Design of the Gradually Defect Patch Fractal Array Antenna for Unmanned Aerial Vehicle

Abstract

This paper creatively proposes a new fractal iterative structure of a gradual defect patch and combines it with a rectangular array structure. Aiming at the performance requirements of the UAV system for multi-band compatible antennas, a gradual defect patch fractal array is designed. The radiation performance of the fractal array antenna was simulated by the method of moments, and antenna samples were made and the radiation performance was tested. Both simulation and actual measurement results show that this antenna has a working bandwidth of 5.5 GHz or more, a minimum return loss as low as -44 dB and excellent omnidirectional radiation capability. This antenna is compatible with the GPS system frequency band, Beidou system frequency band, all working frequency bands of the second to fifth generation mobile communication systems and the three working frequency bands of the RFID system, and is expected to be widely used as an unmanned aerial vehicle system antenna.

A Gain Embedded V-Integrated Rectangular Slotted Triangular Edged (EVI-STE) Design for Wireless 5G Mobile Applications

“…2√𝑍 𝑐 (7) Where, 𝑍 𝑐 is the characteristics impedance, 𝑉 1 defines the voltage at feeder point terminal, and 𝐼 1 represents the current flow feeder terminal at terminal. Based on the port of S11, the return loss of the antenna can be determined, which indicates the amount of power reflected from the antenna.…”

“…In the existing works, many techniques could be developed to design a patch antenna [3][4][5] based on the measures of reactive loading, optimized shape, and substrate with dielectric constant. Moreover, the micro-strip antenna [6][7][8] is considered as one of the most suitable designing approach due to the characteristics of low cost, reduced weight, and small size. The fractal geometry [9] could be widely used to increase the electrical length and reduce the patch area of antenna.…”