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A layout structure for improving out-of-band rejection of surface acoustic wave receiving filter

A receiving filter and out-of-band suppression technology, which is applied in the field of filters, can solve problems such as difficult high-frequency suppression, and achieve improved suppression effects

Active Publication Date: 2021-08-17
CHENGDU PINNACLE MICROWAVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design and production of the receiving filter is generally designed according to the usage scenario, but the suppression in the high frequency band is difficult

Method used

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  • A layout structure for improving out-of-band rejection of surface acoustic wave receiving filter
  • A layout structure for improving out-of-band rejection of surface acoustic wave receiving filter
  • A layout structure for improving out-of-band rejection of surface acoustic wave receiving filter

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0022] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It should not be construed as limiting the invention by impl...

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Abstract

The present invention relates to the field of filters, in particular to a layout structure for improving the out-of-band suppression of a surface acoustic wave receiving filter. The metal conductor is connected to multiple ground terminals of the filter, and a ring-shaped metal conductor is arranged on the outer ring of the filter to connect multiple ground terminals together to form another common ground connection terminal, and a new inductance is introduced between the ground terminals, so that the One or more zero points are generated in the high-frequency band, which effectively improves the high-frequency suppression of the filter without affecting the pass-band characteristics.

Description

technical field [0001] The invention belongs to the field of filters, in particular to a layout structure for improving the out-of-band suppression of a surface acoustic wave receiving filter. Background technique [0002] The designed SAW filters mainly include ladder filters and DMS filters, which are widely used in receiving filters. The receiving filters have higher performance requirements for the suppression effect of high frequency bands. The design and production of the receiving filter is generally designed according to the usage scenario, but the suppression in the high frequency band is difficult. Contents of the invention [0003] The present invention provides a layout structure for improving the out-of-band suppression of a surface acoustic wave receiving filter, which greatly improves the suppression of the high-frequency band and ensures the performance of the passband. The layout structure includes a ring-shaped metal conductor, and the ring-shaped metal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H9/17H03H9/56
CPCH03H9/17H03H9/56
Inventor 安虹瑾董元旦杨涛安建光赵孟娟
Owner CHENGDU PINNACLE MICROWAVE CO LTD