Novel reconfigurable monopole‐based matching circuitry design for 5G and modern wireless communication systems

Abstract

SummaryIn this paper, a design of a reconfigurable printed antenna circuitry for 5G portable devices is proposed based on a miniaturized structure. Thus, the proposed antenna is structured as a printed circuit monopole with a coplanar waveguide port (CWP). The ground proposed CWP is designed as an L‐shaped reflector in order to increase the directivity of the proposed antenna toward a certain direction. A matching circuitry based on a fractal Minkowski structure of the first order is inductively attached to the antenna design to increase the antenna bandwidth. To control the antenna performance, the matching circuit is connected to the L‐shaped reflector through four PIN diodes. The effects of different switching scenarios on the antenna performance are tested numerically and experimentally for validation. It is found that when all diodes are switched ON, such antenna shows two frequency bands, S11 < −10 dB, from 3.5 to 3.7 GHz and from 5.08 to 6.9 GHz. Nevertheless, the antenna gain is found to be about 3.47 dBi at 3.6 GHz and 3.69 dBi around 5.1 GHz. The other switching scenarios are tested and presented in this work. It is observed that the PIN diodes' switching affects significantly on the antenna directivity and the radiation patterns. The antenna performance is parametrically analyzed using CST MWS based on a numerical technique and based on an analytical circuit model. The proposed antenna is fabricated and tested to be compared against the theoretical results. An excellent agreement was obtained between the simulated and measured results.