1. Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz.Additionally, most array antennas have higher losses in the feed network.This design uses coupled patches to keep the feed network simple and reduce these losses. 2. Exceptionally good axial ratio, not just directly perpendicular to the patch but also off-center. 3. High gain, though not as high as the theoretical gain of an array with .This is because maximizing the gain would result in high sidelobes and a poor axial ratio. 4. Very low sidelobes, almost all energy is concentrated in the main lobe.This increases the width of the main lobe, at the expense of some gain. Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 - 6.13 GHz) Matching: S11 Less than -30 dB, VSWR Less than 1.065 Axial ratio: 1.05(0.38dB) Antenna gain: 14.4 dBi Half power beam width: 30° (horizontal and vertical) Radiation efficiency: 75% Colour:Black Material:plastic+metal Package Contents: 4 x 150mm Triple Feed Patch 5.8GHz 14dBi Pagoda Array FPV Antenna 4 x extension cable 4 x 50ohm dummy load Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.