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Three-mode balance filter using coupling branch knot load slot wire resonant structure

A technology of balanced filter and resonant structure, which is applied in the microwave field, can solve the problems of low frequency selectivity and large passband loss, and achieve the effect of low loss and high selectivity three-mode passband characteristics

Pending Publication Date: 2018-11-23
JINGGANGSHAN UNIVERSITY
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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical defects of large passband loss and low frequency selectivity of the existing three-mode balanced filter, and provide a coupling stub-loaded slot line resonance technology to achieve low loss and high frequency selectivity three-mode balance filter, and the stop band performance is good, easy to process

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  • Three-mode balance filter using coupling branch knot load slot wire resonant structure
  • Three-mode balance filter using coupling branch knot load slot wire resonant structure
  • Three-mode balance filter using coupling branch knot load slot wire resonant structure

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific examples.

[0025] figure 1 Shown is the first filter described in the present invention, and the whole filter structure is figure 2 The lower half structure of the three-mode balanced filter shown in the present invention, the three-mode balanced filter using the coupling stub loaded slot line resonant structure described in this embodiment, includes: the first input feeder 1a; the first output feeder 2a; the connecting slot line 3 of the three-mode balanced filter composed of the main resonator connecting slot line 3a of the first filter and the main resonator connecting slot line of the second filter; the first feeding slot line 4a; the second Two feeding slot lines 5a; the first branch loading slot line resonator 6a and the second branch loading slot line resonator 7a; the second input feeding line 1b; the second output feeding line 2b; the third feeding slot line 4b; The feeding s...

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Abstract

The invention discloses a three-mode balance filter using a coupling branch knot load slot wire resonant structure. The three-mode balance filter comprises a first filter and a second filter which arevertically symmetrical about a main resonator connecting slot wire; the technical defect that an existing three-mode balance filter is high in passband loss and relatively low in frequency selectivity is solved by using the combination of a micro-strip-slot line vertical feed structure and a coupling branch knot load slot wire resonant technology, the three-mode balance filter with low loss and relatively high frequency selectivity is realized, and the three-mode balance filter is good in stop band performance and convenient to process. Therefore, the three-mode balance filter meets the design requirements of small communication systems, and can be applied to microwave electronic systems such as mobile communication, radar and remote sensing.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a three-mode balanced filter adopting a coupling stub-loaded slot-line resonant structure. Background technique [0002] Due to the requirements of energy saving and emission reduction in wireless systems and the trend of system miniaturization and portability, the filter unit must have low loss and small size, and the use of multimode resonators is one of the most effective methods for miniaturization of microwave filters. The multi-mode generation mechanism can be divided into degenerate multi-mode resonators and high-order multi-mode resonators, and according to the number of modes, it can be divided into dual-mode, three-mode, four-mode...N-mode bandpass filters. Among them, the dual-mode band-pass filter and the triple-mode band-pass filter are the most common two types of multi-mode band-pass filters. [0003] On the other hand, communication system processing often enc...

Claims

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Application Information

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IPC IPC(8): H01P1/203
CPCH01P1/203
Inventor 张智翀罗文浪孔翠香刘宇安吕敬祥程娅荔
Owner JINGGANGSHAN UNIVERSITY
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