High-gain frequency reconfigurable Vivaldi antenna

Comunicació presentada a: 2014 IEEE Antennas and Propagation Society International Symposium, celebrat del 6 a l'11 de juliol de 2014 a Memphis, Estats Units d'Amèrica.This article proposes a frequency agile antenna whose operating frequency band can be switched. The design is based on a Vivaldi antenna. High-performance radio-frequency microelectromechanical system (RF-MEMS) switches are used to realize the 2.7 GHz and 3.9 GHz band switching. The low band starts from 2.33 GHz and works until 3.02 GHz and the high band ranges from 3.29 GHz up to 4.58 GHz. The average gains of the antenna at the low and high bands are 10.9 and 12.5 dBi, respectively. This high-gain frequency reconfigurable antenna could replace several narrowband antennas for reducing costs and space to support multiple communication systems, while maintaining good performance.This work is jointly funded by EPSRC UK, grant reference number: EP/G037264/1, and L-3 TRL Technology