Precision Test Cables | Metrology-Grade RF Test Cable up to 110 GHz | Vinstronics

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DC to 110 GHz Standard & KA/KB Protected Builds Metrology-Grade RF Measurement Paths

Precision Test Cables

Metrology-grade coaxial assemblies designed for stable, repeatable, and high-confidence RF measurements across laboratory, VNA, and production test paths. Choose the right build path by frequency band, routing environment, and protection level.

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Need a faster recommendation? Send frequency, connector interfaces, and required length.

FIG 1.0 TEST CABLE SELECTION LOGIC Standard / KA / KB Structure 110 / 67 / 50 / 40 / 26.5 / 18 GHz

Built for Stable Measurements Under Real Routing Conditions

Test cables are part of the measurement path. They should help preserve calibration confidence when routing, movement, and handling become part of the setup.

Mechanical Phase Repeatability

Supports stable phase behavior during routing and handling in precision measurement setups.

Controlled Amplitude Variation

Helps reduce flexure-driven loss variation that can distort test interpretation.

Structure Choice for Real Environments

Choose standard or protected constructions based on whether the cable remains bench-routed or faces more handling.

Choose the Right Test Cable Path

Start with the required frequency band, then confirm whether the setup calls for standard routing flexibility or added mechanical protection.

Millimeter-Wave Measurement

For 67 GHz and 110 GHz selection paths where the upper frequency limit is the primary filter.

Max Frequency: 67 GHz / 110 GHz

Typical Use: mmWave validation, high-frequency VNA measurement

Consult mmWave Build

Microwave Laboratory & Validation

For 40 GHz and 50 GHz paths balancing precision measurement with practical routing flexibility.

Max Frequency: 40 GHz / 50 GHz

Typical Use: laboratory measurement, RF device evaluation

Consult Microwave Build

Production, EMC & Field Test

For 18 GHz and 26.5 GHz paths where mechanical robustness and routing durability matter more.

Max Frequency: 18 GHz / 26.5 GHz

Typical Use: production test, EMC measurement, field service routing

Consult Production Build

Structure Options: Standard vs. KA/KB

Protected constructions are available when the setup includes more handling, movement, or external mechanical stress. KA uses stainless steel wire braiding for improved mechanical protection. KB adds spiral wrap support for more demanding torsion and handling conditions. For controlled bench and laboratory routing, the standard construction often remains the cleaner and more flexible choice.

Standard Build KA Protected Build KB Protected Build

Core Selection Matrix

Use this matrix to narrow the frequency path first, then confirm whether diameter and bend limits fit your routing environment.

Short Code	Max Frequency	Outer Diameter	Static Bend Radius	Dynamic Bend Radius	Protected Option
T18	110 GHz	1.85 mm	10 mm	20 mm	T18KA/KB
T24	67 GHz	2.40 mm	12 mm	24 mm	T24KA/KB
T36	50 GHz	3.60 mm	18 mm	36 mm	T36KA/KB
T42	40 GHz	4.20 mm	21 mm	42 mm	T42KA/KB
T50	26.5 GHz	5.10 mm	25 mm	50 mm	T50KA/KB
T80	18 GHz	7.80 mm	40 mm	80 mm	T80KA/KB

Engineering Note: KA/KB protected builds provide model-level phase and amplitude stability references. Final assembly performance still depends on connector type, attachment method, and overall cable length. For protected builds, overall dimensions and mechanical values should be treated as representative references and confirmed during final selection.

Engineering FAQ

What is a precision test cable?

It is a metrology-grade coaxial assembly designed to maintain stable and repeatable performance across high-frequency measurement paths. It helps preserve calibration confidence when routing, movement, and handling become part of the setup.

How do I choose between standard and KA/KB structure?

Standard structures offer flexible routing and easy handling, ideal for benchtop VNA testing and static device evaluation. KA/KB protected builds are intended for production testing, field measurement, and dynamic setups where greater mechanical protection is needed.

What should I look at first?

You should first identify the appropriate frequency path by matching the maximum operating frequency of your measurement setup. Then confirm the required level of mechanical protection and handling conditions.

Do I need KA/KB if the frequency code is the same?

Not always. KA/KB options are recommended when the same frequency path must operate in a more demanding mechanical environment, not simply because the short code is the same.

Can final performance vary with connectors and cable length?

Yes. The final assembly performance, including key metrics like VSWR and overall insertion loss, is dependent on the specific connector types, attachment methods, and overall cable length.

What is required for a quote?

To define a suitable assembly recommendation, please provide the maximum operating frequency, connector type on each end, required structure preference, overall assembly length, and whether the setup is controlled, frequently handled, or mechanically demanding.

Download Technical Guide

Download the technical guide for full dimensional data, attenuation references, K1/K2 constants, and model-level mechanical limits across standard and KA/KB builds.

Download Full PDF

Request Build Recommendation

Submit your target frequency, connector interfaces, structure preference, and required length. Our engineering team will recommend the most appropriate build path.

Request Engineering Recommendation