Anritsu 37377A Vector Network Analyzer (40 MHz to 50 GHz)

The Anritsu 37377A is a Vector Network Analyzer delivering precision S-parameter measurements from 40 MHz to 50 GHz. Part of the Lightning™ series, this instrument combines advanced microwave and millimeter-wave testing capabilities with extended dynamic range and output power for characterization of active and passive devices. Purpose-built for defense, satellite, radar, and broadband communications applications, the 37377A integrates step attenuators, bias tees, and gain compression measurement capability - all supported by true four-port calibration and flexible two-port configurations via NxN Calibration Utility.

Technical Specifications

• Frequency Range: 40 MHz to 50 GHz


• Instrument Type: Vector, S-Parameter


• Product Line: Lightning™ Series


• Port 1 Step Attenuator: 1-watt, 70 dB (60 dB on >40 GHz models)


• Port 2 Step Attenuator: 40 dB


• Measurement Update Rate: Less than 2 ms per point with full phase-lock and vector-error correction


• Frequency Resolution: 1 Hz (with Option 10A)

Key Features

• S-parameter characterization: S11, S21, S22, S12 measurements


• Insertion loss and return loss calculation


• Gain compression application for active device testing


• Frequency translation measurements for mixers, upconverters, and downconverters using Multiple Source Control and Frequency Offset modes


• Embedding/de-embedding application for fixture characteristic removal


• High RF immunity at +17 dBm for accurate measurements in high-signal environments


• Advanced true four-port calibration or multiple two-port configurations


• Improved dynamic range across passive and active device classes


• Extended power output range


• IEEE 488.2 GPIB bus for remote control and high-speed data transfer


• Standard Ethernet interface

Typical Applications

• Defense and military RF/microwave systems


• Satellite communication component qualification


• Radar subsystem characterization


• Broadband communication device validation


• Active and passive component R&D and manufacturing test

Compatibility & Integration Remote control via GPIB and Ethernet enables integration into automated test environments and production workflows. NxN Calibration Utility supports complex multi-port and frequency-translation device measurements.