Improvement of a Circular Microstrip Antenna Excited by Four Feeds and Suspended with Artificial Magnetic Conductors
Figure 3
The reflection phase characteristics of the AMC structure with a square patch in a unit cell with different thickness of dielectric substrate, where mm and the values of are 27.38 mm, 25.6 mm, 21.25 mm, and 17.15 mm, for of 0.8 mm, 1.5 mm, 3.0 mm, and 4.5 mm, respectively.
