Design and development of self tuning reconfigurable antenna with rf energy harvesting

Abstract

Miniaturization is the essential factor in mobile communication devices. The antenna consumes a significant space in the RF communication devices. For the past two decades, lot of research has been reported in the field of designing low profile multi-band antenna system. The design of multi-band antenna system is more complicate than the conventional antenna system. Generally two methods of multi-band antenna design procedure has been followed. They are single antenna and multiple antenna systems to resonate in multiband frequencies. The single antenna system with multiband frequency operation is the most demanding need in mobile communication devices because of its less area occupancy, reduced component count and low power operation etc. The main goal of this research work is to design and develop an individual antenna system that would operate in wide range of very popular mobile frequency bands, small in size and capable to harvest RF energy with affordable cost. The fractal design is implemented in single antenna technology which is used commonly in wideband reception. The fractal antenna structures are distinguished in nature which can occupy a compact space with complex structure. The compactness is the challenging design future for the multiband mobile communication devices. At the early stage of this research work a model of balloon shaped fractal structure is proposed. This design has been simulated and the structure has been fabricated in a FR4_epoxy board. Three iterations has been derived in this fractal design and a maximum of -40 dB return loss has been achieved at 2.4 GHz in zeroth iteration of prototype model. All the fractal iteration of simulation and hardware results are analyzed and validated. In order to get better antenna response in selective frequency bands the reconfigurable antenna is the suitable solution for multiband operation. In continuation with the fractal antenna design a reconfigurable antenna design has been analyzed with simulation and prototype fabrication. newline