Simple Approach to Measure Angle of Arrival of a Microwave Signal

Hao Chen, Erwin H.W. Chan

    Research output: Contribution to journalArticlepeer-review


    A new photonics-based microwave angle of arrival (AOA) measurement system is presented. It is based on a single-laser, single dual-drive Mach Zehnder modulator (DDMZM) and single-photodetector structure. The AOA of a microwave signal can be determined by simply measuring the system output DC voltage. The proposed system is suitable for determining the AOA of a microwave signal with a single frequency or a band of frequencies, and has a wide AOA measurement range. Experimental results are presented that demonstrate an AOA measurement range of 0° to 76.8° and 12.6° to 90° without and with introducing a time delay to one of the DDMZM input RF ports respectively, and measurement errors of less than 2°. Results also demonstrate an AOA measurement for a pseudorandom binary sequence signal upconverted into a microwave frequency.

    Original languageEnglish
    Article number8871110
    Pages (from-to)1795-1798
    Number of pages4
    JournalIEEE Photonics Technology Letters
    Issue number22
    Publication statusPublished - 15 Nov 2019


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