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Band-pass filter

A band-pass filter and outband technology, applied in the filter field, can solve problems such as poor signal quality, interference, and product performance impact

Inactive Publication Date: 2007-05-02
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This harmonic is likely to have many negative effects on communication products
For the outside of the product, there will be problems such as electromagnetic interference, and for the inside of the product, it will cause poor quality of transmitted / received signals, which will greatly affect the performance of the product

Method used

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Examples

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Embodiment Construction

[0012] Please refer to FIG. 1 , which is a schematic diagram of a bandpass filter 10 according to an embodiment of the present invention.

[0013] The bandpass filter 10 is disposed on the substrate 20 and includes an input terminal 100 , an output terminal 120 , a first transmission line 140 and a second transmission line 160 .

[0014] The input end 100 is used to feed in electromagnetic wave signals, and the output end 120 is used to feed out electromagnetic wave signals. The input end 100 and the output end 120 are both 50 ohm matching impedances of the bandpass filter 10 .

[0015] The first transmission line 140 is a microstrip transmission line, which includes a first ground end 141 and a first open end 142 . The first ground terminal 141 is electrically connected to the input terminal 100 , and the first open circuit terminal 142 is suspended. The first transmission line 140 further includes a first outer strip 143 , a first connecting portion 144 , a first common st...

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PUM

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Abstract

A band-pass filter is feeding electromagnetic wave signal by input end and feeding out electromagnetic wave signal by output end, forming the first transmission line by the first grounding end being electric-connected to input end and the first open circuit end, forming the second transmission line by the second grounding end being electric -connected to output end and the second open circuit end.

Description

【Technical field】 [0001] The invention relates to a high-frequency component, in particular to a filter. 【Background technique】 [0002] In recent years, due to the great increase in the market demand for mobile communication products, the development of wireless communication has become more rapid. Among the many wireless communication standards, the most eye-catching one is the 802.11 wireless communication standard formulated by the Institute of Electrical and Electronics Engineers (hereinafter referred to as: IEEE). LAN (Wireless Local Area Network) protocol. Established in 1997, the protocol not only provides many unprecedented functions in wireless communication, but also provides a solution that enables various wireless communication products of different brands to communicate with each other. The formulation of WLAN protocol has undoubtedly opened a new milestone for the development of wireless communication. Among many standards formulated by IEEE, IEEE 802.11b / g ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
Inventor 施延宜
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD