BANDWIDTH ENHANCEMENT OF VIVALDI ANTENNA USING TRIANGULAR SHAPED SLOTS

2016 ◽  
Vol 78 (6-3) ◽  
Author(s):  
Wan Nur Aqilah Wan Ahmad Khairuddin ◽  
Mohd Azlishah Othman ◽  
Muhammad Syafiq Noor Azizi ◽  
Mazri Yaakob ◽  
Mohamad Hafize Ramli
Keyword(s):  
Computer Simulation ◽  
Resonant Frequency ◽  
Return Loss ◽  
High Gain ◽  
Simulation Software ◽  
Simulation Technology ◽  
Wide Bandwidth ◽  
Bandwidth Enhancement ◽  
Measurement Result ◽  
Vivaldi Antenna

This paper discusses about a bandwidth enhancement of Vivaldi antenna loaded using triangular shaped. Firstly, a normal Vivaldi antenna using FR-4 substrate had been designed. Then, the triangular shaped slots had been added at the upper layer of the antenna. It shows the better improvement in return loss, gain, directivity and bandwidth operated at frequency of 10 GHz after the addition of the triangular shaped slot. The advantages of a Vivaldi antenna such as simplicity, wide bandwidth, and high gain at microwave.The return loss of this Vivladiantenna with triangular slot is – 18.495 dB at resonant frequency of 10 GHz while for Vivaldi antenna is - 17.818 dB at 10 GHz for measurement result. This proposed antenna had been designed and simulated using Computer Simulation Technology (CST) simulation software.

Bandwidth Enhancement of Metamaterial Loaded Microstrip Antenna using Double Layered Substrate

2017 ◽  
Vol 5 (3) ◽  
pp. 661 ◽  
Author(s):  
V. Srinivasa Rao ◽  
K.V.V.S. Reddy ◽  
A.M. Prasad
Keyword(s):  
Resonant Frequency ◽  
Rapid Growth ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Daily Life ◽  
High Gain ◽  
Metamaterial Structure ◽  
Bandwidth Enhancement ◽  
Layered Substrate

<p class="Abstract">Communication has become a key aspect of our daily life, becoming increasingly portable and mobile. This would need the use of micro strip antennas. The rapid growth has led to the need of antennas with smaller size, increased bandwidth and high gain. In this paper, a new version of micro strip patch antenna is designed by adopting double layered substrate concept and adding a layer of metamaterial structure to a square micro strip antenna. The antenna properties gain, return loss and bandwidth are studied to achieve better performance. The designed patch antenna has an improved bandwidth of 60% at a resonant frequency of 2.47 GHz. This antenna is designed and simulated by using HFSS software.</p>

scholarly journals ULTRA WIDE BANDWIDTH HIGH GAIN VIVALDI ANTENNA FOR WIRELESS COMMUNICATIONS

2017 ◽  
Vol 69 ◽  
pp. 105-111 ◽  
Author(s):  
Dalia Mohammed Nasha Elsheakh ◽  
Nermeen A. Eltresy ◽  
Esmat Abdallah Abdel Fattah
Keyword(s):  
Wireless Communications ◽  
High Gain ◽  
Wide Bandwidth ◽  
Vivaldi Antenna

scholarly journals Comparative Study between Planar and Bent Antenna Characterization

2018 ◽  
Vol 152 ◽  
pp. 03002
Author(s):  
Lau Zheng Tung ◽  
Ghafour Amouzed Mahdiraji ◽  
Lee Chia Ping
Keyword(s):  
Computer Simulation ◽  
Resonant Frequency ◽  
Navigation System ◽  
Comparative Evaluation ◽  
Impedance Matching ◽  
Simulation Software ◽  
Planar Antenna ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Different Characteristics

Smaller designs of antenna usually implemented on Wi-Fi modules or navigation system devices which requires smaller bandwidth such as Planar Antenna. There are some antenna application requires bent antenna such as wearable UWB antenna but the substrate used will have some defects after bending and crumpling from time to time. What if the planar antenna is designed that it can be bent and the bending affects the impedance matching and shift in resonant frequency? So, this research aims to achieve the limitation of the planar antenna to be bent at certain angle and given frequency range (1-8 GHz). The planar antenna is designed in the Computer Simulation Technology (CST) Software and the proposed antenna is then bend in the simulation software. The analysis of comparative evaluation for both planar and bent antenna is carried out on different characteristics such as evaluation between S-Parameters & Frequency and evaluation between Voltage Standing Wavelength Ratio (VSWR) & Frequency. The behaviour of radiation pattern for both antennas can also be obtained in the CST simulation.

scholarly journals Microstrip antenna with DGS based on CSRR array for WiMAX applications

2019 ◽  
Vol 9 (1) ◽  
pp. 157
Author(s):  
Ajay V. G. ◽  
Parvathy A. R. ◽  
Thomaskutty Mathew
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antenna ◽  
Patch Size ◽  
Return Loss ◽  
Ground Plane ◽  
Simulation Software ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Novel Method

<span lang="EN-US">This paper reports a novel method for designing a miniaturized microstrip antenna with DGS based on CSRR array which operates in the frequency of 2.6GHz for low band WiMAX application. The proposed antenna is designed using ANSYS HFSS simulation software. The antenna with optimized parameters is fabricated using FR-4 substrate of thickness 1.6 mm. The simulated and measured performances of the antenna in terms of return loss, directivity and radiation patterns are presented in this work. When Complimentary Split Ring Resonators (CSRRs) array are placed on the ground plane, the resonant frequency is shifted  to a lower value and patch size is reduced .The measurements were taken and compared with the simulated results. The performance characteristics obtained from the measurements show that the proposed antenna is suited for WiMAX application at 2.6GHz.</span>

Fault Simulation of Tanks Sight Based on Optical Parts Fretting

2013 ◽  
Vol 336-338 ◽  
pp. 542-546
Author(s):  
Xu Fan Zhang ◽  
Qiang Li ◽  
Xing Peng Yan ◽  
Gao Feng Cheng
Keyword(s):  
Computer Simulation ◽  
Fault Simulation ◽  
Simulation Software ◽  
Simulation Technology ◽  
Optical Elements ◽  
Simulation Research

Aiming at the problem of maintenance and it is difficult to find the fault caused by optical parts fretting. By means of mathematical tools to express optical parts imaging laws. With the computer simulation technology, combining with optical fretting theory and practical problems, producting a set of simulation software and showing the influence of optical parts fretting. The results show that the fretting of optical elements influence the imaging effect and firing accuracy. For the maintenance training of universal and serialized sighting telescope, the simulation research provides technical means.

scholarly journals Design and analysis of square shaped serrated patch antenna for ultra-wideband applications with single rejection band

2017 ◽  
Vol 7 (1.1) ◽  
pp. 525
Author(s):  
P Saleem Akram ◽  
B T P Madhav ◽  
G Jeevana Sravya ◽  
V Sudhakar ◽  
G Lakshmi Sirisha ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Patch Antenna ◽  
Microstrip Line ◽  
Return Loss ◽  
High Gain ◽  
Ultra Wideband ◽  
Bandwidth Enhancement ◽  
Band Region ◽  
Rejection Band

This article studies about the design and analysis of serrated patch antenna with a slot at the ground with microstrip line feed. Comparative analysis has been carried in five and ten serrated patches at top and side edges of the square patch. All design iterations have been carried out using commercially equipped tool HFSS 13. For bandwidth enhancement a slot has been placed at the ground in all iterations in common, later the return loss and gain have been analyzed and compared for all models. Finally, the proposed modal consists of ten serrations at the three edges of the square patch where it works on the ultrawide band region with high gain when compared to all models. The proposed antenna has its applications at WiMAX, WLAN 802.11, LTE 42/43 bands and works in the region of ultrawide band(3.1GHz-10.6GHz).and having rejection at 5-6GHz

Computer Simulation Technology of Precision Lapping Process of Polycrystalline Diamond

2012 ◽  
Vol 588-589 ◽  
pp. 1246-1250
Author(s):  
Qin Jian Zhang ◽  
Jian Yong Li ◽  
Yong Lin Cai ◽  
Heng Wang ◽  
Xiao Qing Yang
Keyword(s):  
Computer Simulation ◽  
Wear Resistance ◽  
Relative Velocity ◽  
Cutting Tools ◽  
Polycrystalline Diamond ◽  
Simulation Software ◽  
Instantaneous Velocity ◽  
Random Point ◽  
Simulation Technology ◽  
Abrasive Disk

Polycrystalline diamond, (PCD) is currently used in the industry for cutting tools of difficult-to-machine materials because of its superior characteristics such as hardness, toughness and wear resistance. But the PCD material is difficult to machine due to its above properties. Before making the PCD blank in varies tools, the lapping process is essential and necessary. The lapping quality depends heavily on the parameters. Therefore it is of great significance to study the path and velocity of lapping process for ensuring the lapping quality and uniform wear of abrasive disk. In this paper, on the basis of kinematics and geometry principle, the path equation was established. The complicated lapping process can be converted into two rotation movements, i.e. the movement of part against the center of lapping disk and rotation of fixture around its center. The relative path and relative velocity of random point of the part against abrasive disk were also analyzed and calculated. The computer simulation software was developed for figuring the path curves and instantaneous velocity of the lapping process. The results show that the abrasive disk can wear uniformly and the lapping quality can be raised. The application of computer simulation software provides the possibility to analyze the lapping principles, which is a simple, convenient and effective method.

scholarly journals Design and Simulation of Slot Dimensions in Aperture Coupled Hemispherical Dielectric Resonator Antenna

2019 ◽  
Vol 9 (2S3) ◽  
pp. 244-247
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Dielectric Resonator ◽  
Return Loss ◽  
High Gain ◽  
Slot Width ◽  
Dielectric Resonator Antenna ◽  
Slot Length ◽  
Directive Gain

Aperture coupled novel shaped Hemispherical Dielectric Resonator Antenna (HDRA ) and the various dimensions of slots are designed and analyzed by hfss software. The dielectric constant of dielectric hemisphere is € =9.8 and the substrate of dielectric constant is 2.96. aperture coupled novel shaped Hemispherical Dielectric Resonator Antenna (HDRA ) parameters are presented in this paper.. The effects of changing the slot length , slot width and position of slot on the antenna parameters and are presented in this paper, which are used for directive gain applications. As the change of slot dimension , it is observed that at the resonant frequency, it gives high gain and high negative return loss

scholarly journals Design and simulation double Ku-band Vivaldi antenna

2022 ◽  
Vol 25 (1) ◽  
pp. 396
Author(s):  
Huda Ibrahim Hamd ◽  
Israa Hazem Ali ◽  
Ahmed Mohammed Ahmed
Keyword(s):  
Computer Simulation ◽  
Wireless Communication ◽  
Simulation Technology ◽  
Band Frequency ◽  
Simulation Results ◽  
Vivaldi Antenna ◽  
Microstrip Feed ◽  
Ku Band

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 mm<sup>3</sup> 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.

scholarly journals Comparing simulated results of folded and unfolded log-periodic antenna used for observing the Sun

2019 ◽  
Vol 5 (2) ◽  
pp. 45-49
Author(s):  
Ли Ша ◽  
Li Sha ◽  
Йан Йихуа ◽  
Yan Yihua ◽  
Чень Чжицзюнь ◽  
...  
Keyword(s):  
Antenna Array ◽  
Frequency Band ◽  
Antenna Arrays ◽  
Return Loss ◽  
Low Frequency ◽  
High Gain ◽  
The Sun ◽  
Wide Bandwidth ◽  
Impedance Characteristics ◽  
Log Periodic Antenna

There are two antenna arrays located in Mingantu Spectral Radio Heliograph (MUSER). MUSER-I and MUSER-II cover the frequency band ranging from 0.4 to 2 GHz and from 2 to 15 GHz respectively. A third antenna array covering 30–240 MHz will be established in the coming years. A log-periodic antenna is one of the choices for MUSER low frequency band; it radiates structures capable of maintaining consistent impedance characteristics over a wide bandwidth. Due to the ability of achieving high gain, it is widely used in many broadband applications. In this program, folded and unfolded log-periodic antennas are simulated for the Meridian project. In order to improve its return loss, this antenna is optimized with the width of each pole and the height of the substrate. This optimized process has been implemented in the simulated software HFSS.

Sign in / Sign up

Export Citation Format

Share Document