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Filters and Duplexers

A filter and resonator technology, applied in electrical components, networks using active components, impedance networks, etc., can solve problems such as the inability to adjust the filter matching degree adaptively, and the poor stability of the filter's operating parameters.

Active Publication Date: 2020-04-24
XIAMEN SANAN INTEGRATED CIRCUIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under the existing technology, the parameters of the matching inductor are generally fixed, and the matching degree with the filter cannot be adjusted adaptively, resulting in poor stability of the working parameters of the filter.

Method used

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  • Filters and Duplexers

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, the terms "first", "second" and the like are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0030] Please see figure 1 , which is a schematic diagram of a duplexer 10 according to an embodiment of the present application. The duplexer 10 of this embodiment includes: a first filter 100 a , a second filter 100 b and an antenna 200 . The first filter 100a includes a first resonator group 110a and a first adjustable inductance group 120a. The second filter 100b includes a second resonator group 110b and a second adjustable inductance group 120b, and the first filter 100a and the second filter 100b are stacked ( figure 1 In is a schematic diagram of two filter stacks separated) and connect...

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Abstract

The invention provides a filter and a duplexer, and the filter comprises a resonator group which is disposed on a wafer; and an adjustable inductor group arranged in the dielectric layer and connectedwith the resonator group. An adjusting point is arranged on the adjustable inductor group and is used for adjusting the inductance value of the adjustable inductor group by changing disconnection ofthe adjusting point, so that the filter has a corresponding electrical matching degree. According to the filter, by adjusting the inductance value of the adjustable inductance group, the filter has acorresponding electrical matching degree, so that the stability of the working parameters of the filter is improved.

Description

technical field [0001] The present application relates to the technical field of semiconductors, in particular to a filter and a duplexer. Background technique [0002] A duplexer is a bidirectional three-terminal filter. A duplexer consists of two bandpass filters with different center frequencies and an impedance matching network. [0003] Among the two bandpass filters with different center frequencies, the bandpass filter with the lower center frequency is the transmit channel filter (Tx), and the other bandpass filter with the higher center frequency is the receive channel filter (Rx) . The Rx filter receives a signal from an antenna, and filters a signal of a specific frequency band. The Tx filter filters only a signal of a specific frequency band among signals generated in the communication device, and supplies the filtered signal to the antenna. The duplexer uses the frequency difference between the transmitted signal and the received signal to filter the two sig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H11/34
CPCH03H11/344
Inventor 罗捷蔡文必谢祥政尤建发
Owner XIAMEN SANAN INTEGRATED CIRCUIT
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