title: Wideband RF photonic in-phase and quadrature-phase generation.
abstract: A photonic implementation of a practical broadband RF Hilbert transformer is demonstrated by using a four-tap transversal system. An almost ideal 90 degrees phase shift with less than 3 dB of amplitude ripple has been achieved from 2.4 to 17.6 GHz. An efficient method to realize both transformed (quadrature-phase) and reference (in-phase) signal has been achieved by using a coarse wavelength division multiplexing coupler. Extension of the transformer bandwidth and further improvements of its implementation are discussed.
authors.affiliation: Microelectronics and Materials Technology Center, School of Electrical and Computer Engineering, RMIT University, GPO BOX 2476V, Melbourne, 3001, Victoria, Australia. hossein.emami@rmit.edu.au
authors.forename: Hossein
authors.initials: H
authors.lastname: Emami
authors.forename: Niusha
authors.initials: N
authors.lastname: Sarkhosh
authors.forename: Lam Anh
authors.initials: LA
authors.lastname: Bui
authors.forename: Arnan
authors.initials: A
authors.lastname: Mitchell