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- LLS (Low Loss Spiral Shield)
LLS (Low Loss Spiral Shield)
LLS (Low Loss Spiral Shield)
- Center Conductor: Solid or stranded silver plated copper.
- Dielectric: Expanded PTFE tape.
- Inner Shield: Spiral strip of silver plated copper.
- Outer Braid: Round silver plated copper.
- Jacket: Blue translucent FEP.
| Variant | Center Conductor Diameter | Dielectric Diameter | Diameter Over Inner Shield | Diameter Over Outer Braid | Overall Diameter | Weight (lbs/mft) | Bend Radius |
|---|---|---|---|---|---|---|---|
| LLS160-40GHZ | 0.0403" solid | 0.111" | 0.117" | 0.135" | 0.160" | 24.5 | 0.8" |
| LLS195STR | 0.057" stranded | 0.147" | 0.153" | 0.171" | 0.195" | 35.8 | 1.0" |
| LLS195 | 0.051" solid | 0.145" | 0.151" | 0.169" | 0.195" | 36.0 | 1.0" |
| LLS220 | 0.064" solid | 0.174" | 0.180" | 0.201" | 0.220" | 44 | 1.1" |
| LLS290 | 0.089" solid | 0.241" | 0.247" | 0.273" | 0.290" | 74.0 | 1.45" |
- Operating Temperature: -55 to +200°C.
- Velocity of Propagation: 81%-85%.
- Impedance: 50 Ohms.
- Shielding Effectiveness: <-110 dB.
| Frequency (MHz) | LLS160-40GHZ | LLS195STR | LLS195 | LLS220 | LLS290 |
|---|---|---|---|---|---|
| 400 | 6.3 | 5.0 | 4.7 | 3.9 | 2.7 |
| 1,000 | 10.0 | 7.9 | 7.5 | 6.2 | 4.3 |
| 3,000 | 17.7 | 14.1 | 13.2 | 10.9 | 7.7 |
| 5,000 | 23.1 | 18.5 | 17.2 | 14.3 | 10.1 |
| 10,000 | 33.4 | 26.9 | 24.9 | 20.7 | 14.8 |
| 18,000 | 46.0 | 37.3 | 34.2 | 28.5 | 20.6 |
| 40,000 | 71.8 | -- | -- | -- | -- |
- Designed for low attenuation with a unique inner silver plated flat strip shield and expanded PTFE tape dielectrics.
- Smaller and lighter than comparable constructions.
- Improved return loss by minimizing spikes from strip braid and interlayer.
- Special connectors are available.
Attenuation can be calculated using K1 and K2 factors, considering the type, strand factor, diameter of the center conductor, impedance, velocity of propagation, and dissipation factor of the dielectric.
Formula: Attenuation (dB/100 ft) at any frequency (MHz) = (K1 x √frequency) + (K2 x frequency)
| Variant | K1 | K2 |
|---|---|---|
| LLS160-40GHz | 0.309 | 0.0002500 |
| LLS195STR | 0.243 | 0.0002600 |
| LLS195 | 0.231 | 0.0001785 |
| LLS220 | 0.19 | 0.000168 |
| LLS290 | 0.131 | 0.0001674 |
Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311 • www.harbourind.com
Catalog excerpts
LLS (Low Loss Spiral Shield) Coaxial Cable -solid or stranded center conductors Construction: Center Conductor: Solid or standed silver plated copper Dielectric: Expanded PTFE tape Inner Shield: Spiral strip of silver plated copper Outer Braid: Round silver plated copper Jacket: Blue translucent FEP Operating temperature -55 +200° C Velocity of Propagation 81%-85% Impedance 50 Ohms Shielding Effectiveness <-110 dB LLS160-40GHZ LLS195STR Center conductor diameter Dielectric diameter Diameter over inner shield Diameter over outer braid Overall diameter Weight(lbs/mft) Bend radius Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311 www.harb
Open the catalog to page 1
LLS (Low Loss Spiral Shield) Coaxial Cable -solid or stranded center conductors Designed for Low Attenuation The inner silver plated flat strip shield coupled with higher velocity expanded PTFE tape dielectrics yield lower attenuation levels over operating frequencies. LLS cables are smaller and lighter weight than comparable LL flat strip braid constructions. Return loss improved by minimizing inherent spikes from the strip braid and interlayer. Shielding Effectiveness levels have been measured at <-110 dB Special connectors have been designed and are readily available. Attenuation Calculation...
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