When board space is measured in millimeters and frequencies push past 20 GHz, RG405 M17/133 delivers where flexible cables cannot go. This 0.086 inch semi-rigid coaxial cable packs mil-spec microwave performance into a 2.2mm diameter copper tube, making it the go-to choice for dense phased arrays, compact test fixtures, and satellite payloads where every millimeter matters. The seamless copper outer conductor acts as both shield and structural element, maintaining precise 50 Ohm geometry through 20 GHz while protecting the 1/0.51mm SCCS center conductor from mechanical stress. Engineers specify RG405 when they need predictable phase length in temperature-cycling environments and cannot tolerate the signal leakage inherent in braided constructions.
| Item | Material | Diameters (mm) |
|---|---|---|
| Inner Conductor | SCCS | 1/0.51 |
| Insulation | PTFE | 1.68 |
| Outer Conductor | BC Tube | 2.20 |
| Capacitance (pF/m) | 95 |
|---|---|
| Impedance (Ohms) | 50 |
| Velocity of Propagation (%) | 69.5 |
| Max Voltage (Vrms) | 1500 |
| Max Frequency (MHz) | 20000 |
| Bend Radius (mm) | 8 |
| Temperature Range (℃) | -55~+125 |
| Frequency (GHz) | Attenuation (dB/m) | Power(watts CW) |
|---|---|---|
| 0.5 | 0.45 | 232 |
| 1.0 | 0.64 | 162 |
| 5.0 | 1.51 | 69 |
| 10.0 | 2.22 | 47 |
| 20.0 | 3.29 | 32 |
Q: What is the M17 designation for RG405?
A: M17/133 is the official MIL-DTL-17 part number.
Q: What is the maximum frequency for this RG405 cable?
A: 20 GHz (20,000 MHz) as specified in the M17/133 documentation.
Q: What is the outer diameter?
A: 2.2mm (0.085-0.086 inches), the industry standard for this class of semi-rigid cable.
Q: What type of conductor does RG405 use?
A: 1/0.51mm solid silver-plated copper-covered steel (SCCS).
Q: What is the temperature range?
A: -55°C to +125°C.
Q: What is the voltage rating?
A: 1500V RMS.
Q: What is the capacitance?
A: 95 pF/m.
Q: What is the minimum bend radius?
A: 8mm for static installation. Semi-rigid cables are designed to be formed once; repeated bending can cause work hardening and cracks.
Q: What connectors are compatible with RG405?
A: SMA, 2.92mm (K), 3.5mm, and other precision connectors designed for 0.086 inch semi-rigid cable. Connectors are typically soldered or clamped to the copper tube.
Q: What is the difference between RG402 and RG405?
A: RG402 has 3.58mm (0.141") diameter, while RG405 has 2.2mm (0.086") diameter. RG405 is smaller and lighter for space-constrained applications, with the same 20 GHz frequency rating.
Q: Can RG405 be hand-formed?
A: While possible, specialized forming tools are recommended to prevent kinking or deformation that affects electrical performance.
Q: Do you offer custom lengths?
A: Yes, we are a RF coaxial cable manufacturer, accept OEM & ODM, RG405 is available in straight lengths cut to your specification. Pre-formed custom shapes and connectorized assemblies can be manufactured to your requirements.