System for Next-Gen Wireless Devices

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Sponsor
Duration: Fall 2018 - Spring 2019
Team Name Next-G
Adviser
Client
Team Members:
  • Thomas Parks
  • Zouning Dai
  • Shuhan Zhang
  • Hui Xie
  • Problem Definition[edit]

    Background[edit]

      With the widespread of wireless communication devices, there is an ever-growing demand for portable, low-cost, and easy to use devices that are capable of evaluating the electromagnetics performance of antennas or wireless devices/systems. Conventional measurement systems are very accurate but, in meantime, they are also bulky and expensive. This limits their use in field measurements, in classrooms, as well as in everyday life.

    Deliverables[edit]

    • Basic Board(Explorer Board)
    • 2.4 GHz Antennas
    • Operating system(Raspbain)
    • Wires
    • Soldering equipment
    • ADC
    • Raspberry Pi 3 B+
    • WIFI Adapter Wireless USB Adapter
    • Raspberry Pi Foundation
    • The device must cost under $1000
    • Easy to carry
    • Error correction on transmitted data

    Specifications[edit]

    • Design an antenna characterization system for next-generation wireless devices to visualize the properties of an antenna system in an easy way and provide educational material to explain these properties to non-specialists.
    • The device should test and show the impedance, total efficiency of antennas real time. At the same time, it should be portable and low-cost.
    • We decide that the impedance and total efficiency to be our major measurement, if got more time, we may measure parameters as well. For the first three months, our major task is to assemble the prototype then test and improve it.

    Design Considerations[edit]

    Theory[edit]

    The Diagram above illustrates how we will generate a signal with an antenna with known values, as seen on the left, and use our raspberry pi to measure and acquire the data from our unknown antenna for characterization. Characterization can either take place on the receiving raspberry pi itself or the computer can characterize the antenna. The computers main purpose is for visualization of our data.

    Current design[edit]

    Current design

    Project Learning[edit]

    Raspberry pi.jpg
  • The Raspberry Pi provides the functionality to create and measure waveforms. There are open source projects that can be found on the web for this functionality.
  • There is a potential to incorporate various antennas for us to measure
  • The Raspberry Pi also makes it easier to communicate with a computer, which we may need to use to process/visualize the data we collect
  • We are now in the design phase involving the raspberry pi. We will begin work on bypassing the Raspberry Pi’s antenna for our own, and creating a matlab program to take inputs for given measurements and output characterized visuals of our antenna using Frii’s Equation.
  • Explorer Board.png The Digilent Explorer board did not meet requirements of our system. The board used could only generate a 4MHz signal, meaning if we wanted to design a useable half-wavelength antenna we would need at least 38 meters of material. The oscilloscope is also only capable of measuring a signal up to 100MHz, because of this the Explorer board is not suitable for our goal.
  • Provides built-in analog waveform generator and oscilloscope
  • We could use the oscilloscope to compare our generated analog waveform to what we would be measuring on the antenna.
  • This would allow us to characterize:Impedance,Efficiency,Bandwidth,Gain
  • [[File: |ADC]] .
    [[File: |Antenna]] .

    Final Design[edit]

    Validation[edit]

    Team Information[edit]

    Biography Discipline
    Thomas Parks [[File:|center]]


    Electrical Engineering.
    Zhangshu Han [[File:|center]]


    Electrical Engineering
    Zouning Dai [[File:|center]]


    Electrical Engineering
    Hui Xie [[File:|center]] Electrical Engineering

    Additional Documentation[edit]

    Project Schedule

    [[File:]]

  • Project Portfolio Links: Client Interview File:Client-interview-transcript.pdf