Authors: Yingsong Li , Wenxing Li , Qiubo Ye and Raj Mittra
Source: FERMAT, Volume 1, Article 2, Jan.-Feb., 2014
Abstract: Recently, ultra-wideband (UWB) technology has attracted much attention both in the industry and academia due to its low cost, potential to handle high data rate and relatively low power requirement. A UWB antenna is one of the key components for realizing the UWB systems. We note, however, that designing a UWB antenna to deliver high performance is much more challenging than it is when dealing with the conventional narrowband antennas. Typically, it is desirable for a UWB antenna to cover a wide bandwidth spanning the entire range of 3.1-10.6GHz, to produce an omnidirectional radiation pattern, and to have a compact size as well as a simple configuration. This paper focuses on the design and analysis of planar printed UWB antennas, and provides some representative performance results of previously designed UWB antennas to illustrate the advantages as well as drawbacks of these antennas. Present state of development of UWB antennas is reviewed in the paper and some future trends of UWB antenna designs are presented. Furthermore, the topics of wideband enhancement techniques for UWB antennas, incorporating band-rejection characteristics and reconfigurability are addressed, and their application to cognitive radio communication systems is examined in-depth.
Index Terms: Ultra-wideband antenna, band-notched antenna, multi-band antenna, reconfigurable antenna, cognitive radio antenna, slot antenna, CPW-fed structure, microstrip-fed structure
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A Survey of Planar Ultra-Wideband Antenna Designs and Their Applications