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. Y. Kim; M. Blue

doi:10.1117/12.2559473

23 April 2020 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. Y. Kim, M. Blue

Proceedings Volume 11411, Passive and Active Millimeter-Wave Imaging XXIII; 1141107 (2020) https://doi.org/10.1117/12.2559473
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

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.

Citation Download Citation

P. Stenger, N. Durland, J. Alderman, M. Storey, A. Johnson-Eusebio, W. Yablon, B. Y. Kim, and M. Blue "W-band wide scanning elemental active DBF line array antenna in low cost PCB", Proc. SPIE 11411, Passive and Active Millimeter-Wave Imaging XXIII, 1141107 (23 April 2020); https://doi.org/10.1117/12.2559473

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KEYWORDS

Waveguides

Receivers

Antennas

Commercial off the shelf technology

Interfaces

Extremely high frequency

Dielectrics

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