Kingdta assembles high frequency PCBAs on Rogers, PTFE, and hybrid substrates for RF, microwave, and millimeter-wave applications. Our assembly processes are optimized for RF-sensitive designs where standard SMT practices can compromise RF performance through contamination, solder joint geometry, and component placement accuracy.
High Frequency PCBA: Assembly Considerations
Assembling RF and microwave PCBAs requires attention to factors that don't affect standard digital electronics. Flux residue on RF substrates can absorb moisture and alter the dielectric constant of the substrate, degrading RF performance. Kingdta uses no-clean flux processes and ultrasonic cleaning for RF assemblies where substrate cleanliness is critical.
Component placement accuracy is more critical in RF assemblies than digital designs. Misplacement of RF components — even by 0.1mm — can shift resonant frequencies, alter impedance matching, and degrade filter performance. Our SMT lines achieve ±0.03mm placement accuracy for fine-pitch RF components.
Solder joint geometry on RF components affects impedance. We use optimized solder paste volumes and reflow profiles for RF components including chip resistors, capacitors, inductors, RF connectors, and packaged RF ICs to ensure consistent solder joint geometry.
Technical Specifications
Key Advantages
RF-Specific Assembly Processes
No-clean flux and ultrasonic cleaning options to maintain substrate cleanliness and RF performance.
High Placement Accuracy
±0.03mm placement accuracy ensures RF component positioning meets design intent for impedance-critical layouts.
RF Connector Expertise
Experience with SMA, MMCX, U.FL, and precision RF connectors requiring careful torque and alignment.
Shielding Can Assembly
SMT shielding can placement and reflow soldering for EMI-sensitive RF modules.
RF Functional Testing
VNA and spectrum analyzer testing available to verify RF performance against your specifications.
Rogers Substrate Handling
Proper handling and storage of Rogers and PTFE materials to prevent contamination and moisture absorption.
Where It's Used
5G Infrastructure
Massive MIMO antenna modules, RRU boards
Radar
Automotive radar modules, FMCW radar
Satellite
LNB assemblies, transponder modules
Wireless Comms
Point-to-point radios, WLAN modules
Test Equipment
RF calibration standards, attenuator modules
Medical
MRI RF coils, ultrasound front-end
IoT
UWB modules, mmWave sensors, RFID
Defense
EW systems, communications modules
Why Choose Kingdta for High Frequency?
- RF-specific assembly processes: no-clean flux, ultrasonic cleaning, controlled humidity storage
- ±0.03mm placement accuracy for fine-pitch RF components and connectors
- Experience with Rogers, PTFE, and hybrid substrate handling and assembly
- RF functional testing with VNA and spectrum analyzer for performance verification
- ISO 9001:2015 certified with full traceability and test records
- Engineering support for RF assembly DFM review and test specification development
Frequently Asked Questions
Do you offer RF functional testing?
Yes. We offer RF functional testing using VNA (vector network analyzer) and spectrum analyzer. We can test S-parameters, insertion loss, return loss, and frequency response against your test specification. Custom test fixtures can be developed for production testing.
How do you handle Rogers and PTFE substrates during assembly?
Rogers and PTFE substrates require careful handling to prevent contamination. We store these materials in controlled humidity environments, use clean-room gloves during handling, and apply no-clean flux processes to avoid residue that could affect RF performance.