W-Band Sparse Synthetic Aperture for Computational Imaging

• DOI: 10.1364/aoms.2015.jt5a.17
• Publication Date: 2015-06-08T11:27:33Z
• Authors: Suresh Venkatesh; Naren Viswanathan; David Schurig
• Keywords: Aperture (computer memory)

We present a sparse synthetic aperture system at W-Band (75 – 110 GHz) using sub-harmonic mixer modules. The active consists of scanned transmitter module, fixed receiver module and vector network analyzer as the back end. For this we construct complete analytical forward model solve inverse problem to reconstruct scene least squares technique. demonstrate standoff diffraction limited imaging 2D 3D targets achieve cross range resolution 3 mm depth 4 respectively. Furthermore, also show that positions can be further optimized finely gridded scattered electric field information from specific target. This optimization technique helps reduce number measurements significantly by above certain threshold SNR for reconstruction.