The five manufacturing requirements behind 5G and satellite PCBs — low-loss materials by band, ±5% impedance, low-Rz ENIG, 25 µm registration and thermal vias — with selection tables, finish comparison and a 64-element array case.
5G networks and satellite internet run on their PCBs: high-frequency boards are the backbone of signal transmission in both, and in always-on infrastructure they decide network stability at millimeter-wave frequencies, signal integrity across GHz bands and power efficiency around the clock. This guide defines the five core manufacturing requirements those systems demand, then turns them into selection and qualification criteria.
Material selection follows the band:
Whatever the laminate, two parameters are non-negotiable: Dk tolerance of ±0.05 or tighter and Df at or below 0.002 at the target frequency — the RO4350B side is examined in our 5G RO4350B selection guide and the 5880 side in the RT/duroid 5880 parameter set.
| Application | Recommended Materials | Key Properties |
|---|---|---|
| Sub-6 GHz 5G | Rogers RO4350B | Dk = 3.48, Df = 0.0037 |
| mmWave (28 GHz+) | RT/duroid 5880 | Dk = 2.2, Df = 0.0009 |
| Satellite comms | Taconic TLY-5A | CTE = 16 ppm/°C |
Line width and spacing of 100 µm or below, LDI exposure at ±5 µm pattern accuracy, impedance tolerance within 5% on 50 Ω/100 Ω lines, and etch factor of at least 3:1 on 35 µm copper — phase-sensitive antenna work leans hardest on these, per our 5G antenna impedance-consistency guide.
Nickel at 3–5 µm under 0.05–0.1 µm of gold, with surface roughness held below Rz 0.5 µm — the conductor-level roughness that conductor loss cares about.
Alignment accuracy of 25 µm or better and dielectric thickness variation within ±3% keep stacked structures — antenna arrays especially — electrically repeatable from board to board.
Always-on power needs heat paths: thermal vias of 0.2 mm diameter on 1 mm pitch, and metal-core options where 5–8 W/m·K conductivity is required.
The band decides the shortlist — sub-6 GHz 5G runs RO4350B or RF-35, millimeter-wave moves to RT/duroid 5880 or Astra MT77, and LEO satellites favor TLY-5A or RO4835 — the satellite-construction side is expanded in our phased-array satellite PCB guide.
Finish follows function: ENIG for the lowest insertion loss on RF layers, OSP for moderate-loss power planes, and immersion silver for mixed-signal boards — the full tradeoff space is compared in our surface finish analysis.
Four gates qualify a supplier for this tier: PTFE processing experience, 110 GHz VNA testing capability in-house, signal-integrity simulation support during design, and IPC-6018DA certification — plus DFM analysis, lot traceability for aerospace programs and complete test reports covering insertion loss, phase consistency and TDR impedance profiles.
The requirements translate directly into results: a 64-element phased array built to this specification achieved 0.15 dB/inch loss at 40 GHz, phase matching within ±2° and a 98% first-pass yield — the numbers that separate communication-grade production from general-purpose RF work.
Frequently Asked Questions
By band: Rogers RO4350B (Dk 3.48, Df 0.0037) for sub-6 GHz, RT/duroid 5880 (Dk 2.2, Df 0.0009) for 28 GHz+ millimeter-wave, and Taconic TLY-5A (CTE 16 ppm/°C) for satellite constructions.
Lines and spaces at 100 µm or below, LDI accuracy of ±5 µm, impedance within 5% on 50/100 Ω lines, and etch factor of at least 3:1 on 35 µm copper.
Thermal vias of 0.2 mm diameter on 1 mm pitch carry heat off hot components, and metal-core constructions provide 5–8 W/m·K conductivity where power density demands it.
PTFE processing experience, in-house 110 GHz VNA testing, signal-integrity simulation support and IPC-6018DA certification, with full test reports and lot traceability.
Send your band, power level and environment and we will confirm material, finish and qualification readiness.
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