Mr. Peter Stenger Profile

Peter Stenger

at Northrop Grumman Systems Corp

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Proceedings Article | 23 April 2020 Paper

W-band wide scanning elemental active DBF line array antenna in low cost PCB

P. Stenger, N. Durland, J. Alderman, M. Storey, A. Johnson-Eusebio, W. Yablon, B. Kim, M. Blue

Proceedings Volume 11411, 1141107 (2020) https://doi.org/10.1117/12.2559473

KEYWORDS: Waveguides, Receivers, Antennas, Commercial off the shelf technology, Interfaces, Extremely high frequency, Tolerancing, Dielectrics, Manufacturing

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A 94 GHz electronic scan radar concept is presented that includes measured results of key 94 GHz hardware technical advancements that are required to bring to fruition a low cost millimeter wave radar front end. Described will be a system concept that uses a line array of 0.61λ spaced receive element radiators at 94 GHz enabling wide scanning digital beam forming and Doppler beam sharpening techniques to be used for high spatial resolution ground and obstacle mapping modes. Key hardware challenges in the area of millimeter wave radiator implementation and receiver front end integration need to be solved in order to bring this low cost millimeter wave solution to fruition. Measured results are presented for the evolutionary development of a batch processed, printed wiring board based W-band radiating element that overcomes the manufacturing tolerance and grid spacing constraints that have prohibited this from being practical in the past with current design and low cost manufacturing methods. The design enables a surface mount W-band MMIC down converter receiver package to be assembled onto the radiator board behind each element to minimize feed losses. Measured beam patterns for a proof of principle 8 element, 0.61λ spacing, waveguide radiator line array that includes surface mounted 94 GHz MMIC down converters in each channel will be presented. Measured 94 GHz results for other fabricated structures across the board will be presented to evaluate performance yield across large PWB board area.

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