Anritsu has introduced the VectorStar series of microwave vector network analysers (VNAs). The MS4640A delivers frequency coverage of 70 kHz to 70 GHz, dynamic range of 103 dB @ 67 GHz, and measurement speed of 20 µs/point for S-parameter measurements on RF, microwave and millimetre wave devices.
          
The VectorStar MS4640A family offers three standard frequency ranges that go to 20 GHz, 40 GHz, and 70 GHz. This 2-port engine is designed to add future capabilities, and is compatible with existing 4-port and broadband mmW systems for 70 kHz to 110 GHz measurements, or waveguide banded measurements up to 500 GHz. The 70 kHz low-end provides seven octaves of additional information below the traditional 10 MHz cut-off of conventional microwave VNAs.

Supplementing the wide dynamic range is the MS4640A’s receiver compression level. The VNA’s receiver has a +10 dBm 0.1 dB compression level at 70 GHz. With the Precision AutoCal for 70 kHz to 40 GHz or 70 GHz calibrations, residual directivity of 42 dB can be achieved at 70 GHz, and up to 50 dB at 20 GHz. This type of unmatched performance allows devices to be more tightly specified with greater confidence.