A Novel Cubic TM010 Mode Cylindrical Dielectric Cavity Filter

The accurate analysis for the resonant frequency and field components of the TM
₀₁₀
mode of a cylindrical dielectric resonator is presented, and then a miniaturized TM
₀₁₀
mode dielectric cavity filter with very high close-to-band rejections which passband is 2570MHz to 2620MHz, TD-LTE frequency band, is designed and optimized. The calculation and design show that the TM
₀₁₀
mode dielectric filter has a great advantage over TE
_01δ
mode dielectric filter and metallic filter in miniaturization. The three-dimensional layout of the filter which is more compact and diverse in shape is beneficial to the cross-coupling among the resonators and reduce the size of the occupied ground.