Network throughput: Difference between revisions

Revision as of 17:47, 3 March 2024

Revision as of 17:51, 3 March 2024

Line 62:

*RC losses: Wires have an inherent resistance, and an inherent [[capacitance]] when measured with respect to ground. This leads to effects called [[parasitic capacitance]], causing all wires and cables to act as RC lowpass filters.

*[[Skin effect]]: As frequency increases, electric charges migrate to the edges of wires or cable. This reduces the effective cross-sectional area available for carrying current, increasing resistance and reducing the signal-to-noise ratio. For [[American wire gauge|AWG]] 24 wire (of the type commonly found in [[Cat 5e]] cable), the skin effect frequency becomes dominant over the inherent resistivity of the wire at 100&nbsp;kHz. At 1&nbsp;GHz the resistivity has increased to 0.1 ohms/ohm per inch.<ref>Johnson, 1993, 154</ref>

*Termination and ringing: For long wires (wiresWires longer than about 1/6 wavelengths can be considered long) must be modeled as [[transmission line]]s and takewith termination taken into account. Unless this is done, reflected signals will travel back and forth across the wire, positively or negatively interfering with the information-carrying signal.<ref>Johnson, 1993, 160-170</ref>

*[[Radio Propagation|Wireless Channel Effects]]: For wireless systems, all of the effects associated with wireless transmission limit the SNR and bandwidth of the received signal, and therefore the maximum numberbit of[[transmission bits that can be sentrate]].

===IC hardware considerations===