A Compact CPW MIMO antenna for UWB communications with band notch characteristics

Project Title

A Compact CPW MIMO antenna for UWB communications with band notch characteristics

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

This project is concerned about a MIMO antenna that operates within the ultrawideband range and is capable of notching two bands. It has a wide range of applications in the field of communications and electronics. There have been several researches carried out in this field and after going through and studying the previous work, we decided to bring novelty and further contribute to the field of MIMO antenna by carrying out research and design an antenna that will be capable of notching two bands. For this purpose, an inverted L-shaped slots structures are used on the surface of radiators. The proposed design has an overall size of 14.1x 3.4 x 7.9 and covers the entire UWB spectrum from 3.02 GHz to 11.34 GHz except for the notch band from 4.1 GHz to 6.6 GHz. A high concentration of surface current is shown on the inner side of the antenna surface and inverted L-shaped stub when the design is simulated at 5.5 GHz to show the notch band affect. The simulated results in terms of return loss, surface current distribution and VSWR exhibit good antenna performance over the complete spectrum. the validity of the proposed design is also shown by comparing the simulated results with measured results.

Project Objectives

The rapid growth in wireless technologies and its applications raised the demand for ultra-wideband and multi-band antennas with compact size. In 2002, the frequency band (3.1 GHz to 10.6 GHz) was allocated by the federal communication commission for commercial use. In recent years, UWB has attracted researchers due to its great advantages in the short-range high-speed communication systems. The main issue with UWB antenna designing is the interference caused by other narrowband communication systems like WLAN, WiMAX etc. which can increase the electromagnetic interference. Therefore, it is necessary to filter out these interfering bands. Resonance structures are being introduced in this antenna to filter out the undesired or unnecessary bands. In our project, inverted L-shaped slots are being used to notch the WLAN band. The fact that it will be able to notch the WLAN band will result in decreasing the distortion in the antenna. The advantage of our CPW fed UWB antenna is its lower radiation loss, lower dispersion and extensive bandwidth as compared to microstrip antennas. Moreover, it is also low cost, lightweight, ease of fabrication and installation, small size and good performance makes them worthy of the communications system.

Project Implementation Method

In the first phase, the literature review was carried out and multiple researches have been studied. In the second phase, we are carrying out the simulations. In the third stage, we will fabricate the antenna and write a report and research paper. The project work has been divided into three members each of which will perform his duty in time and have to report their activity each week.

Benefits of the Project

The advantage of our CPW fed UWB antenna is its lower radiation loss, lower dispersion and extensive bandwidth as compared to microstrip antennas. Moreover, it is also low cost, lightweight, ease of fabrication and installation, small size and good performance makes them worthy of the communications system. Moreover, the notching of the WLAN band will result in lower distortion which will make it efficient for use. Upon completion, the antenna can be used in the telecommunication industry as it is cheaper and easy to manufacture and is also much efficient and smaller in size. It can be easily installed in portable devices due to its smaller size and can notch a certain frequency range which will result in better and distortion-free communication. 

Technical Details of Final Deliverable

The antenna consists of feedline and antenna and the ground which are etched on the surface. The antenna will be fabricated on an FR4 substrate which will then be delivered. The antenna is smaller in size (14.1x 3.4 x 7.9) and therefore can be easily fabricated. After fabrication, the antenna will be then tested in the Anechoic chamber where its radiation will be checked. SMA connectors will be connected at the end of the feed line to feed data.

Final Deliverable of the Project Hardware SystemCore Industry TelecommunicationOther Industries IT Core Technology OthersOther Technologies Wearables and Implantables, Clean TechSustainable Development Goals Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	27000
FR4	Equipment	2	3000	6000
SMA Connectors	Equipment	4	250	1000
Antenna Fabrication	Equipment	1	5000	5000
Printing, Binding, Project Model	Miscellaneous	1	10000	10000
Testing of Antenna Results	Equipment	1	5000	5000