Flexible Cables That Don't Push Back.
The Junkosha EMF 2 Series delivers phase stability and exceptional flexibility with ultra-low repulsion force — protecting your DUT connectors in intensive multi-port measurement environments. Four variants from 26.5 to 67 GHz, available in Israel through Koto Electronics.
Your Cable Is Stressing Your DUT
A stiff microwave cable doesn't just sit there. It pushes, pulls, and twists against every connector it's attached to. In multi-port setups — where four, six, or eight cables are attached simultaneously — that cumulative force is measurable, damaging, and expensive.
Connector Wear
Repeated cable torque on 1.85 mm and 2.4 mm connectors loosens the joint over time. You replace connectors. You re-calibrate. You lose trust in your measurements — all because the cable was fighting the interface.
Multi-Port Setups
Six cables attached to a DUT under test means six spring-back forces acting simultaneously. In wafer probing and antenna characterization, this mechanical stress can physically move the DUT — invalidating the measurement.
Tight Rack Routing
Standard armored cables in a congested ATE rack fight for space, bend sharply, and create constant mechanical tension on port connectors. A 9.5 mm OD cable where you need a 3.7 mm one is a daily engineering compromise.
Flexible. Phase-Stable. Gentle on Connectors.
The 2 Series was engineered for exactly this environment — intensive microwave measurement where cables flex constantly and DUT connectors must survive thousands of connection cycles. Three construction types let you match the cable to the specific demands of your setup.
- ✓Low Repulsion — Protects DUT ConnectorsThe 2 Series minimizes the spring-back force acting on connected ports. In multi-cable setups, this translates directly to longer connector life, more repeatable connections, and measurements you can trust.
- ✓Phase Stability Under Static BendingRouted, bent, and held in position — the 2 Series maintains phase stability in fixed-position measurement applications. Consistent results across every measurement session.
- ✓Three Construction Types for Every EnvironmentStandard armored for bench durability. Non-armored ultra-slim (down to 2.5 mm) for congested routing and ATE racks. Lightweight armored for fixed internal wiring where protection matters but weight does too.
- ✓Four Frequency Variants: 26.5 to 67 GHzMWX221, MWX241, MWX251, MWX261 — all 50 Ω, all RoHS compliant, operating from –30 to +85 °C. Matched-phase options available for differential and multi-port setups.
- ✓Lengths Up to 5,000 mmThe MWX221 (26.5 GHz) and MWX241 (40 GHz) support assembly lengths up to 5,000 mm — the longest in the 2 Series — for large bench or system-level setups.
Get the Right Cable in 3 Steps
Local support in Hebrew and English. No international lead times.
Tell us your frequency, construction type, and routing constraints.
Standard or non-armored? 26.5 or 67 GHz? Tight rack or open bench? We'll match the right variant — including matched-phase pairs if needed.
Receive a quote from your local Israeli contact.
Koto Electronics handles your order directly in Israel. Pricing, availability, and technical questions answered in Hebrew or English — fast.
Connect once. Measure with confidence — every time.
Low repulsion. Phase-stable. Connectors protected. The 2 Series pays for itself the first time it saves you a damaged DUT port.
4 Frequency Options
All variants share 50 Ω impedance and –30 to +85 °C operating range. Non-armored types available for MWX241, MWX251, and MWX261.
Widest connector choice — ideal for benchtop VNA setups
Ultra-slim 4.1 mm non-armored for congested rack routing
3.7 mm non-armored — 50 GHz in the tightest routing path
2.5 mm non-armored, 17 g/m — lightest 67 GHz option available
Technical Comparison
Standard (armored) type specs shown. Non-armored OD: MWX241 4.1 mm / MWX251 3.7 mm / MWX261 2.5 mm, bend radius 6 mm. All values typical at 25 °C.
| Model | Max Freq. | OD (std) | Mass (std) | VSWR | Ins. Loss | Prop. Delay | Vel. of Prop. | Temp. Range |
|---|---|---|---|---|---|---|---|---|
| MWX221 | 26.5 GHz | 6.0 mm | 64 g/m | 1.33 | 1.4 dB/m | 4.40 ns/m | 78% | –30 to +85 °C |
| MWX241 | 40.0 GHz | 9.5 mm | 137 g/m | 1.43 | 3.0 dB/m | 4.35 ns/m | 77% | –30 to +85 °C |
| MWX251 | 50.0 GHz | 9.5 mm | 129 g/m | 1.43 | 3.8 dB/m | 4.36 ns/m | 77% | –30 to +85 °C |
| MWX261 | 67.0 GHz | 7.7 mm | 90 g/m | 1.43 | 5.8 dB/m | 4.38 ns/m | 76% | –30 to +85 °C |
* All specifications are typical measured values for reference. Contact us for non-standard lengths.
Frequently Asked Questions
Everything you need to specify and order the right 2 Series cable.
What does 'low repulsion' mean, and why does it matter?
What is the difference between Standard, Non-Armored, and Lightweight Armored types?
Can I get matched-phase pairs for differential or multi-port testing?
What connector types are available?
How long are typical lead times from Israel?
When should I choose the 2 Series over the 0 Series?
The Full EMF Series
RF and microwave cable assemblies for every test and measurement application.
Stop replacing connectors.
Start measuring longer.
The EMF 2 Series is available in Israel through Koto Electronics — your authorized local source for Junkosha flexible cable assemblies. Get a quote, download the datasheet, or talk to our technical team today.