Miniaturized Reflectarray Unit Cell Using Fractal-Shaped Patch-Slot Configuration

Oloumi, Daniel; Ebadi, Siamak; Kordzadeh, Atefeh; Semnani, Abbas; Mousavi, Pedram; Gong, Xun

doi:10.1109/lawp.2011.2181478

Cited by 41 publications

(34 citation statements)

References 13 publications

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“…The designed X‐band fractal reflectarray cell gives an improved maximum scan angle of 50°. Fractal‐shaped patch‐slot configurations have been studied as reflectarray unit cells in . Variable‐length slots on the ground plane have been used to adjusting the phase.…”

Section: Introductionmentioning

confidence: 99%

A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

Xue

Wang

Liu

2016

Micro & Optical Tech Letters

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A novel single‐layer microstrip reflectarray element with fractal structure is proposed. Ansoft HFSS is used to analyze the reflect phase for the fractal element in honeycomb lattice. A 469‐element prime focus microstrip reflectarray antenna composed of the proposed fractal elements is designed, manufactured, and measured. The measured gain level of 29.8 dB is obtained at the center frequency of 13.58 GHz with 1‐dB gain bandwidth of 15.3%. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:658–662, 2016

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Section: Introductionmentioning

confidence: 99%

A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

Xue

Wang

Liu

2016

Micro & Optical Tech Letters

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“…Hence, with an overall bandwidth of 600 MHz, our proposed compact Design_2 MPA is found to be best among all with balanced performance characteristics. The antenna reported in Reference has a better patch size reduction of 65% concerning the conventional antenna structure. But, it also encounters a low BW/H ratio compared to the compact DGS antenna.…”

Section: Resultsmentioning

confidence: 99%

“…Several size reduction techniques have been investigated and reported in the literature, such as employing fractal slotted reflectarray patch, utilizing asymmetric E‐shaped microstrip patch, and spirograph topology, shared aperture, and common ground plane based antenna miniaturization techniques. In 2012, Xun Gong and his group came up with the concept of antenna miniaturization using a Minkowski fractal shaped patch structure . They were able to reduce the size of the antenna up to 65% with the help of fractal of different iterations.…”

Section: Introductionmentioning

confidence: 99%

Direct and electromagnetically coupled compact microstrip antenna design with modified fractal DGS

Mishra

Sahoo

Hota

et al. 2019

Int J RF Microw Comput Aided Eng

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This article proposes ultra‐miniature microstrip patches with direct and electromagnetically coupled feeding mechanism for wireless communications at 10 GHz. Antenna size reduction is achieved here by loading a modified Minkowski fractal (type‐2) defected ground structure (MFDGS‐II) exactly beneath the radiating patch. The proposed method involves the selection of best DGS configuration through sensitivity analysis of the antenna structure. From different applications point of view, three different designs: a single layer direct fed patch and two electromagnetically coupled fed multi‐layered microstrip patch antennas are proposed here and designed with MFDGS‐II. The resonant frequencies of the antenna designs are reduced in a significant manner incorporating MFDGS‐II without any change in the physical size of the antenna. The prototypes of the proposed antennas are fabricated, and the performance parameters are measured. Compared with other existing structures, with a lower patch size of 0.20 λ0 × 0.15 λ0, the proposed single layered antenna with microstrip feed achieves a patch size reduction up to 67% and an overall volumetric reduction of 84%, respectively. Similarly, the proposed multi‐layered patch with proximity feed exhibits a maximum impedance bandwidth of 600 MHz and the aperture coupled fed patch has a realized gain of 6.2 dBi with radiation efficiency of 91% centered at 10 GHz. All three proposed compact antenna structures are best in three different aspects and have the potential to meet the practical requirements for X‐band portable wireless applications.

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“…Fractal‐shaped patch‐slot configuration is used in miniaturized reflectarray unit cell and Minkowski fractal is compare for different steps .…”

Section: Introductionmentioning

confidence: 99%

Ultra‐wideband tapered patch antenna with fractal slots for dual notch application

Zarrabi

Shire

Rahimi

et al. 2014

Micro & Optical Tech Letters

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In this article, the ultra‐wideband tapered patch antenna with fractal slots for dual notch application is presented. The antenna is printed on FR‐4 low‐cost substrate with relative permittivity of 4.4 and thickness of 1.6 mm. Total dimensions of the antenna is 45 × 44 × 1.6 mm3. In here, fractal slots was applied to represent dual notch band characteristics. The final antenna as demonstrated in this article has two rejection bands at 3 and 5 GHz and the antenna covers 2.1–12 GHz frequency band with the VSWR of less than 2. The current distribution in notch frequency and efficiency was checked for the whole frequency band and the maximum antenna gain is between 2 and 6 dBi. Finally, the experimental results are compared with the HFSS simulation ones. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1344–1348, 2014

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Miniaturized Reflectarray Unit Cell Using Fractal-Shaped Patch-Slot Configuration

Cited by 41 publications

References 13 publications

A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

A broadband KU‐band microstrip reflectarray antenna using single‐layer fractal elements

Direct and electromagnetically coupled compact microstrip antenna design with modified fractal DGS

Ultra‐wideband tapered patch antenna with fractal slots for dual notch application

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