Double-passband balun filter
A technology of balun filter and dual-passband, which is applied in waveguide devices, electrical components, circuits, etc., can solve problems such as difficult to meet the requirements of dual-channel signals, and achieve the effect of simple structure and small size
Active Publication Date: 2014-01-22
ZHONGTIAN BROADBAND TECH +1
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Problems solved by technology
Therefore, the existing balun filter designed using substrate integrated waveguide technology is difficult to meet the requirements for dual-channel signals
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[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0020] Such as figure 1 As shown, the dual-passband balun filter is designed using substrate-integrated waveguide technology, which includes a substrate 1 . The substrate 1 is roughly L-shaped. A first resonant cavity 10 and a second resonant cavity 20 are formed in the substrate 1 . Both the first resonant cavity 10 and the second resonant cavity 20 are rectangular parallelepiped and arranged adjacent to each other. The top walls of the first resonant cavity 10 and the second resonant cavity 20 are located on the same plane, and the bottom walls of the first resonant cavity 10 and the second resonant cavity 20 are also located on the same plane. The first resonant cavity 10 and the second resonant cavity 20 are part...
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The invention relates to a double-passband balun filter. The double-passband balun filter comprises a substrate, wherein a first resonant cavity and a second resonant cavity are formed in the substrate, the first resonant cavity and the second resonant cavity are adjacent and align to each other partially, a first coupling structure and a second coupling structure are arranged between parts, which align to each other, of the first resonant cavity and the second resonant cavity, the first coupling structure extends along the central axis of the first resonant cavity, and the second coupling structure extends along the central axis of the second resonant cavity; and a first output feed microstrip line, a second output feed microstrip line and an input feed microstrip line, and the first and second output feed microstrip lines are symmetrical about the geometric center of the first resonant cavity. The double-passband balun filter has the benefits that requirements of the balun filter for dual-passband signals are met, and the double-passband balun filter is simple in structure and small in size.
Description
technical field [0001] The invention relates to the field of communication equipment, in particular to a double-pass band balun filter. Background technique [0002] A balun filter is a device that combines the functions of a balun and a filter. It can not only convert an unbalanced signal into a balanced signal, but also provide frequency filtering for the signal. Integrating the balun and the filter together to form a three-port module can effectively reduce the loss and volume of the functional module for the communication system. [0003] For higher frequency applications, devices designed using substrate-integrated waveguide technology have the advantages of low loss, low processing cost, and easy integration. But in the past, only resonators in the form of transmission lines have been used to design dual-passband balun filters. Currently, there are only single-pass band balun filters designed using substrate-integrated waveguide technology. Therefore, the existing b...
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IPC IPC(8): H01P1/208
Inventor 褚慧金晨陈建新施金唐慧周立衡包志华
Owner ZHONGTIAN BROADBAND TECH