Design of Adaptive Changing Structures with Bandwidth Control for Wideband Applications

Abstract: An adaptive changing antenna based on E-shaped structure with bandwidth controlled is discussed in this proposed work. Tuning antennas to configure dynamically or manually such that they can adapt to changing system requirements can eliminate those restrictions and offers additional functionality. A frequency reconfigurable E-shaped patch antenna can be utilized for improving the bandwidth. The bandwidth can cover the frequency range from 1.85 GHz-2.33 GHz. The performances of the proposed antenna, in terms of return losses and radiation patterns, with divergent DC bias voltages across the varactor diode, have been studied using computer simulation and measurement.

Keywords: Patch Antenna, Reconfigurable Antenna, Cognitive Radio, Two E-Shape.