Design of balanced filtering rat-race coupler based on quad-mode dielectric resonator
- Publisher:
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Publication Type:
- Journal Article
- Citation:
- IEEE Transactions on Circuits and Systems II: Express Briefs, 2021, 68, (7), pp. 2267-2271
- Issue Date:
- 2021-07-01
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Filename | Description | Size | |||
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Design_of_Balanced_Filtering_Rat-Race_Coupler_Based_on_Quad-Mode_Dielectric_Resonator.pdf | Published version | 2.37 MB |
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A balanced filtering rat-race coupler is proposed based on a quad-mode dielectric resonator (DR) in this brief. Due to the electromagnetic-field distributions of the DR, the desired balanced performance with high common-mode suppression is realized without additional circuits. Moreover, by setting the feeding probes at the proper locations, the quad-mode DR is also used to obtain the desired coupler topology with filtering responses. Accordingly, a balanced filtering rat-race coupler, integrating three circuit functions of the balanced circuit, rat-race coupler, and bandpass filter, can be designed into a single-cavity configuration, resulting in a very compact size. For verification, the proposed circuit is implemented, which shows good filtering responses, low amplitude imbalance, high common-mode suppression, and excellent phase characteristics.
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