FUTURE WORK

The CHS concept is relatively new, so the research initiated here leads to the following sequence of work:

• Characterization and measurement on 3D Novel Routing and Advanced Planar Routing to correlate with simulation results.

Experiments on 3D Novel routing and advanced planar structures in future research is

required to correlate with simulation result. In addition, the CHS concept will offer a new

area for comparing traditional and modern (retarded) crosstalk. The parameters that should

be considered in the 3D Novel routing and Novel Coplanar measurement:

 Dielectric height variation.

 Trace spacing for edge side and broad side variation.

 Trace width variation.

 Dielectric permittivity variation at different layers.

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The main challenge for characterizing the 3D novel model is to design the

measurement probe point for extracting accurate S-parameters. The design should include

SMA connectors with different via transitions for each layer. However, the via placement

will extend the length mismatch between conductors and it will be difficult to de-embed

these effects in order to get accurate S-parameter for 3D novel routing. In addition, new

measurement methodology needs to be explored to get accurate result. Another alternative

measurement method is to probe a cross-section of the 3D novel routing board because no

vias would be required. Similar to the innovative technology introduced by 3D CHS novel routing, this measurement methodology will be needed to continue this research work.

Measurement on advanced coplanar with reference plane elimination could also be a

project for future research. In addition, future research could be focused on designing new

parameter variations for edge routing.

The CHS concept initiated here has been shown to be capable of shrinking the cable

and connector size by reducing not only the trace and spacing between signals but the

signal-to-ground ratio as well. So CHS cables and connectors promise to reduce the overall

system dimension and cost. In future research, CHS connectors can be further refined by

correlating the simulation results with fabricated measurement to achieve a proof-of-

concept. Then a ROTI analysis of the measurement results can be performed to determine

the final projected cost of the system.

The CHS concept for microstrip edge routing has been proven by simulation results,

but still needs to be proven by measurement results. However, there is no encoder and

decoder test chip yet developed to correlate the simulation results with any validation

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level on a transmitter and receiver [1], so this could also be a subject for future research

together with improving the encoder and decoder design for power reduction and cost.

Likewise, limitations on CHS at the circuit level could be explored. Besides that, a ROTI

analysis comparison on the cost between CHS, differential and traditional binary signaling

could be undertaken.

At higher data rates, CHS is limited by loss rather than crosstalk. Therefore, in future

research the CHS static matrix can be modified to include loss information and remove the

effect at the decoder. Besides that, the combination of CHS and equalizer (e.g: CTLE,

DFE) would be worthwhile subject to explore. Thus a combination of all this future

research work will make it possible to achieve the goal of enabling single-ended signaling

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