Next-Gen Telecom Networks
External Interfaces for 5G Radio Units
A remote radio unit spends its life outdoors on a tower or a rooftop, and its external RF ports take the weather with it. These are the sealed, low-PIM interfaces that carry the signal between the radio and the antenna — specified to hold their return loss through a decade of wind loading, rain and thermal cycling.
IP67 Sealed
Low PIM
N-Type
4.3-10
Sub-6 GHz
-160 dBc
PIM Floor
IP67
Ingress Rating
DC–18 GHz
Coverage
Design Notes
What an External Radio Port Has to Survive
Five things decide whether an outdoor RF port is still in specification five years after it was installed.
01
Weather Sealing
A tower-top port is sealed at the interface, not just at the enclosure wall. Captive gaskets and a controlled coupling torque keep IP67 intact through the thermal breathing cycle that pulls moisture into a poorly sealed joint.
02
Passive Intermodulation
Two high-power downlink carriers meeting a non-linear junction generate products that land in the uplink band and raise the noise floor across the whole sector. PIM is a plating and contact-pressure problem long before it is a design problem.
03
Mechanical Loading
Jumper weight, wind and ice all pull on the connector body. Bulkhead and flange formats transfer that load into the enclosure rather than into the centre contact.
04
Thermal Cycling
A rooftop port can swing more than a hundred degrees between a winter night and a summer afternoon. Dissimilar expansion rates in the dielectric and the body are what open a joint over time.
05
Field Serviceability
Radio units get swapped. Interfaces that can be re-mated on a tower, in gloves, without a torque wrench being lost down the mast, keep the maintenance window short.
Reference Data
Typical Interface Requirements
Exact figures depend on the band plan and the operator specification. These are the conditions external radio-unit ports are normally held to.
| Parameter | Typical Requirement | Relevant Series | Note |
|---|---|---|---|
| Ingress protection | IP67 mated | N-Type, 4.3-10 | Sealed at the interface, not the panel |
| PIM (2 × 43 dBm) | ≤ -160 dBc | Low-PIM N-Type | Plating and contact pressure dominate |
| VSWR | ≤ 1.15 to 6 GHz | N-Type, SMA | Per series datasheet |
| Operating temperature | -40 °C to +85 °C | All outdoor series | Wider ranges available |
| Coupling torque | Per IEC 61169-16 | N-Type | Under-torque is the usual PIM cause |
| Salt spray | MIL-STD-202 Method 101 | Passivated bodies | Coastal and marine sites |
Our Role
What We Supply for Radio-Unit Builds
01
Low-PIM Outdoor Ports
Weatherproof N-type and panel-mount interfaces built for the PIM floor a live sector actually needs, not just the number that passes on a bench.
02
Jumpers Built to Length
Phase-matched radio-to-antenna jumpers made to your run lengths and bend radii, so nothing is coiled and cable-tied on the mast.
03
Volume From Our Own Line
Infrastructure rollouts need repeatable parts in quantity. We manufacture in-house, so the hundredth unit matches the first.
Selected Products
Interfaces for Radio-Unit Ports
Common starting points for external radio-unit interconnect. Tell us the band, the power and the enclosure and we will quote the configuration.
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N Female 4-Hole Flange Mount RF Connector – Field Replaceable, 18.35mm Hole Spacing, 0.38mm Pin Diameter
$23.00 Add to cartQuick View -
N Female 4-Hole Flange Mount RF Connector – Field Replaceable, 18.35mm Hole Spacing, 0.46mm Pin Diameter
$22.00 Add to cartQuick View -
N Female to N Female RF Adapter
$22.00 Add to cartQuick View -
N Male to N Male System Interconnect Low-Loss RF Cable Assembly – Use CFS830H Coax
$20.00 Add to cartQuick View
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Radio-Unit Engineering Support
Specifying an Outdoor RF Port?
Send us the band plan, the power level and the enclosure drawing, and our engineers will come back with an interface proposal.