How to Characterize Devices to 250 GHz

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Extend Broadband Characterization to 250 GHz

Broadband vector network analyzer measurements use a calibrated test system to capture scattering parameters across microwave, millimeter-wave, and sub-terahertz frequencies. Engineers connect the device under test to a broadband coaxial measurement interface and select the frequency span, ports, stimulus conditions, and calibration method. Depending on the network analyzer configuration, the measurement can begin at 100 kHz or 10 MHz and extend to 250 GHz. The setup uses a network analyzer, a test-set controller, frequency extenders, and a compatible 0.5 mm calibration kit. Two-port configurations characterize single-ended devices; four-port arrangements support differential measurements. Calibration establishes the measurement reference planes before the device response is acquired.

After calibration, the analyzer sweeps the configured frequency range and records the device response as a continuous set of S-parameter traces. Engineers inspect insertion loss, return loss, and transmission or reflection behavior across the frequency span, rather than combining separate waveguide-band measurements. Compact frequency extenders can be placed near the device to shorten the high-frequency connection between the test interface and the device under test. For active devices, a built-in bias tee in the extender supports the required bias connection, subject to the device and test configuration. On-wafer structures, packages, interconnects, amplifiers, and other components can be characterized using an appropriate fixture or probing interface. The measurement workflow retains the same broadband configuration throughout the sweep.

Broadband 250 GHz VNA Characterization Solution

Broadband single-sweep S-parameter characterization requires a calibrated vector network analyzer (VNA), test-set controller, frequency extenders, and a suitable device connection. The solution combines a compatible Keysight PNA or PNA-X analyzer, N5292A test set controller, P9500A frequency extender hub, and NA5307A frequency extenders for measurements extending to 250 GHz. The extender uses a 0.5 mm coaxial test port and can be placed near the device under test to reduce the length of the high-frequency connection. Two-port and four-port configurations support single-ended and differential characterization, respectively. The NA5307A includes a bias tee for active-device testing, and the 85065A precision mechanical calibration kit supports calibration at the broadband interface. This broadband vector network analyzer configuration is intended for millimeter-wave device characterization and S-parameter measurements across microwave through sub-terahertz frequencies.

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See Block Diagram of Broadband 250 GHz VNA Characterization Solution

Explore Products in Our Broadband 250 GHz VNA Characterization Solution

85065A Precision Calibration Kit, DC to 250 GHz, 0.5 mm

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N5292A Millimeter-wave Test Set Controller for PNA/PNA-X Network Analyzer Series, 2- or 4-port

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NA5307A Frequency Extender, 250 GHz

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