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LTCC filter for coupling inhibition of third and fifth harmonics based on frequency selectivity

A frequency-selective, fifth-harmonic technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of large insertion loss, large size, complex structure, etc., to achieve improved selectivity, compact structure, wide resistance band effect

Active Publication Date: 2016-02-17
SOUTH CHINA UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] However, the existing stop-band suppression filters all have relatively complex structures, or have problems such as large size and large insertion loss.

Method used

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  • LTCC filter for coupling inhibition of third and fifth harmonics based on frequency selectivity
  • LTCC filter for coupling inhibition of third and fifth harmonics based on frequency selectivity
  • LTCC filter for coupling inhibition of third and fifth harmonics based on frequency selectivity

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Embodiment Construction

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. The drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

[0030] Such as figure 1 As shown, the embodiment of the present invention provides a LTCC filter based on frequency selective coupling for third and fifth harmonic suppression, which is characterized in that the entire filter is an LTCC multilayer structure, consisting of nine dielectric substrates, ten conductor layers and eight metal vias; two quarter-wavelength short-circuit resonators are respectively connected by microstrip lines located in five different conductor layers through metal vias, and are distributed in a left-right symmetrical structure; two feed lines a...

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Abstract

The invention discloses an LTCC filter for the coupling inhibition of third and fifth harmonics based on frequency selectivity, and the filter comprises two quarter-wave resonators, two feed lines, and a plurality of floor layers, wherein the two quarter-wave resonators, the two feed lines and the plurality of floor layers are respectively distributed on ten conductor layers, and all layers are connected with each other through metal through holes. The first, third, fifth, eighth and tenth layers are floors, the second, fourth, sixth and ninth layers are circuit layer, and the seventh layer is a layer where a feed circuit is located. The feed line between the two feed lines and the resonator at the sixth layer is achieved in a mode of parallel coupling, and coupling regions between the two feed lines and the resonators are selected for inhibiting third and fifth harmonics, thereby achieving a wide stop band. The two quarter-wave resonators achieves the coupling between a part of branch nodes, thereby achieving a wide stop band filter which inhibits third and fifth harmonics. The LTCC technology employed by the invention employs a multi-layer structure, and reduces the size of the filter.

Description

technical field [0001] The invention relates to a wide-stop-band band-pass filter based on LTCC technology, in particular to a band-pass filter that uses a feed structure to suppress high-order harmonics and can be applied to radio frequency front-end circuits. Background technique [0002] With the continuous upgrading of modern communication systems, the rapid development of wireless communication technology puts forward stricter requirements for RF front-end circuit components. High performance, miniaturization, and low cost have become important indicators for evaluating components today. The rapid development of wireless communication technology and the increasingly tense global communication frequency bands put forward stricter requirements for microwave filters. Modern filters require high performance, small size, wide stop band, and low cost. Among them, small size and wide stopband are important indicators of single passband filter performance. [0003] Most of th...

Claims

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Application Information

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IPC IPC(8): H01P1/212
Inventor 章秀银郭庆毅张垚赵小兰
Owner SOUTH CHINA UNIV OF TECH
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