MegaPhase KBx/KB50 Series: 50 GHz Precision RF Cables
The MegaPhase KBx and KB50 "Killer Bee" Series are high-performance, 50 GHz precision RF test cables designed for demanding laboratory and production environments. These cables offer exceptional phase and amplitude stability, making them the industry standard for high-frequency testing, including Ka-band applications and VNA measurements.
Product Line: KBx Series (KB4x/KB8x/KB18x/KB26x/KB34x) & KB50 Series (KB40)
Maximum Frequency: 50 GHz
1. Key Features
✅ Phase & Amplitude Stability – Optimized for high-frequency testing, including Ka-band and below.
✅ Low Loss & Low VSWR – 50Ω nominal impedance; VSWR ≤1.55 at 50 GHz.
✅ Armored & Durable – Crush-resistant design (250 lbs/linear inch / 44.6 kg/cm).
✅ Ultra-Flexible & Wide-Temp Range –
Bending radius: KBx (1.75 in), KB50 (1.5 in).
Operating Temp: -55°C to +135°C.
2. Electrical Specifications
| Parameter | KBx Series | KB50 Series |
| Propagation Speed | 84% speed of light | 80% speed of light |
| Time Delay | 1.21 ns/ft (3.97 ns/m) | 1.27 ns/ft (4.17 ns/m) |
| Shielding | ≥-100 dB (cable only) | Same as KBx Series |
| Voltage Rating | 7.0 kV @60 Hz | 1.2 kV @60 Hz |
| Capacitance | 24.0 pF/ft (78.7 pF/m) | 25.4 pF/ft (83.3 pF/m) |
3. Mechanical Specifications
| Parameter | KBx Series | KB50 Series |
| Outer Diameter | 0.360 in (9.14 mm) | 0.315 in (8.0 mm) |
| Weight | 0.05 lbs/ft (0.67 kg/m) | 0.04 lbs/ft (0.060 kg/m) |
| Max Length | 25 ft (8 m) | 40 ft (12 m) |
4. Attenuation vs. Frequency
KBx Series:
0.3 GHz: 0.060 dB/ft
50 GHz: 1.743 dB/ft
KB50 Series:
0.3 GHz: 0.104 dB/ft
50 GHz: 5.719 dB/m (~1.743 dB/ft)
VSWR Trend:
Low freq (<10 GHz): ≤1.10
High freq (50 GHz): ≤1.55
5. Connector Options
KBx Series: SMA, N-Type, TNC, 3.5mm, 2.92mm
KB50 Series: 2.4mm (optimized for mmWave)
6. Applications
Lab Testing – VNA, RF signal analyzers, precision measurements.
Production Testing – RF component validation.
Harsh Environments – High-temp, tight bends, long-term reliability.
7. Performance Charts (Summary)
Phase Stability – Minimal drift across temperature (-55°C to +135°C).
Power Handling – KB32x™ CW power capacity at 25°C.
Attenuation and Performance Table (50 GHz)
The following data highlights the attenuation (insertion loss) across common frequency bands including UHF, L, S, C, X, Ku, K, and Ka-band.
Core provides MegaPhase RF/microwave and test cables，If you need to know more about and purchase MegaPhase products, you can consult CORE customer service or fill out the RFQ.
