| Summary: | 碩士 === 元智大學 === 電機工程學系 === 91 === With the increasing demands of the high cloak-rate applications on PC industries and consumer electronics, the connecting device such as printed circuit boards, connectors and cable assemblies become more important for wideband communications due to their non-idealities of high frequency characteristics. Specifically, the deteriorated effects caused by connecting devices are the major limitation, and in the role of bottleneck, for high-speed transmission.
In this thesis, the signal integrity of IEEE 1394 connectors and cable assemblies is discussed in details by means of simulations and measurements. A 3D electromagnetic simulator, High-frequency Structure Simulator (HFSS), is used to acquire the S-parameter of the plug and socket assembly. On the other hand, the measured S-parameter of the 1394 connecting device is also conducted by using the network analyzer. The simulated and measured S-parameter of 1394 connecting devices are incorporated into the Agilent’s circuit simulator ADS to compare the frequency- and time-domain responses. Finally, a harmonic-balance technique is applied to the cascading system for investigating the noise characteristics at nonlinear loading. Numerical simulation and physical measurement indicate that the 1394 cables have the features of low radiation interference and high noise immunity by the well designs of impedance-control and shielding effectiveness. The connectors then dominate the coupled signal interference in cable assemblies, and should be taken care to alleviate the signal impairments.
The wire-communications have the advantage of high-speed transmission rather than the wireless links, and still valuable for many applications. This study would be the helpful for the component manufactures of high-speed data transmission in trouble shooting or circuit designs.
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