1. Good radiation efficiency. Most FR4-based patches have very high efficiency because FR4 is very lossy at 5.8 GHz.<br> 2. Also, most array antennas have higher losses in the feed network. This design uses a coupled patch to keep the feed network simple and reduce these losses.<br> 3. Very good axial ratio, not only directly perpendicular to the patch but also off-center.<br> 4. High gain, but not higher than the theoretical gain for an array with 7 elements. This is because maximizing the gain results in high side lobes and poor axial ratio.<br> 5. Very low side lobes, with almost all the energy concentrated in the main lobe. This increases the width of the main lobe, but adds some gain.<br> Center frequency:5.8 GHz<br> Bandwidth:660 MHz (5.47 - 6.13 GHz)<br> Matching: S11 Less than - 20 dB, VSWR Less than 1.22 (at center frequency)<br> Axial ratio: Less than 1.3<br> dBi antenna gain: 9.4<br> Half-power beamwidth: 55° (lateral and longitudinal)<br> Radiation efficiency: 83.5%<br> These values are based on simulations, actual measured values are below (they are very similar).<br> Due to the variation in dielectric constant of FR4, the center frequency may shift between batches.<br> Also, not all FR4 brands have the same dielectric constant.<br> It is normal for the frequency to shift to 100 MHz.<br> Due to different batches, there may be differences in product appearance and printed text, which will not affect use.<br> Specification:SMA/RP-SMA<br> Colour:Blue<br> Material:Plastic+Metal<br> Package Contents:<br> 1 x Triple Feed Patch Array Antenna<br> 1 x Adapter Cable<br> Only the above package content, other products are not included.<br> 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.