Design and development of a wideband tree shaped fractal dielectric resonator antenna

Trivedi, Kedar; Pujara, Dhaval

doi:10.1109/aemc.2015.7509250

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…17). An average gain of 6 dBi was reported in this work [121]. The presence of two printed patches with two air layers between the patches and the DR block led to the design of an antenna with a return loss bandwidth of 25.6%.…”

Section: Latest Trends In Dramentioning

confidence: 60%

Broadbanding and multi-frequency in dielectric resonator antennas: a comprehensive review

Bhattacharya¹,

Ray

2022

Int. J. Microw. Wireless Technol.

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Dielectric resonator antennas (DRAs) are developed antennas that are lightweight, wideband, small-sized and have high radiation efficiency. A DRA is an appropriate candidate for any radio communication including radar applications mainly because of its high efficiency and wideband performance. As the development of DRAs has been a continuous process for more than five decades the plethora of the same has become magnificent in all possible ways. Scientists have walked the technical path for more than centuries and tried to meet the various challenges in the most graceful ways. Reduction of loss, lightweight, and desired radiation patterns are some of the issues which are effectively met by DRAs. This paper presents a brief comprehensive review of the state of art techniques, giving an exhaustive idea of achieving broadband and multi-frequency operations in the areas of DRAs. The paper associates the references of the past and correlates with the current and future trends of research in DRAs that could be of immense help to the young upcoming researchers interested in this field.

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Section: Latest Trends In Dramentioning

confidence: 60%

Broadbanding and multi-frequency in dielectric resonator antennas: a comprehensive review

Bhattacharya¹,

Ray

2022

Int. J. Microw. Wireless Technol.

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“…Fractal DRAs are also investigated by many researchers 13–27 but suffer from low bandwidth, 13–21 for example, 7.1–9.26, 13 2.3845–2.5083 and 3.4056–4.831, 14 3.5–5.0, 15 9.0–11.5, 16 2.23–3.1, 17 2.25–2.60 and 3.10–4.10, 18 5.52–10.72, 19 4.0864–10.49, 20 and 2.6–4.34 GHz 21 . Few other research articles proposed fractal geometry‐based DRA in 22–27 and nonfractal‐based DRA 28,29 having wide impedance bandwidth 23,24,27 but, two problems are associated with them: (i) complex fabrication process and (ii) high fabrication cost, for example, 4–10.1, 22 3.3–13.4, 23 2.8–12, 24 3.5–5.6, 25 4.32–6.30, 26 and 4.8–20 GHz 27 . In two recent articles, the authors have proposed that DRAs have nonfractal structures and wide bandwidth for UWB operation, for example, 1.6–12.2, 28 3.8–9.05, and 10–11.5 GHz 29 but have a comparatively large complex structure and offer low efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Fractal DRAs are also investigated by many researchers [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] but suffer from low bandwidth, [13][14][15][16][17][18][19][20][21] for example, 7.1-9.26, 13 2.3845-2.5083 and 3.4056-4.831, 14 3.5-5.0, 15 9.0-11.5, 16 2.23-3.1, 17 2.25-2.60 and 3.10-4.10, 18 5.52-10.72, 19 4.0864-10.49, 20 and 2.6-4.34 GHz. 21 Few other research articles proposed fractal geometry-based DRA in [22][23][24][25][26][27] and nonfractal-based DRA 28,29 having wide impedance bandwidth 23,24,27 but, two problems are associated with them: (i) complex fabrication process and (ii) high fabrication cost, for example, 4-10.1, 22 3.3-13.4, 23 2.8-12, 24 3.5-5.6, 25 4.32-6.30, …”

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confidence: 99%

“…The proposed DRA having a compact structure confirms a wide impedance bandwidth of 3.5-10.34 GHz (i.e., 98.84%), a maximum gain of 7.01 dBi, and maximum radiation efficiency of 98% compared with existing DRAs. [16][17][18][19][20][21][22][23][24][25][26][27] The variable gain and high radiation efficiency characteristics allow the proposed DRA to be applicable for cellular communication repeaters, local area networks (LANs), and vehicular communication, where mobile equipment can readily select the suitable radiation beamwidth and gain within the UWB range.…”

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confidence: 99%

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Inverted Sierpinski Carpet fractal‐inspired dielectric resonator antenna for wideband applications

Huda¹,

Saha²,

Karmakar

2023

Micro & Optical Tech Letters

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This communication explains a novel approach for attaining wideband inverted Sierpinski Carpet fractal geometry with a rectangular shape dielectric resonator antenna (DRA). Dielectric Resonators (DRs) have advantages, like, high gain, efficiency, wide bandwidth, low conduction loss, and minimum surface waves. Rectangular shape DR (ε rdr = 9.8, 14 × 12 × 8 mm 3 ) made from alumina (Al 2 O 3 ) is mounted on top of a primary square patch. Inverted Sierpinski fractal geometry provides the benefit to decrease the volume to the surface area without removing elements from the patch. The proposed fractal DRA is printed on an FR4 substrate (ε r = 4.4), fed with a 50-Ω microstrip feed line, and has a compact size of 38 × 38 × 9 mm 3 . At the backside of the antenna, an extended stub from the partial ground plane enhances impedance matching from 4 to 5 GHz. The prototype of the proposed DRA is fabricated and measured. The antenna functions with an impedance bandwidth of 98.84% for S 11 < − 10 dB, covering 3.5-10.34 GHz of the ultrawideband range. The proposed DRA offers a stable omnidirectional radiation pattern, maximum measured gain of 7.01 dBi, and has an average efficiency above 97% over the region of operation. These features make the proposed DRA applicable for cellular communication repeaters, local area networks, and vehicular communication applications.

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“…Based on the results of Ref., the authors have implemented fractal tree like geometry on T‐shaped DRA to achieve bandwidth improvement of about 14.8%. In Refs., the authors have discussed the tree fractal design and array design, respectively. In this letter, various parametric analysis, use of C‐shaped PDGS for low mutual coupling, and its fabricated results are discussed.…”

Section: Introductionmentioning

confidence: 99%

Mutual coupling reduction in wideband tree shaped fractal dielectric resonator antenna array using defected ground structure for MIMO applications

Trivedi

Pujara

2017

Micro & Optical Tech Letters

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In this letter, a novel fractal tree shaped two‐element dielectric resonator antenna (DRA) design for wideband multiple input multiple output (MIMO) applications is proposed. Fractal tree shaped geometry is proposed to achieve wideband characteristics while a C‐shaped periodic defected ground plane structure (PDGS) is used to achieve reduction in mutual coupling between two closely spaced antenna elements. Extensive parametric study is carried out to obtain desired mutual coupling reduction without much affecting the bandwidth of the DRA array. The proposed antenna was fabricated and its performance was tested. Measured impedance bandwidth of around 89.9% (–10 dB as reference) is achieved over a frequency band of 3.95–10.4 GHz. Measured mutual coupling less than −15 dB is obtained over the entire band of interest. Both the measured results are quite in accordance to the simulated results. The antenna design parameters, its associated results and parametric study of antenna parameters are discussed in the paper.

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Design and development of a wideband tree shaped fractal dielectric resonator antenna

Cited by 8 publications

References 5 publications

Broadbanding and multi-frequency in dielectric resonator antennas: a comprehensive review

Broadbanding and multi-frequency in dielectric resonator antennas: a comprehensive review

Inverted Sierpinski Carpet fractal‐inspired dielectric resonator antenna for wideband applications

Mutual coupling reduction in wideband tree shaped fractal dielectric resonator antenna array using defected ground structure for MIMO applications

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