Synthesis of the microstrip wire grid array

A dual-feed microstrip grid array antenna for balanced or unbalanced operation

“…To lower them, as suggested in Ref. , we adopt the same width w l for all long sides for w l /h < 1 with the characteristic impedance …”

A wideband variable width microstrip grid array antenna

“…As the current through these elements is responsible for the radiation, the widths w a of these lines determine the radiated power from each element. As suggested in [9] these widths can be taken as a first approximation for the weights of the antenna elements in the array. In [10], the normalized currents, which are inversely proportional to the characteristic impedance of the radiating line, and hence approximately inversely proportional to the line width, are used as the antenna element weights.…”

Design and analysis of integrated array antennas for millimeter-wave applications

“…The synthesis of MS GAAs has been attempted [59], [62], [69]; however, no direct synthesis method or design procedure has been developed. In this section, we describe the synthesis and outline the design steps required to implement a MS GAA.…”

“…Palmer's GAA[69]. Chen's GAA: (a) microstrip GAA with a rear-space structure[70] and (b) genetic algorithm optimized microstrip GAA[71].…”

“…The initial length of the grid long side l is twice as long as s. The widths of the grid short and long side w s and w l are governed by impedance, transmission and radiation properties[69].For easy fabrication in large quantities, they are kept the same width with an initial value of 0.12 mm.Fig. 4.10 shows the simulated |S 11 | and peak realized gain as a function of frequency from 50 to 70 GHz with a varying length s and a fixed width w s = 0.12 mm.…”