DESIGN OF HEXAGONAL ANTENNA USING MEANDER FRACTAL GEOMETRY FOR WIDEBAND APPLICATIONS

摘要

A design of hexagonal antenna using Meander fractal geometry for wideband applications is investigated and presented in this paper. Partial ground plane is used in the proposed design, which is further modified by varying its length from 7 mm to 10 mm and it is fed by a microstrip transmission line whose width is also varied from 1 mm to 1.8 mm, for achieving the wideband characteristics. The overall size of proposed antenna is 44.92 × 45 mm~2; It operates over the frequency ranges of 2.89-6.09 GHz and 7.35 - 8.65 GHz, suitable for WiMAX(3.4- 3.69 GHz], WLAN (5.15- 5.35 GHz and 5.72 - 5.82 GHz), point to point high speed wireless communication (5.925 - 8.5 GHz), and X-band for satellite communications (7.25-8.39 GHz). Reasonable agreement has been reported between the simulated and measured results. Proposed antenna shows the omnidirectional and dipole-like radiation pattern at various frequency bands and also shows the good value of gain throughout the operating frequency range. In addition, the effects of the length of partial ground plane and the width of transmission line on the performance of proposed antenna is analyzed and discussed in detail.