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LLF series low loss flexible cable

LLF-460,LLF-520,LLF-630

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Featuers&Advantages

• Excellent mechanical phase stability
• Excellent IL stability
• Excellent mechanical strength
• Better bending performance,Durable
• 76%Vp PTFE Tape+SPC Ribbon+Tri-Sheild
• High performance-cost ratio
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Product description

LLF series cables provide a wide range of applications in the current industry, and have very good mechanical phase, attenuation stability, excellent shielding performance and long service life. It is made of low-density PTFE medium and three-layer shielding. It is widely used in aerospace and other military industry units.

Performance parameter

Mechanical Dimensions

Cable Model LLF-460 LLF-520 LLF-630 Material
Center Conductor 1.02  (0.040) 1.30  (0.051) 1.57  (0.062) Silver Plated Copper
Dielectric 2.97   (0.11) 3.75  (0.148) 4.60  (0.181) Microporus PTFE
Shield 3.15  (0.124) 3.95  (0.156) 4.80 (0.189) Shield
Interlayer 3.30 (0.130) 4.10  (0.161) 5.00 (0.197) Metalized Composite Tape
Jacket 3.70  (0.146) 4.50 (0.177) 5.40  (0.213) FEP
Outer sheath 4.50 (0.177) 5.2  (0.205) 6.00 (0.236) Polyperfluoroethylene propylene

Electrical Data

Cable Model Impedance Cable Model Shielding efficiency Permittivity Delay Capacitance Voltage Withstand Peak power Cut-off Frequency
LLF-460 50Ω 76% >100dB 1.73 4.39nS/m 87.7pF/m 1000 DC 2.5 KW 35.4GHz
1.34nS/Ft 26.7pF/Ft
LLF-520 50Ω 76% >100dB 1.73 4.39nS/m 87.7pF/m 1500 DC 5.6 KW 27.84GHz
1.34nS/Ft 26.7pF/Ft
LLF-630 50Ω 76% >100dB 1.73 4.39nS/m 87.7pF/m 2000 DC 10 KW 23.09GHz
1.34nS/Ft 26.7pF/Ft

Mechanical Data

Cable Model Bend Radious:installation Bend Radious:repeated Weight Temp, Operating&Installation
LLF-460 19.1 mm 46 mm 50 g/m -55 +165℃
0.75in in 1.81 in 0.034 lbs/ft -67 +329℉
LLF-520 25.4 mm 52 mm 60 g/m -55 +165℃
1 in 2.05 in 0.04 lbs/ft -67 +329℉
LLF-630 31.8 mm 63 mm 90 g/m -55 +165℃
1.25 in 2.48 in 0.06 lbs/ft -67 +329℉

Attenuation vs. Frequency dB/100m


Frequency (MHz) 50 300 500 1000 2000 4000 6000 10000 12000 16000 18000 26500 K1 K2
LLF-460 7.80  19.22  24.88  35.36  50.35  71.90  88.71  115.85  127.53  148.52  158.14  194.63  1.0994853  0.0005906
LLF-520 6.08  15.01  19.44  27.67  39.47  56.52  69.87  91.53  100.88  117.76  125.51  155.04  0.8562340  0.0005906 
LLF-630 4.86  12.00  15.56  22.18  31.71  45.54  56.43  74.18  81.88  95.81  102.23  0.6827430  0.0005906 

Attenuation at Any Frequency = [ k1 x SQRT (Fmhz)] + [ k2 x Fmhz ]; dB per 100 meter
Power Handling vs. Frequency (Maximum)


Frequency (MHz) 50 300 500 1000 2000 4000 6000 10000 12000 16000 18000 26500
LLF-460 2618 1063 825 580 410 285 233 180 160 148 130 107
LLF-520 3452 1399 1085 760 535 375 306 233 211 188 168 145
LLF-630 4690 1898 1502 1100 793 505 408 312 281 251 228  

Phase Stability(Detection method: one rotation along the repeated bending radius)


Amplitude Stability(Detection method: one rotation along the repeated bending radius)


Phase Change vs Temperature (PPM)


LLF series cable conductor adopts silver-plated copper structure, 76% rate microporous PTFE is used as the dielectric layer, and the outer shield adopts SPC flat silver tape weaving technology + high-temperature aluminum foil intermediate layer + silver-plated copper wire braided three-layer structure. Tuo Microwave™'s excellent production technology and demanding quality pursuit ensure that the cable has excellent mechanical stability, distortion resistance and ultra-long service life, and has a small insertion loss. After years of market practice, Reliable performance, good environmental adaptability (can work stably in the temperature range of +200℃, cable connectors need to meet high temperature requirements); it has been widely used in military, aerospace and other fields. Goto Microwave™ has developed a wide range of RF connectors and cables for this series of cables and combined with market experience, so that the cable components have: high performance, high reliability, and low VSWR characteristics. Standard connectors include: SMA, N, TNC, 3.5mm, 2.92mm and other straight and bent, and provide special performance connectors that meet special requirements. And according to the environment of the cable assembly, various armored cable assembly solutions are provided. For details, please consult Goto Microwave.

Component selection information


LLF series connector selection reference

Connector type Connector code Working frequency (GHz) LLF-460 LLF-520 LLF-630 Typical standing wave
3.5mm Male 35M 26.5 TS-35MS480-01     1.25
Female 35F TS-35FS480-01     1.25
SMA Male SM 26.5 TS-SM460-01 TS-SM520-02   1.25
18     TS-SM630-01 1.2
Male-RA SM(RA) TS-SM460-RA-01 TS-SM520-RA-01   1.25
Female SF TS-SF460-01 TS-SF520-01   1.2
N Male NM 18 TS-NM460-01 TS-NM520-01 TS-NM630-01 1.2
Male-RA NM(RA) TS-NM460-RA-01 TS-NM520-RA-01   1.25
Female NF TS-NF460-01 TS-NF520-01   1.25
TNC Male TM 18 TS-TM460-01 TS-TM520-01 TS-TM630-01 1.25
Female TF 11 TS-TF460-01     1.25

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