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In high-frequency and high-speed electronic design, the choice of PCB substrate plays a decisive role in signal integrity, transmission efficiency, and long-term reliability. As a global leader in high-frequency circuit materials, Rogers Corporation has developed a wide range of RF PCB laminates renowned for their exceptional dielectric performance, ultra-low transmission loss, and outstanding thermal stability. These materials are widely used in microwave and RF circuits, millimeter-wave communications, advanced industrial electronics, and intelligent automotive systems, making them one of the most important substrate materials for high-end high-frequency PCB design.
Compared with conventional FR-4 laminates, high-frequency Rogers materials offer overwhelming advantages in high-frequency signal stability, thermal resistance, dimensional stability, and electrical consistency, making them the preferred choice for demanding RF and microwave applications.
Key Electrical Properties
In RF and microwave circuit design, dielectric constant (Dk) and dissipation factor (Df) are the two most critical parameters governing signal transmission performance.
The dielectric constant (Dk) measures a substrate's ability to store electrical energy and directly influences both signal propagation speed and circuit miniaturization. Materials with lower Dk values provide faster signal propagation and lower transmission delay, making them ideal for high-speed, high-frequency applications. Conversely, higher Dk materials shorten the signal wavelength at a given operating frequency, allowing more compact circuit layouts and smaller devices. However, excessively high Dk values require narrower transmission lines and may increase conductor loss, so selecting an appropriate dielectric constant is essential. Besides the nominal Dk value, designers should also pay close attention to dielectric constant tolerance. For standard RF applications, a tolerance of ±0.04 or better is recommended, while highly precise microwave systems generally require ±0.02 or better.
The dissipation factor (Df) quantifies dielectric energy loss at high frequencies. Lower Df values correspond to lower insertion loss, better signal integrity, and higher transmission efficiency. Conventional FR-4 typically exhibits a Df between 0.015 and 0.020, with losses increasing rapidly around 10 GHz, making it unsuitable for RF and microwave applications. Rogers materials generally achieve Df values between 0.002 and 0.004. Materials with Df below 0.002 are suitable for high-performance microwave and lower millimeter-wave applications (10–40 GHz), while Df below 0.001 is preferred for medium- and high-frequency millimeter-wave systems operating between 40 and 110 GHz.
Different Rogers product families are carefully optimized for specific application requirements. For example, RO3003 provides a dielectric constant of 3.00 and an exceptionally low Df of 0.0010 at 10 GHz, making it particularly suitable for high-precision applications such as 77 GHz automotive radar. RO4350B, with Dk = 3.48 and Df = 0.0037 at 10 GHz, offers an excellent balance between electrical stability and thermal conductivity, making it one of the most widely adopted materials for 5G base station power amplifiers. RO4835 maintains excellent electrical performance while offering oxidation resistance approximately ten times greater than conventional thermoset laminates, making it highly suitable for long-term, high-power RF and microwave systems.
Major High-Frequency Rogers Material Families
RO4000 Series
The RO4000 Series consists of ceramic-filled thermoset laminates designed specifically for precision RF and microwave circuit fabrication, supporting operating frequencies extending into the millimeter-wave range. Unlike PTFE-based materials, the RO4000 Series does not require specialized PTFE processing techniques, offering excellent manufacturability alongside stable electrical performance and cost efficiency.
RO4003C is the general-purpose material of the series, widely used in wireless communications, aerospace, defense electronics, and precision instrumentation. At 10 GHz, it provides Dk = 3.38, Df = 0.0027, and a Z-axis coefficient of thermal expansion (CTE) of 46 ppm/°C, making it suitable for a broad range of RF applications.
RO4350B is designed for applications requiring superior dimensional stability and thermal performance. Its dielectric constant is tightly controlled at 3.48 ± 0.05 (10 GHz), while its thermal conductivity and high-temperature reliability are significantly improved. At 10 GHz, it offers Df = 0.0037 and a low Z-axis CTE of 32 ppm/°C, minimizing deformation under elevated temperatures. Together with RO4003C, RO4350B has become one of the industry's most widely used materials for Sub-6 GHz applications.
RO4360G2 features a relatively high dielectric constant of 6.15 at 10 GHz, enabling shorter wavelengths and more compact circuit designs while maintaining excellent thermal conductivity.
RO4500 is optimized for manufacturing compatibility, supporting conventional FR-4 fabrication processes, lead-free soldering, and plated through-hole processing without requiring special manufacturing techniques.
RO4835 offers a lightweight solution with electrical characteristics comparable to other RO4000 materials while providing superior oxidation resistance and long-term aging performance.
RO3000 Series
Compared with the RO4000 family, the RO3000 Series focuses on reducing manufacturing costs while maintaining excellent high-frequency performance. All materials in this family utilize ceramic-filled PTFE composites, providing stable dielectric properties and well-controlled transmission loss.
A defining characteristic of the RO3000 Series is its extremely low dielectric constant and very low loss, making it particularly suitable for applications where transmission loss and dielectric stability are critical. Representative products include RO3003, featuring Dk = 3.00 and Df = 0.0010, RO3006, which combines high dielectric constant with excellent thermal conductivity, and RO3010, a versatile microwave-grade material suitable for automotive radar, power modules, and general microwave circuitry.
RT/duroid Series
The RT/duroid Series consists of environmentally friendly, halogen-free high-frequency laminates with extremely precise electrical characteristics. Among them, RT/duroid 5880 offers a dielectric constant of 2.20 ± 0.02 and an exceptionally low dissipation factor of only 0.0009, making it ideal for high-power-density millimeter-wave applications. It is widely used in applications ranging from LEO satellite antennas to 5G millimeter-wave networks.
TMM Series
The TMM Series comprises thermoset laminates filled with finely dispersed ceramic particles. Available in multiple dielectric constant grades—including TMM3, TMM4, TMM6, and TMM10i—this family supports broadband and multi-band RF designs across a wide range of applications.
Overall, the greatest advantage of Rogers laminates extends beyond their excellent electrical properties. Their coefficients of thermal expansion closely match those of copper foil, effectively overcoming the poor thermal stability and delamination issues commonly associated with conventional PTFE substrates, thereby significantly improving the service life and reliability of high frequency PCBs.
Primary Applications
Thanks to their low transmission loss, excellent stability, wide operating temperature range, and outstanding material consistency, Rogers RF laminates are widely used in numerous high-end applications.
For automotive millimeter-wave radar, RO3003 is the preferred substrate for 77 GHz primary radar, where its ultra-low insertion loss and highly stable dielectric properties ensure exceptional detection accuracy and reliability. RO4835 is commonly used for 24 GHz auxiliary radar, benefiting from oxidation resistance approximately ten times greater than conventional materials to withstand demanding automotive environments. By 2025, the installation rate of ADAS systems in China's passenger vehicles has exceeded 61%, with high-frequency PCB consumption per vehicle increasing approximately fourfold compared with conventional automobiles.
In 5G millimeter-wave communications, Rogers materials support high-bandwidth RF transmission for concealed automotive antennas, GNSS navigation antennas, V2X communication antennas, and base station RF units. As antenna ports per 5G base station have increased from the traditional 4–8 ports to 64–128 ports, market demand for Rogers high-frequency laminates has expanded by an estimated four to six times.
In microwave and millimeter-wave industrial equipment, the RO4000 Series offers superior manufacturability compared with traditional PTFE materials while delivering excellent high-frequency performance, making it widely adopted in microwave circuits and RF test equipment.
For advanced automotive electronics, Rogers laminates provide stable substrates for ADAS systems and automotive RF power circuits. Automotive high-frequency PCBs have become one of the fastest-growing market segments, with 77 GHz millimeter-wave radar PCB demand increasing by more than 80% year over year.
In telecommunications and satellite communications, Rogers materials are extensively used in commercial base station antennas, power amplifiers, high-speed digital backplanes, satellite low-noise block (LNB) modules, and other mission-critical communication equipment.
For RFID systems, the RO4000 Series supports high-performance RF tag designs used in intelligent supply chain management, security access control, and industrial identification systems.
In addition, RO4835T ultra-thin high-frequency laminates, available in 2.5 mil, 3 mil, and 4 mil thicknesses, are well suited for multilayer millimeter-wave PCB designs. They fully satisfy the latest requirements of 5G high-frequency and high-speed signal transmission and are also considered an excellent substrate choice for high-speed optical modules.
Major Domestic Alternatives and Market Status
Shengyi Technology is China's leading manufacturer of high-frequency laminates and the world's second-largest producer of rigid copper-clad laminates, with a global market share exceeding 12%. Its SABIC PPO-based high-frequency laminates feature low dielectric constant and low loss characteristics, with flagship products benchmarking Rogers RO4535 and RO4730G3. By 2025, Shengyi's M7 high-frequency material achieved a Df of 0.0025 or lower and was qualified for NVIDIA GB300 AI servers, while annual production capacity for its M9 resin-based materials reached 12 million square meters, supporting 1.6T optical module applications. The company has successfully commercialized multiple high-frequency and high-speed laminate products covering a wide range of dielectric constant and loss specifications.
Huazheng New Material focuses on high-frequency copper-clad laminates and has introduced its HF175 and HF380 product families, which provide low dielectric constant, low loss, and excellent thermal stability for RF communication and high-frequency circuit applications.
Zhongying Technology offers the ZY-7000 and ZY-5500 series, providing a balanced combination of thermal resistance, electrical performance, and mechanical strength.
Taizhou Wangling manufactures the WI-280 and WI-400 high-speed, high-frequency laminates, primarily targeting satellite communication terminals and specialized RF communication equipment.
Other domestic manufacturers, including Taixing Microwave and Gongli Ceramic Board, continue to advance their high-frequency substrate technologies, gradually replacing imported materials through competitive pricing, shorter lead times, and localized technical support.
At present, Chinese high-frequency laminates have achieved comprehensive coverage of mainstream commercial RF applications. However, in demanding fields such as 77 GHz automotive radar, aerospace satellite communications, and ultra-high-precision power amplifiers, domestic materials still lag behind Rogers in parameter accuracy, long-term stability, and manufacturing consistency. Nevertheless, with sustained investment in research and continuous improvements in production technology, the performance gap between domestic and imported high-frequency PCB materials continues to narrow, steadily accelerating the localization of high-end RF substrates.