Abstract
A concept to realize multi-functional reconfigurable antennas for wearable applications is proposed. The general structure simply consists of a textile circular patch with three varactor-loaded reconfigurable modules evenly distributed around its edge. Based on the proposed concept, a frequency-and pattern- reconfigurable, and a frequency- and polarization-reconfigurable wearable textile antenna are demonstrated. The first design is able to switch between broadside and omnidirectional radiation modes with frequency fractional tuning ranges of 57.3% and 27.2%, respectively. The second design radiates in broadside mode with the ability to switch its linear polarization between 0°, 120° or 240°, with a frequency tuning range of 31.9% at each of states. The antennas are fabricated and measured which successfully validate the operation concept.
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