CPW‐fed octagonal super‐wideband fractal antenna with defected ground structure

2017 ◽  
Vol 11 (3) ◽  
pp. 370-377 ◽  
Author(s):  
Sarthak Singhal ◽  
Amit Kumar Singh
Keyword(s):  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure

scholarly journals Performance Improvement of Sri Yantra Shaped Multiband Antenna with Defected Ground Structure

2018 ◽  
Vol 7 (3.31) ◽  
pp. 40 ◽  
Author(s):  
P Krishna Kanth Varma ◽  
Ch Murali Krishna ◽  
G Santhi Ratna Priyanka
Keyword(s):  
Performance Improvement ◽  
Frequency Spectrum ◽  
Microwave Frequency ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Multiband Antenna ◽  
Circular Patch ◽  
Antenna Characteristics

A hybrid fractal antenna inspired from sri yantra geometry covering multiple bands in the microwave frequency spectrum is presented in this paper with a reduced size of 45mm x 30mm x 1.6mm. The presented design aims at a multiband antenna with a polygon slots in- scribed in a circular patch with defected ground structure and the effect of Sri Yantra fractal iterations on the antenna characteristics are also studied. The gains achieved at respective bands for Sri Yantra geometry are 4.61dB at 4.04GHz, 2.71dB at 4.94GHz, 4.77dB at 5.88GHz, 3.41dB at 6.60GHz, 5.12dB at 7.24GHz, 3.11dB at 8.88GHz and 3.47dB at 10.92GHz.  

scholarly journals Design of a 1×2 CPW Fractal Antenna Array on Plexiglas Substrate with Defected Ground Plane for Telecommunication Applications

2021 ◽  
Vol 11 (6) ◽  
pp. 7897-7903
Author(s):  
C. Ben Nsir ◽  
J. M. Ribero ◽  
C. Boussetta ◽  
A. Gharsallah
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Systems Design ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Telecommunication Systems ◽  
Attractive Candidate

In this paper, a fractal antenna array for telecommunication applications is presented. The proposed antenna array is realized on a Plexiglas substrate, has 1×2 radiating elements, and dimensions of 170mm×105mm. The antenna array is composed of two Koch Snowflake patches and is fed by a Coplanar Waveguide (CPW) transmission line. Radiating elements and the ground plane are printed on the top side of the substrate. Defected Ground Structure (DGS) technique is employed to enhance the bandwidth and improve the impedance matching. The proposed antenna array operates at two frequency bands, 1.08-1.32GHz covering the GPS band and 1.7-3.7GHz covering the GSM 1800/1900, UTMS, Bluetooth, LTE, and WiMAX bands. In addition, the antenna has a good performance with efficiency and peak gain of 82% and 6.3dB respectively. These characteristics allow the antenna to be an attractive candidate for telecommunication systems. Design and analysis of different structures were carried out with Ansys HFSS.

scholarly journals Fractal Antenna Based on Split Ring Resonators with Defected Ground Structure

2020 ◽  
pp. 110-117
Author(s):  
Aruna R ◽  
Sreegiri S S
Keyword(s):  
Impedance Matching ◽  
Wide Band ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Circular Patch

In this paper presents the design of a circular microstrip fractal antenna (CMFA) loaded with parasitic edge-coupled (EC) split ring resonators (SRR) and defected ground structure (DGS). The basic resonant structure is a circular patch antenna designed at 3.2 GHz on FR4 substrate with relative permittivity 4.4, and 1.6 mm thickness. One iteration of circular patch and slots is employed to form it fractal and so as to attain multiband performance, the antenna is inset fed by a 50? microstrip line. Further the work is extended to demonstrate the effect of placing split ring resonator to particular position of substrate, improves the impedance matching leading to improved bandwidth. In addition L shaped defected ground structures are used to improve the antenna performance. . A comparison between fractal antenna with and without SRRs and DGS is made and the results verifies that a better gain improvement and return loss. The dimensions of the antenna are 45 mm x 45 mm and it can be used for ultra wide band (UWB) applications.

An on-chip circular Sierpinski shaped fractal antenna with defected ground structure for Ku-band applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Harshavardhan Singh ◽  
Sameen Azhar ◽  
Sanjukta Mandal ◽  
Sujit Kumar Mandal ◽  
Pamidiparthi Ravi Teja Naidu
Keyword(s):  
Frequency Band ◽  
Fractal Antenna ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
On Chip Antenna ◽  
On Chip ◽  
Footprint Area ◽  
Peak Gain ◽  
Ku Band

Abstract In this paper, a circular Sierpinski shaped on-chip fractal antenna with defected ground structure (DGS) is presented for Ku-band applications. The fractal and defected ground structure are employed to achieve higher bandwidth for the entire Ku-band (12–18 GHz). The proposed on-chip antenna (OCA) with a footprint area of 4π mm2 offers wide bandwidth of 7.22 GHz (11.94–19.13 GHz) with the resonating frequency of 15 GHz. At the resonating frequency, the designed antenna shows a peak gain of −19.76 dBi and a radiation efficiency of 55.6%. The co-polarization (CP) and cross-polarization (×P) characteristics of the proposed OCA shows good isolation of 18.05 dBi and 17.44 dBi in the two principal planes with ϕ = 0° and 90° cuts respectively. The measured result of the designed OCA prototype shows a good performance over the desired frequency band.

scholarly journals Tree shaped fractal antenna with multiband characteristics

2017 ◽  
Vol 7 (1.1) ◽  
pp. 333 ◽  
Author(s):  
B T P Madhav ◽  
V Subba Reddy ◽  
D Rajasekar Reddy ◽  
K Ravi Sankar ◽  
E V.S.Harsha Ramanujan ◽  
...  
Keyword(s):  
Weather Forecasting ◽  
Ground Plane ◽  
Wide Band ◽  
Substrate Material ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Radar Systems ◽  
Impedance Characteristics ◽  
Multiple Band

A tree shaped fractal antenna with U shaped slot and W-shaped slot has been designed and analyzed in this article by using ANSYS elec-tromagnetic desktop 17. The proposed antenna is analyzed taking FR4 substrate is taken as the substrate material. The proposed antenna exhibits multiband characteristics (2.75-3.17GHz, 4.1-4.8GHz, 5.1-5.3GHz and 5.4-6.3GHz, 7.21-12.8GHz) in the Ultra-wide band region. The path that is radiating by superposition of the rectangular patches and multiple-band operating frequency is obtained by increasing the U-shapes slots and w-shaped slot on the patch. The improvement in the impedance characteristics between the adjacent frequencies is achieved by using defected ground structure (DGS) on the ground plane as to cover the region of UWB application (3.1-10.6GHz). The proposed antenna works in the applications like Wi-Max, Weather forecasting RADAR systems and WLAN. 

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