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Infrared and Laser Engineering, Volume. 53, Issue 6, 20240088(2024)

Arrayed terahertz vector measurement system based on AlGaN/GaN HEMT heterodyne mixer

Kaichu WANG1,2, Qingfeng DING2,3, Qi ZHOU2,4, Xinhang CAI2,4, Jinfeng ZHANG2, Kaiqiang ZHU5, Zhenjun ZHAI5, Houjun SUN5, Linjun WANG1, and Hua QIN2
Author Affiliations
  • 1School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
  • 2Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
  • 3School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China
  • 4School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
  • 5School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
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    Figures & Tables(5)
    243 GHz AlGaN/GaN HEMT terahertz array components. (a)-(c) Physical image; (d) Equivalent circuit; (e) Test device of NEP; (f) NEP of IF signal as a function of Vg (channel 2); (g) NEP list; (h) Test device of antenna far-field directional response; (i) Power as a function of angle (channel 2)

    Fig. 1. 243 GHz AlGaN/GaN HEMT terahertz array components. (a)-(c) Physical image; (d) Equivalent circuit; (e) Test device of NEP; (f) NEP of IF signal as a function of Vg (channel 2); (g) NEP list; (h) Test device of antenna far-field directional response; (i) Power as a function of angle (channel 2)

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    (a) System hardware structure and (b) system software structure

    Fig. 2. (a) System hardware structure and (b) system software structure

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    System time stability of phase (each channel)

    Fig. 3. System time stability of phase (each channel)

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    (a) System physical diagram; (b) Phase distribution

    Fig. 4. (a) System physical diagram; (b) Phase distribution

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    (a) Estimation of the direction of the multi-angle THz beam; (b) Estimation of the direction of the THz beam at −5°

    Fig. 5. (a) Estimation of the direction of the multi-angle THz beam; (b) Estimation of the direction of the THz beam at −5°

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    Kaichu WANG, Qingfeng DING, Qi ZHOU, Xinhang CAI, Jinfeng ZHANG, Kaiqiang ZHU, Zhenjun ZHAI, Houjun SUN, Linjun WANG, Hua QIN. Arrayed terahertz vector measurement system based on AlGaN/GaN HEMT heterodyne mixer[J]. Infrared and Laser Engineering, 2024, 53(6): 20240088

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    Paper Information

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    Received: Mar. 1, 2024

    Accepted: --

    Published Online: Jul. 31, 2024

    The Author Email:

    DOI:10.3788/IRLA20240088

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology