——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:
✉ [email protected]
🌐 https://www.kkpcb.net/