Low-Loss Semi-Rigid Microwave Coaxial Cables
Precision shapeable interconnects for high-frequency aerospace, radar and instrument assemblies
The MTTD Series combines a high-integrity semi-rigid outer conductor and PTFE-based dielectric construction for low loss, shielding and durable formed microwave assemblies.
Choose your MTTD cable
Electrical specifications
| Parameter | Unit | MTTD-086 | MTTD-120 | MTTD-141 | MTTD-141L |
|---|---|---|---|---|---|
| OPERATING FREQUENCY | GHz | 50 | 40 | 26.5 | 26.5 |
| IMPEDANCE | Ohm | 50 | 50 | 50 | 50 |
| VELOCITY OF PROPOGATION | % | 76 | 76 | 76 | 82 |
| DIELECTRIC CONSTANT | --- | 1.73 | 1.73 | 1.73 | 1.49 |
| SHIELDING EFFECTIVENESS | dB | > 165 | > 165 | > 165 | > 165 |
| TIME DELAY | nS/m (nS/ft) | 4.38 (1.33) | 4.38 (1.33) | 4.38 (1.33) | 4.06 (1.24) |
| CAPACITANCE | pF/m (pF/ft) | 87.7 (26.7) | 87.7 (26.7) | 87.7 (26.7) | 81.4 (24.8) |
| INDUCTANCE | uH/m (uH/ft) | 0.23 (0.071) | 0.21 (0.063) | 0.22 (0.066) | 0.21 (0.063) |
| CUTOFF FREQUENCY | GHz | 64 | 40 | 36 | 38 |
| WITHSTAND VOLTAGE | DC | 600 | 1000 | 1300 | 1300 |
| PEAK POWER | kW | 2.0 | 2.5 | 4.2 | 4.2 |
Operating frequency and cutoff frequency are different published parameters. Peak-power ratings are not continuous average-power ratings.
Attenuation and power handling
Published model-specific cable-only attenuation values at 25°C, in dB/100 m. Power-handling tabulation follows the source's 40°C ambient, sea-level, VSWR 1.1 reference conditions.
Attenuation comparison graph
Compare cable-only insertion loss across the published frequency range. Lower curves indicate lower loss per 100 m.
Graph uses the published attenuation table values in dB/100 m at 25°C. Curves are comparative references for cable-only loss.
Calculator uses the table value at the selected published frequency: attenuation (dB/100m) × length / 100. Connectors, mismatch and temperature effects are additional.
Show full attenuation tables (dB/100 m)
| GHz | MTTD-086 | MTTD-120 | MTTD-141 | MTTD-141L |
|---|---|---|---|---|
| 0.05 | 12.21 | 7.49 | 6.83 | 6.7 |
| 0.1 | 17.28 | 10.61 | 9.67 | 9.49 |
| 0.5 | 38.8 | 23.89 | 21.78 | 21.37 |
| 1.0 | 55.04 | 33.95 | 30.98 | 30.39 |
| 2.0 | 78.19 | 48.36 | 44.16 | 43.3 |
| 4.0 | 111.27 | 69.08 | 63.14 | 61.88 |
| 6.0 | 136.93 | 85.26 | 77.98 | 76.4 |
| 8.0 | 158.74 | 99.09 | 90.68 | 88.82 |
| 10.0 | 178.1 | 111.4 | 102.01 | 99.89 |
| 12.0 | 195.72 | 122.65 | 112.36 | 110.0 |
| 15.0 | 219.75 | 138.06 | 126.56 | 123.87 |
| 18.0 | 241.65 | 152.17 | 139.56 | 136.56 |
| 24.0 | 280.93 | 177.61 | 163.05 | 159.47 |
| 26.5 | 295.96 | 187.39 | 172.09 | 168.28 |
| 35.0 | 342.81 | 218.04 | — | — |
| 40.0 | 368.0 | 234.62 | — | — |
Show power-handling reference table (kW)
| GHz | MTTD-086 | MTTD-120 | MTTD-141 | MTTD-141L |
|---|---|---|---|---|
| 0.05 | 1.17 | 2.394 | 2.677 | 2.757 |
| 0.1 | 0.827 | 1.69 | 1.889 | 1.946 |
| 0.5 | 0.368 | 0.751 | 0.839 | 0.864 |
| 1.0 | 0.259 | 0.528 | 0.59 | 0.608 |
| 2.0 | 0.183 | 0.371 | 0.414 | 0.427 |
| 4.0 | 0.128 | 0.259 | 0.289 | 0.298 |
| 6.0 | 0.104 | 0.21 | 0.234 | 0.242 |
| 8.0 | 0.09 | 0.181 | 0.201 | 0.208 |
| 10.0 | 0.08 | 0.161 | 0.179 | 0.185 |
| 12.0 | 0.073 | 0.146 | 0.163 | 0.168 |
| 15.0 | 0.065 | 0.13 | 0.144 | 0.149 |
| 18.0 | 0.059 | 0.118 | 0.131 | 0.135 |
| 24.0 | 0.051 | 0.101 | 0.112 | 0.116 |
| 26.5 | 0.048 | 0.096 | 0.106 | 0.11 |
| 35.0 | 0.042 | 0.082 | — | — |
| 40.0 | 0.039 | 0.076 | — | — |
Construction and mechanical data
Construction highlights
- Silver-plated copper centre conductor
- PTFE / low-density PTFE dielectric (model-dependent)
- Semi-rigid outer conductor
- Formed assembly capability
- Precision microwave connectors
Actual layering/material selection is model dependent. Check production drawings for final construction.
Common applications
- Radar and phased-array networks
- Microwave measurement and instrumentation
- Airborne and defence RF modules
- Custom pre-formed cable assemblies
Mechanical, physical and environmental specifications
| Parameter | Unit | MTTD-086 | MTTD-120 | MTTD-141 | MTTD-141L |
|---|---|---|---|---|---|
| CENTER CONDUCTOR | mm (in) | 0.56 (0.022) | 0.91 (0.036) | 0.99 (0.039) | 1.05 (0.041) |
| DIELECTRIC | mm (in) | 1.68 (0.066) | 2.70 (0.106) | 3.00 (0.118) | 3.00 (0.118) |
| OUTER CONDUCTOR | mm (in) | 2.18 (0.086) | 3.05 (0.120) | 3.58 (0.141) | 3.58 (0.141) |
| BEND RADIUS MINIMUM | mm (in) | 7 (0.276) | 10 (0.394) | 20 (0.787) | 12.5 (0.492) |
| WEIGHT | g/m (lbs/ft) | 19 (0.013) | 35 (0.023) | 43 (0.029) | 45 (0.030) |
| TEMPERATURE RANGE | °C (° F) | -65 TO 250 (-85 TO 482) | -65 TO 250 (-85 TO 482) | -65 TO 250 (-85 TO 482) | -65 TO 250 (-85 TO 482) |
Connector choices and ordering
Ask MTT for cable-only lengths or connector-terminated assemblies. Refer to the model-specific connector compatibility tables in the source catalogue; final connector selection, usable frequency, assembly loss and lead time should be confirmed for the requested configuration.
Request datasheet, pricing or samples
Your enquiry includes the MTTD Series title and selected part number.
Enquiries are submitted via FormSubmit to sales@mttinnovation.com (receiver activation required). No automatic datasheet delivery is configured.
Technical FAQs
Does the listed frequency cutoff equal the operating frequency?
No. Use the published operating frequency as the normal model rating; cutoff is a separate cable property.
Does attenuation include connector losses?
No. These are cable-only values. Completed assembly insertion loss additionally depends on connectors and mismatch.
Can I order a custom length or connector?
Yes, submit your proposed configuration for confirmation of compatibility and assembly performance.
MTT® · www.mttinnovation.com · sales@mttinnovation.com · Technical values reproduced from the supplied MTT RF Cable Solutions Word catalogue; subject to validation before contractual use.