Gbps data transmission in biomedical and communications instruments

The paper proposes a distribution network for Gbps data transmission over. The study is based on a real design made for data communications of an aerospace instrument. This type of transmissions presents problems based principally on crosstalk and attenuation, therefore a careful design of distribution network and an adjustment of terminal loads are very important. A frequency scaled prototype at 20 Mbps has been designed and tested, obtaining models of the complete circuit, crosstalk and interferences between near buses. Then a new design has been proposed to be used up to 8 Gbps. On this design, the wired distribution network is based on the use of broadband couplers and low-loss transmission lines. Finally, possible aspects will be analyzed, as it was done in the Transmission/Reception System, such as the crosstalk or interferences between near buses and the possible introduction of some mechanism of protection.