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學生 : 李國彰 指導教授 : 賴永齡 老師 PowerPoint PPT Presentation


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學生 : 李國彰 指導教授 : 賴永齡 老師. Development of a low cost microwave mixer using a broad-band substrate integrated waveguide (SIW) couple ( IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS ). Outline. Abstract Introduction Design of the broadband SIW coupler

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學生 : 李國彰 指導教授 : 賴永齡 老師

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學生:李國彰指導教授:賴永齡 老師

Development of a low cost microwave mixer using a broad-band substrate integrated waveguide (SIW) couple

( IEEE MICROWAVE AND WIRELESS

COMPONENTS LETTERS )


Outline

  • Abstract

  • Introduction

  • Design of the broadband SIW coupler

  • Design of the single-balanced mixer

  • Experimental results

  • Conclusion

  • References


Abstract

  • SIW coupler

  • Measured conversion loss 6.8dB

  • The wide-band response from 8.5 to 12GHz ( X-band)


Introduction

  • The requirement Microwave and millimeter wave communication system

    -low-cost

    -high performance mixers

  • Proposed mixer is a single-balanced mixer

  • SIW coupler acts as the input and power delivery


Design of the broadband SIW coupler

  • The propagation properties of the TE10-like mode in a SIW are very similar to that

    of the TE10 rectangular waveguide


Design of the broadband SIW coupler


Design of the broadband SIW coupler

  • “a” between the two rows of metallic vias determines the frequency band of the waveguide

  • The via diameter “D” is chosen to be

    equal or smaller than a tenth of the wavelength of the maximum operation frequency


Design of the singlebalanced mixer

  • Between the two diodes, another quarter-wavelength open-circuited stub at the LO frequency is adopted to prevent LO leakage

  • At the IF port, a stepped impedance low-pass filter was designed for IF output and isolation of RF and LO.

  • The mixer was simulated with Agilent ADS


Experimental results


Experimental results


Experimental results


Experimental results


Conclusion

  • Experimental results validate the performances and the highly integration of the proposed

    mixer

  • This mixer will be a good choice for designing high performance microwave and millimeter wave integrated circuits


References


References


References


References


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