A Vivaldi Antenna with Improved Bandwidth and Gain (original) (raw)
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Design and Performance Enhancement of Vivaldi Antenna
Research & Development in Material Science
In this paper, a computer aided design of Vivaldi Antenna is developed which is used to study the effect of different parameters such as rate of opening of exponential slot and size of the radius of circular slot of the Vivaldi Antenna. The proposed design resulted in enhancement of gain and reduction in reflection losses. COMSOL Multi physics simulator is used to design the proposed Vivaldi antenna.
Design, Analysis and Evaluation of Results of Vivaldi Antenna for Millimeter Band Application
Characteristics of the antenna is one of the most important factors which should be considered in millimetre band. Extremely high frequency (EHF) has a number of applications that make it attractive for a variety of applications such as ground penetrating radars (GPR), remote sensing and phased arrays. This paper offered the design of a tapered slot Vivaldi antenna for millimetre wave application of which operates in GHz to achieve high performance in terms of bandwidth and directivity. Designed Vivaldi Antenna works in the frequency band of 42.2-50 GHz. All simulations are carried out by CST microwave studio software to obtain the voltage standing wave ratio (VSWR). Obtained VSWR Ranges from 1 to 2 and high directivity level ranges from 5.3 dBi at 45 GHz to 5.47 dBi at 48.5-50 GHz which shows the Progress in directivity and upper frequency range coverage. The Proposed Vivaldi antenna displays steady radiation pattern throughout the frequency band. The VSWR characteristic and Far-field radiation pattern are plotted to realize the antenna Mechanism.
Modelling and Analysis of Vivaldi Antenna Structure Design for Broadband Communication Systems
2020
In this paper, a method of designing a Vivaldi type phased array antenna (PAA) which operates at S-band (6–90 GHz) is presented and good active S-parameter characteristics. An antipodal Vivaldi antenna with a compact parasitic patch to overcome radiation performance degradations in the high-frequency band is proposed. For this purpose, a double asymmetric trapezoidal parasitic patch is designed and added to the aperture of an antipodal Vivaldi antenna. The proposed antenna has a peak gain greater than 7 dBi over the frequency range of 6–90 GHz.
Design of Triband Vivaldi Antenna for UWB Application
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2018
A tapered slot Vivaldi Antenna with Microstrip feed which can operate in the triband regions of Ku - 12.4-18 GHz, K -18 - 26.5 GHz, Ka - 26.5-40 GHz is proposed with compact design structure. Our antenna can operate in 5 different frequencies at 13.3 / 18 / 23.4 / 27.9 / 31.8 GHz with a bandwidth of approximately 1 GHz and each frequency has its own applications in Radar / Geostationary satellite / Fixed microwave application / Geostationary satellite, Local multipoint TV distribution / WiMAX. The proposed design of 2.3x1cm size with a microstrip feed of 0.5mm is simulated in the CST (Computer Simulation Technology) Studio Suite 2016. Thus a single triband antenna which can be used for various ultra-wideband applications was proposed.
International Journal of Antennas and Propagation
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...
Multiband Vivaldi Antenna for X and Ku band Applications
A Multiband vivaldi antenna is designed to operate in the X and Ku bands and simulational results are presented in this paper. Along with the ultrawide band, this particular vivaldi antenna is working in the range between 7 to 20 GHz at different resonent frequencies. Gain of more than 9dB and bandwidth enhancement of 0.92% can be achieved using this model. All the antenna parameters including design considerations and field distributions are presented in this paper.
Design and simulation double Ku-band Vivaldi antenna
Indonesian Journal of Electrical Engineering and Computer Science
Due to the tremendous development in the field of wireless communication and its use in several fields, whether military or commercial was proposed. A novel tapered slot Vivaldi antenna is designed and simulated at double band frequency (Ku-band) using computer simulation technology (CST) software 2020. The dimensions of the antenna are 2.3 × 1 × 0.4 mm3 with a microstrip feed of 0.5 mm. The proposed antenna is improved by cutting a number of circle shapes on the patch layer in different positions. The simulation results are divided into more sections according to the number of circle shapes cutting. The results are good acceptance and make the improved Vivaldi antenna valuable in many future wireless communication applications.
A Novel Method for Improving Antipodal Vivaldi Antenna Performance
IEEE Transactions on Antennas and Propagation, 2015
ABSTRACT Herein a new method for improving the directivity and bandwidth of the antipodal Vivaldi antenna structure is presented. The method is based on introducing a parasitic elliptical patch in the flare aperture to enhance the field coupling between the arms and produce stronger radiation in the endfire direction. This approach improves the directivity without compromising the low frequency performance and removes the need for electrically-thin dielectric substrates. The proposed antenna structure including the feeding line and transition measures 140 × 66 × 1.5 mm3 and has a peak gain > 0 dBi over the 2-32 GHz frequency range and > 10 dBi over the 6-21 GHz range, which is an improvement to what has been reported for Vivaldi antennas with similar size.
New Tapered Slot Vivaldi antenna for UWB Applications
A Simulation of a small sized antipodal Vivaldi antenna for ultra-wideband (UWB) applications is presented in this paper. By using commercial electromagnetic simulation software CST Microwave, some parameters like return loss (S11), Voltage Standing Wave Ratio (VSWR), radiation pattern has been performed to test the validity of simulation and verify eligibility of the antenna for UWB systems. The antenna design with dimensions of 58×60 mm achieves satisfactory impedance matching and radiation across the frequency band from 2.14 to 11.33 GHz with more than 136% fractional bandwidth.