DESIGN MIMO ANTENNA FOR UWB APPLICATIONS

Abstract

Ultra Wide Band (UWB) technology is rapidly developing area in the field of Wireless Communication. There are many challenges in this field, one of the challenge is to design an antenna which covers the entire UWB frequency range, the another challenge is to design an UWB Multiple input-Multiple output (MIMO) antenna which will increase the channel capacity and will allow several users to access the various services at the same time. The objective of this thesis is to design UWB antenna that operates in the frequency range from 3.1 to 10.6 GHz. Another objective is to design UWB MIMO antenna. The thesis starts with designing and implementing UWB antennas with discussions covering their operation, electrical behavior and performance. UWB antenna was designed and analyzed using microstrip feeding technique to achieve low profile. In Communication systems, Multiple Input–Multiple Output (MIMO) technology, which involves the use of multiple antennas at both the transmitter and receiver, is used to significantly enhance the data transmission performance and channel capacity. Antenna for this system was designed, to ensure that isolation between elements should be less than - 15 dB. The UWB MIMO antenna consists of four elements and designed with substrate FR-4 having the size 43mm x 43mm x 0.8mm. Results the designed antenna has an impedance bandwidth from 2.6GHz to 10.8GHz as well as isolation i.e. S21≤ -18 dB. Radiation efficiency up to 0.95. Envelope correlation coefficient (ECC≤ 0.007 ) , TARC (≤ -34dB) and diversity gain (≥ 9.96 dB).