On Sept 29, 2023, IFT patent “Hidden chamber detector” has been granted. US Patent # is 11770160. The inventor includes X Lin, G Chen, K Pham, E Blasch, Z. Wang. The hidden chamber detector includes a LFMCW radar, SAR imaging processor, and TDMA MIMO antenna array. The radar transmits and receives signals, converts echoes to baseband, and sends samples to the SAR processor. The SAR processor utilizes the samples and antenna array details to create an SAR image.