A novel approach for changing the coupling nature between TE01δ‐mode dielectric resonators

In this article, a novel coupling method which could easily change the coupling nature between two TE_01δ‐mode dielectric resonators (DRs) is presented. This method is based on electric field orientation of DR operating in TE_01δ‐mode, through altering the direction of the coupling structure in one DR, the coupled electric field orientation in the other DR would be changed along with the coupling nature between two resonators. To prove this method, two filters using cascaded quadruplet coupling structure have been designed, fabricated and measured. The coupling strength is enhanced due to the employ of two grounded mental cylinder on both sides of the copper sheet. In addition, a tuning screw is introduced between two DRs to adjust the coupling strength after mounting expediently. Measured results confirmed the predicted performance, showing that the coupling nature and coupling strength are controllable between two DRs. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:226–231, 2016.