Cyclic additional optical true time delay for microwave beam steering with spectral filtering

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Abstract

Optical true time delay (OTTD) is an attractive way to realize microwave beam steering (MBS) due to its inherent features of broadband, low-loss, and compactness. In this Letter, we propose a novel OTTD approach named cyclic additional optical true time delay (CAO-TTD). It applies additional integer delays of the microwave carrier frequency to achieve spectral filtering but without disturbing the spatial filtering (beam steering). Based on such concept, a broadband MBS scheme for high-capacity wireless communication is proposed, which allows the tuning of both spectral filtering and spatial filtering. The experimental results match well with the theoretical analysis
Original languageEnglish
Pages (from-to)3402-3405
Number of pages4
JournalOptics Letters
Volume39
Issue number12
DOIs
Publication statusPublished - 2014

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