Design and Investigation of Multiband and Wideband Antenna for Communication System

Abstract

Rapid growth in wireless communication systems leads to revolutionary changes in day to day newlinelife of society. In modern RF transceiver devices, space for the antenna element has shrunk newlinefor achieving compactness. The advanced wireless system requires a miniaturized antenna newlinewith low cost, low profile, and lightweight structure. Microstrip Patch Antennas are the right newlinesolution for this problem. Increased demand for compactness in wireless devices, along with newlinehigh data rate communication capabilities, has spurred the attention of researchers in the newlinedirection of the compact multi-band and wideband microstrip patch antenna devices. newlineMiniaturization technique for the antenna element includes etching slots on the ground and newlinepatch surface, use of shorting post/ wall, and use of the high dielectric substrate. These newlinetechniques are available in the reported literature so far. These miniaturization techniques may newlineresult in polarization decoration, surface wave weakening, and deformation of radiation newlinepatterns when the small ground plane is integrated with the antenna device. Multi-band newlinecharacteristics may be achieved by modification in the central radiator by bending, folding, newlinemeandering, and wrapping, but the more innovative techniques required. newlineInsertion of slots and slits in the patch geometry and ground plane imparts discontinuity. It newlinereroutes the surface current in comparison to the surface current of the primary antenna. The newlineincrease of the electrical length of patch and ground plane and strong coupling developed into newlinethe patch and the ground with a remarkable impact on the input impedance. The insertion of newlineslots also introduces new resonance that is utilized for the investigation of multi-band newlinecharacteristics in the antenna device. The inclusion of stubs to patch geometry also gives newlinemulti-band operating bands. newline