Abstract
A novel design of a multi band microstrip antenna is presented in this work. The double modified U slots planar patch antenna is designed, simulated and fabricated to operate at 2.8 GHz (between 2.794 to 2.846 GHz), at 3.1 GHz (between 3.145 to 3.196 GHz), at 3.6 GHz (between 3.56 to 3.3.644 GHz), at 4.7 GHz (between 4.684 to 4.772 GHz) and at 5.4 GHz (between 5.423 to 5.526 GHz) for WiMAX/WLAN applications. One of the main challenges was keeping a low profile and low cost substrate (1.2mm and FR4 respectively) with penta-band frequency response without scarifying these characteristics. Each resonant frequency is accomplished by modifying each U slot and patch radiator itself. Simulations had been conducted using HFSS software and measured parameters such as reflection coefficient (S11 parameter) was performed with a vector network analyzer. Measured results confirm simulated results that the antenna could work within mentioned frequencies. Parametric study was conducted in order to study the effect of slots variation over the design.
Highlights
As a result of development of wireless and satellite communication systems, came out the miniaturization of electronic components and the appearance of microstrip technology and its antennas [1]–[4]. These miniaturization in telecommunications has become more evident during the last 35 years impulsed by low profile devices such as smartphones [5], radio frequency identification systems (RIFD) [6], wearable devices [7], and so on; reason why studying, designing and fabricating microstrip antennas (MSA) still receive attention by researchers around the world
Part of this attention recalls to overcome MSA disadvantages such as low gain, narrow bandwidth and so on; and improve its advantages such as low profile, low cost, capable to work at multi-frequency bands, among other characteristics; enabling these structures to be applied on current wireless communication system
In order to achieve multi-frequency response several techniques have been applied such as electromagnetic band gap structure (EBG) [9], ring resonator, defected ground structure antenna (DGS) [10], multilayer antenna, reconfigurable antennas [11], slots antennas [12], etc
Summary
As a result of development of wireless and satellite communication systems, came out the miniaturization of electronic components and the appearance of microstrip technology and its antennas [1]–[4] These miniaturization in telecommunications has become more evident during the last 35 years impulsed by low profile devices such as smartphones [5], radio frequency identification systems (RIFD) [6], wearable devices [7], and so on; reason why studying, designing and fabricating microstrip antennas (MSA) still receive attention by researchers around the world. A modified double U slot planar microstrip antenna is designed, simulated and fabricated to operate at 2.8/3.1/3.6/4.7/5.4 GHz for wireless communication such as WiMAX/WLAN applications
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