The Shengyi S7349, known as mmWave77, is a high-frequency, low-loss material designed for a variety of RF and microwave applications. It offers excellent electrical and mechanical properties, including a stable dielectric constant (Dk) of 3.0 ± 0.04 and a low dissipation factor (Df) of 0.0010 at 10 GHz. These properties are maintained across a broad frequency range from 1 GHz to 100 GHz and a wide temperature range from -55℃ to +150℃. This makes mmWave77 an ideal choice for applications requiring consistent performance under varying environmental conditions.

When building a PCB stackup using mmWave77, it is crucial to consider its excellent dimensional stability, chemical resistance, low moisture absorption, and strong copper peel strength. These features ensure the reliability and durability of the PCB in demanding conditions. The material is available in both core and pre-preg forms, allowing for flexible design options in multilayer PCB constructions. Here are some key considerations for using mmWave77 in your PCB design:

• Ensure that the PCB design accommodates the Dk value of 3.0 ± 0.04 to achieve accurate impedance control.
• Take advantage of the material's low moisture absorption and excellent copper peel strength for applications exposed to harsh environments.
• Utilize the stable Dk and Df over a wide frequency and temperature range for applications like automotive radar, cellular telecommunications, and GPS systems.

Applications of mmWave77 are broad, including automotive radar systems, cellular telecommunications, GPS satellite antennas, and wireless communication systems. Its properties are particularly beneficial for high-frequency applications where minimal signal loss and high reliability are critical. The material's compliance with UL 94 V-0 flame rating also adds an extra layer of safety for end-use applications.