Conductor disc used to suppress spurious mode and enhance electric coupling in a dielectric loaded combline resonator

摘要

The effects of conductor disc in a dielectric loaded combline resonator on its spurious performance, unloaded quality factor (Q), and coupling coefficients are analysed using a commercial electromagnetic software package CST Microwave Studio (CST MWS). The disc improves the spurious free band but simultaneously deteriorates the Q. The presence of the disc substantially improves the electric coupling by 1.891 for an aperture opening of 12 mm, while it has insignificant effect on the magnetic coupling.