Coplanar Vivaldi Antenna with Koch Fractal Lens for L and S-band application

Nurhayati, Nurhayati; Setijadi, Eko; Oliveira, Alexandre M. de; Fukusako, Takeshi; Sukoco, Bagus Edy; Iskandarianto, Fitri Adi

doi:10.1109/icracos53680.2021.9702067

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…To improve the gain, the fractalshaped dielectric lens was loaded at the opening of AVAs in Karmakar and colleagues. [23][24][25] However, this kind of lens was not favorable for the design. The dielectric lenses in Ghosh et al 26 and Tangwachirapan et al 27 were simple, they were large in size, which is not conducive to the miniaturization of the antenna.…”

Section: Introductionmentioning

confidence: 99%

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An improved gain and directivity design of an antipodal Vivaldi antenna for ultra‐wideband detection

Wang,

Li,

Liu

et al. 2024

Micro & Optical Tech Letters

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A novel antipodal Vivaldi antenna (AVA) is proposed to achieve improved gain and directivity. To enhance the bandwidth of the antenna, a series of equal‐sized slots are etched onto the patch surface. Additionally, a dielectric lens with a fan‐shaped structure is integrated along the patch openings to boost gain. The length of the lens which will affect the radiation characteristics of the antenna in the end‐fire direction will be discussed. Furthermore, three arrays of directors are added to enhance the directivity. The fabricated antenna is then measured using a vector network analyzer in a microwave chamber to assess its performance. The results indicate that the antenna's minimum operating frequency is reduced by 0.5 GHz after etching the slots. Besides, the average gain is improved by 1 dBi after installing the fan‐shaped expansion structure. By introducing the directors, the sidelobe levels decrease and the 3 dB Half‐Power Beamwidth becomes sharper. Finally, an ultra‐wideband (UWB) detection experiment is designed to analyze the detection capability of the fabricated antennas. The results demonstrate that the antenna is well‐suited for UWB applications.

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Section: Introductionmentioning

confidence: 99%

“…The antennas mentioned above mainly improve the loss characteristics. To improve the gain, the fractal‐shaped dielectric lens was loaded at the opening of AVAs in Karmakar and colleagues 23‐25 …”

Section: Introductionmentioning

confidence: 99%