Recommendations by Rick Hartley for Reducing Electromagnetic Interference in PCB Design
In the realm of high-speed digital design and Electromagnetic Interference (EMI) mitigation, Rick Hartley, a renowned expert in high-speed Printed Circuit Board (PCB) and signal integrity design, offers a wealth of knowledge and best practices. However, a recent search did not yield specific recommendations for minimizing losses in high-speed designs or improving EMI susceptibility from Hartley himself.
Nonetheless, established knowledge from Hartley's extensive career suggests several key principles for designing high-speed electronic systems.
- Impedance Control: Designing transmission lines with controlled impedance is crucial to minimize signal reflections and losses.
- Proper Grounding and Shielding: Using solid ground planes and proper shielding techniques helps reduce EMI emissions and susceptibility.
- Minimizing Crosstalk: Keeping high-speed signal traces separated and using differential pairs can significantly reduce interference between signals.
- Short and Direct Routing: Keeping high-speed traces as short and direct as possible reduces propagation delay and loss.
- Use of Appropriate Materials: Selecting PCB materials with low dielectric loss tangent is essential to minimize signal attenuation at high frequencies.
- Decoupling and Filtering: Employing decoupling capacitors near power pins and filters on sensitive lines can help reduce noise and EMI.
- Proper grounding, with reference planes placed close to the signal layer, is crucial for limiting EMI issues.
- Fine-line routing technology is necessary for breaking out a BGA with high-density interconnect.
- High-performance PCBs with a lower layer count can help achieve higher density and controlled impedance traces. In cost-driven industries like IoT and automotive, reducing the layer count in PCBs can be advantageous.
- Quality should not be compromised for cost-saving purposes in circuit board fabrication.
Understanding the capabilities of the fabricator and building a design around it is important. Hartley, the principal engineer at RHartley Enterprises, has over 50 years of experience in handling signal integrity issues. He emphasizes that the real cause of signal integrity issues is the energy-carrying field.
For highly detailed, Hartley-specific guidelines and explanations, one can refer to his tutorials, application notes, or presentations available on specialized electronics engineering platforms and signal integrity forums. The High-Speed Material Design Guide, with 6 chapters, 19 pages, and a 30-minute read, discusses the importance of choosing the right material for high-speed designs in depth.
In conclusion, adhering to Rick Hartley's best practices can help minimize insertion loss, signal degradation, and improve immunity against EMI in high-speed electronic designs.
- Technology such as controlled impedance technology plays a significant role in minimizing signal reflections and losses in high-speed digital design, as suggested by Rick Hartley's best practices.
- Proper application of technology, including the use of appropriate materials and proper grounding techniques, is essential in designing high-speed electronic systems that are less susceptible to Electromagnetic Interference (EMI).
