Design of array microstrip antenna with circular polarization for Broadband Tracking System Application

This paper proposes the design and simulation of microstrip array antennas with 4x1 elements that have circular polarization for Broadband Antenna Tracking System (BATS) applications. The proposed antenna is designed to work at a frequency of 11 GHz by using FR-4 type substrate with a dielectric constant 4.3, thickness (h) 1.6 mm and loss tangent (tan α) 0.0265. Circular polarization with axial ratio ≤ 3 dB was obtained using the truncated corner technique while the 4x1 element array technique was used to increase the bandwidth of the proposed antenna. From the simulation results obtained return loss of -29.71 dB and VSWR 1.068 at the working frequency of 11 GHz. The bandwidth of the proposed antenna is 1663 MHz in the frequency range 10582 GHz - 12215 MHz. The axial ratio of the proposed antenna is ≤ 3 dB, which is 2.462 dB at the working frequency of 11 GHz. Based on the results obtained from the design and simulation process, the proposed antenna has worked in accordance with the specified working frequency and is suitable for the Broadband Tracking System application.