Core Application Fields

• Aerospace & Defense: Airborne and ground-based radar systems, missile guidance platforms, satellite transceivers, space-borne electronic systems
• Communications Infrastructure: 5G/6G base stations, RF power amplifiers, antenna arrays, millimeter-wave communication equipment, RFID systems
• Automotive Electronics: Advanced Driver Assistance Systems (ADAS), in-vehicle millimeter-wave radar, vehicle-to-everything (V2X) communication modules
• Industrial & Medical: High-precision test and measurement instruments, medical imaging equipment, industrial RF sensing systems
• Consumer Electronics: High-end wireless devices, satellite communication terminals, millimeter-wave sensing products

Core Performance Specifications & Design Principles

1. Dielectric Constant (Dk) Control

   The Dk value of high-frequency substrates must be low, highly stable, and consistent across operating frequencies and temperature fluctuations. Electrical signal propagation speed is inversely proportional to the square root of the substrate's effective Dk: an excessively high Dk directly causes signal transmission delay, increased insertion loss and signal distortion. For most high-frequency RF applications, a low and stable Dk is preferred. For special scenarios such as antenna miniaturization and high-density coupling circuits, we also provide customized high-Dk substrate solutions, with commercial Dk values ranging from 2.0 to 16.0, and support for custom solutions with Dk exceeding 25. Beyond nominal Dk values, batch-to-batch and intra-sheet consistency of Dk parameters is a core metric for high-frequency PCB quality, which we strictly control within ±0.05 for mass production.
2. Dielectric Loss Tangent (Df) Control

   Df is the core parameter that directly determines high-frequency signal transmission quality, characterizing the energy loss of electromagnetic waves propagating through the substrate. The lower the Df value, the smaller the signal attenuation during transmission, which is critical to preserving the integrity of high-frequency, high-speed signals, especially in millimeter-wave band applications. We select high-performance low-loss high-frequency substrates, and optimize manufacturing processes to minimize additional processing-induced loss, ensuring full realization of designed electrical performance.
3. Precision Characteristic Impedance Control

   Characteristic impedance is a comprehensive parameter combining the resistance and reactance of a transmission line, and precision impedance control is the cornerstone of high-frequency and high-speed circuit design. The core requirement of RF circuit design is to keep the actual impedance of the PCB transmission line strictly consistent with the designed target impedance (most commonly 50Ω for single-ended RF systems, 100Ω for differential pairs), to achieve optimal impedance matching between the signal source, transmission line and load end. Effective impedance matching minimizes signal reflection, reduces return loss, and ensures maximum power transmission. We implement full-process closed-loop control, with mass production impedance control tolerance as low as ±5%, and prototype capability up to ±3%, strictly controlling impedance deviation within customer-specified ranges.
4. Low Water Absorption & Environmental Stability

   High-frequency substrates require ultra-low water absorption. Excessive moisture uptake causes irreversible shifts in the substrate's Dk and Df values in high-humidity operating environments, resulting in unstable signal transmission, increased insertion loss, and degraded circuit performance — a critical risk for long-term reliable operation of outdoor, aerospace and automotive electronic systems. All our high-frequency PCB substrates are selected for low water absorption characteristics, with optimized lamination and surface treatment processes to ensure long-term environmental stability of finished products.

Manufacturing Process Advantages

• Precision Etching Control System: Adopt laser direct imaging (LDI) technology and optimized etching processes, achieving ±0.02mm ultra-high precision dimensional control for RF circuits, with minimum fabricated line width/line spacing down to 3/3mil. We implement refined closed-loop control of the entire etching process, effectively eliminating etching burrs and undercutting, ensuring consistency of fine line geometry, and fully restoring the designer's original design intent.
• Dedicated Lamination Process: Optimized lamination parameters for different high-frequency substrates, solving CTE mismatch issues between heterogeneous materials, ensuring interlayer bonding reliability, and controlling board warpage to meet high-precision SMT assembly requirements.
• Full-Process Electrical Performance Verification: Equipped with professional impedance test equipment and high-frequency performance testing capabilities, conducting full inspection of key parameters to ensure every batch of products meets design requirements.

MaxiPCB Core Manufacturing Capabilities

Quality Assurance & Compliance

• All high-frequency PCB products are manufactured in strict accordance with IPC-6012 Class 2/Class 3, IPC-2251 international standards, with a fully closed-loop quality management system covering raw material incoming inspection, in-process SPC control, and finished product reliability testing
• Professional DFM engineering team provides free pre-production high-frequency design for manufacturability audits, optimizing stack-up design, impedance calculation, and transmission line structure to reduce production risks and ensure high-frequency performance realization
• All products fully comply with RoHS, REACH and other global environmental regulations, supporting automotive-grade, industrial-grade, aerospace-grade high-reliability application scenarios
• Our dedicated high-frequency PCB team has in-depth mastery of high-frequency material characteristics and mature, fully validated production processes, ensuring stable batch consistency and industry-leading on-time delivery rates