while the sidelobe suppression is lower than −19 dB. The aperture efficiency reaches about 47.04% at 14.0 GHz, which achieves the performance of high‐cost reflectarray antenna.

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Section: Fabrication and Measurementsupporting

confidence: 57%

Section: Fabrication and Measurementmentioning

confidence: 99%

η_{a} = ((), G \times λ^{2}) / 4 italicπA

where A denotes the physical area of the reflectarray antenna aperture.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Gain enhancement for low cost planar reflectarray antenna using hybrid elements

Wang

Huang

Jin

et al. 2020

Int J RF Microw Comput Aided Eng

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A broadband single‐layer reflectarray antenna with split ring element

Li,

Cai,

et al. 2024

Micro & Optical Tech Letters

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A broadband single‐layer reflectarray comprising three‐layer concentric split ring elements is proposed. The reflection phase is achieved by changing the flare angle of the inner and outer split rings. The resonance of the element is easily controlled by varying the relative relationships between the homomorphic patches. And the length of the split ring changes in the azimuth direction, which improves the utilization rate of unit space. The middle split ring acts as a parasitic structure with constant size, making the surface current distribution of the element more uniform to improve the element bandwidth. A reflectarray containing 256 elements is designed and tested. The measured results indicate that the peak gain is 25.3 dBi corresponding to the aperture efficiency of 42%. And the 1‐dB gain bandwidth of the reflectarray of 21.7% is achieved.

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