A Miniaturized Broadband and High Gain Planar Vivaldi Antenna for Future Wireless Communication Applications (original) (raw)
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A Vivaldi Antenna with Improved Bandwidth and Gain
International journal of electrical and computer engineering systems, 2022
In this paper, the radiation characteristics of the conventional Vivaldi antenna are improved by proposing a novel design of a Vivaldi antenna. This proposed Vivaldi antenna is excited through three slots by using the L-probe microstrip feeder. The novel design can provide higher gain and wider bandwidth compared to that of the conventional Vivaldi antenna of the same size. The CST MWS software is used to simulate the proposed Vivaldi antenna. The measured and the simulated S-parameters were compared so that the feasibility of the proposed Vivaldi antenna was validated. The measured S-parameters show that the impedance bandwidth of the proposed Vivaldi antenna was from 1.976 to 7.728 GHz, while the measured maximum gain is 4.9 dBi at the operating frequency of 3 GHz.
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.
A Miniaturized Antipodal Vivaldi Antenna With Improved Radiation Characteristics
IEEE Antennas and Wireless Propagation Letters, 2011
In this letter, a modified antipodal Vivaldi antenna is presented. A novel tapered slot edge (TSE) structure is employed in this design. The proposed TSE has the capacity to extend the low-end bandwidth limitation and improve the radiation characteristics in the lower frequencies. A prototype of the modified antenna is fabricated and experimentally studied as well. The measured results show reasonable agreement with the simulated ones that validate the design procedure and confirm the benefits of the modification. Index Terms-Antipodal Vivaldi antenna (AVA), tapered slot edge (TSE), wideband antenna. I. INTRODUCTION A S THE demand of compact, smart, and multifunctional antennas for modern communication in both military and civil applications increases, wideband antennas attract more and more interests in academic field recently. With a history of more than 30 years, the tapered slot antenna (TSA) is still one of the most widely used wideband antennas. The tapered slot antenna, as its name suggests, is a class of antenna with a tapered radiator profile. The first TSA was introduced by Gibson [1] with exponential profile, which is also known as the ETSA or Vivaldi antenna. Other forms, such as linear TSA, constant-width TSA, parabolic TSA Fermi TSA, logarithmically TSA, etc., are introduced afterward [2]-[6]. The dual exponentially tapered slot antenna (DETSA, or also known as the Bunny ear antenna), which supplies additional design degrees of freedom, is also presented in [7] and [8]. Compared to other wideband antennas, the TSAs have moderately high directivity, planer structure, low profile, and symmetric beam in both E-and H-plane. Also, it is inexpensive to fabricate and easy to integrate. All those characteristics make the TSA a good candidate for phased array, remote sensing, and short-rage communication. The TSA belongs to the class of endfire traveling wave antennas, which has theoretically infinite bandwidth. The conventional TSA usually applies slotline as radiation fins. In the practical situation, however, the operating bandwidth is limited. First, the high-end working band is restricted by the transmission structure between the microstrip to slotline. In the low-end Manuscript
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.
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.
REV Journal on Electronics and Communications, 2020
This paper proposes a new design of low sidelobe level (SLL) and high gain linear printed Vivaldi antenna array. The array composes of two parts, which are a linear Vivaldi antenna array and a back reflector. The array consists of 10 single Vivaldi antennas and a series-fed network, those are based on Roger RO4003C substrate (ε = 3.55) with the dimension of 140 x 450 x 1.524 mm3. A new Bat algorithm with the amplitude-only control technique has been applied to optimize the output coefficients of the series-fed network for gaining a low SLL. The simulation results indicate that the proposed antenna provides a low SLL of -29.2 dB in E-plane with a high gain of 16.5 dBi at the frequency of 3500 MHz. A prototype of the proposed antenna array has been fabricated. The measured data has a good agreement with the simulated data.
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.
Research on a Novel Miniaturized Antipodal Vivaldi Antenna With Improved Radiation
—A novel antipodal Vivaldi antenna (AVA) is proposed in this letter. The addition of regular slot edges (RSE) helps the antenna lower the low-end operating frequency by 9% with the dimension unaltered, while the radiation patterns at higher frequencies are improved due to the loaded lens and the choke slot edges (CSE) configuration at the termination of the flares, which also contribute to the enhancement of antenna gain. The improved antenna is fabricated and verified experimentally. The measured results coincide with the simulated ones perfectly, which proves the feasibility of the novel design. Index Terms—Antipodal Vivaldi antenna (AVA), tapered slot antenna (TSA), ultrawideband (UWB).
An Array of M-Shaped Vivaldi Antennas for Uwb Applications
Progress In Electromagnetics Research Letters, 2017
In this paper, a novel M-shaped UWB Vivaldi array antenna is presented. First of all, a simple M-shaped UWB Vivaldi antenna is designed, and its properties of return loss, radiation pattern, VSWR, gain, etc. are analyzed. An array of M-shaped UWB antenna is simulated and designed after the successful implementation of the simple UWB Vivaldi antenna. The designed antenna has operating frequency from 3.25 GHz to 8.85 GHz covering 5.6 GHz bandwidth. The antenna has flat gain over entire frequency range. The proposed antenna is fabricated on a commercially available FR-4 substrate having relative permittivity of 4.4 and height of 1 mm. The proposed antenna has wide band and good flat gain over entire frequency range. The proposed antenna can be used in next generation wireless communication because of its efficiency, gain and wide bandwidth.
Asymmetrical Coplanar Vivaldi Antenna Design
European Journal of Science and Technology, 2022
In recent years, studies about miniaturization of wideband antennas had become popular with rapid development of antenna design technologies. Vivaldi antenna is one of these antennas which can be used in different areas such as microwave imaging, antenna arrays, ground penetrating radar applications. In this paper it is intended to approach with a novel method to reduce dimensions of Vivaldi Antennas because of its advantages such as simple configuration, wide bandwidth characteristics, low profile and low cost at fabrication process. Unlike traditional forms of Vivaldi Antennas it is used asymmetrical curves in this study. These curves have a different exponential coefficient to make the antenna have an asymmetrical shape. In this study the simulation results of the designed structure and a Coplanar Vivaldi Antenna were compared and the designed antenna showed similar characteristics. To verify the results a prototype of the Asymmetrical Vivaldi Antenna was fabricated on FR4 substrate with 4.6 dielectric constant. Measurement results illustrated that return loss of the designed antenna is below-10dB between 0.177GHz and 2.74GHz frequencies and the antenna have 93% fractional bandwidth. The measurement results match simulation results. Wideband frequency range, simple configuration and reduced dimensions make the designed antenna a good candidate for wideband antenna applications in future.