Title :
Six-port and five-port receivers for UWB and optical communications
Author :
Molina-Fernandez, I. ; Moscoso-Martir, Alvaro ; Avila-Ruiz, Juan Manuel ; Halir, Robert ; Reyes-Iglesias, P. ; Moreno-Pozas, Laureano ; de-Oliva-Rubio, J. ; Ortega-Monux, A.
Author_Institution :
E.T.S.I. Telecomun., Dept. Ing. de Comun., Univ. of Malaga, Malaga, Spain
Abstract :
Some achievements on multiport direct conversion receivers at microwave and optical frequencies are reported. Several sixport junctions with full UWB band (3.1-10.6 GHz) coverage will be presented and compared which, due to their low imbalances, allow to develop a six-port direct conversion receiver with analog I/Q recovery for the complete UWB band. On the optical side, six-port based receivers have found wide acceptance as coherent receivers for 100Gbit/s communications based in QPSK and higher order modulations. Results will be presented showing six-port and five-port, monolithically integrated coherent receivers. Six-port receivers are based in 90° hybrids with analog I/Q recovery, while five-port receivers are based in 120° couplers with digital I/Q regeneration, which can offer superior hardware compensation capabilities.
Keywords :
microwave receivers; optical receivers; quadrature phase shift keying; QPSK; analog I/Q recovery; bit rate 100 Gbit/s; full UWB band; higher order modulations; microwave frequencies; multiport direct conversion receivers; optical communications; optical frequencies; Couplers; Frequency modulation; Junctions; Microwave circuits; Optical distortion; Optical receivers; 90° hybrid; Frequency locked loop (FLL); Ultra-wideband (UWB); coherent optical communications; frequency discriminator; multi-mode interference (MMI) coupler; six-port receiver;
Conference_Titel :
Radar Conference (EuRAD), 2013 European
Conference_Location :
Nuremberg
