Modules improve VNA efficiency -

Modules improve VNA efficiency


European Microwave Week: Anritsu Company demonstrated the modules developed for the ME7838A broadband vector network analyzer (VNA) system that provides single-sweep coverage from 70 kHz to 110 GHz with operation from 40 kHz to 125 GHz.

It uses a design that eliminates the need for large, heavy millimeter wave (mmWave) modules and coax combiners. Measurement is made in the module and the data transmitted to the analyzer for interpretation.

With the ME7838A design, mmWave modules can be mounted close to or directly on the wafer probe. This advantage, as well as the fact that the ME7838A transitions at 54 GHz, gives the broadband VNA the widest dynamic range in its class – 107 dB at 110 GHz and 92 dB at 125 GHz. It uses GaAs devices manufactured in Anritsu's own fab in Japan.

The ME7838A VNA provides good raw directivity throughout the entire frequency range, due to its design and elimination of the MUX combiners used in traditional systems. Calibration and consistent measurement stability is 0.1 dB magnitude and 0.5 degree phase across the entire 70 kHz to 110 GHz frequency range over a 24-hour period. Measurement speed is 55 ms for 201 points at 10 kHz IF bandwidth, 10 times faster than comparable broadband VNA systems.

The ME7838A provides engineers, designers, and researchers with a system that conducts accurate and efficient broadband device characterization of active and passive microwave/mmWave devices, including those designed into emerging 60 GHz wireless personal area networks (WPANs), 40 Gbps and higher optical networks, 77 and 94 GHz automotive radar, digital radio links, 94 GHz imaging mmWave radar, and Ka-Band satellite communications.

The ME7838A is suited for conducting signal integrity measurements on emerging high-speed designs, such as 28 Gbps serializer/deserializer (SerDes) transceivers used on servers, routers and other networking, computing and storage products. The ME7838A, equipped with the 3743A mmWave module, can accurately measure 28 Gbps SerDes transceivers at the higher frequencies required for proper analysis.

A real-time power leveling control provides power levels as low as -55 dBm.

The design of the ME7838A provides users with configuration advantages, as well. Its use of smaller, lighter RF and mmWave modules reduces the need for large bulky positioners that add expense.

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