title: Cyclic additional optical true time delay for microwave beam steering with spectral filtering.
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.
authors: Z
authors: Z
authors: Cao
authors: R
authors: R
authors: Lu
authors: Q
authors: Q
authors: Wang
authors: N
authors: N
authors: Tessema
authors: Y
authors: Y
authors: Jiao
authors: H P A
authors: HP
authors: van den Boom
authors: E
authors: E
authors: Tangdiongga
authors: A M J
authors: AM
authors: Koonen