Summary
International Symposium on Antennas and Propagation
2009
Session Number:2B4
Session:
Number:2B4-2
A Modified Fractal Square Loop Slot Antenna with Capacitive Coupling Fed by CPW
Thanakarn Suangun, Norakamon Wongsin, Chatree mahatt hanajatu phat, Prayoot Akkaraektha lin,
pp.413-416
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Antenna s are important for RF front ends of modern wireless and mobile applications. There have been many requirements of antenna designs for high performanc e, compact size, low profile, etc. There are va rieties of app roaches that have been developed over the yea rs, which can be utilized to achieve one or more of these antenna design objectives. Lately, the term of the fractal geometries was originally coined by Mandelbrot [1] to describe a family of complex shapes that have self-similarity or self-affinity in their geometrical structure. In literature reviews, we have found an advantage of the fractal geometries, which support the attributes of compact size by using the fractal technique, known as Koch monopole antennas [2]. This fractal antenna is created by iterating the initial triangle pulse through a monopole antenna. Then, a miniaturization of loop antenna using fractal concept, known as Minkowski square loop antenna [3], and other antennas [4 - 6] were created by using f ractal concept to miniaturize the antennas. In this paper, the modified fractal square loop slot antenna with coplanar-waveguide fed is presented. A technique of fractal geometry to generate the initial generator model in the slot square loop has been performed, resulting in antenna operation f or the application of WLAN IEEE 802.11 b/g 2.45 GHz. However, several characteristics of modified fractal square loop slot antennas will be investigated by simulation using the full wave method of moments (MoM) software package from IE3D. The experiments of the fabricated antenna pr ototype ha ve also been performed. The ra diation patterns o f the proposed antenna will be also evaluated. The organization of this paper is as follow. In section 2, a brief explanation on the designing configuration of the modified fractal square loop slot antenna will be given. Then, investigat ion and experiment of the properties for the proposed antenna will be discussed in section 3. Finally, the results are discusse d in section 4.