The Kappa 438 Laminates from Rogers have been specifically formulated to have FR-4 matched dielectric constant (Dk). These laminates also exhibit low loss, tight Dk and thickness tolerances needed to meet the growing performance needs of the wireless market traditionally served by higher end FR-4 materials. FR-4 was historically the material of choice for most less demanding RF applications, but changes in the wireless infrastructure related to growing performance requirements, especially in small cells and carrier-grade Wi-Fi, has resulted in instances where the properties of FR-4 are lacking, and RF performance and consistency is compromised.
Kappa 438 has been developed to fill this need. The laminates feature the performance of mid-tier circuit materials that extend beyond performance limitations of FR-4, and provide the optimum blend of price, performance and reliability.
