——12-Channel Isolation & High Reliability for Mission-Critical RF Systems
1. Customer Challenge
- Application: Military/5G Base Station SDR Backplane
- Critical Requirements:
- Support 12 independent RF channels without interference
- Achieve cross-channel isolation >65dB @2.4GHz
- Pass FCC Part 90 certification for industrial radio equipment
- Withstand harsh environments (85°C/85%RH for 1,000+ hours)
2. KKPCB’s Innovative Solution
(1) Ultra-High Isolation Design
- EBG (Electromagnetic Bandgap) Structures:
- Suppressed cavity resonances, achieving >70dB isolation @2.4GHz
- Optimized via 3D full-wave EM simulation (CST Studio Suite)
- Segmented Ground Planes:
- Separated digital/RF/power domains, reducing common-mode noise by 18dB
(2) Extreme Environment Reliability
- CAF-Resistant Laminate (Tg≥180°C):
- Passed 1,000h 85°C/85%RH HAST test (per IPC-TM-650 2.6.25)
- Press-Fit Connector Zones:
- 20μm ENEPIG plating for 5,000+ mating cycles
3. Verified Performance
| Parameter | Target | KKPCB Result |
|---|---|---|
| Channel Isolation | >65dB | 72dB @2.4GHz |
| Insertion Loss | <0.8dB/inch | 0.5dB/inch |
| Thermal Aging | 1,000h | No CAF, delamination |
| Compliance | FCC Part 90 | Certified |
► Business Impact:
- Enabled customer’s First-Time-Right FCC certification, cutting 3-month delays
- Now in volume production with 99.6% assembly yield
4. KKPCB’s RF Backplane Expertise
✔ Multi-Channel Isolation: EBG/DGS techniques up to 100dB
✔ Hybrid Materials: Rogers/Arlon + CAF-resistant FR4
✔ High-Speed Ready: Supports 56G PAM4 (for O-RAN applications)
► Need a High-Isolation RF Backplane?
Contact KKPCB for free signal integrity analysis:
✉sales@kkpcb.com
