A Dual-Broadband Circularly Polarized Halved Falcate-Shape Printed Monopole Antenna
A halved falcate-shape dual-broadband circularly polarized printed monopole antenna is proposed. To generate the equal amplitude orthogonal modes, two halved falcate-shaped antenna are used. Also, to provide the 90 degrees phase difference between the two modes, three stubs are used in the ground plane of the antenna. The proposed antenna provides 22.6 (1.36-1.72 GHz) and 44.4% (5.25-8.25 GHz) 3 dB axial ratio bandwidth over the lower and upper bands, respectively. By adjusting the parameters of the antenna, the lower and upper band center frequencies can be tuned individually. The proposed antenna is fabricated, and results are compared with those of the simulation. (C) 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE 21:636-641, 2011.
falcate-shape printed monopole antenna axial ratio circular polarization