Stacked microstrip antenna for wideband and high gain

Enhancement of Gain of Rectangular Micro Strip Antenna Using Multilayer Multidielectric Structure

“…In a resonance gain method [8][9][10], layers of dielectric are stacked above the patch. For a three-layer electromagnetically (EM) coupled structure, an air layer is often used between a substrate and a superstrate [11,12]. The patch is etched on top surface of a grounded substrate, and a coupled patch is on top [11] or bottom [12] surface of the superstrate.…”

“…For a three-layer electromagnetically (EM) coupled structure, an air layer is often used between a substrate and a superstrate [11,12]. The patch is etched on top surface of a grounded substrate, and a coupled patch is on top [11] or bottom [12] surface of the superstrate. It was reported that gain of the patch antenna can be increased by tuning thickness of the air layer.…”

“…It was reported that gain of the patch antenna can be increased by tuning thickness of the air layer. In [11], the spacing is between 0:31¸ and 0.37¸ In [12], the spacing is approximately one half free space wavelengths. Gain enhancement is demonstrated only for linearly polarized antenna.…”

SRR Superstrate for Gain and Bandwidth Enhancement of Microstrip Patch Antenna Array

“…However, most of the research is limited to the upliftment of either gain or bandwidth of a single element patch antenna, and comparatively less attention has been paid towards simultaneously increment of their gain and bandwidth [8][9][10][11]. Moreover, as per the best knowledge of the authors, the techniques followed by these researchers are limited to single patch element, and no attention has been paid to incorporating these techniques for performance improvement of patch antenna arrays.…”

Enhance Gain and Bandwidth of Circularly Polarized Microstrip Patch Antenna Using Gap-Coupled Method

“…Some of them resort to the material side by using thicker or bilayered substrate [1,2] or reducing the dielectric constant [3]. Some of them solve the problem from the structure side by using array technique [4] or by using gap-coupled method [5][6][7][8][9][10]. In principle, the two strategies should also work well for a circularly polarized microstrip patch antenna.…”