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1 results

  • Implementation of tunable resonators in planar groove gap waveguide technology

  • Titus Oyedokun, Riana H. Geschke, Tinus Stander
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 14 / Issue 4 / May 2022
    Published online by Cambridge University Press:
    22 April 2021, pp. 438-444

  • We present a tunable planar groove gap waveguide (PGGWG) resonant cavity at Ka-band. The cavity demonstrates varactor loading and biasing without bridging wires or annular rings, as commonly is required in conventional substrate-integrated waveguide (SIW) resonant cavities. A detailed co-simulation strategy is also presented, with indicative parametric tuning data. Measured results indicate a 4.48% continuous frequency tuning range of 32.52–33.98 GHz and a Qu tuning range of 63–85, corresponding to the DC bias voltages of 0–16 V. Discrepancies between simulated and measured results are analyzed, and traced to process variation in the multi-layer printed circuit board stack, as well as unaccounted varactor parasitics and surface roughness.