Promising review: "Great solar light. Using several as up-lighting for trees in my yard, and they are great. Sturdy structure ...

The antenna has a size of $40 \times 41 \times 1.6$ mm 3, printed on FR-4 dielectric material with height (h) of 1.6 mm, loss tangent () of 0.02 and dielectric constant () of 4.4. Antenna parameters ...