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Active power filter, duplexer and wireless communication equipment

A source filter and filter technology, applied in single-port active networks, electrical components, transmission systems, etc., can solve the problems that filters are difficult to take care of multiple performance indicators, expensive, and cavity filters are large in size

Inactive Publication Date: 2013-04-03
HYTERA COMM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used filters are usually difficult to take into account multiple performance indicators
For example, existing cavity filters are large and expensive

Method used

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  • Active power filter, duplexer and wireless communication equipment
  • Active power filter, duplexer and wireless communication equipment
  • Active power filter, duplexer and wireless communication equipment

Examples

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Embodiment Construction

[0062] The embodiment of the present invention provides an active filter, a duplexer and a wireless communication device, so as to take into account multiple excellent performance indexes of the filter.

[0063] 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, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0064] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a particular order or sequence. It is to be und...

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Abstract

The embodiment of the invention discloses an active power filter, a duplexer, and wireless communication equipment. The active power filter comprises a first filter, a first amplifier, a second filter, a down converter, a third intermediate-frequency filter, a second amplifier, a fourth intermediate-frequency filter, an up converter, a fifth radio frequency filter, and a voltage-controlled oscillator which is used for providing local oscillation signals to the down converter and the up converter, wherein the input end of the first amplifier is connected with the output end of the first filter while the output end of the first amplifier is connected with the input end of the second filter; the output end of the second filter is connected with the input end of the third intermediate-frequency filter through the down converter; the output end of the third intermediate-frequency filter is connected with the input end of the second amplifier; the output end of the second amplifier is connected with the input end of the fourth intermediate-frequency filter; and the fourth intermediate-frequency filter is connected with the input end of the fifth radio frequency filter through the up converter. By virtue of the scheme, multiple excellent performance indexes of the filter can be taken into consideration conveniently.

Description

technical field [0001] The invention relates to the technical field of communication circuits, in particular to active filters, duplexers and wireless communication equipment. Background technique [0002] At present, with the rapid development of modern wireless communication systems, radio spectrum resources are becoming increasingly tight. The increasingly complex communication environment and increasingly tight radio spectrum resources make the requirements for filters in the field of radio communication more and more high. The pursuit of filter performance in the industry may mainly involve the following aspects: lower in-band insertion loss, higher out-of-band rejection, greater power capacity, smaller size, lower cost, etc. Currently widely used filters are usually difficult to take into account multiple performance indicators. For example, existing cavity filters are large in size and expensive. Contents of the invention [0003] The embodiment of the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/46H04B1/38H04B1/50
Inventor 高家荣
Owner HYTERA COMM CORP
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