Compact fractal antenna circularly polarised radiation for Wi‐Fi and WiMAX communications

Abed, Amer T.; Singh, Mandeep Singh Jit; Islam, Mohammad Tariqul

doi:10.1049/iet-map.2018.5213

Cited by 21 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The antenna shows improved impedance matching at all resonant frequencies. In [104], for the proposed fractal antenna at each stage, a new modified square patch with a half size of that used in the previous stage is added to shape the dual fractal-structure antenna which is shown in Fig. 20.…”

Section: Fractal Antennas For Multiband Wireless Applicationsmentioning

confidence: 99%

Fractal antennas and arrays: a review and recent developments

Karmakar

2020

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

In mathematical definition, a fractal is a self-similar subset of Euclidean space whose fractal dimension strictly exceeds its topological dimension which in turn involves a recursive generating methodology that results in contours with infinitely intricate fine structures. Fractal geometry has been used to model complex natural objects such as clouds coastlines, etc., that has space-filling properties. In the past years, several groups of scientists around the globe tried to implement the structure of fractal geometry for applications in the field of electromagnetism, which led to the development of new innovative antenna configurations called “fractal antennas” which is primarily focused in fractal antenna elements, and fractal antenna arrays. It has been demonstrated that by exploiting the recursive nature of fractals, several marvellous kinds of properties can be observed in antennas and arrays. The primary focus of this article is to provide a compressed overview of the developments in fractal-shaped antennas as well as arrays over the last few decades where the most prominent contributions mostly from IEEE journals have been highlighted. The open intention of this review work is to show an encouraging path to antenna researchers for its advancement using fractal geometries.

show abstract

Section: Fractal Antennas For Multiband Wireless Applicationsmentioning

confidence: 99%

Fractal antennas and arrays: a review and recent developments

Karmakar

2020

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…With the rapid development of various wireless communication systems, design of multi-band microstrip antennas has received great attention from researchers in both academic and industrial fields. Various approaches for designing multi-band antennas have been developed and investigated [1]- [4]. For example, a typical technique is to make slots on the radiation patch of microstrip antenna.…”

Section: Introductionmentioning

confidence: 99%

“…As discussed in [1], by etching two mental-insulator-mental (MIM) rings on a square patch, the surface current distributions have been changed, which effectively improves radiation and leads to form a multi-band antenna. Other commonly used methods for realizing multi-band antennas include adding coupling parasitic units [2], inserting stubresonant elements [3], as well as adopting the fractal iteration technology [4].…”

Section: Introductionmentioning

confidence: 99%

Multi-Band and High Gain Antenna Using AMC Ground Characterized With Four Zero-Phases of Reflection Coefficient

Gong

Yang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In this paper, a multi-band AMC-backed antenna system characterized with high gain and lowprofile is proposed. It is constructed by placing a quad-band coplanar-waveguide (CPW) antenna over an AMC with four zero-phases in the reflection coefficient. The CPW antenna consists of an ornamental-pillarshaped patch with the specially designed parasitic elements, and a defected ground structure (DGS), for the application in the frequency bands of 2.45, 3.5, 4.6 and 5.8 GHz. To improve the CPW antenna's radiation performance, an artificial magnetic conductor (AMC) ground with four zero-phases of the reflection coefficient is designed and employed as the reflector. The AMC unit cell is composed of four metallic nested rings (FMNR), whose innermost ring is connected in series to four lumped capacitors. It is observed that the proposed quad-band AMC ground can not only increase the gains of the multi-band antenna greatly but also combine the two intermediate frequency bands of the antenna into a broadband one. The prototypes of the antenna and the AMC array with 5 × 5 unit cells were fabricated and measured. It is found that in comparison to the antenna without AMC, the AMC-backed antenna obtains a gain enhancement by amounts of 4.93, 5.92, 5.54 and 4.95 dB at the frequencies of 2.45, 3.5, 4.6 and 5.8 GHz. The 10-dB impedance bandwidths of the AMC-backed antenna include three bands of 2.13-2.87, 3.22-4.75, and 5.54-5.86 GHz, with the corresponding relative bandwidths of 14.8%, 38.4%, and 5.3%. The proposed antenna can be potentially applied to the applications in WLAN, WiMAX, and 5G mobile communication systems. INDEX TERMS multi-band antenna, quad-band artificial magnetic conductor (AMC), coplanar-waveguide (CPW), gain enhancement.

show abstract

“…Fractal shaped antenna geometry realizes different performance modifications in MPAs. These self-similar structures can be inside the radiating patch or at an outer edge of patch exhibiting advantages like multiband response or lowering the resonance frequency bands respectively [3][4][5][6][7][8][9][10][11][12][13][14]. Various fractal shaped antenna geometries such as Sierpinski fractal, Koch fractal, and crown shaped fractals have been designed and developed by different researchers for various wireless applications.…”

Section: Introductionmentioning

confidence: 99%

“…A wide band circularly polarized tilted fractal slot monopole antenna has been presented in [4]. A compact fractal square shaped MPA for dual-band wireless applications has been reported [5], and a Sierpinski gasket fractal antenna structure and their properties have been discussed in [6].…”

Section: Introductionmentioning

confidence: 99%