The Anritsu 87A50-1 is a precision SWR bridge designed for return loss and standing wave ratio measurements across RF test systems. It delivers high directivity and phase-coherent signal transmission, enabling accurate reflection coefficient measurement and network analyzer integration from 2 to 18 GHz.
Technical Specifications
Frequency Range: 2 to 18 GHz
Directivity: 38 dB
Insertion Loss: 6.5 dB nominal
Maximum Input Power: 0.5 W
Test Port Connector: GPC-7
Input/Output Connectors: Type N (female)
Measurement Accuracy: Reflection coefficient-dependent per frequency band:
• 2–3 GHz: ±(0.013 + 0.32p²)
• 3–4 GHz: ±(0.013 + 0.23p²)
• 4–18 GHz: ±(0.013 + 0.15p²)
where p is the measured reflection coefficient.
Physical Dimensions: 7.3 × 5.2 × 2.9 cm (excluding connectors); 340 g
– Key Features
• Built-in reference termination for direct SWR and return loss measurement
• Phase and amplitude preservation of reflected signals for accurate phase comparisons
• 38 dB directivity enables low-level signal measurement with RF output amplification prior to detection
• Dual Type N connectors ensure standard RF cabling compatibility
• GPC-7 test port accommodates precision components under test
– Typical Applications
• Component characterization: amplifiers, directional couplers, attenuators, filters, splitters, terminations
• System and sub-system performance verification
• Distance to Fault (DTF) measurements in cable and antenna installations
• Network analyzer-integrated reflection measurements
• Low-level SWR and return loss verification in field service scenarios
– Compatibility & Integration
The 87A50-1 integrates into Anritsu RF test platforms including Site Master™, Cell Master™, and VNA Master™ handheld instruments. Type N connectors and GPC-7 test port design provide broad compatibility with standard RF instrumentation and measurement systems requiring precision reflection characterization.
