Ultra wide band fmcw receiver design for airborne applications
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Ultra-Wide Band FMCW Receiver Design for Airborne Applications. By: Jay McDaniel. Scope. Project Description FMCW Review Challenges for Design of Airborne Applications UWB Design Challenges 2-18GHz FMCW Radar Design Integrated Layout Design Need for UWB Radar Questions.

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Presentation Transcript

Scope
Scope Applications

  • Project Description

  • FMCW Review

  • Challenges for Design of Airborne Applications

  • UWB Design Challenges

  • 2-18GHz FMCW Radar Design

  • Integrated Layout Design

  • Need for UWB Radar

  • Questions


Project description
Project Description Applications

Goals

  • Design and integrated layout of FMCW radar

  • Challenges associated with UWB designs

  • Challenges associated with airborne applications

    Deliverables

  • Paper design of a 2-18GHz FMCW radar

  • Integrated layout design ready for fabrication

  • Project Report


Frequency modulated continuous wave
Frequency Modulated Continuous Wave Applications

  • T = Repetition Period Bandwidth(B) = f2-f1

  • Chirp Rate(k) = B/T Resolution(δR) = c/(2*B)

  • Beat Frequency(Δf) = (2*R*k)/c c = 3x10^8m/s (free-space)



Airborne application design challenges1
Airborne Application Design Challenges Applications

  • Design Considerations

    • Altitude Variations

    • Look Angle Variations

      • Backscatter Coefficient (σo)

      • Range Resolution (ΔR/2sin(θ))

      • Antenna Gain, Pattern

    • Radar Range Equation

Nadir Case

Off-Nadir Case


Uwb design challenges
UWB Design Challenges Applications

  • Design Considerations

    • Expensive/Limited Hardware Options

    • Connectorized vs. Surface Mount Components

    • Frequency Dependency

      • Antennas

        • Gain and Pattern variations

      • Amplifiers, Mixer, and Attenuators

        • Gain Variations

          • Gain Equalizer (Active or Passive)

    • Board Layout

      • Technology: Microstrip, Stripline, CPWG



2 18ghz fmcw receiver design1
2-18GHz FMCW Receiver Design Applications

  • Maximum Expected Signal = -53.21dBm

  • Minimum Expected Signal = -73.21dBm

  • Input Saturation Power = -43dBm

  • MDS = -119dBm

  • Receiver Gain ≈ 55dB

  • ADC Dynamic Range is from 10dBm to -66dBm





Why uwb
Why UWB? Applications

  • Remember, the range resolution is c/2B. Therefore, the larger the bandwidth the finer resolution you can achieve.


Questions

Questions??? Applications