Radar front end / EMC chamber / lab / industrial equipment

Radar, Test & Industrial RF

Radar, chamber and laboratory RF chains are sensitive to three things: insertion loss, phase stability and shielding. Semi-flexible and high-temperature cables dominate here — once formed, their electrical length stops changing and phase stays repeatable, whereas an ordinary braided cable shifts phase every time it is bent.

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01 — Chain

How the link is put together

① Fix band and loss budget

Start from the allowable insertion loss and work back through the dB/m curve to a diameter — not from a model number.

② Choose construction and temperature

Semi-flexible for fixed runs that hold their shape; flexible where the cable moves; PTFE dielectric near heat sources.

③ Connectors and phase

SMA or N-type; phase-matched pairs should come from the same batch and be marked with electrical length.

④ Shielding and grounding

Double shield (foil plus braid) or copper tube, grounded at one or both ends as the equipment requires.

02 — Selection

What to specify

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

Impedance	50Ω
Temperature	-55 to +200 °C with PTFE dielectric
Shielding	≥ 100 dB with double shield or copper tube
Phase stability	Electrical length fixed after forming, suitable for phase-matched pairs
Connectors	SMA, N-type, TNC
Bend radius	Semi-flex: 3–5 × OD when formed; flexible: 10 × OD

03 — Models

Recommended for this application

All products

50-047R · 50Ω

50-086 High-Temp Semi-Flexible Cable

50Ω High-Temperature Semi-Flexible Coaxial Cable →50-086 high-temperature semi-flexible, phase stable to 200 °C

50Ω D-FB Series Braided Coaxial Cable →D-FB low-loss braided for general lab use

50Ω PTL Series Braided Coaxial Cable →PTL braided series for economical short jumpers

50Ω RF Connectors & Adapters →SMA and N-type connectors and adapters

04 — FAQ

Questions we get asked

Semi-flexible or flexible cable?

Ask whether the cable will move. For fixed runs that must hold a shape and keep phase, use semi-flexible: it forms and stays, so electrical length is stable. Where the cable is flexed repeatedly or mated often, use flexible or super-flexible and accept slightly higher loss and some phase change with bending.

Can you supply phase-matched pairs?

Yes. Produced and tested in the same batch, then paired by electrical length with the difference held within 1–2° at 1 GHz, and each label marked with electrical length and test frequency.

Can you build special connector combinations to drawing?

Yes — N-to-SMA, SMA-to-TNC, right-angle and bulkhead versions, built to drawing or sample and shipped with insertion loss and VSWR data.