“…The radiator patch dimensions thickness (h), width (W P ), and length (Lp) determine the bandwidth, resonant frequency, and efficiency of the microstrip antenna [ 71 ]. The polarization, frequency band number, antenna gain, and bandwidth are all determined by the shape of the radiator patch (rectangular [ 72 , 73 , 74 ], circular [ 75 , 76 ], square [ 77 , 78 ], and others [ 79 , 80 , 81 ]), as well as the feeding technique (position, type, and number of feeds). Plans of various types of techniques for the bandwidth improvement of microstrip topologies have been made: (I) patch modifications generating complex designs to mix various resonant frequency bands [ 73 , 75 ], (II) the addition of radiator patch slots [ 72 , 75 , 79 ], (III) the insertion to the radiator patch layer of parasitic components [ 72 , 79 ], and (IV) adjustments in the feeding technologies [ 72 , 82 , 83 ].…”