Antenna Arrays with Radiating Element a Symmetrical Dipole

Abstract

In the present paper, the analysis of phased antenna arrays made in microstrip technology that can be arranged on an aircraft/UAV is proposed. The antenna arrays will have as a radiating element a symmetrical dipole, the dimensions of the analyzed antenna arrays will be 2x2 and 4x4, with a working band of [4–6] GHz, a gain that increases directly proportional to the number of elements reaching the maximum value of about 12 dB, the input impedance of the antenna arrays of 50Ω and to obtain a good match the VSWR - Voltage Standing Wave Ratio is considered to be less than 2. The design algorithm of the radiating element will be described, the parameters that will be analyzed: the reflective coefficient, the gain and the opening angle of the antenna arrays. Also, 2x2 and 4x4 antenna array structures will be analyzed. It is desired to highlight the advantages of an antenna array, such as the increase in gain directly proportional to the number of elements, the selectivity of the opening angle of the directivity characteristic. These advantages are paramount in the field of aircraft radars because the structure of the antenna arrays is desired to be as simple and light as possible with better performance and selectivity. With the help of this type of symmetric antenna arrays structure, the monopulse tracking system, a system often found in radars on multirole aircraft, can be implemented. The design and analysis of structures made using microstrip technology will be developed within the Ansys Ansoft-HFSS V15.0 design and simulation program.