Millison Telecom Components & Thermal Solutions

Supply and manufacturing of Millison precision aluminium telecom hardware: outdoor 5G base station enclosures, cavity filters, RF shielding covers, high-density skived heatsinks and thermal plates. Engineering support by drawings and OEM parts.

5G and 4G base station structural housings

Millison manufactures die-cast outdoor weatherproof enclosures and structural chassis for 4G, 5G and 5.5G radio access network modules (AAU, RRU, BBU).

The designs combine thin-wall high-strength aluminium casting, integrated natural convection heatsink fins, and precision internal mounting surfaces for RF circuit boards. Products deliver IP67 and IP68 environmental protection across extreme climatic operating conditions.

Precision high-pressure die casting for Massive MIMO outdoor radio units.
Integrated external heatsink fins with aerodynamically optimised profiles.
IP67 and IP68 ingress sealing protection for harsh outdoor installation.
High structural resilience against extreme wind shear, vibration and thermal fatigue.

5G cavity resonator filters and duplexers

Millison manufactures cast cavity bandpass filters, duplexers and multiplexer housings for cellular mobile base stations. High-pressure die casting yields smooth internal cavity wall finishes with minimal micro-porosity.

Precision finishing of resonator poles on Makino machining centres combined with internal silver electroplating ensures high quality factor (Q) and ultra-low insertion losses.

Exceptional dimensional accuracy across internal resonator cavities and waveguides.
Precision milling on Makino 5-axis centres achieving micron-level tolerances.
Electrolytic silver plating on internal surfaces minimizing RF attenuation.
Strict suppression of out-of-band emissions and passive intermodulation (PIM).

Precision RF electromagnetic shielding covers

Millison electromagnetic shielding covers provide high-attenuation RF isolation separating sensitive transceiver sections from high-speed digital processing circuits.

Cast partitioning ribs closely follow PCB component layouts, while automated Formed-in-Place (FIP) dispensing of conductive elastomeric gaskets ensures uniform grounding and continuous shield perimeter integrity.

Electromagnetic shielding effectiveness (EMC/EMI) exceeding 100 dB.
Complex internal dividing rib geometry mapped to PCB module layouts.
Automated dispensing of conductive Formed-in-Place (FIP) elastomeric gaskets.
Strict flatness control on thin-wall covers maintaining uniform clamping pressure.

Small cells and micro base station housings

For high-density urban 5G deployments and private industrial networks, Millison produces compact aluminium enclosures for small cells and pico base stations. Housings are engineered for installation on light poles, building facades and indoor architectural surfaces.

Passive natural convection cooling eliminates noisy fans while supporting high RF output power.

Compact form factor and lightweight construction for easy pole mounting.
Silent passive natural heat dissipation without mechanical cooling fans.
Weather-resistant exterior coating with durable UV degradation protection.
Integrated sealed cable entry ports and quick-mount bracket interfaces.

High-density skived fin thermal heatsinks

Millison produces high-performance skived-fin heatsinks featuring dense, ultra-thin fin profiles.

Skived fins are shaved directly from solid extruded aluminium or copper ingots without soldering interfaces, eliminating contact thermal resistance and delivering peak heat transfer from high-power LDMOS and GaN RF power amplifier devices.

Ultra-high fin density with fin spacing down to sub-millimetre pitch.
One-piece solid base-to-fin construction with zero interface thermal resistance.
Targeted cooling for high-power-density ASIC, FPGA and GaN amplifier devices.
Hybrid design capability embedding copper core spreaders into aluminium fin arrays.

V-profile heatsink housings for 5G AAU

Enclosures featuring V-profile heatsink fins (V-fin) were engineered by Millison specifically for outdoor 5G Massive MIMO Active Antenna Units (AAU).

The inclined V-shaped fin geometry reduces natural aerodynamic airflow resistance, prevents dust accumulation and reduces operating temperatures across internal transceiver circuit boards by 8–12 °C compared to conventional parallel fins.

Inclined V-fin geometry with fluid-dynamically optimised airflow channels.
Reduced aerodynamic drag for enhanced upward thermal stack velocity.
Self-cleaning surface dynamics shedding rainwater and airborne dust particles.
Efficient passive cooling supporting total transceiver RF dissipation exceeding 300 W.

Thermal spreader plates and vapor chamber panels

To eliminate concentrated thermal hotspots generated by high-throughput DSP processors and baseband modems, Millison manufactures thermal spreader plates integrating two-phase sintered heat pipes and thin planar vapor chambers.

Embedding two-phase cooling devices within aluminium die-cast bases achieves uniform isothermal heat spreading across the full unit footprint.

Embedded sintered copper heat pipes soldered into precision cast aluminium grooves.
Equivalent thermal conductivity exceeding 2,000 W/(m·K) across active zones.
Ultra-slim packaging profiles fitting dense telecom rack equipment configurations.
Thermal mating zone flatness within 0.03 mm for direct low-resistance die contact.

Precision CNC finishing and protective coatings

Final finishing of Millison telecom housings and filter bodies is executed on high-speed 5-axis DMG MORI and Makino machining centres. Critical tolerances on connector bosses and mounting pads are monitored using in-process Renishaw touch probes.

Automated chemical finishing lines apply anti-corrosion chromate conversion coatings and outdoor automotive-grade powder finishes.

Multi-axis CNC milling for RF coaxial connector ports including SMA, N-type and DIN.
Automated finishing processes: chemical passivation, electrophoresis and powder coating.
Salt spray environmental testing exceeding 1,000 hours according to ASTM B117.
Strict particulate cleanliness inspection inside resonant filter cavities.

How to procure Millison telecom die castings

To order Millison base station enclosures, cavity filters, shielding covers or skived heatsinks, submit your enquiry with OEM part numbers or dimensional drawings. Specify alloy designation, ingress protection class (IP67/IP68), and target delivery volumes.

When servicing installed network infrastructure or replacing storm-damaged radio units, provide photos of the unit nameplate, casting serial marks, RF connector types and operational frequency bands (Sub-6 GHz, mmWave).

For newly engineered 5G and small-cell platforms, submit 3D CAD files in STEP or Parasolid formats detailing thermal budgets, PCB envelope constraints and electromagnetic shielding criteria. We will provide full thermal and tooling feasibility assessments.

Tooling capability and high-pressure die casting

Millison operates an advanced in-house tool manufacturing centre equipped with Makino and DMG MORI 5-axis high-speed milling centres, precision sinker EDM and wire-cut electrical discharge machinery.

Production die-casting cells range from 800 up to 4,500 tons clamping force, outfitted with automated ladle extractors, robotic sprayers and vacuum-assisted cavity evacuation systems.

High-vacuum die casting eliminates gas entrapment and shrinkage voids within thin-walled structural members and resonant cavity dividers, ensuring flawless surface integrity for subsequent microwave electroplating.

Thermal CFD simulation and natural convection design

Fanless natural convection performance in harsh outdoor mast environments is achieved through rigorous computational fluid dynamics (CFD) and finite element thermodynamic modelling.

Millison thermal engineers optimise fin spacing, draft angles and V-shaped convective fin arrays to maximise natural vertical stack buoyancy and enhance heat extraction even under zero-wind ambient stagnation.

Prototype and pre-series enclosures are fully validated in environmental climate chambers under continuous thermal load simulating ambient temperatures up to +55 °C under peak solar radiation.

Electromagnetic shielding and surface plating

To eliminate high-frequency parasitic coupling and crosstalk between active RF channels, Millison performs high-precision face milling on shielding partition rib contact perimeters.

Automated dispensing of conductive silicone gaskets using Formed-in-Place (FIP) robotic systems creates low-impedance electrical bonding along continuous sealing perimeters under fastener torque.

Internal cavity surfaces receive electrolytic silver plating up to 5–10 microns in thickness, minimizing RF surface skin resistance and delivering outstanding cavity filter Q factors.

Passive intermodulation (PIM) and non-destructive testing

Passive intermodulation (PIM) performance is verified on dedicated automated 5G test benches, ensuring ultra-low harmonic distortion across multi-carrier commercial frequency allocations.

High-resolution real-time X-ray inspection inspects casting wall integrity around RF connector bosses and mast-mounting brackets to eliminate internal inclusions or porosity.

Climate-controlled inspection suites house Hexagon coordinate measuring machines (CMM) verifying flange flatness, hole true positions and cavity depths across production batches.

Quality control, packaging and global logistics

Millison operates large-scale telecom production clusters in Chongqing and across China, delivering hundreds of thousands of precision base station castings every month to world-leading telecom OEMs.

Components are packed in custom anti-static dunnage trays with shock-absorbing foam inserts protecting delicate heatsink fins and electroplated silver surfaces from handling damage.

We coordinate complete logistics, export documentation and freight delivery to customer warehouses across global destinations with strict IATF 16949 and ISO 9001 certified quality control.

Environmental coating and corrosion protection

Millison applies automotive and outdoor telecom grade chemical conversion coatings, automated multi-stage electrophoresis, and electrostatic powder coating resistant to severe industrial and coastal atmospheric exposure.

Surface coatings withstand neutral salt spray testing exceeding 1,000 hours per ASTM B117 specifications, maintaining excellent adhesion and color stability under continuous ultraviolet solar radiation.

Connector threads and critical grounding pads are masked with precision robotic fixtures, preserving perfect electrical continuity while protecting exterior exposed aluminium surfaces.

Product pricing, minimum order quantities and tooling lead times are quoted against detailed drawings and technical specifications.