scholarly journals Dual Frequency CPW Fractal Antenna for Wireless Applications

2019 ◽  
Vol 9 (1S5) ◽  
pp. 38-40
Keyword(s):  
Frequency Spectrum ◽  
Ground Plane ◽  
Fractal Antenna ◽  
Dual Frequency ◽  
Frequency Range ◽  
Band Frequency ◽  
Antenna Size ◽  
Wireless Applications ◽  
Ring Antenna ◽  
Planar Wave

A Co-planar wave guide fed rectangular ring antenna for WiFi and 5G applications is proposed in this paper. The operating frequency of the antenna is centered at two frequencies i.e 2.52GHz and 3.65GHz which are in S-band frequency spectrum. The main radiator is rectangular ring for whose inner corners are smoothed. The similar structure of the main radiator is etched from the ground plane making the proposed technique a fractal. For the proposed antenna FR4 laminate is used as substrate and a line feed is used to provide excitation. To achieve the high wide bandwidth we have implemented the fractal technique. The antenna size is 60mm×60mm×1.6mm and is radiating in the frequency range of 2.27GHz to 2.67GHz covering 400MHz of bandwidth and 3.5GHz to 3.82GHz covering 320MHz of bandwidth.

scholarly journals High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground

2020 ◽  
Vol 18 (1) ◽  
pp. 1-8
Author(s):  
Tharanga Premathilake ◽  
Jeevani Jayasinghe ◽  
Omar Saraereh ◽  
Karu Esselle ◽  
Rajas Khokle
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Current Distribution ◽  
Wireless Lan ◽  
Ground Plane ◽  
Fractal Antenna ◽  
Frequency Range ◽  
Mode Of Operation ◽  
Resonant Behavior ◽  
Ring Antenna

A highly directive fractal antenna with a novel shape is proposed in this paper. Finite Element Method based simulations were carried out on the first three iterations of a hexagonal fractal ring and the performance was measured in terms of the resonant behavior, directivity, radiation efficiency, current distribution, and radiation pattern. The second iteration fractal antenna radiates well along the broadside direction at the fundamental mode of operation. The ground plane was modified to improve the performance further. The antenna, etched on an FR4 substrate, has a directivity of 11.8 dB along the broadside direction with multi-frequency broadband performance over the frequency range of 3.12-7.46 GHz. Therefore, the proposed fractal antenna can be used for Wireless LAN applications. The antenna was fabricated and measured in order to validate the results.

scholarly journals A Cylindrical Wideband Conformal Fractal Antenna for GPS Application

2017 ◽  
Vol 6 (3) ◽  
pp. 64
Author(s):  
R. Sahoo ◽  
D. Vakula
Keyword(s):  
Conformal Geometry ◽  
Ground Plane ◽  
Antenna Design ◽  
Fractal Antenna ◽  
Frequency Range ◽  
Bandwidth Enhancement ◽  
Conformal Antenna ◽  
Operating Frequency Range ◽  
Definition Of ◽  
Good Agreement

In this paper, a novel wideband conformal fractal antenna is proposed for GPS application. The concepts of fractal and partial ground are used in conformal antenna design for miniaturization and bandwidth enhancement. It comprises of Minkowski fractal patch on a substrate of Rogers RT/duroid 5880 with permittivity 2.2 and thickness of 0.787mm with microstrip inset feed. The proposed conformal antenna has a patch dimension about 0.39λmm×0.39λmm, and partial ground plane size is 29mm×90mm.The proposed antenna is simulated, fabricated and measured for both planar and conformal geometry, with good agreement between measurements and simulations. The size of the fractal patch is reduced approximately by 32% as compared with conventional patch. It is observed that the conformal antenna exhibits a fractional bandwidth(for the definition of -10dB) of 43.72% operating from 1.09 to 1.7GHz, which is useful for L1(1.56-1.58GHz), L2(1.21-1.23GHz), L3(1.37-1.39GHz), L4(1.36-1.38GHz), and L5(1.16-1.18 GHz) in GPS and Galileo frequencies: E=1589.742MHz(4MHzbandwidth), E2=1561. 098MHz(4MHzbandwidth), E5a=1176.45MHz(=L5),E5b= 1207.14MHz, and E6=1278.75MHz(40MHz bandwidth). The radiation pattern exhibits an omnidirectional pattern, and gain of proposed antenna is 2.3dBi to 3.5dBi within operating frequency range.

Design of a high-gain dual-band antipodal Vivaldi antenna array for 5G communications

2021 ◽  
pp. 1-9
Author(s):  
Sumit Kumar ◽  
Amruta S. Dixit
Keyword(s):  
Frequency Spectrum ◽  
Impedance Matching ◽  
High Gain ◽  
Dual Band ◽  
Dual Frequency ◽  
Band Frequency ◽  
Dielectric Lens ◽  
Bottom Side ◽  
Simulation Results ◽  
Vivaldi Antenna

Abstract This paper presents a dual-band 1 × 4 antipodal Vivaldi antenna (AVA) array with high gain to operate over a dual-frequency band that covers the 5G frequency spectrum. The gain is enhanced by employing a dielectric lens (DL). The AVA array consists of four radiating patch elements, corrugations, DL, and array feeding network on the top side. The bottom side contains four radiating patches which are the mirror images of top radiating patches. The designed AVA contains 1 × 4 array antenna elements with a DL that is operating in the ranges of 24.59–24.98 and 27.06–29 GHz. The dimensions of the designed antenna are 97.2 mm × 71.2 mm × 0.8 mm. For the improvement in gain and impedance matching at the dual-band frequency, corrugation and feeding network techniques are used. The gain obtained is about 8–12 dBi. AVA array is tested after fabrication and the measured results are reliable with the simulation results.

Compact hybrid fractal antenna for wideband wireless applications

2016 ◽  
Vol 9 (5) ◽  
pp. 1191-1196 ◽  
Author(s):  
Yogesh Kumar Choukiker ◽  
Jagadish Chandra Mudiganti
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Fractal Antenna ◽  
Koch Curve ◽  
Antenna Structure ◽  
Wireless Applications ◽  
Antenna Performance ◽  
Compact Size ◽  
Measured Impedance ◽  
Acceptable Agreement

A compact size hybrid fractal antenna is proposed for the application in wideband frequency range. The proposed antenna structure is the combination of Koch curve and self-affine fractal geometries. The Koch curve and self-affine geometries are optimized to achieve a wide bandwidth. The feed circuit is a microstrip line with a matching section over a rectangular ground plane. The measured impedance matching fractal bandwidth (S11 ≤ −10 dB) is 72.37% from 1.6 to 3.4 GHz. An acceptable agreement is obtained from the simulated and measured antenna performance parameters.

scholarly journals Ultra Wide Band Antenna with Defected Ground Plane and Microstrip Line Fed for Wi-Fi/Wi-Max/DCS/5G/Satellite Communications

2020 ◽  
Author(s):  
Ashish Singh ◽  
Krishnananda Shet ◽  
Durga Prasad
Keyword(s):  
Radiation Pattern ◽  
Satellite Communication ◽  
Ground Plane ◽  
Wide Band ◽  
Satellite Communications ◽  
Ultra Wide Band ◽  
Wireless Applications ◽  
Directional Radiation ◽  
Ring Antenna ◽  
Theoretical Results

In this chapter, ultra wide band angular ring antenna has been proposed for wireless applications. It has been observed that antenna resonate from 2.9 to 13.1 GHz which has 10.2 GHz bandwidth. Further, it is observed that antenna has nearly omni-directional radiation pattern for E and H-plane at 3.5, 5.8, and 8.5 GHz. The theoretical analysis of the proposed has been done using circuit theory analysis. It was also found using simulation that antenna has good input and output response of 0.2 ns. Proposed antenna measured, simulated, and theoretical results matches for antenna characteristics, i.e., reflection coefficient and radiation pattern. Bandwidth of antenna lies between 2.9 and 13.1 GHz, so this antenna is suitable for Wi-Fi, Wi-Max, digital communication system (DCS), satellite communication, and 5G applications.

scholarly journals A CPW - Fed Octagonal Ring Shaped Wide Band Antenna for Wireless Applications

2018 ◽  
Vol 7 (3) ◽  
pp. 87-92 ◽  
Author(s):  
P. Khanna ◽  
A. Sharma ◽  
A. K. Singh ◽  
A. Kumar
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Wireless Applications ◽  
High Frequency Structure Simulator ◽  
High Impedance ◽  
Ring Antenna ◽  
Operating Bandwidth

A CPW – Fed octagonal ring shaped antenna for wideband operation is presented. The radiating patch of proposed octagonal ring antenna consists of symmetrical slot in place of conventional annular ring microstrip antenna. The ground plane consists of two rectangular slots, while the radiator and the ground plane are on same plane that utilizes the space available around the radiator. The proposed antenna is simulated through Ansoft’s High Frequency Structure Simulator (HFSS). Measured result shows balanced agreement with the simulated results. The prototype is taken with dimensions 47 mm × 47 mm × 1.6 mm that achieves good return loss, constant group delay and good radiation patterns over the entire operating bandwidth of 2.0 to 9.5 GHz (7.5 GHz). The proposed antenna achieves high impedance bandwidth of 130%. Thus, the proposed antenna is applicable for S and C band applications.

scholarly journals MIMO Antenna Design and Optimization with Enhanced Bandwidth for Wireless Applications

2020 ◽  
Vol 4 ◽  
pp. 22-26
Author(s):  
Mekala Harinath Reddy ◽  
D. Seela
Keyword(s):  
Reflection Coefficient ◽  
Ground Plane ◽  
Wide Band ◽  
Substrate Material ◽  
Metamaterial Structure ◽  
Band Frequency ◽  
Mimo Antenna ◽  
Design And Optimization ◽  
Wireless Applications ◽  
Positive Gain

This paper demonstrates a compact MIMO (Multi Input Multi Output) fractal type antenna for ultra-wide band applications. The proposed antenna is manufactured on a lowcost substrate material and the design is analyzed for various iterations in terms of reflection coefficient, gain, and bandwidth. The 50 Ω transmission line feed is used for both fractal patches and a metamaterial structure is used as the ground plane. The proposed design achieved a wide-band frequency response between 5.8 and 15 GHz, with the reflection coefficient of less than –10 dB. Reduced mutual coupling, positive gain and stable radiation patterns were observed throughout the operating band as well. The bandwidth of 9.2 GHz is achieved with the use of a metamaterial structure on the ground plane. The ECC and diversity gain obtained prove the excellent diversity performance of the antenna. The design was simulated using HFSS software and was tested in a lab.

Triple-band operation achievement via multi-input multi-output antenna for wireless communication system applications

2019 ◽  
Vol 12 (3) ◽  
pp. 259-266 ◽  
Author(s):  
T. Azari-Nasab ◽  
CH. Ghobadi ◽  
B. Azarm ◽  
M. Majidzadeh
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Ground Plane ◽  
Experimental Results ◽  
Frequency Range ◽  
Antenna Size ◽  
Mimo Antenna ◽  
Wireless Communication System ◽  
Operating Frequency Range ◽  
Triple Band

AbstractA multi-input multi-output (MIMO) antenna is designed and discussed for multi-band applications. The constituent antennas are composed of four L-shaped elements and a ground plane. When placed beside each other to form a MIMO antenna, a T-bar shaped parasitic structure is also embedded between the antennas on the backside of the substrate to increase the inter-element isolation. The triple-band performance of the antenna is observed at 2.15–2.73 GHz, 3.1–3.9 GHz, and 5.04–6 GHz. The isolation level of more than 20 is seen over the operating frequency range. The fabricated prototype of the MIMO antenna size is very compact (20 × 40 mm), printed on the FR4 substrate. Based on simulation and experimental results, the proposed design is useful for WiMAX and WLAN applications.

Broadband microstrip antennas with Cantor set fractal slots for vehicular communications

2020 ◽  
pp. 1-14
Author(s):  
Fatima Ez-Zaki ◽  
Hassan Belahrach ◽  
Abdelilah Ghammaz
Keyword(s):  
Ad Hoc ◽  
Ground Plane ◽  
Microstrip Antennas ◽  
Network Analyzer ◽  
Vehicular Communications ◽  
Frequency Range ◽  
Antenna Structure ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Vehicle Networks

Abstract Vehicle-to-everything communications (V2X), whose main objective is to improve security and efficiency, are provided by ad hoc vehicle networks that allow communication between vehicles. In the current study, a hexagonal microstrip patch antenna has been developed to cover the navigational frequencies, WiMAX at 3.7 GHz and DSRC/IEEE802.11p at 5.9 GHz to meet the demands of various vehicular applications. The antenna design is based on Cantor fractal slot, partial ground plane, and inset feed which is directly fed through the microstrip line. The proposed antenna shields the frequency band from 3.22 to 6.5 GHz with VSWR $\lt$ 2 within all the frequency bands. The presented antenna can resonate well in the 5.85–5.95 GHz band assigned for DSRC/IEEE802.11p and 3.7 GHz assigned for LTE/V2X. Simulated antenna gain varies from 3.06 to 5.25 dB within the operated frequency range providing an omnidirectional simulated radiation pattern in the most azimuth plane. To prove the validity of the simulation results, the chosen antenna structure has been fabricated and tested using a vector network analyzer MS2630. The measurement shows good results, which make the antenna suitable for wireless applications of interest.

CPW-fed circular-shaped fractal antenna with three iterations for UWB applications

2015 ◽  
Vol 9 (2) ◽  
pp. 373-379 ◽  
Author(s):  
Sarthak Singhal ◽  
Ankit Pandey ◽  
Amit Kumar Singh
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Fractal Antenna ◽  
Frequency Range ◽  
Fractal Structures ◽  
Antenna Structure ◽  
Uwb Applications ◽  
Good Agreement

A coplanar waveguide (CPW)-fed circular-shaped fractal antenna with third iterative orthogonal elliptical slot for ultra-wideband applications is presented. The bandwidth is enhanced by using successive iterations of radiating patch, CPW feedline, and tapered ground plane. An impedance bandwidth of 2.9–20.6 GHz is achieved. The designed antenna has omnidirectional radiation patterns along with average peak realized gain of 3.5 dB over the entire frequency range of operation. A good agreement is observed between the simulated and experimental results. This antenna structure has the advantages of miniaturized size and wide bandwidth in comparison to previously reported fractal structures.

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