A new prototype of a tomographic system for microwave imaging is presented in this paper.\nThe target being tested is surrounded by an ad-hoc 3D-printed structure, which supports sixteen custom\nantenna elements. The transmission measurements between each pair of antennas are acquired through\na vector network analyzer connected to a modular switching matrix. The collected data are inverted\nby a hybrid nonlinear procedure combining qualitative and quantitative reconstruction algorithms.\nPreliminary experimental results, showing the capabilities of the developed system, are reported.
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