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1 results

  • Ka-band single-pole double-throw switch in GaN MMIC technology

  • Seyed Urman Ghozati, Roberto Quaglia
  • Journal:
    International Journal of Microwave and Wireless Technologies , First View
    Published online by Cambridge University Press:
    06 February 2025, pp. 1-11
    • Article
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  • This work describes the design process of a single-pole double-throw (SPDT) microwave switch operating at Ka-band. It is tailored to a tunable reflective termination design that can be used in tunable power amplifier configurations. A high electron mobility transistor and a resonating network are employed in shunt configuration to enhance the performance in the output port’s active and inactive conditions. The small and large signal measurements showcase a 2 GHz bandwidth with an insertion loss and isolation better than −1.8 dB and −25 dB, respectively, and handling power levels of up to 3 W at 30.5 GHz. The load-pull measurements across the entire Smith chart offer comprehensive insights into the behavior of the SPDT when operating with complex and reactive loads, fulfilling the purpose of tunable reactive termination.