The HP/Agilent 85020B is a 75 Ohm RF directional bridge engineered for scalar reflection and transmission measurements in RF and microwave test systems. It operates from 10 MHz to 2.4 GHz and integrates with scalar network analyzers, sweep oscillators, and synthesized sweepers via Type-N female connectors. The bridge incorporates a zero-biased Schottky diode detector and delivers 40 dB directivity across its frequency range, making it suitable for return loss characterization and impedance analysis in demanding measurement environments.
Technical Specifications
• Nominal Impedance: 75 Ohms
• Frequency Range: 10 MHz to 2.4 GHz
• Connectors: Type-N (Female)
• Maximum Input Power: +23 dBm
• Directivity: 40 dB (0.01 to 2.4 GHz)
• Insertion Loss: Typically less than 1.2 dB across specified frequency range
– Key Features
• Zero-biased Schottky diode detector for return loss sampling
• Dual operating modes: AC (modulated RF) for noise environments and DC (unmodulated RF) for modulation-sensitive applications
• High directivity minimizes measurement uncertainty and enables accurate reflection characterization
• Optimized for 75 Ohm system impedance
– Typical Applications
• Return loss and reflection coefficient measurements
• Ratio measurements when combined with power splitters and detectors
• Scalar network analysis across industrial, aerospace, and telecommunications frequency bands
• Component characterization in 75 Ohm RF systems
– Compatibility & Integration
The 85020B pairs with HP/Agilent scalar network analyzers (8757, 8756, and 8755 series), sweep oscillators (8350 series with RF plug-ins), and synthesized sweepers. Detector support includes HP 11664 and 85025 series units. Power splitter integration via HP 11667 series enables extended measurement capability. System verification is available through the HP 85023D 75 Ohm verification set.
