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Mobile Base Station Antenna Feeder

The antenna feeder chain decides VSWR, uplink sensitivity and cell radius. 50Ω corrugated copper tube cable is used for the main run, pre-terminated jumpers bridge the RRU and antenna, and N-type or 7/16 DIN connectors join the tower-top and equipment-room ends. PTL supplies the complete set — feeder, jumper and connector — with VSWR checked batch by batch.

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01 — Chain

How the link is put together

① BBU / equipment room

The main run from the equipment room to the tower top, typically 30–100 m, dominates the total insertion loss of the chain.

② Main feeder

7/8" or 1-5/8" corrugated copper tube for low loss and high shielding; 1/2" where the run is short or the RRU sits close to the antenna.

③ Tower-top jumper

A 1/2" super-flexible jumper covers the last 2–5 m, with a tight bend radius for routing between the pole and the antenna back panel.

④ Connectors and weatherproofing

N male or 7/16 DIN, factory-fitted or field-installed, with weatherproof tape and grounding at the joint.

02 — Selection

What to specify

Fill these in and any supplier can quote the same basis — which is exactly why we publish them.

System impedance	50Ω ± 1Ω
Feeder sizes	1/2", 7/8", 1-5/8" corrugated copper tube (annular / helical)
VSWR	≤ 1.15 at 800–2700 MHz for assembled jumpers
Shielding	≥ 90 dB with copper tube outer conductor
Jacket	Black UV-stable PE outdoors; LSZH for equipment rooms and tunnels
Bend radius	≥ 10 × outer diameter, one-time bend

03 — Models

Recommended for this application

All products

1/4" Super Flexible · 50Ω

3/8" Annular Corrugated Copper Tube Coaxial Cable

50Ω RF Corrugated Copper Tube Coaxial Cable →1/2" and 7/8" main feeder, sized by run length and band

50Ω RF Corrugated Aluminum Tube Coaxial Cable →Aluminum tube option — lighter for rooftop lifting

50Ω Coaxial Jumper & Pre-terminated Assemblies →Pre-terminated tower-top jumpers, VSWR tested piece by piece

50Ω RF Connectors & Adapters →N-type and 7/16 DIN connectors and adapters

04 — FAQ

Questions we get asked

How do I choose between 1/2" and 7/8" feeder?

Work from run length and band. Under 30 m at 2.6 GHz or below, 1/2" is enough; beyond 30 m, or at 3.5 GHz, 7/8" cuts attenuation by roughly 40% and leaves more headroom. Send us the length, band and loss budget and we will work it back from the dB/100 m curve.

Are jumpers factory-assembled or field-terminated?

Factory-assembled is recommended. Each pre-terminated jumper is VSWR-tested before shipping with a record attached, and the site work is limited to tightening and weatherproofing. Field termination depends on tools and technique and is the most common cause of failed VSWR.

Can you provide VSWR test reports?

Yes. Assembled jumpers ship with batch test records; feeders can be sampled per project with vector network analyser data. Tell us at order stage if a third-party report is required.