Abstract-A printed triangular monopole antenna with wideband circular polarization is presented. The wideband circular polarization is achieved by asymmetrical excitation of a triangular ground plane and planar triangular monopole. The combined radiation provides a wide axial-ratio bandwidth spanning from 1.42 to 2.7 GHz (62%). A parametric study of key geometric parameters is given for clear understanding of the radiation mechanism.

Abstract-A simple polarization reconfigurable printed monopole antenna is proposed for wireless applications. Conducting strips are used to connect to the ground plane providing the necessary additional modes for circular-polarization. Linear-polarization, right hand or left hand circular-polarization can be realized using only two PIN diodes, which connect to the ground plane, minimizing their effect on radiation characteristics. The mechanism is described, and key antenna parameters are studied and optimized. The antenna is prototyped and tested for all polarization configurations Index Terms-Monopole antennas, polarization reconfigurable

A printed circularly polarized m operating at 2.45 GHz is presented. It consi shape radiating component fed by a microstrip to a 50 Ω microstrip feed. It is fabricated on with dielectric constant of 4.6. Simulated and are reported and effect of key parameters is de Keywords-circular polarization, monopole ante I.

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