Six-port and five-port receivers for UWB and optical communications

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.

[1]  G. G. Mekonnen,et al.  Athermal InP-based 90°-hybrid Rx OEICs with pin-PDs >60 GHz for coherent DP-QPSK photoreceivers , 2010, 2010 22nd International Conference on Indium Phosphide and Related Materials (IPRM).

[2]  Ke Wu,et al.  A six-port direct digital millimeter wave receiver , 1994, Proceedings of IEEE National Telesystems Conference - NTC '94.

[3]  Pablo Perez-Lara,et al.  Broadband Five-Port Direct Receiver Based on Low-Pass and High-Pass Phase Shifters , 2010, IEEE Transactions on Microwave Theory and Techniques.

[4]  P J Reyes-Iglesias,et al.  High-performance monolithically integrated 120° downconverter with relaxed hardware constraints. , 2012, Optics express.

[5]  A. Moscoso-Martir,et al.  Ultra-wideband multilayer six-port junction with common phase error cancellation , 2012, 2012 42nd European Microwave Conference.

[6]  A. Banai,et al.  An Ultra-Broadband Direct Demodulator for Microwave FM Receivers , 2011, IEEE Transactions on Microwave Theory and Techniques.

[7]  B. Huyart,et al.  A novel RF front-end architecture for multi-band transceivers , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[8]  A. Moscoso-Martir,et al.  Six-port junction with complete UWB band coverage in multilayer technology , 2011, 2011 41st European Microwave Conference.

[9]  Alejandro Ortega-Moñux,et al.  Signal Constellation Distortion and Ber Degradation Due to Hardware Impairments in Six-Port Receivers with Analog I/Q Generation , 2011 .

[10]  Ke Wu,et al.  Planar lightwave circuit six-port technique for optical measurements and characterizations , 2005, Journal of Lightwave Technology.

[11]  A Koelpin,et al.  The Six-Port in Modern Society , 2010, IEEE Microwave Magazine.

[12]  A Ortega-Moñux,et al.  High-performance 90° hybrid based on a silicon-on-insulator multimode interference coupler. , 2011, Optics letters.

[13]  A. W. Davis,et al.  Phase diversity techniques for coherent optical receivers , 1987 .