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Filter and filtering loop structure thereof

A technology of filter loop and main loop, applied in the field of communication, can solve problems such as complex structure

Pending Publication Date: 2019-11-08
COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, although multiple zeros can be achieved, it will lead to complex structures

Method used

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  • Filter and filtering loop structure thereof
  • Filter and filtering loop structure thereof
  • Filter and filtering loop structure thereof

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Embodiment Construction

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes ...

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Abstract

The invention relates to a filter and a filtering loop structure thereof, and two coupling loops can be formed in a main loop by arranging coupling branches. Moreover, each coupling loop comprises a capacitive coupling structure, so that a phase difference is generated in each coupling loop, and a pair of zero points can be generated in each coupling loop. Therefore, compared with a traditional filter, the filter of the invention is additionally provided with a pair of zero points and is of a six-cavity four-zero-point structure. Moreover, the cavity structure of the filter loop does not needto be changed, and only the coupling branches need to be added and the capacitive coupling structure needs to be arranged at a proper position. Moreover, a head resonator and a tail resonator in the main loop are arranged on the same side, so that the layout of input and output ports is facilitated, and the layout space of the filter is saved. Therefore, the filter and the filtering loop structurethereof have simple structures while realizing multiple zero points.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a filter and its filter loop structure. Background technique [0002] As a frequency-selective device, a filter is a very critical component in communication equipment. With the rapid development of communication technology, whether the device can achieve low insertion loss has become the key to restrict its development. The usual practice is to increase the number of zero points to make the passband wider and the suppression better, so as to achieve the purpose of reducing the insertion loss. When adding a zero point to a traditional filter, it is generally necessary to redesign the filter cavity structure. Therefore, although multiple zeros can be realized, the structure will be complicated. Contents of the invention [0003] Based on this, it is necessary to provide a filter with simple structure and capable of realizing multiple zeros and its filter loop structure....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208
CPCH01P1/208
Inventor 谢懿非丁海林显添
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD
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