Design of 1Ã\x972, 1Ã\x974, and 2Ã\x972 Dual Polarization Microstrip Array Antenna

This paper present 3 design of array antenna from type of inset-fed microstrip patch antenna oriented at 45deg and -45deg. The antenna is capable to generate dual-polarization radiation pattern slanted at 45deg and -45deg. Combinations of two and more patches using quarter-wave impedance matching technique have been used to design the array antenna operate at 2.4 GHz. The design were simulated using Microwave Office 2006 and were fabricated on FR4 substrate with a dielectric constant epsiv_r = 4.7, tan sigma = 0.019 and thickness = 1.6 mm. The simulation and measurement result have been compared. The 3 design 1times2, 1times4 and 2times2 array antenna yields a bandwidth of 5%, return loss <-10 dB, HPBW for single element found at 90.07deg-89.75deg and HPBW for array antenna found at 84.68deg-79.05deg. Simulations and measurements were shown that the array antennas gave better results in term of VSWR, return loss and antenna gain compared to the single patch. The higher number of patches in an array will improve the performance of the antenna.