Characteristics of a two-layer electromagnetically coupled rectangular patch antenna
Experimental results on the characteristics of a two-layer electromagnetically coupled rectangular patch antenna are presented. The variations of pattern shape, 3 dB beam width, and impedance bandwidth with spacing s between the two layers are studied for s between 0 and 0.37 lambda (0). A relatively high-gain region is found for s between 0.31 lambda (0) and 0.37 lambda (0).
Lee, R. Q.↗