“…(2) Approximate analytical treatments of microstrip antennas: [1,3,4,5,10,11,17,22,24,28,29,31,34,47,48,49,50,56,62,63,64,69,73,74]. (3) Numerical analysis of microstrip elements: [35,36,37,38,39,40,41,42,43,44,45,46,58,67,71]. (4) Rectangular microstrip elements: [1,3,4,5,9,10,11,19,22,28,30,31,33,34,…”