Compact Multiband Antenna Design

Ong , Teik Kean (2013) Compact Multiband Antenna Design. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In these recent years, a great advancement and evolution has been achieved in the wireless communication system. Besides that, the market also demands for mobile and multi-functional devices. Thus, an antenna which plays an important role in transmitting and receiving radio frequency signals in wireless system, also need to be compact as well as to be able to work in various applications. This project aims to design, simulate, and fabricate a compact multiband antenna which operates at two operating frequencies, 2.4 GHz and 5.2 GHz. All antenna designs involved are simulated by using CST software. FR4 board has been used for simulation and fabrication for all related designs. A compact multiband antenna is an antenna which has compact and multiband characteristic. Multiband refers to more than one frequency band or it can be also referred to more than one application. In compact multiband antenna design process, single band antenna must first be designed. Later, some techniques will be applied so as to achieve the desired compactness and multiband characteristic of an antenna. The compact multiband antenna is fed with signal pulses by using a waveguide port. Furthermore, the simulation result shows that the antenna has covered the frequency bands ranged from 2.4 GHz to 2.484 GHz and 5.15 GHz to 5.35 GHz with return loss less than -10 dB. Besides that, this antenna can also function with at least 2 dB gain, 4 dBi directivity, and 50% total efficiency. Therefore, the compact multiband antenna in this project can operate at IEEE Bluetooth/ WLAN/ISM and WLAN 5.2 GHz in an acceptable condition.

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