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All Journal Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Godi Karunakar
GITAM Deemed to be University
Electrical & Electronics Engineering

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Effect of chaos factor in radiation pattern in planner antenna arrays with chaos adaptive invasive weed optimization Datla Rajitha; Godi Karunakar
Indonesian Journal of Electrical Engineering and Computer Science Vol 27, No 2: August 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v27.i2.pp692-700

Abstract

For mobile communication and spatial detection of antennas should have high directive radiation pattern, in this context pattern synthesis of planar circular antenna arrays is highly significant such design has been done inverse weed optimization. The basic objective e is to study invasive weed optimization in compression with modified chaotic adaptive invasive weed optimization. The focus of the study is the effect of chaotic factors suitable for sinusoidal mapping for chaos as applicable to the context of the design of antennas. Taking various numbers of elements of the antenna and the distance between the antenna’s radiation patterns are studied by varying chaos factors through MATLAB programming. It is found that the critical point of 2.3 for chaos factor makes the map enter into phase of chaos prior to the critical point is a phase of periodicity starting with chaos factor of 2. Below this value there is no chaos but a phase of convergence. These phases are useful having a trade of convergence and chaos. By varying the factor of chaos the impact on the radiation factor of non-uniform planar antennas has been found to give phases of convergence of chaos which are essential for making trade of between exploitation and exploration required in optimization.
Design and analysis of frequency reconfigurable antenna in S-band Maganti Apparao; Godi Karunakar
Bulletin of Electrical Engineering and Informatics Vol 12, No 5: October 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v12i5.4052

Abstract

One of the biggest challenges in modern communication systems is to provide a single antenna for multiple applications. Existing antenna systems are limited to some applications. Therefore, it is important to design a single reconfigurable antenna for multiple applications in current communication systems. To overcome this problem, a single antenna with frequency reconfiguration capability has been developed in this work. In this work, four different frequency reconfigurable antenna layouts are investigated. To provide frequency reconfigurability, the proposed antenna comprises two P-intrinsic-N (PIN) diodes placed between the microstrip line and patch. The antenna can resonate in four states and operate at three distinct frequencies without affecting the size of the antenna by toggling the 'ON' and 'OFF' modes of the PIN diodes. The antenna can operate at three different frequency ranges, depending on the switching state of the PIN diode 2.1, 2.4 and 3.0 GHz. The voltage standing wave ratio (VSWR), gain, return loss (RL) and radiation patterns of the antennas were simulated and measured. It is clear that the proposed antenna works at different operating frequencies. The gain and RL for the corresponding frequencies are significantly improved and the radiation pattern is symmetrical.
Co-Authors Datla Rajitha Maganti Apparao