Ready to create beautiful halo rings that sparkle with elegance? This DIY tutorial guides you through making your own halo rings using gold-plated wire and Swarovski crystals. These rings are not only ...

In this work, a stacked ring spiral antenna has been proposed, the metallic ring is stacked behind the spiral antenna with the help of FR-4 substrate (dielectric constant=4.3 and loss tangent 0.025), ...