Telecomunicacoes

Progress In Electromagnetics Research Letters, Vol. 22, 71–81, 2011

A STACKED EQUILATERAL TRIANGULAR PATCH ANTENNA WITH SIERPINSKI GASKET FRACTAL FOR WLAN APPLICATIONS J. Malik and M. V. Kartikeyan Millimeter Wave Laboratory Department of Electronics and Computer Engineering Indian Institute of Technology, Roorkee 247667, India

Abstract—In present work, a microstrip Sierpinski modified and fractalized antenna using multilayer structure to achieve dual band behavior for WLAN applications has been proposed. Due to the space-filling properties of fractal geometry, the proposed antenna is smaller in size than the conventional Euclidean-type. An equilateral triangular patch antenna with Sierpinski Gasket fractal shape has been designed and studied. An electromagnetic coupled stacked structure of two different patches operating at two frequencies (2.4 GHz Bluetooth and 5.8 GHz Wireless LAN) has been designed for dual band WLAN applications.

1. INTRODUCTION In recent years, as the demand of portable systems have increased, low profile systems have drawn much interest for researchers. In making such low profile communication systems, the size of the antenna is critical. Microstrip antennas are very popular due to their properties, such as low profile, low cost, conformability and ease of integration with active devices. To the growing demand of MMIC (monolithic microwave integrated circuits) compatible antennas, patch antennas are good solution. To integrate these antennas in MMIC circuits for wireless communication applications the size of these microstrip antennas should be as small as possible without compromising on their performance. Therefore, many kinds of miniaturization techniques,
Received 23 December 2010, Accepted 1 February 2011, Scheduled 25 March 2011 Corresponding author: M. V. Kartikeyan ([e-mail]).

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such as using high dielectric substrates [1], applying resistive or reactive loading [2], increasing the