WIRELESS LOCAL AREA NETWORK (WLAN) ANTENNA DESIGN HAVING COMPACT SIZE WITH IMPROVED GAIN
Abstract
In this research, design of dual band antenna for access of WLAN (wireless local area network) over a short range communication is discussed. The designed dual band antenna is expected to cover frequencies bands of 2.4 GHz and 5.2 GHz. The proposed antenna must be able to work for both the frequencies. The characteristics of antenna has been studied and simulated according to required criterion of WLAN.
The basic design is based on WLAN slot antenna having narrow characteristic over both the WLAN bands. It is designed on FR4 substrate and computer simulation tool HFSS is used for simulation of proposed dual-band antenna. Overall characteristic of any antenna is greatly affected by antenna width, length and spacing between feeding line, thickness of antenna, spacing between antenna and ground plane and permittivity of the related substrate.
The designed antenna has compact planar monopole rectangular radiating element having I-shaped slot, on the same axis on rectangular patch to introduce dual band wireless communication applications. The height of the ground plane is 1.45mm that is designed on other side of the substrate. The resonant behavior of any WLAN antenna depends on the resonant bands that are joined in order to get complete response, these resonant bands are related to different fractional parts of proposed antenna. In order to identify each band of the antenna, current distribution is observed, it can be observed that the higher current distribution will lead to the antenna element resonating at this band. This behavior of antenna can lead to the novel design of antenna, furthermore the WLAN can be achieved though the modification process of various parts, and with the aid of related current distribution to antenna structure. In the design of this antenna, it has been found that ground plane and radiating element are the most effective parameters to achieve this objective. The resulting antenna has been formed to possess reasonable radiation characteristics, antenna gain and dual band response.
All the antennas that are presented in the research, have been modeled using the same FR4 substrate having thickness 1.45mm, and 4.4 relative dielectric constant. These antennas have been fed with a 50Ω microstrip feed line. Simulation tool HFSS has been used for the performance evaluation of different antennas presented in this research. By the application of fractal geometry on the radiating element, it has been observed, that resonance of two band antenna has improved as compared to literature and reasonable coupling of these bands have achieved.
The simulated design must fulfilled all the criterion that has established by federal communication commission (FCC). All the bench marks related to antenna design should be maintained like return loss must be below -10dB, gain should be positive and better than previous work. By proper tuning of Omni-direction radiation pattern, the proposed antenna can also be considered suitable for outdoor communication. Also, HFSS simulation for various parameters show that the proposed antenna is a good choice for dual-band WLAN communication applications for both short or long distances.
Downloads
Copyright (c) 2019 IJRDO - Journal of Electrical And Electronics Engineering (ISSN: 2456-6055)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Author(s) and co-author(s) jointly and severally represent and warrant that the Article is original with the author(s) and does not infringe any copyright or violate any other right of any third parties, and that the Article has not been published elsewhere. Author(s) agree to the terms that the IJRDO Journal will have the full right to remove the published article on any misconduct found in the published article.
