In 2026, high-frequency applications—5G/6G base stations, mmWave radar for autonomous vehicles, satellite communications, aerospace systems, and IoT edge devices—are pushing PCBs beyond 10 GHz and into mmWave bands (24–100 GHz). Standard FR4-based generic PCB suppliers handle low-to-mid frequency boards well, but they often fall short when signal loss, dielectric stability, impedance precision, and thermal performance become critical. That's where a specialized high frequency