The Mini-Circuits ZFBT-4R2GW+ is a 3-port coaxial bias-tee that combines RF signals and DC power on a single transmission line, eliminating the need for separate signal and bias networks. Engineered with rugged shielded construction, this component operates across 0.1 MHz to 4.2 GHz while maintaining 50 Ω impedance and minimal insertion loss.
Technical Specifications
Frequency & Impedance
• Frequency range: 0.1 MHz to 4.2 GHz
• Characteristic impedance: 50 Ω
• VSWR: 1.13:1
Insertion Loss
• 0.1–1 MHz: 0.15 dB typical, 0.8 dB maximum
• 1–2100 MHz: 0.6 dB typical, 1.2 dB maximum
• 2100–4200 MHz: 0.6 dB typical, 1.6 dB maximum
• Overall typical: 0.6 dB
Isolation
• 0.1–1 MHz: 15 dB typical, 25 dB minimum
• 1–2100 MHz: 20 dB typical, 40 dB minimum
• 2100–4200 MHz: 20 dB typical, 50 dB minimum
• Overall typical: 40 dB
Return Loss (RF Port & RF & DC Port)
• 0.1–1 MHz: 12.7 dB typical, 30 dB minimum
• 1–2100 MHz: 17.7 dB typical, 24 dB minimum
• 2100–4200 MHz: 17.7 dB typical, 24 dB minimum
Power & Voltage Specifications
• Maximum RF power: 30 dBm (1 W)
• Maximum DC voltage: 30 V
• Maximum DC current: 0.5 A (500 mA)
• DC resistance (DC to RF & DC port): 4.5 Ω typical
• Guaranteed performance up to 20 dBm RF power and 200 mA DC current
– Key Features
• SMA connectors: RF port (female), RF & DC port (male), DC port (female)
• Operating temperature range: −55°C to +100°C
• Storage temperature range: −55°C to +100°C
• RoHS and REACH compliant
• K18 case style, 0.07 g weight
– Typical Applications
• Amplifier biasing networks
• Laser diode bias injection
• Active antenna power delivery
• SATCOM systems
• DC blocking and return paths
• Test and measurement configurations
– Compatibility & Integration
The ZFBT-4R2GW+ interfaces via standard SMA connectors, enabling straightforward integration into systems requiring simultaneous RF signal and DC bias transmission. Its low insertion loss and high isolation across the ultrawide frequency band minimize signal degradation while preventing RF leakage into the DC supply.
