Sub-6 GHz Adjustable Broadband Radiation Pattern Microstrip Antenna for Wireless Communication System

Abstract

The present work demonstrates the design of a wideband 2 1 reconfigurable beam steering array for wireless communication systems. The designed antenna is powered by a microstrip line and consists of a two rectangular-shaped radiating elements and a rectangular planar ground. Its dimensions are as follows: 0.670 0.530 0.030. It executes three reconfigurable operating states by turning on and off two PIN diodes to change the direction of the main beam, as well as a beam tilt ranging from (30 ) to (38 ). A progressive analysis in order to enhance the antenna characteristic performances is furnished. The proposed reconfigurable antenna bandwidth is 18.18% (simulated), 18.84% (theoretical), and 19.42% (measured). The presented antenna has a maximum gain of 8.62 dB (simulated) and 8.45 dB (measured), and a higher efficiency ratio of 80% to 86% over the operating band (5 GHz-6 GHz). The designed antenna is fabricated using a low loss Rogers RT5880 substrate of 2.2 relative permittivity. The simulated, theoretical, and measured results are presented and exhibit a good accord, including the S 11 parameter and radiation patterns. In addition to the pattern reconfiguration, the obtained results are useful in order to improve the overall gain, antenna bandwidth and efficiency.