Hybrid mode splitting in elliptical dielectric resonator

In this paper, the concept of hybrid mode splitting in an elliptical dielectric resonator (EDR) for realising dual-band bandpass filter is introduced. It is observed that hybrid mode splitting occurs in an EDR loaded asymmetrically along z-axis in a rectangular cavity. However, modes are getting coupled to single mode in case of symmetrically placed EDR. So, this concept is used to realise a dual-band bandpass filter with different bandwidths. The proposed filter is designed at centre frequencies of 13.97/14.66 GHz with bandwidth of 100/430 MHz, respectively. These types of filter are specially used for high-frequency space applications. Experimental studies have been done for cylindrical dielectric resonator (DR) to validate the proposed concept.