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.

中文翻译：

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平面槽隙波导技术中可调谐谐振器的实现

我们在 K 处提出了可调谐平面凹槽间隙波导 (PGGWG) 谐振腔一种-乐队。该腔在没有桥接导线或环形环的情况下展示了变容二极管负载和偏置，这在传统的基板集成波导 (SIW) 谐振腔中通常是必需的。还提供了详细的协同仿真策略，以及指示性参数调整数据。测量结果表明 4.48% 的连续频率调谐范围为 32.52–33.98 GHz 和问你调谐范围为 63–85，对应于 0–16 V 的直流偏置电压。分析了仿真结果和测量结果之间的差异，并追溯了多层印刷电路板堆栈中的工艺变化，以及未考虑的变容二极管寄生和表面粗糙度。