An Improved Vivaldi Antenna for Vehicular Wireless Communication Systems

He, Hong S.; Shan, Wei; Fan, Chong; Mo, Zhi Chao; Yang, Fu Hui; Chen, Jun Hua

doi:10.1109/lawp.2014.2343215

Cited by 74 publications

(8 citation statements)

References 7 publications

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“…The structure of the proposed antenna is shown in Fig. 1b (Fei et al 2011; He et al 2014). The proposed antenna was improved wide impedance bandwidth by inserting rectangular slits in the radiator of the antenna, and the area of the antenna is achieved a reduction ratio of 15.5 %.…”

Section: Methodsmentioning

confidence: 99%

Implementation of rectangular slit-inserted ultra-wideband tapered slot antenna

Kim

Choi

2016

SpringerPlus

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In this paper, a tapered slot antenna capable of ultra-wideband communication was designed. In the proposed antenna, rectangular slits were inserted to enhance the bandwidth and reduce the area of the antenna. The rectangular slit-inserted tapered slot antenna operated at a bandwidth of 8.45 GHz, and the bandwidth improved upon the basic tapered slot antenna by 4.72 GHz. The radiation pattern of the antenna was suitable for location recognition in a certain direction owing to an appropriate 3 dB beam width. The antenna gain was analyzed within the proposed bandwidth, and the highest gain characteristic at 7.55 dBi was exhibited at a 5-GHz band. The simulation and measurement results of the proposed tapered slot antenna were similar.

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Section: Methodsmentioning

confidence: 99%

Implementation of rectangular slit-inserted ultra-wideband tapered slot antenna

Kim

Choi

2016

SpringerPlus

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“…It is still possible to increase Vivaldi antenna's gain by introducing a parasitic patch as director located at the antenna's aperture. Some published director shapes are elliptical (Nassar & Weller, 2015), rectangular slot (Rahayu & Pohan, 2018;He et al, 2014;Pandey & Meshram, 2015), and asymmetric parasitic patch (Bang et al, 2018). This paper proposes a new fractal-patterned patch as director for Vivaldi antenna.…”

Section: Introductionmentioning

confidence: 99%

Rotated Rectangular Slots and Mirrored Inversed Cantor-Sets on Ultrawideband Antipodal Vivaldi Antenna

Alimi

Prakoso

Riyadi

2019

Sinergi

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Variants of antipodal Vivaldi antenna (AVA) design suitable for access point working on 0.5 – 6.0 GHz are proposed in this paper. The novel designs were produced by employing three novel techniques to conventional AVA: (i) rotated-slot pattern to shift down the frequency cutoff and enhancing bandwidth, (ii) curve design to miniaturize rotated-slot-inserted antipodal Vivaldi, and (iii) fractal-director (Cantor set) to increase the gain of antipodal Vivaldi. Using FR4 (relative permittivity of 4.4) with an overall dimension of 300 mm x 143 mm x 1.6 mm the antenna designs are able to work at a frequency of 0.472 GHz to higher than 6 GHz with a maximum gain of 11.9 dBi.

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“…In this study, the antenna parameters are optimized to obtain the directive radiation patterns; however, it missed the resonance at a higher frequency. To enhance the gain and directivity, a customized Vivaldi antenna is fabricated with planner directors 32 . The antenna dimension is increased significantly (110 × 260 mm 2 ), and it maintains a noncontagious VSWR.…”

Section: Introductionmentioning

confidence: 99%

A Low Cost and Portable Microwave Imaging System for Breast Tumor Detection Using UWB Directional Antenna array

Islam

Mahmud

Kibria

et al. 2019

Sci Rep

169

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Globally, breast cancer is a major reason for female mortality. Due to the limitations of current clinical imaging, the researchers are encouraged to explore alternative and complementary tools to available techniques to detect the breast tumor in an earlier stage. This article outlines a new, portable, and low-cost microwave imaging (MWI) system using an iterative enhancing technique for breast imaging. A compact side slotted tapered slot antenna is designed for microwave imaging. The radiating fins of tapered slot antenna are modified by etching nine rectangular side slots. The irregular slots on the radiating fins enhance the electrical length as well as produce strong directive radiation due to the suppression of induced surface currents that radiate vertically at the outer edges of the radiating arms with end-fire direction. It has remarkable effects on efficiency and gain. With the addition of slots, the side-lobe levels are reduced, the gain of the main-lobe is increased and corrects the squint effects simultaneously, thus improving the characteristics of the radiation. For experimental validation, a heterogeneous breast phantom was developed that contains dielectric properties identical to real breast tissues with the inclusion of tumors. An alternative PC controlled and microcontroller-based mechanical MWI system is designed and developed to collect the antenna scattering signal. The radiated backscattered signals from the targeted area of the human body are analyzed to reveal the changes in dielectric properties in tissues. The dielectric constants of tumorous cells are higher than that of normal tissues due to their higher water content. The remarkable deviation of the scattered field is processed by using newly proposed Iteratively Corrected Delay and Sum (IC-DAS) algorithm and the reconstruction of the image of the phantom interior is done. The developed UWB (Ultra-Wideband) antenna based MWI has been able to perform the detection of tumorous cells in breast phantom that can pave the way to saving lives.

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An Improved Vivaldi Antenna for Vehicular Wireless Communication Systems

Cited by 74 publications

References 7 publications

Implementation of rectangular slit-inserted ultra-wideband tapered slot antenna

Implementation of rectangular slit-inserted ultra-wideband tapered slot antenna

Rotated Rectangular Slots and Mirrored Inversed Cantor-Sets on Ultrawideband Antipodal Vivaldi Antenna

A Low Cost and Portable Microwave Imaging System for Breast Tumor Detection Using UWB Directional Antenna array

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