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

Leimeng Zhuang, Chris G.H. Roeloffzen, Arjan Meijerink, Maurizio Burla, David A.I. Marpaung, Arne Leinse, Marcel Hoekman, René G. 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 languageEnglish
    Pages (from-to)19-31
    Number of pages13
    JournalJournal of lightwave technology
    Issue number1
    Publication statusPublished - 2010


    • CMOS-compatible optical waveguide technology
    • Optical beamforming
    • Optical ring resonators
    • Phased array antennas
    • Photonic integration
    • RF photonics

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