Technological advancements in 5G antenna RF materials, including substrate selection for PCB circuit boards across various frequency bands, recommend materials like RO4350B/RO4835, RO3003, and RO4730G3. Differences between RO4450T™ and RO4450B™ lie in thickness options and minor formulaic upgrades. TCDk restricted materials, addressing temperature coefficient of dielectric constant, are vital for product performance under extreme conditions, favoring materials like RA, RQ, or RZ for microstrip line bandpass filters. For ultra-high frequencies like 100GHz and above, suitable PCB materials include RO3003, DiClad880, and RT/duroid5880, valued for their low loss properties.