A Novel Printed Monopole Antenna for Broadband Applications

In this paper, one novel leaf shaped printed antenna is reported which is excited with a Coplanar Waveguide (CPW) feed. The proposed antenna geometry is designed by incorporating two basic patch geometries 'semicircle' and 'triangle' which minimize the physical area of the radiator in comparison to the other regular geometries. The antenna operates over the C-band with 70% impedance bandwidth (S-11< -10 dB) and about 4 dBi peak gain. Further, the sleeve like structure has been incorporated in the same antenna and the impedance bandwidth has been extended about 20%. Now this leaf shaped patch antenna with sleeve-like structure operates over C and X bands with about 4.5 dBi peak gain. The antenna also provides monopole-like radiation pattern and low cross polarized components in two principal planes. So, the proposed antenna can be used as a suitable electromagnetic radiator for C and X bands applications.