Product Characteristics
1. High-Frequency and High-Speed Performance
Description: This is its most core feature. The board must reliably process and transmit high-frequency radio frequency (RF) signals and high-speed digital signals (e.g., SerDes). This requires the board substrate material to have a low dielectric constant (Dk) and low dissipation factor (Df) to minimize signal attenuation and distortion during transmission.
2. Strict Impedance Control
Description: To ensure Signal Integrity (SI) and prevent signal reflection, high-frequency transmission lines on the board (e.g., microstrips, striplines) require strict controlled impedance (typically 50 ohms single-ended or 100 ohms differential). This places extremely high demands on the consistency of trace width, spacing, and dielectric layer thickness in PCB manufacturing.
3. Complex Multi-layer and HDI Design
Description: To accommodate complex routing, shielding layers, and power planes, communication boards often employ a multi-layer structure (often 8 layers or more). Simultaneously, High-Density Interconnect (HDI) processes, such as microvias, buried vias, and finer trace width/spacing, are commonly used to achieve miniaturization and high-density component layout.
4. Excellent Signal and Power Integrity
Description: Through careful simulation and design, it ensures high-quality eye diagrams for high-speed digital signals, reducing jitter and crosstalk. Meanwhile, Power Integrity (PI) design is critical, providing stable, clean power to high-speed processors, FPGAs, and ASICs to prevent system bit errors caused by power supply noise.
5. Robust Thermal Management
Description: Communication equipment (especially base stations, core network gear) typically operates 24/7, with high-power chips. The board design must incorporate efficient heat dissipation, often using heavy copper foils, thermal vias, embedded metal blocks, or close integration with metal core PCBs/heat sinks.
6. High Reliability and Stability
Description: Boards used in network infrastructure demand a very long Mean Time Between Failures (MTBF). They use high Tg materials and undergo rigorous reliability testing (e.g., thermal cycling, drop testing) to adapt to harsh environments and ensure stable operation for many years.
7. Stringent Electromagnetic Compatibility (EMC)
Description: Board-level design must fully consider Electromagnetic Compatibility (EMC) and Electromagnetic Interference (EMI) suppression. Through the use of shielding cans, filter circuits, proper grounding strategies, and stack-up planning, it prevents self-generated signals from radiating interference and resists external interference.
Product Application Field
1. Radio Access Network (RAN)
Base Stations: Include macro cells, small cells, and distributed antenna systems (DAS). Boards must handle high-frequency RF signals (e.g., 5G mmWave) for signal amplification, filtering, and modulation/demodulation.
Remote Radio Units (RRUs): Handle the RF processing functions of base stations; boards require excellent high-frequency performance and thermal management.
Antenna Systems: Circuit boards within Active Antenna Systems (AAS) for beamforming and signal processing.
2. Core Network & Transport Network
Routers & Switches: Form the core of the internet and data centers. Their boards require immense data throughput, high port density, and extreme reliability, supporting high-speed interfaces (e.g., 400GbE).
Optical Transport Equipment: e.g., OTN, SDH equipment. Their boards handle optical-to-electrical conversion, cross-connect, and long-haul transmission, demanding exceptional signal integrity.
Network Security Appliances: Firewalls, Intrusion Detection/Prevention Systems (IDS/IPS). Their boards perform high-speed packet inspection and encryption operations.
3. Access Network
Fiber-to-the-Home (FTTH) Equipment: e.g., Optical Line Terminals (OLTs) and Optical Network Units (ONUs). Boards enable fiber access and broadband distribution to homes/businesses.
Microwave Transmission Equipment: Used for point-to-point wireless data links; boards operate in microwave frequency bands.
4. Mobile Terminals
Smartphones/Tablets: Mainboards and RF front-end modules are epitomes of high integration, combining multiple wireless technologies (cellular 2G-5G, Wi-Fi, Bluetooth, GPS).
Cellular Modules: Embedded into various IoT devices (e.g., shared bikes, smart meters) to provide wireless connectivity.
5. Fixed & Short-Range Wireless Terminals
Home Routers/ Gateways: Handle wireless access and routing for home networks.
Modems: Including cable modems and DSL modems.
Bluetooth/Wi-Fi Devices: e.g., wireless headphones, smart speakers, IoT sensors.
6. Professional & Dedicated Communication Equipment
Satellite Communication Terminals: e.g., satellite phones, VSAT terminals. Boards must process satellite signals in specialized frequency bands.
Two-Way Radios & Trunked Radio Systems: Used for professional communication in public safety, security, and logistics.
Telematics Control Units (TCUs): Used in vehicular communication for Vehicle-to-Everything (V2X) connectivity.
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