10-Gbit/s Bidirectional and 20-Gbit/s Unidirectional 2-ch Wireless Data Transmission System Using 120-GHz-Band Finline Orthomode Transducers

Jun TAKEUCHI  Akihiko HIRATA  Hiroyuki TAKAHASHI  Naoya KUKUTSU  Yoshiaki YAMADA  Kei KITAMURA  Mitsuhiro TESHIMA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E97-C   No.2   pp.101-110
Publication Date: 2014/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E97.C.101
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
ortho-mode transducer (OMT),  finline,  millimeter waves,  polarization-multiplexing,  

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Summary: 
This paper presents 10-Gbit/s bidirectional and 20-Gbit/s unidirectional wireless data transmission systems using 120-GHz-band finline orthomode transducers (OMTs). A new finline OMT was fabricated with two improved designs, to adapt it to the data transmission characteristics of the 120-GHz-band wireless link. One improvement is higher isolation between orthogonal ports and the other is lower group delay variation. The measured isolation is more than 59dB at the carrier frequency of the 120-GHz-band wireless link, and the measured group delay variation is 43ps. Using the finline OMT, we developed 10-Gbit/s bidirectional and 20-Gbit/s unidirectional wireless equipment that can transmit two channels of 10-Gbit/s data using polarization multiplexing. With this wireless equipment, we succeeded in 10-Gbit/s bidirectional and 20-Gbit/s unidirectional wireless data transmission, which leads to successful seamless connection to 10 Gigabit Ethernet and 12-ch high definition television signal transmission.