Dual-channel filter with different center frequencies

Abstract

The invention relates to a dual-channel filter with different center frequencies, which comprises a metal cavity, a first dual-mode dielectric resonator, a second dual-mode dielectric resonator and a third dual-mode dielectric resonator, wherein the first dual-mode dielectric resonator, the second dual-mode dielectric resonator and the third dual-mode dielectric resonator are positioned in the metal cavity and are cascaded; the bottom wall of the metal cavity is fixedly provided with two input ports which are coupled with the first dual-mode dielectric resonator and located in different mode electric field directions, and two output ports which are coupled with the third dual-mode dielectric resonator and located in different mode electric field directions; and one input port and one output port in the same electric field direction form a filter. Two filters are fused together to design a dual-channel filter, so that the circuit size is effectively reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and relates to a dual-channel filter with different center frequencies. Background technique [0002] In recent years, with the rapid development of modern communication systems, the RF front-end is developing in the direction of miniaturization and low loss. As one of the key components of the RF front-end, filters are widely used. Therefore, reducing the number of filters is of great significance for reducing the cost of RF front-end design. However, for the current mainstream design methods, when multiple filters need to be designed, stacking is often used, which has a large circuit size and high design and processing costs. In recent years, fusion design of multifunctional devices has received extensive attention. Fusion design of two or more filters, so that they share a device, can effectively reduce the size of the circuit. [0003] The applicant submitted the pat...

AI Technical Summary

Problems solved by technology

However, for the mainstream design methods at this stage, when multiple filters need to be designed, stacking is often used, and the circuit size is large, and the design and processing costs are high.

Images