Millimeter-Wave Holographic Imaging System for Radiating Array Assay and Adjustment

摘要

This is a final report on equipment purchased under the subject Defense University Research Instrument Program (DURIP) Grant. The grant involved equipment purchase only, and several items were combined into a single one-of-a- kind system. The following paragraphs provide a summary of the items purchased and a brief description of the custom antenna scanning facility assembled from the specific item of a Cascade Probe Station. Items Purchased: Receiver System; Distributed Down converter; Synthesizer -20 Gz. 1 Opt. H-62; Power Amp (source side) I; mmW. Heads; mmW. Heads; mmW Interface; Sweeper Chassis (for LO source) 12-20 GHz. Plug-inl Opt. K69; Custom Cascade Probe Station 2; Monitor for Control Computer on Cascade System. The First nine items comprise an integrated receiving system. Item 10 is a high precision position controller designed for use in on-wafer testing of integrated circuits. We purchased this system with several items of the test platform deleted and have refitted it as a programmable x-y positioner for high-precision near-field scanning of millimeter wave apertures. One can identify a rectangular waveguide oriented vertically. This is the scanning probe. The positioning mechanism of the Cascade Probe Station can be seen below. The antenna under test is positioned above the waveguide and a few wavelengths away, It radiates down toward the waveguide. The system is fully assembled and we have developed software in house to control the system and to perform and scan-plane-to-radiating-aperture field transformations. Operation of the RF systems has been verified in all bands of operation.