Abstract:
This thesis presents a CPW-Fed Planar Circular Monopole Antenna is designed on coplanar-waveguide-fed structure. This technique can be used in wideband frequencies. The CPW-Fed is applied on planar circular patch monopole antenna. The CPW-Fed antenna has the advantages of active and passive components. The CPW-Fed antenna has small size, light weight and simple structure. The antenna is applied in wireless communication systems.
The first propose a CPW-Fed Planar Circular Monopole Antenna is designed on coplanar-waveguide-fed structure. Then, the antenna is developed with frequency band notch. The frequency bandwidth within range of 3.31-3.73 GHz. Both propose antenna are fabricated on FR-4 substrate with a dielectric constant of 4.4 and a thickness of 1.6 mm.
The simulation of a CPW-Fed Planar Circular Monopole Antenna can be proved that bandwidth is within a range of 3.258-6.416 GHz, fractional bandwidth is 57.42 % and return loss is better than -10 dB. The measured bandwidth is within a range of 3.3-8 GHz, fractional bandwidth is 83 %. The antenna is developed with frequency band notch. The simulation can be proved that bandwidth is within a range of 1.63-3.28 GHz, fractional bandwidth is 67.2 % and bandwidth is within a range of 3.76-7 GHz, fractional bandwidth is 60.22 %. The frequency band notch bandwidth is within a range of 3.31-3.73 GHz, fractional bandwidth is 11.93 %. A resonant frequency for frequency band notch is 3.5 GHz.