RECONFIGURATION OF VIVALDI AND LOG PERIODIC ANTENNAS

摘要

Four different antennas configurations have been shown that allow reconfiguration of the band of operation. As the Vivaldi antenna has a continuous radiating structure, filtering elements are integrated with the structure, which, as expected, have relatively low quality factors. Examples are shown that change the wideband properties into narrower pass bands, located at various frequencies and that place narrow stop bands in the wide operating band. In the Vivaldi with gaps in the radiating edges coupled to ring slots, there are significant design difficulties due to the interactions between the rings.