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Μελέτη και προσομοίωση κεραίας τύπου μικροταινίας για υποστήριξη καναλιού επικοινωνίας αέρος – εδάφους για μη επανδρωμένα αεροσκάφη

Stromatias Grigorios

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Summary

The scope of the present thesis is the design and simulation of a patch antenna used for the Air to Ground – AG communication channel of Unmanned Air Vehicles – UAVs. The design and simulation of the performance of patch antennas has evolved through recent years. Advanced simulation environments allow fast and accurate numerical solutions of field equations, offering a variety of methods and techniques. Patch antennas designers take advantage of simulation capabilities, in order to analyze and verify designs before realization and integration to communication systems.Patch antennas constitute an ideal solution for communication when related with limited geometrical dimensions, especially for systems and vehicles that forbid use of moving and expanded mechanical structures. The latter is a primal choice factor for UAVs. Efficient communication characteristics combined with low power consumption levels for required bandwidth, make setups with patch antennas ideal choices for portable systems.Chapter 1 of the present thesis comprises a short historical introduction of patch antennas, as well as general operation characteristics and capabilities. Following the design principles for patch antennas modeling simulation and analysis environments, used for the model development and solution of field equations are presented. Chapter 2 introduces current technical basis of UAVs, focusing on communications and structure requirements. The designed patch antenna is analyzed and simulated using a 3D electromagnetic simulator based on the finite elements method in chapter 3. The outcome simulation results are further evaluated and analyzed in Chapter 4, in order to verify objectives and design requirements for UAVs. Finally, general conclusions through the design process of the patch antenna related to the required communication Air to Ground channel for UAVs are derived, as these have been evaluated for covering current and future communication requirements with earth base stations.

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