Virginia Diodes

Charlottesville, VA 22902-6172


About Virginia Diodes

VDI manufactures state-of-the-art test and measurement equipment for mmWave and THz applications, including vector network analyzer, spectrum analyzer, and signal generator extension modules.


979 Second Street, S.E.
Suite 309
Charlottesville, VA 22902-6172

More Info on Virginia Diodes

VDI manufactures state-of-the-art test and measurement equipment for mm-wave and THz applications. These products include Vector Network Analyzer, Spectrum Analyzer and Signal Generator Extension Modules that extend the capability of high performance microwave measurement tools to higher frequencies. VDI's component products include detectors, mixers, frequency multipliers and custom systems for reliable operation at frequencies between 50 GHz and 2 THz. All VDI components include in-house fabricated GaAs Schottky diodes and microelectronic filter structures.

VDI was founded in 1996 by Dr. Thomas W. Crowe, VDI CEO & President. From 1996 to 2001 VDI sold only Schottky Diodes for scientific applications including radio astronomy and high frequency radar. During this period, VDI operated as a University of Virginia (UVa) spin-off and utilized the facilities at the University. Around 2001 VDI expanded to include offices in downtown Charlottesville, VA and started selling complete mixer, detector and multiplier products for 50-1000 GHz operation. By 2004 VDI started selling sub-systems such as THz Transmitter & Receiver modules. Also in 2004 all VDI operations moved to the 979 Second Street location in Charlottesville and VDI stopped utilizing UVa facilities. Since then VDI continued to grow the number of product offerings and employees needed to satisfy a broad range of terahertz and millimeter wave customers. Today, VDI employs over 50 engineers, technicians and administrative staff working in a high tech 20,000 sq. ft. facility.

Articles & News

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RF/mmWave Filters Simplify Spectrum Management

May 1, 2023
There’s no underestimating the importance of filtering in RF system design. This report contains the latest innovations in the art of RF filtering and spectrum management.
Keysight Technologies
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Test & Measurement

170-GHz/220-GHz Broadband VNA Built for On-Wafer Characterization

May 26, 2022
Keysight's VNA solution, developed in collaboration with three other companies, efficiently characterizes on-wafer devices and circuits, speeding deployment of 5G/6G MMICs.
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Ims Conference Overview Promo

IMS 2021 Delivers A Deep and Varied Live Technical Program

May 31, 2021
There's many reasons to attend IMS 2021's live event in Atlanta, not the least of which is the juicy smorgasbord of technical sessions on offer. This article glimpses just a few...
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Industry Insights

Where Will Tomorrow’s Technology Take Us?

Nov. 4, 2019
Wireless technology has become a dominant force in our everyday lives, yet some are looking way ahead with the hope of pushing the envelope further to create tomorrow’s communications...
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Test & Measurement

Looking Way Ahead to 6G

Oct. 23, 2019
While 5G represents the next generation of wireless communications, a new sub-terahertz testbed is already setting the stage for 6G research.
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Test & Measurement

Tackling Extreme Bandwidths for Emerging mmWave Applications

July 19, 2019
Multiple factors should be weighed when designing and testing hardware for 5G and 802.11ay. A mmWave simulation case study, along with the use of a wideband R&D mmWave test bed...

Videos & Resources

Products of the Week

Products of the Week: April 17, 2023

April 17, 2023
Here's this week's selection of some of the most interesting new products that have been launched of late.

All content from Virginia Diodes

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The 2019 IMS Exhibition Brings High Expectations

May 14, 2019
During a time when defense electronics technology is strong, the industry readies itself for the global adoption of 5G and electronically steered vehicles.
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Waveguide Filters Sort Millimeter-Wave Signals

Jan. 30, 2019
These rugged rectangular waveguide filters provide low-loss passbands from 27 to 86 GHz for a growing number of applications at mmWave frequencies.
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Submillimeter-Wave PA MMICs Stack FETs to Shrink Size

July 6, 2018
A pair of MMIC amplifiers leverage stacked-FET architectures to achieve high gain and high saturated output power at the upper limits of the mmWave frequency range.
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WR-3 Bandpass Filters Cover 220 to 325 GHz

Jan. 30, 2018
Two different fabrication approaches were compared for the formation of WR-3 waveguide bandpass filters.
(Image courtesy of Christopher Sebela, Creative Commons).
Test & Measurement

Network Analyzer to Measure Terahertz Signals

Oct. 6, 2016
Keysight Technologies said that it had developed a 1.5 THz network analyzer for researchers at the Chalmers University of Technology in Sweden.
Active components

Smaller Synthesizers Strive for Greater Stability

Aug. 25, 2016
Frequency synthesizers continue to integrate more functionality into ever-smaller packages with lower power consumption.
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Terahertz Receiver Array Scans the Stars

June 1, 2016
A dual-receiver system was developed for scanning terahertz frequencies on board the SOFIA stratospheric space observatory.
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Active components

MM-Wave Products Enable the Next Frontier

Jan. 6, 2016
Millimeter-wave technology has become more widespread, as evidenced by the large number of higher-frequency products available today. With 5G on its way, millimeter-wave bands...
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Count on Diodes to Drive Performance

Nov. 24, 2015
The performance of RF/microwave systems depends on the performance of the diodes that are incorporated into the system. These devices are available in many shapes and sizes, providing...