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Radio frequency filter

A radio frequency filter and frequency band technology, applied in waveguide-type devices, resonators, impedance networks, etc., can solve the problem of difficult to obtain signal processing characteristics, and achieve the effect of saving installation costs and installation space

Inactive Publication Date: 2015-11-04
KMW INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, RF filters used in base station systems require high sensitivity and excellent filtering characteristics due to their operating characteristics, and it is difficult to obtain signal processing characteristics that allow additional frequency bands of existing frequency bands to meet various conditions

Method used

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  • Radio frequency filter
  • Radio frequency filter
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Embodiment Construction

[0046]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, there are multiple specific matters such as specific constituent elements, but these are provided only to help a more comprehensive understanding of the present invention, and are within the scope of the present invention for those of ordinary skill in the art to which the present invention belongs. , it will be apparent that such specific matters are subject to intended modifications or alterations. In addition, in the several drawings and the following description, the same code|symbol is attached|subjected to the same structure as much as possible.

[0047] Figure 1a and Figure 1b Several schematic block diagrams of radio frequency filters in various embodiments of the present invention, for example, disclose radio frequency filters applicable to base station systems. First, refer to Figure 1a , the rad...

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Abstract

The present invention relates to a radio frequency filter comprising: a first filter unit for filtering a signal in a first frequency band, which is a basic frequency band; a second filter unit for filtering a signal in a second frequency band, which is an additional frequency band in addition to the basic frequency band; and a switching unit having a structure in which at least one resonance terminal among one or more resonance terminals constituting the second filter unit is connected to or blocked from a ground terminal so as to extinguish or maintain the resonance function of the relevant resonance terminal(s).

Description

technical field [0001] The present invention relates to a radio frequency filter used in a wireless communication system, and in particular, relates to a radio frequency filter which can be more useful when having a cavity structure such as a cavity filter, and can be used to expand a filter band. Background technique [0002] Radio frequency filters, especially radio frequency filters with a cavity structure, are used to process and receive wireless signals in wireless communication systems. In particular, as representative application examples, radio frequency filters are applied to base stations or repeaters of mobile communication systems. [0003] In a radio frequency filter with a cavity structure, a housing space such as a cuboid is usually formed by means of a metal shell, that is, a plurality of cavity structures are provided, and a dielectric resonant element is provided inside each cavity structure. (DR: Dielectric Resonance element) or a resonant element composed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/54H03H7/12H01P1/20
CPCH01P1/2136H01P1/20H03H7/12H03H9/54H01P1/2002H01P7/10
Inventor 朴南信
Owner KMW INC
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