The R-5515 from Panasonic is a Halogen-free Ultra-low Transmission Loss Dielectric Material that is used to provide insulation in a PCB. It is based on Panasonic's proprietary thermosetting resin design technology and exhibits excellent dielectric properties. The dielectric material has good adhesion strength with low-profile copper foils. It has a dielectric constant (Dk) of 3 and a dissipation factor of 0.002. The dielectric material enables multi-layer antenna constructions and improves the design flexibility of high-frequency circuit boards. It improves the efficiency of millimeter-wave band antenna signals by reducing signal losses. The dielectric material can be processed using existing standard circuit board manufacturing equipment and requires no special chemical solutions or processes. It is ideal for mm-Wave radar, wireless base station antenna, and automotive applications.