Dual-filter duplexer

A duplexer and double filter technology, applied in the electronic field, can solve problems such as difficult high-order harmonic suppression, low harmonic suppression, and large radiation interference, and achieve improved isolation, high harmonic suppression, and strong anti-interference ability Effect
CN102571017AInactive Publication Date: 2012-07-11DFINE TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DFINE TECH
Publication Date
2012-07-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a dual-filter duplexer, relates to the field of electronic technology, and aims to solve the technical problems of a traditional LC duplexer that large radiated interference, large insertion loss and low harmonic suppression exist between two high-and-low-pass filters and difficulty exists in suppressing higher harmonics. The dual-filter duplexer consists of an LC low-pass filter and an LC band-pass filter, wherein the LC low-pass filter is connected with the input terminal of the LC band-pass filter and also connected with an external signal source; and the output terminals of the two filters respectively output outwards.
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Description

technical field

[0001] The invention relates to the field of electronic technology, in particular to a double-filter duplexer applied to microwave communication, satellite communication, electronic equipment and the like. Background technique

[0002] The duplexer is an important component in the communication system. High isolation is an important guarantee for signals of different frequencies to share the same port without interfering with each other. The usual duplexer places the components directly on the same PCB, and the signals will radiate and interfere with each other.

[0003] When the working frequency of the low frequency band is within the range of 5-10MHz, the high-frequency band works at 950MHz-1600MHz, and the high-frequency band works at 100 times or more of the low-frequency band, usually the tenth harmonic of the filter is difficult to deal with and is common. The following deficiencies:

[0004] 1) It is difficult to avoid the mutual radiation interfer...

Claims

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