An interferometric radar consists of one transmitting antenna and two nominally identical receiving antennas spaced by a baseline for observing targets at a distance. An example of using SDR 2400AD2 as an interferometric radarfor simultaneous measurement of radial and transversal velocities is shown in the figure below.

 

– An example of using SDR 2400AD2 as an interferometric radar.

 

Dr. Xiangrong Wang and her research team of BUAA, China, used the interferometric radar to measure angular velocity of rotating blades. Based on any linear velocity vector of a moving object can be decomposed into the radial velocity vector and the transversal velocity vector.However, thetransversal velocitycannot be directly measured by a monostatic Doppler radar. Thus, a technique that measures the transversal velocity uses an interferometric radar has been proposed. Ancortek SDR-KIT 2400AD2 has two receiving channels and can be used as an interferometric radar.

 

Reference: Xiangrong Wang, et al., “Simultaneous measurement of radial and transversal velocities using interferometric radar,” IEEE Transaction on Aerospace and Electronic Systems, Early Access Article. DOI: 10. 1109/TAES.2019.2959897, 18 December 2019.

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