Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/83385
Title: A new loop antenna for directional UWB links
Authors: Krishnan, S.
Kyaw, O.
Ning, L.Z.
Wei, L.L.
Seng, L.M. 
Issue Date: 2006
Source: Krishnan, S.,Kyaw, O.,Ning, L.Z.,Wei, L.L.,Seng, L.M. (2006). A new loop antenna for directional UWB links. Proceedings of the 1st IEEE International Conference on Wireless Broadband and Ultra Wideband Communications, AusWireless 2006 : 124-129. ScholarBank@NUS Repository.
Abstract: Loop antennas of circumference greater than a wavelength are generally known to have a good directive radiation pattern. However, for use in UWB applications, the variation of the radiation pattern with frequency must also be taken into account. Besides a good wideband radiation pattern, the impedance bandwidth of the antenna is also very important. The quality of a transmitted and received UWB pulse from the antenna will be a combination of both these factors. In this paper, we first investigate the characteristics of loop antennas with respect to both these factors. Next, we propose a new loop antenna configuration to overcome the limitations of the standard loop antenna for UWB applications. The new antenna consists of two concentric half-loops directly coupled to each other. The proposed antenna is analyzed using the Method-of-Moments (MoM). The theoretical and measured results agree with each other closely and attest to the fact that the new antenna has a far superior impedance bandwidth when compared with conventional loop antennas. Further, it is shown that the new antenna has a good gain and a useful radiation pattern for directional wireless links. The advantages of the antenna are conclusively demonstrated by successfully deploying it in a very high speed (500 Mbps) point-to-point UWB link.
Source Title: Proceedings of the 1st IEEE International Conference on Wireless Broadband and Ultra Wideband Communications, AusWireless 2006
URI: http://scholarbank.nus.edu.sg/handle/10635/83385
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