Abstract
A compact circularly polarized microstrip patch antenna was designed and fabricated based on the virtual load and limited airframe size of Unmanned Aerial Vehicles (UAV) applications. This antenna is used for ISM frequency band and to enhance the integration of sensors and circuits in UAV communication system. The paper presented the simulation and the measured results. This antenna Experimental results show the 3dB axial ratio bandwidth is 0.6%, the half power beamwidth is ±45º, and the gain is 4.5dBi. The antenna size reduction can be as large as 36%, as compared to that of the conventional CP design.
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