International Journal of Antennas and Propagation / 2014 / Article / Fig 22

Research Article

Radiation-Enhancement Properties of an X-Band Woodpile EBG and Its Application to a Planar Antenna

Figure 22

Return loss of the woodpile-covered patch antenna resonating at 13.3 GHz and of the patch alone, versus frequency; the distance between patch and woodpile is  mm.