A Unidirectional Antenna Using Circular Disc Monopole Excited Circular Ring above Cylindrical Reflector

This paper presents the characteristics of a bent probe excited circular ring antenna above cylindrical reflector radiating circular polarization for the point to point wireless Local Area Network communication system. The proposed antenna is operated at the center frequency of 2.45 GHz. The CST software based on FIT (Finite Integral Techniques) is used as the simulation tool for investigating the antenna characteristics. The probe was shielded by dielectric rod and it is bent to obtain good impedance matching and circular polarization. The simulated results of the return loss, radiation pattern, and axial ratio are presented. The antenna has an impedance bandwidth (2:1 VSWR) of 24.93% that cover the frequency range of 2.089 -2.684 GHz. The antenna has a unidirectional pattern with maximum gain of 8.88 dBi. The average gain level is 8.18 dBi from simulation. The front-toback ratio in both E-plane and H-plane is better than 20 dB.

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“…To realize the unidirectional pattern with linear polarization, the reflector should be placed near one side of the ring aperture [8]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…Table 1 shows the initial of parameters used in this paper. These parameters were initiated by following the design in literature [8]- [9]. According to the design parameters, this antenna is designed to operate at frequency of 2.45 GHz.…”

Section: Introductionmentioning

confidence: 99%