Abstract
In this paper, a frequency reconfigurable Vivaldi antenna with switched slot ring resonators is presented. The principle of the method to reconfigure the Vivaldi antenna is based on the perturbation of the surface currents distribution. Switched ring resonators that act as a bandpass filter are printed in specific positions on the antenna metallization. This structure has the ability to reconfigurate between wideband mode and four narrow-band modes which cover significant wireless applications. Combination of the bandpass filters and tapered slot antenna characteristics achieve an agile antenna capable to operate in UWB mode from 2 to 8 GHz and to generate multi-narrow bands at 3.5 GHz, 4GHz, 5.2 GHz, 5.5 GHz, 5.8 GHz and 6.5 GHz. The measurement and simulation results show good agreement. This antenna is an appropriate solution for wireless applications which require reconfigurable Wideband multi-narrow bands antenna.
Highlights
INTRODUCTIONResearch in antenna development has attracted many researches to satisfy the requirements of modern wireless applications such as developing active, compact and miniaturized antennas that can group many services [1,2,3]
Research in antenna development has attracted many researches to satisfy the requirements of modern wireless applications such as developing active, compact and miniaturized antennas that can group many services [1,2,3].Developing of radio systems for multimode terminal applications which involve a combination of Wi-Fi, WLAN, Wimax, Bluetooth... is obligatory [4,5]
The Ultra-Large Band that characterizes the Vivaldi antenna is the result of the tapered slot geometry that can be devised into two parts named the propagation and radiation parts
Summary
Research in antenna development has attracted many researches to satisfy the requirements of modern wireless applications such as developing active, compact and miniaturized antennas that can group many services [1,2,3]. The reconfigurability of antenna is achieved using PIN diodes, Varactors or MEMS to change its geometrical characteristics [1,4] Because of their benefits of flexibility, the capability to reduce interferences and compactness, frequency reconfigurable antenna is a better alternative which can be used in cognitive radio and multi-mode applications [9]. They are many modern systems which have great numbers of antennas that are operated at different frequencies.
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