Temperature Phase Stability
Cable Assemblies
for Equipment Wiring
Low Density PTFE dielectric ensures excellent phase stability against temperature fluctuations. Four variants from 18.5 to 40 GHz, rated -65 to +125 C — purpose-built for equipment wiring in demanding environments.
Built for Temperature Stability
The 3 Series cable assemblies use a Low Density PTFE dielectric material to ensure excellent phase stability against temperature fluctuations — the defining requirement for equipment wiring in thermal environments. The continuous operating temperature range is -65 to +125 C, making them suitable for aerospace, defense, and industrial applications where cables must perform across the full thermal cycle.
- ✓Phase stability: temperature change — primary design goal
- ✓Low Density PTFE dielectric for minimal thermal phase shift
- ✓Wide temperature range: -65 to +125 C across all variants
- ✓Four frequency options: 18.5 GHz (multiple sizes), 26.5 GHz, 40 GHz
- ✓Ultra-long assembly lengths: up to 20,000 mm
- ✓Ultra-slim option: MWX311 at 2.7 mm OD, 18.5 g/m
- ✓Three construction types: Non-Armored, Armored, Lightweight Armored
- ✓Ships in 10-11 business days — RoHS compliant
Non-Armored Type (5 layers)
Armored Type (8 layers)
Cable Photography
4 Cable Variants
Choose by frequency and outer diameter. All variants share 50 Ohm impedance, -65 to +125 C operating temperature, and Low Density PTFE dielectric.
Lightest at 18.5 g/m — 10 mm bend radius
Up to 20 m length — widest connector choice
26.5 GHz — up to 20 m, SMA and 3.5 mm
Highest frequency — 40 GHz, slim 4.0 mm OD
Technical Comparison
All specifications are typical values at 25 C. RoHS compliant. Characteristic impedance 50 Ohm on all variants.
| Model | Max Freq. | OD | Mass | VSWR | Ins. Loss | Prop. Delay | Vel. of Prop. | Bend Radius | Length Range |
|---|---|---|---|---|---|---|---|---|---|
| MWX311 | 18.5 GHz | 2.7 mm | 18.5 g/m | 1.40 | 3.4 dB/m | 4.25 ns/m | 79% | 10 mm | 100 - 10,000 mm |
| MWX312 | 18.5 GHz | 4.1 mm | 42 g/m | 1.40 | 2.2 dB/m | 4.10 ns/m | 81% | 20 mm | 100 - 20,000 mm |
| MWX321 | 26.5 GHz | 4.7 mm | 50 g/m | 1.44 | 2.4 dB/m | 4.05 ns/m | 82% | 30 mm | 100 - 20,000 mm |
| MWX341 | 40.0 GHz | 4.0 mm | 40 g/m | 1.44 | 3.5 dB/m | 4.05 ns/m | 82% | 20 mm | 100 - 10,000 mm |
* Typical measured values for reference. Additional 18.5 GHz variants (MWX313, MWX314, MWX315) available — contact us for specifications.
Simple Criteria for Cable Selection
All 3 Series cables share the same Low Density PTFE core and 50 Ohm impedance. Choose frequency and OD based on your application requirement.
Lower Insertion Loss
Choose a larger outer diameter cable
Higher Frequency
Choose a smaller outer diameter cable
Higher Power Rating
Choose a larger outer diameter cable
Longer Cable Run
MWX312 or MWX321 support up to 20,000 mm
The EMF Series Family
The full EMF product family covers RF and microwave cable assemblies for every test and measurement application.
Ready to order or need technical advice?
Koto Electronics is the authorized Israeli representative of Junkosha Inc. Contact us for pricing, availability, and custom specifications.