Wideband RF photonic in-phase and quadrature-phase generation.
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.
Emami
Hossein
H
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
Sarkhosh
Niusha
N
Bui
Lam Anh
LA
Mitchell
Arnan
A