Publications by authors named "Ali Khalatpour"
We present a terahertz spatial filter consisting of two back-to-back (B2B) mounted elliptical silicon lenses and an opening aperture defined on a thin gold layer between the lenses. The beam filtering efficiency of the B2B lens system is investigated by simulation and experiment. Using a unidirectional antenna coupled 3rd-order distributed feedback (DFB) quantum cascade laser (QCL) at 3.
View Article and Find Full Text PDFLarge heterodyne receiver arrays (~100 pixel) allow astronomical instrumentations to map more area within limited space mission lifetime. One challenge is to generate multiple local oscillator (LO) beams. Here, we succeeded in generating 81 beams at 3.
View Article and Find Full Text PDFThree-dimensional near-field microwave holography for tissue imaging.
Int J Biomed Imaging
August 2012
Article Synopsis
- The paper discusses advancements in a microwave imaging system that focuses on tissue imaging using near-field holographic techniques.
- The setup features two aligned TEM horn antennas that perform a rectangular scan, acquiring wideband data without the need for liquid coupling.
- New imaging algorithms leverage numerical simulations to derive the incident field and Green's function, improving accuracy while removing the need for optimization-based deblurring techniques.