Novel ring resonator-based integrated photonic beamformer for broadband phased array receive antennas - part 2: experimental prototype

L. Zhuang, C.G.H. Roeloffzen, Arjan Meijerink, M. Burla, D.A.I. Marpaung, Arne Leinse, M. Hoekman, Rene Heideman, Wim van Etten

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    An experimental prototype is presented that illustrates the implementation aspects and feasibility of the novel ring resonator-based optical beamformer concept that has been developed and analyzed in Part I of this paper . This concept can be used for seamless control of the reception angle in broadband wireless receivers employing a large phased array antenna (PAA). The design, fabrication, and characterization of a dedicated chip are described, in which an 8$\times$1 optical beamforming network, an optical sideband filter for single-sideband suppressed carrier modulation, and a carrier re-insertion coupler for balanced optical detection are integrated. The chip was designed for satellite television reception using a broadband PAA, and was realized in a low-loss, CMOS-compatible optical waveguide technology. Tuning is performed thermo-optically, with a switching time of 1 ms. Group delay response and power response measurements show the correct operation of the OBFN and OSBF, respectively. Measurements on a complete beamformer prototype (including the electro-optical and opto-electrical conversions) demonstrate an optical sideband suppression of 25 dB, RF-to-RF delay generation up to 0.63 ns with a phase accuracy better than $\pi$/10 radians, and coherent combining of four RF input signals, all in a frequency range of 1–2 GHz.
    Original languageUndefined
    Pages (from-to)19-31
    Number of pages13
    JournalJournal of lightwave technology
    Issue number1
    Publication statusPublished - 1 Jan 2010


    • EWI-17141
    • METIS-279103
    • IR-69426

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