Summary
International Symposium on Antennas and Propagation
2009
Session Number:1C2
Session:
Number:1C2-2
Analysis of a dual-band phased array of switched-beam elements
Pobsook Sooksumrarn, Monai Krairiksh,
pp.121-124
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
With the demand of modern wireless communication technology, the requirement for a dual-frequency operation is increased for supporting multifunctional services, such as voice, video, and data transmissions. In particular, dual-band operation in 2.4/5.2 GHz band for wireless local area networks (WLANs) using only one antenna are desired. Practically, multipath fading and cochannel interference can seriously degrade the performance of the wireless communication system. The multipath fading is caused by the different path lengths with different arrival angle that arise from the transmitted signal impinging on object in the environment, while the co-channel interference is due to undesired co-channel signals from other base stations or user terminals. To overcome or reduce this problem, the switched-beam antenna can be an effective solution. Dual-band antennas have been widely developed [1]-[3] but they have fixed radiation patterns. Tagapanij, et al., [4] proposed a dual-band antenna that can switch the radiation pattern. It is a stacked-patch antenna that operates in a higher mode and has bidirectional patterns. The feeding probe can be selected by using an RF switch to change the radiation pattern. This paper presents the analysis of a dual-band phased array antenna at the frequency of 2.45/5.2 GHz that main beam can be switched by switching phase excitation and element patterns.