Antenna array based on open ring radiators

Relevance. The creation of antenna arrays for communication systems is an urgent task in the unmanned aviation industries, in particular, for video signal transmission systems. Also, the relevance of the work is due to the need to use directional or single-beam antennas for direction finding and radar systems. The purpose of the work. Theoretical and experimental verification of the possibility of using both single patch antennas and antenna arrays based on them for video signal transmission systems in the 5.8 GHz band. Optimization of the geometrical parameters of the radiator, at which the gain will be maximum. Solution of the problem of microwave power division for powering the antenna array elements. Materials and methods. The paper presents theoretical results of modeling the frequency and spatial-energy characteristics of a single radiator and a series of antenna arrays based on it. A comparative analysis of experimental and theoretical studies of the matching characteristics for a single radiator is carried out. Modeling and optimization of antenna parameters was carried out using the Ansoft HFSS commercial package. Results. A patch antenna in the form of an open ring was investigated. A series of designs of antenna arrays with linear and circular polarization of 5.8 GHz has been obtained for use in video signal transmission systems, for example, to implement the first-person view (FPV) control mode for unmanned vehicles. A power divider based on quarter-wave transformers is used to power the antenna array. It is shown that the gain of a single patch antenna can exceed 10 dB. An antenna array of 4 elements located in the nodes of a rectangular grid can have a gain of more than 16 dB. Conclusion. The proposed type of antennas is adapted for communication systems, in particular, video signal transmission at 5.8 GHz. Along with satisfactory spatial and energy characteristics, the proposed technical solutions are simple and suitable for mass production.