Abstract

We discuss the use of focused near-field (NF) distributions to irradiate the object of interest in NF microwave imaging. This is pursued with the aim of suppressing the effect of undesired scatterers, which could then lead to the use of simpler inversion algorithms dealing with fewer unknowns. To this end, we investigate the use of an existing NF plate, which is capable of focusing the NF distribution to a subwavelength line (one-dimensional) focus. Similarly, we investigate the same concept, i.e., suppressing the effect of undesired scatterers, using an existing Bessel beam launcher to create a confined NF distribution in free space.

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