High Gain and Low Cross-polar Compact Printed Elliptical Monopole Uwb Antenna Loaded with Partial Ground and Parasitic Patches

In this paper a low cost, high gain, low cross-polar and compact edge feed printed elliptical antenna with a partial ground plane and parasitic patches is proposed and investigated. The proposed antenna is fabricated on a 1.6mm thick FR4 substrate with dielectric constant of 4.4 and loss tangent of 0.025. The total planar area of the proposed antenna (L × W ) is 28 × 24mm2. Both the simulated and experimental result shows that the proposed antenna provides a frequency range compatible with the ultra-wideband (UWB) standard, i.e., 3.5 GHz–12GHz frequency band. The radiation pattern produced by the proposed antenna is approximately omnidirectional with inphase excitation of Surface waves resulting in less cross-polarization level (less than 20 dB) compared to its co-polar component for the entire impedance band width. The maximum measured gain for the fabricated antenna is around 6.27 dBi with an average efficiency of above 90% throughout the bandwidth. A linear phase response (phase of S21) accompanied by a constant group delay of 1 ns throughout the measured bandwidth makes the proposed antenna a good candidate for UWB applications.