Abstract
Digit-like periodic structures have demonstrated overtly multiple resonances that almost disqualify them as good candidates for microwave circuits, since it is rather difficult to identify their resonance at the dominant mode practically. In this work, an alternative solution to mitigate these spurious resonances is investigated. The dielectric loading effect is examined to determine its efficacy and extent. The results have been validated numerically using the commercially available finite integration technique solver. The findings indicate that the proposed alternative solution is promising. A wide impedance bandwidth or dual-band is achievable, depending on the location of the loading relative to the periodic structure and the feed system.