Wideband printed antenna with circular polarization

The paper presents a novel method of feeding of the single-feed printed antenna with circular polarization consisting of two orthogonal dipoles whose impedances are complexly conjugated thus obtaining quadrature feeding currents. A feeding line-balanced microstrip is placed perpendicularly to the antenna plate so that the parasitic coupling of the orthogonal dipoles and the feeding line is totally eliminated. In this manner, wider band is obtained. The VSWR is less than 2 in the frequency range of 26%, axial ratio AR<6 dB in the range of 13% and AR<3 dB in the range of 6%. The antenna is realized in the frequency range of about 5 GHz.