Abstract
This paper presents a new miniaturized planar Vivaldi antenna (PVA) design. The proposed antenna structure consists of an aperture tapered profile and cavity stub fed with a simple 50 Ω strip line feeding network. The designed PVA offers versatile advantages, including the miniaturized size and simple design, and exhibited an outstanding performance compared to the latest reported literature. The antenna occupies a minimal space with an electrical size of 0.92λ0 × 0.64λ0 × 0.03λ0. The antenna achieves an excellent relative impedance bandwidth 117.25% at 10 dB return loss, peak realized gain of 10.9 dBi, and an excellent radiation efficiency of 95% at the specific resonances. The antenna’s optimal features, that is, broadband, high gain, and radiation efficiency, are achieved with efficient grooves based approach. Besides, the proposed antenna results are also analyzed in the time domain, which shows the excellent group delay performance <2 ns in the operational band. The proposed antenna exhibited a stable far-field radiation pattern in orthogonal planes and strong distribution of current at multiple resonances. Simulation and the measured result show a good agreement. The proposed antenna has achieved optimal performance and is suitable for future wireless communication applications.
Highlights
In modern wireless communication systems, the implementation and demand of a high data rate transmission scheme are increasing rapidly [1]. e antenna systems, which may exhibit optimal performance and cover multiple wireless communication services, are very suitable for modern communication systems. erefore, in order to fulfill the demand, compact, high gain, wideband, and radiation efficient planar Vivaldi antenna (PVA) are required
The PVA is a good choice for future wireless communication applications, including ultrawideband (UWB) spectrum [3, 4], intersatellite communication [5], medical imaging [6], notch band [7], wide beam scanning phased array [8], ground-penetrating radar (GPR) system [9], and radar [10]. e PVA has demonstrated broad impedance bandwidth (BW), high gain, good radiation efficiency, and wide beam pattern
Several designs based on different slot shapes [18,19,20] were suggested to achieve the required gain, acceptable BW, radiation efficiency, and perfect impedance matching. e reported antennas consist of intricate structures and exhibited a satisfactory performance in terms of BW, peak gain, and radiation efficiency. e coplanar waveguide (CPW) fed bowtie slot antenna with large size achieved triple-band response reported in [21]
Summary
In modern wireless communication systems, the implementation and demand of a high data rate transmission scheme are increasing rapidly [1]. e antenna systems, which may exhibit optimal performance and cover multiple wireless communication services, are very suitable for modern communication systems. erefore, in order to fulfill the demand, compact, high gain, wideband, and radiation efficient PVA are required. E proposed model achieves the relative BW of 117.25% with |S11| better than 10 dB, the peak realized gain of 10.9 dBi, the excellent radiation efficiency of 95%, good performance of group delay
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