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Phase-hologram-based compact RCS test range at 310 GHz for scale models

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3 Author(s)
Lonnqvist, A. ; MilliLab Radio Laboratory, Helsinki University of Technology ; Mallat, J. ; Raisanen, A.V.

A compact radar cross section (RCS) test range based on a phase hologram has been developed for scale-model measurements. The phase hologram converts the feed-horn radiation to a plane wave needed for RCS determination. The measurements are performed at 310 GHz using continuous-wave operation. A monostatic configuration is realized using a dielectric slab as a directional coupler. The main advantage of a scale-model RCS range is that the dimensions of radar targets are scaled down in proportion to the wavelength. Therefore, RCS data of originally large objects can be measured indoors in a controlled environment. Test objects such as metal cylinders and simplified targets have been measured. The feasibility of the phase-hologram RCS range has been verified. The operation and measurement results of the monostatic measurement range are reported here. A comparison with simulated results is also included

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 6 )