Abstract
In this work, design and analysis of microstrip patch antenna is carried out. A (2 X 1) antenna array is considered, with dimensions (W x L) as 35.11 mm x 27.13 mm. The dielectric substrate is taken to be FR4 epoxy with dielectric constant as 4.3 and loss tangent of 0.02. Dual trapezoidal slots are introduced to improve the gain considerations for the considered antenna array. The simulations are carried out and it is observed that the gain is improved. As a second stage in the work, to improve the bandwidth of operation for the dual trapezoidal antenna array, the concept of partial ground is taken into consideration. The simulations are carried in HFSS. It is found out that the introduction of partial ground improved the bandwidth of the antenna structure considered while preserving the gain to the maximum extent possible. The gain was found to be 7.0875 dB with centre frequency 2.4020 GHz. The frequency range below -10dB for the considered antenna array structure with partial ground was around 2.3 GHz to 2.6 GHz. This range is utilized in the WiMax application which covers the frequency ranges (2.3 GHz to 2.4 GHz) and (2.496 GHz to 2.690 GHz).
Highlights
The demand for wireless systems made the industry to make many new antenna structures suitable for working in the range of single band to multiple bands
The usual form of a microstrip patch antenna is a patch being placed on a grounded dielectric substrate [3]
The idea is to design an antenna for WiMax application, which covers ranges (2.3 GHz to 2.4 GHz) and (2.496 GHz to 2.690 GHz), the width and length are considered by substituting respective values in the empirical formula for rectangular patch antenna given in [14]
Summary
The demand for wireless systems made the industry to make many new antenna structures suitable for working in the range of single band to multiple bands. With the advantage of having extremely low profile, less cost and ease of fabrication, the microstrip patch antennas gained much importance in the wireless industry. Because of the vast research carried out in the recent years, several commercial applications of the microstrip patch antennas came into existence. Many researches are being done to improve the gain of the patch antennas [5]. This is implemented using different antenna sizes, shapes, parameters, designs and materials [6,7,8,9]. Slots are generally preferred when size of the antenna is a constraint. Mirrored trapezoidal slots are cut on the patches to improve the patch antenna characteristics. The antenna is designed and simulated using the HFSS software
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