Abstract
A comparative simulation-based study of tunable Planar Groove Gap Waveguide (PGGWG) cavities is presented. All cavities employ a simple biasing scheme to control the resonance of the cavity electronically. This is done by exploiting the DC isolation of the Planar Groove Gap Waveguide geometry for device biasing. Results obtained show that a higher tuning range (1.4%) is obtained with a rectangular PGGWG cavity as opposed to square and circular cavities. A higher unloaded Q-factor is obtained for the square cavity, which is more variable over the tuning range as compared to the circular and rectangular cavities.
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