A Fern Fractal Leaf Inspired Wideband Antipodal Vivaldi Antenna for Microwave Imaging System

Biswas, Balaka; Ghatak, Rowdra; Поддар, Д. Р.

doi:10.1109/tap.2017.2748361

Cited by 140 publications

(70 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper proposes a compact hexagonal fractal geometry which generates a highly directive radiation pattern over a broadband. Bandwidth enhancement of fractals with high gain has been achieved by techniques consisting of a superstrate [20] or higher iteration fractal shapes [21][22][23][24]. Only a limited number of planar antennas achieved both the aforementioned objectives [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Bandwidth enhancement of fractals with high gain has been achieved by techniques consisting of a superstrate [20] or higher iteration fractal shapes [21][22][23][24]. Only a limited number of planar antennas achieved both the aforementioned objectives [22][23][24]. Obtaining a directivity of 12.7 dB with 12% impedance bandwidth at the central frequency of the operating band, 3.52 GHz by using a Koch fractal boundary is presented in [22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground

et al. 2020

View full text Add to dashboard Cite

A highly directive fractal antenna with a novel shape is proposed in this paper. Finite Element Method based simulations were carried out on the first three iterations of a hexagonal fractal ring and the performance was measured in terms of the resonant behavior, directivity, radiation efficiency, current distribution, and radiation pattern. The second iteration fractal antenna radiates well along the broadside direction at the fundamental mode of operation. The ground plane was modified to improve the performance further. The antenna, etched on an FR4 substrate, has a directivity of 11.8 dB along the broadside direction with multi-frequency broadband performance over the frequency range of 3.12-7.46 GHz. Therefore, the proposed fractal antenna can be used for Wireless LAN applications. The antenna was fabricated and measured in order to validate the results.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground

et al. 2020

View full text Add to dashboard Cite

show abstract

“…From 1987, Vivaldi antenna design has given much consideration for medical applications for the identical properties that are desired for microwave imaging . For enhancing the performance, several researchers have introduced different methods with new techniques in the lower frequency such as tapered slot, planar directors, exponential slot edged, loaded with parasitic ellipse in the patch, bending feed, cavity‐backed, fern leaf‐type fractal layout, side slotted fin, artificial material lens and reflector, and corrugated Vivaldi . The tapered slot technique was introduced to achieve directional radiation in a square‐shaped Vivaldi antenna with limited bandwidth (BW) .…”

Section: Introductionmentioning

confidence: 99%

“…For breast phantom screening, a cavity back Vivaldi was designed to enhance the antenna performance with compact dimension and low gain . To achieve high‐performance antenna properties, a fern leaf‐type fractal layout antenna was proposed just for imaging applications . A complex structure and the low‐gain antipodal antenna were designed to achieve wide impedance BW .…”

Section: Introductionmentioning

confidence: 99%

“…20 To achieve high-performance antenna properties, a fern leaf-type fractal layout antenna was proposed just for imaging applications. 21 A complex structure and the low-gain antipodal antenna were designed to achieve wide impedance BW. 22 A corrugated multiple slotted Vivaldi was designed to enhance the antenna performance for MI application with a big object.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A 16‐modified antipodal Vivaldi antenna array for microwave‐based breast tumor imaging applications

Samsuzzaman

Islam

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this article, an improved method is introduced for enhancing the gain and directivity of a modified antipodal Vivaldi antenna, which is suitable for detecting malignant cells in the breast through microwave imaging. By slotting on the fins of the antenna with the addition of parasitic elliptical patch makes the antenna radiation more directive with more gain at the lower band range. The operating fractional bandwidth of this proposed Vivaldi antenna is 120% (2.50‐11 GHz) with compact dimension and directive radiation pattern with 7.20 dBi highest gain. The antenna time‐domain performance and the near‐field directivity (NFD) are also observed. Effective microwave breast phantom imaging system with an array of 16 antipodal antennas is designed where one antenna works as a transmitter and rest of the antenna works as a receiver in turn. The imaging performance is investigated with tumor inside the breast phantom using the Microwave Radar‐Based Imaging Toolbox open source software. Detection of tumor tissue inside breast phantom has been identified by analyzing the modified antipodal Vivaldi antennas' backscattered signal.

show abstract

A compact skull‐shaped defected ground super wideband microstrip monopole antenna for short‐distance wireless communication

Rahman

Singh

Samsuzzaman

et al. 2020

Int J Communication

View full text Add to dashboard Cite

SummaryIn this paper, a human skull‐shaped miniaturized super wideband microstrip monopole antenna is presented. The shape of the microstrip radiator is optimized and designed by combining different sizes of semicircular‐ and rectangular‐shaped radiating elements along with a microstrip feed line. On the other hand, a defected ground structure as the ground is placed at the opposite side of the radiator, which is fabricated on Rogers 5880 substrate. The electrical length of the proposed antenna is 0.240 × 0.200 × 0.016 λ at 3 GHz. The CST microwave studio is used for all the required simulations regarding antenna prototype design and optimization. The complete outcomes demonstrate that the proposed miniaturized antenna has a bandwidth of 24.5 GHz (3 to 27.5 GHz) having a radiation pattern in the form of nearly omnidirectional. The measured fractional bandwidth of the antenna is 160.66%, and the bandwidth dimension ratio is 3346.99, which is the highest among the literature review. The maximum calculated gain and efficiency are 6.3 dBi and 93%, respectively. For the time domain analysis, the antenna shows a decent performance in terms of the system group delay and fidelity factor. The numerical and experimental data are investigated throughout the study, which represents that the proposed antenna is suitable for short‐distance wireless communication like wireless local area network/Wi‐Fi/Worldwide Interoperability for Microwave Access (WiMAX)/ultra‐wideband and some other applications.

show abstract

A Fern Fractal Leaf Inspired Wideband Antipodal Vivaldi Antenna for Microwave Imaging System

Cited by 140 publications

References 10 publications

High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground

High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground

A 16‐modified antipodal Vivaldi antenna array for microwave‐based breast tumor imaging applications

A compact skull‐shaped defected ground super wideband microstrip monopole antenna for short‐distance wireless communication

Contact Info

Product

Resources

About