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Elements in a fast communication channel 100GB/s

Elements in a fast communication channel 100GB/s. Midterm Presentation Spring 2010. By: Hanna Alam and Yousef Badran Project supervised by : Yossi Hipsh. Contents. Abstract A method for multiplexing to 100GB/s data Medium and connectors Testing the Microstrip -Line

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Elements in a fast communication channel 100GB/s

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  1. Elements in a fast communication channel 100GB/s Midterm Presentation Spring 2010 By: Hanna Alam and YousefBadran Project supervised by: YossiHipsh

  2. Contents • Abstract • A method for multiplexing to 100GB/s data • Medium and connectors • Testing the Microstrip-Line • Components and suitable devices • The Road up ahead • Gant Timeline

  3. Pointing out the target • The idea of the project is to be able to transfer energy through microstrip between two units located on the same motherboard at 100GB/s • Our main goal is designing the medium and suggesting a theoretical way to test and characterize it. e.g. : Internal Loss, propagation time, Signal integrity,…

  4. A method for multiplexing data 25GB/s 100GB/s

  5. A method for multiplexing data • Sharpening subunit • Reducing the bit time to 10ps

  6. A method for multiplexing data • Delay can be achieved by different techniques. • Lengthening the Microstrip, adding dummy capacitance, Digital delay (buffers),… • The buffers are to restore the signals power. • Finally adding all the signals by a simple combiner

  7. Medium and Connectors • Our focus will be on a 15cm length medium connecting two units on a motherboard • We choose to use Microstirp technology since it’s the most suitable for the short distance

  8. Medium and Connectors • Microstrip is a type of electrical transmission line which can be fabricated using PCB technology. • The configuration of the microstrip will be such that the conductor is surrounded by metallic planes, as in a tunnel.

  9. Medium and Connectors • What is a good dielectric material in such high frequency?

  10. Duroid 5580 • What’s the definition of “good”? • Isotropic • Uniform over volume • Low dielectric constant • Low electrical loss • Duroid 5580 manufactured by Rogers Corporation

  11. Duroid 5580 • All the measurements range to 10 GHz in IPC-TM-2.5.5.5

  12. Testing the µ-strip Line • We expect to get greater internal loss in high frequency: • Typical Duroid loss = 0.3 dB/λ µ-strip Line length=50* λ Total loss=15dB • We need few points in order to characterize the losses of the µ-strip Line Internal Loss [dB] f[GHz]

  13. Testing the microstrip To check IL we build the following configuration

  14. Testing the microstrip • In order to check SI we build the following configuration:

  15. Components and Suitable Devices • EVA-ADF4350 with an integrated PLL is the supposed unit to generate a stable 0.5:4.4 GHz signal • We deal with this unit as a black box with given parameters • It’s supposed to be the source signal for the microstrip test circuit • Output frequency fixed on 4.16GHz

  16. Components and Suitable Devices • We’ve checked a lot of companies such as Hittite, Millitec, TriQuint, Ducommun,Miteq… • We’ll show samples of such devices that are relevant to build the testing diagram • There are also a lot of devices which will be cataloged by the end of the project.

  17. TriQuint www.triquint.com Amplifiers The TriQuint TGA8334-SCC is a GaAs monolithic dual-gate distributed amplifier.

  18. Multipliers Miteq www.miteq.com

  19. Millitech www.millitech.com Multipliers

  20. Millitech www.millitech.com Detector

  21. Hittite www.hittite.com Mixers The HMC-MDB277 is a passive Double Balanced MMIC Mixer which utilizes GaAs Heterojunction Bipolar Transistor (HBT) Shottky diode

  22. The Road up Ahead • Designing a Microstrip line: length, width, resistance, dielectric material, … • Using the EVA-ADF4530 board in order to test the signal generator and the scope • Drawing conclusions and projecting them to advance the upcoming technology • Keep an eye for additional suitable devices and materials

  23. Gant Timeline

  24. Questions ? Thank you …

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