A dual-channel filter balun with the same frequency based on a dual-mode dielectric resonator
A dielectric resonator, dual-channel technology, applied in resonators, waveguide devices, circuits, etc., can solve the problems of high design and processing costs, large circuit volume, etc., to reduce design and processing costs and reduce circuit volume. Effect
Active Publication Date: 2022-04-12
NANTONG UNIVERSITY
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Problems solved by technology
[0005] When it is necessary to design two filter baluns with the same frequency, the traditional stacking design is often used, which has a large circuit size and high design and processing costs.
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 , figure 2 As shown, the embodiment of the present invention is based on a dual-mode dielectric resonator-based dual-channel filter balun at the same frequency, including a metal cavity 1 (comprising two square cavities), a cascaded first dual-mode filter located in the metal cavity 1 A dielectric resonator 2 and a second dual-mode dielectric resonator 3 . The first dual-mode dielectric resonator 2 and the second dual-mode dielectric resonator 3 are coupled through the gap in the middle of the metal cavity 1 .
[0020] In the specific circuit design process of the present invention, a square dual-mode dielectric resonator is adopted, which includes two orthogonal degenerate modes of the same frequency ( pattern and model). according to pattern and The electric field polarization direction of the mode is as ...
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The invention relates to a dual-mode dielectric resonator-based dual-channel filtering balun, comprising a metal cavity, a cascaded first dual-mode dielectric resonator and a second dual-mode dielectric resonator located in the metal cavity, and a metal cavity Two input ports in different polarization directions coupled with the first dual-mode dielectric resonator and two pairs of output ports in different polarization directions coupled with the second dual-mode dielectric resonator are fixed on the bottom wall of the cavity , one input port and two output ports located in different polarization directions constitute a single-passband filtering balun. The present invention integrates two filter baluns into one design, shares the same two-order double-mode dielectric resonator, and designs a dual-channel filter balun, thereby further reducing circuit volume and design and processing costs. This is consistent with the development trend of low cost and miniaturization of future communication systems.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a same-frequency dual-channel filter balun based on a dual-mode dielectric resonator. Background technique [0002] Modern communication systems often need to be compatible with multiple types of communication systems. In order to ensure the communication quality of each signal, a large number of filters working in different frequency bands are required. [0003] The balun circuit (balanced to unbalanced conversion circuit) is a link between differential and single-ended devices, for example, for the connection between a differential antenna and a single-ended transceiver circuit. The balun circuit with filtering function (filtering balun) integrates the filter and the balun circuit, and there is no need for additional cascaded filters in the circuit, so the structure is more compact. [0004] The inventor submitted the Chinese invention patent application CN2016106...
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IPC IPC(8): H01P1/20H01P1/207H01P7/10
CPCH01P1/2002H01P1/207H01P7/105
Inventor 于玮陈建新唐为浩徐林
Owner NANTONG UNIVERSITY