Anritsu MS4644A Vector Network Analyzer, 10 MHz – 40 GHz

The Anritsu MS4644A is a 2-port vector network analyzer spanning 10 MHz to 40 GHz, designed for RF, microwave, and millimeter-wave component and system characterization. It combines source, test set, and analyzer in a single platform with real-time measurement display on a front-panel touchscreen or external monitor. The instrument delivers up to 140 dB dynamic range, measurement speeds below 20 µs per point, and input noise floor of −115 dBm at 40 GHz.

It supports up to 100,000 data points with advanced time-domain analysis at 700 kHz frequency step resolution for low-pass mode measurements.

Technical Specifications

• Frequency Range: 10 MHz to 40 GHz


• Ports: 2


• Dynamic Range: Up to 140 dB (maximum); 100 dB typical at 70 GHz


• Measurement Speed: Less than 20 µs per point (fastest swept synthesized); 20 µs per point typical (25,000 points with ALC, display, locking, and correction enabled)


• Output Power: Up to +13 dBm available; standard range +12 dBm to −25 dBm; optional ranges +11 dBm to −25 dBm or +10 dBm to −95 dBm


• Input Noise Floor: −115 dBm at 40 GHz


• Sensitivity: Greater than 80 dB


• Data Resolution: Up to 100,000 points; time-domain analysis at 700 kHz frequency step size (low-pass mode)


• Test Port Directivity, Source Match, Load Match: Up to 50 dB characteristic performance

Key Features

• Single-unit integration of source, test set, and analyzer


• Real-time touchscreen display with external monitor support


• Automatic one-button Precision AutoCal calibration system


• Active device measurements including single and multi-frequency gain compression


• Internal bias tees with two or four step attenuators for extended power range control


• Load-pull capabilities for linear and nonlinear amplifiers


• Swept power and I-V curve analysis software

Typical Applications

• Active device characterization and modeling


• Amplifier design and optimization


• Component S-parameter measurements


• Nonlinear device testing

Compatibility & Integration

• Interfaces: LAN, USB, GPIB, RS232C


• Display: Screen captures exportable in standard graphic formats


• Part of Anritsu VectorStar family platform