Motivation: mobile platform based electronically scanned phased array system for satellite communications

Phased array system for satellite communications requires low cost, high spatial resolution, high gain, low noise figure, and low sidelobes. 

Led a research group with over 10 undergraduate and graduate students on developing an electronically scanned phased array system funded by Air Force Research Lab (AFRL) and OverHorizon, Inc. Designed, modeled, fabricated and measured Ku-band Rx/Tx arrays and RF circuit system. Led on building an anechoic chamber at BYU for the scanned array pattern measurement. The proposed novel array layout design helps to largely reduce the cost of the overall system and simplify the design and fabrication processes. Several lectures were given for training less-experienced undergraduate and graduate students. 

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Technology: aperiodic array with rotated tiles for low-cost design

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Random array for grating lobe mitigation principle

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Comparison of aperiodic array and rotated tiles array used in this project

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The radiation pattern for a steered beam with one wavelength element spacing

Representative Journal Publications:

  1. J. Diao, J. W. Kunzler, and K. F. Warnick. “Sidelobe level estimation and efficiency optimization for wide scanned tiled aperiodic array antennas.” IEEE Trans. Antennas Propag., vol. 65, no. 12, pp. 7083-7090, Dec. 2017.