Implementation of Dual Band Antenna and Dual Band Antenna Array for WLAN Applications

Abstract

This paper presents the development and characterization of dual band and 1×4 dual band antenna array on a flexible polymide substrate.In this paper we have presented the design of a dual band microstrip antenna which will be operating in the wireless LAN band and IEEE 802.11 a/b/g. Dual-band antenna elements that support dual-polarization provide ideal performance for applications including space-based platforms, multifunction radar, wireless communications, and personal electronic devices. In many communications and radar applications, a dual-band, dual-polarization antenna array becomes a requirement in order to produce an electronically steerable, directional beam capable of supporting multiple functions. In this paper a dual band microstrip antenna is designed and its measurement results in terms of S(1,1) parameters and radiation patterns are studied. Microstrip design equations are introduced and validated by simulated results. This antenna is implemented on polymide substrate with = 4.3, h=1.6mm and operating frequency 5.25GHZ. By this design it is also shown that dual band operation is possible with proper position of the feed line and proper determination of inset size. Designed antennas is simulated by Ansoft High Frequency Structural Simulator (HFSS) by using the FEM (Finite element method).