A High Gain Broadband Modified Patch Antenna for ISM band/WLAN/WiMAX Applications
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A High Gain Broadband Modified Patch Antenna for ISM band/WLAN/WiMAX Applications Kalyan Mondal1 · Lakhindar Murmu2 Accepted: 11 November 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A modified patch antenna loaded with multiple number of slits for broadband high gain application is proposed. The electrical lateral dimensions of the proposed patch are 46 mm × 36.5 mm × 1.6 mm(0.51𝜆0 × 0.40𝜆0 × 0.02𝜆0 ), 𝜆0 is the free space wavelength at (3.3 GHz) lowest simulated resonant frequency of the proposed antenna. The proposed antenna offers two frequency bands of 2.23 GHz (5.09–7.32 GHz) and 0.34 GHz (7.52– 7.86 GHz) at 6.205 GHz and 7.69 GHz respectively. The maximum broad frequency band of 2.23 GHz with percentage bandwidth of 35.91% is achieved. A peak gain of 8.45 dBi is achieved. For validation of proposed antenna results, three different types of modified patches are used above the rectangular, circular and square ground planes. Patch type III with square shaped ground plane is fabricated for better performance. The simulated and measured results are in good agreement. It can be used in ISM band, WLAN, WiMAX and satellite communications. Keywords Modified patch · High gain · Dual band · Wireless communication
1 Introduction The need of broad band and high gain antenna is increasing day by day in modern wireless communication system. In this work both parameters (bandwidth and gain) of the antenna have been enhanced in a single prototype. Few reference works on given tropic are explained briefly to understand the novelty of the proposed antenna. In Ref. [1], bandwidth of the microstrip patch antenna was enhanced by rectangular patch antenna. The reported antenna was designed by loading two right angle slots at the two opposite edges and a U-shaped slot along the centre line of the rectangular patch. A miniaturized patch antenna was presented to enhance the bandwidth by transversal single interface concept in [2]. The bandwidth was enhanced in [3] by a single layer circular microstrip patch antenna with slots loaded at the optimum positions on the radiating patch. A high gain triple band * Kalyan Mondal [email protected] 1
National Institute of Technology Manipur, Langol, Imphal, Manipur 795004, India
2
Dr. SPM International Institute of Information Technology, Naya Raipur, Chhattisgarh 493 661, India
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microstrip patch antenna was designed by modified radiating patch in [4]. A compact dual band antenna with 5.16 dBi gain was designed in Ref. [5] by loading an open-ended quarter wavelength slot on the circular patch. It was reported in [6] that the bandwidth of the antenna was enhanced by dual open loops with individual half wavelength perimeters on the each side of the substrate. The bandwidth of the microstrip antenna was enhanced by controlling the coupling effect between radiator and feed structure in [7]. The bandwidth of the antenna was enhanced after designed A-shaped patch antenna with optimum dimensions in [8].
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