GRD Journals | Global Research and Development Journal for Engineering | International Conference on Innovations in Engineering and Technology (ICIET) - 2016 | July 2016
e-ISSN: 2455-5703
Compact Multi-Band Microstrip Antenna for Wireless Application A.Anandan Department of Electronics and Communication Engineering K.L.N College of Engineering Pottapalayam, Sivagangai 630 612 India Abstract A Multi-band rectangular micro strip antenna (RMSA) is proposed by a dual slot in the rectangular patch and a dual slot in the ground plane. Each open-ended slot in the single-slotted antenna is responsible to generate a wide impedance band that is shifted to lower frequencies by the effect of the ground slot. The dimension of the resultant antenna (12 * 8*1.5875 mm) reduces an average compactness to 53.73% when compared with a conventional unslotted rectangular micro strip patch antenna. The proposed antenna makes to operate in four bands of frequencies with large immunity to interference. The dual slots in the patch are responsible for two bands of frequencies and the open ended slot in the ground is responsible for two more bands in lower frequencies and the closed slot in the ground is responsible for the reduction of antenna size. The size and position of open ended slot is adjusted for the antenna to operate in two higher bands (5.306-5.59GHz and 5.784-5.990GHz) and open ended slot in ground is adjusted for lower band frequencies (2.578-3.052GHz and 3.382-3.688GHz).The obtained resonant frequencies can be used for WLAN and WiMAX. Keyword- Rectangular Micro Strip Antenna (RMSA), Wireless Application __________________________________________________________________________________________________
I. INTRODUCTION In recent years, the need for devices capable of operating in broadband is also driving research towards the design of multi-band radiating elements [1]. Micro strip monopole antennas have been widely used for wireless communications owing to their key advantages such as light weight, low profile and ease of fabrication [2]. Hence, micro strip antennas are promising for multi-band applications. Various techniques for design of dual-band WLAN antenna have been reported in [1]-[5]. In this paper, dual slots in the rectangular patch antenna is proposed for WLAN and WiMAX applications.
II. A SLOT IN PATCH AND GROUND OF RMSA The single rectangular open ended slot in the patch is used to increase the generated wave bandwidth. In order to achieve the slow wave effect to lower the resonant frequency, the ground plane area size is taken twice the size of patch. The signal return path is provided by the ground plane and the discontinuity in that path is provided by the closed ground slot which provides the way to achieve ‘slow wave effect’. These phenomena satisfy the infinite ground plane.
III. DUAL SLOTS IN PATCH WITH A GROUND SLOT IN RECTANGULAR MICROSTRIP ANTENNA Dual slots in the patch are responsible for generation of dual bands in such that the length and the position of slots are adjusted to vary the corresponding resonant frequency.
Fig. 1: Simulated reflection coefficient versus frequency plots of Antenna
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