Abstract
a reconfigurable antenna design for 5G applications is presented. It is based on monopole antenna and fractal structure. The design structure is consisted of (monopole) feedline, ground plane, L-shape reflector, fractal structure and PIN diodes. The antenna is printed on (25×29×1.6 mm3) FR-4 substrate of εr=4.3 and tanδ =0.001. The antenna shows a resonant frequency at 4.1 GHz with S11=-11.4 dB and Omni-direction pattern of 1.21 dB gain. The L-shaped reflector is used to maintain the radiation pattern in a specific direction. Moreover, the proposed fractal structure is found to operate as a circuit to give another resonant frequency and enhance the antenna performance. Where it is used to give more manipulation in the antenna performance including: frequency resonance and radiation patterns. The PIN-diodes are used to give many cases for more current manipulation. moreover, the authors used RF (50 SMA port) between monopole antenna and right side of ground plane to optimize directing radiation pattern and to eliminate the problems of interference between AC and DC current that produced from using PIN diode. This manipulation leads to change the resonant frequency and radiation pattern to the desired direction.So all parts are printed on a single side of FR4 substrate
Highlights
In wireless communication systems, many applications operate at frequencies below 6 GHz to ensure high speed guided transmission [1]
Fractal based antenna was proposed to improve the efficiency of a partial ground plane antenna when two diodes were connected to the fractal structure [16]. the authors in [17] proposed design of Double H-Slot Microstrip patch that operate on three frequencies to enhancement gain and to change radiation pattern in many directional
The authors give a systematic study of a reconfigurable printed antenna design based on fractal structure for 5G applications
Summary
Many applications operate at frequencies below 6 GHz to ensure high speed guided transmission [1]. Dipoles/monopoles, slot/horn antennas, loop antennas, microstrip antennas, reflector antennas, helical antennas, dielectric/lens antennas, log-periodic antennas, and frequency-independent antennas are different types of antennas that have emerged in the last fifty years for both radar and communication systems, each of which is better suited to a specific application than the others [3] Because of their low cost, lightweight, and ease of fabrication [4], printed antennas are the most suitable ones commonly used in reconfigurable designs [5]. The authors in [17] proposed design of Double H-Slot Microstrip patch that operate on three frequencies to enhancement gain and to change radiation pattern in many directional. The HFSS software package is invoked too for more result accuracy
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