Rectangular microstrip patch antenna with EBG structure

SIW-fed microstrip patch antenna array for circular polarization

“…However, their performance is limited by narrow impedance bandwidth, low efficiency, and poor polarization purity. Many works, such as stacking the patches [1], using metamaterial [2], loading by electromagnetic band gap (EBG) [3], and many other techniques, have been done to resolve some of these limitations.…”

Grating Lobes Suppression in Frequency Selective Surfaces Using Electromagnetic Band Gap with Square Holes

“…substrates with non-cylindrical holes are reported [13], [14]. Thus, it is important to advance in the study of spurious suppression in planar structures, researching the application of EBG in FSS, aiming at the reduction or suppression of grating lobes.…”

“…The main motivation to construct the dielectric with square holes is that the fabrication process using 3D printer is accurate enough and low-cost, and the computational effort of the simulation is lower when compared with EBG with cylindrical holes. A good starting point for the dimensions of the EBG with cylindrical holes, pitch, and diameter, is provided in [14], which is Λ = 0.12 and d = 0.1, where  is the wavelength of the grating lobe 512 frequency to be suppressed. For the case of square holes, the area of the hole must be equal to the area of the cylindrical hole, maintaining the areas of the holes of the EBG array and, consequently, the desired rejection band.…”