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Thin film bulk acoustic resonator (FBAR) filter and components thereof

A filter bank and filter technology, applied in the direction of electrical components, impedance networks, etc., can solve the problem of low power of FBAR filter

Inactive Publication Date: 2011-04-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an FBAR filter and its components, which solves the problem of low power of the FBAR filter in the prior art

Method used

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  • Thin film bulk acoustic resonator (FBAR) filter and components thereof
  • Thin film bulk acoustic resonator (FBAR) filter and components thereof
  • Thin film bulk acoustic resonator (FBAR) filter and components thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, the first FBAR filter includes: an input terminal 13 , an output terminal 14 , n series modules 11 and m parallel modules 12 .

[0034] The n series modules 11 are connected in series, the node N1 between the input terminal 13 and the first series module 11 , the node Nn between the nth series module 11 and the output terminal 14 , and the first series module 11 to the node between two adjacent series modules 11 in the nth series module 11, each node is respectively connected to one end of one parallel module 12, and the other end of each parallel module 12 is grounded; each series module 11 includes x FBARs 111 connected in parallel, and each parallel module 12 includes x FBARs 111 connected in parallel; x, m and n are natural numbers, and x is greater than or equal to 2.

[0035] Since each serial module and parallel module includes a plurality of FBARs connected in parallel, the power of the FBAR filter is effectively improved, and the power ...

Embodiment 2

[0041] like figure 2 As shown, the second FBAR filter includes: an input terminal 13 , an output terminal 14 , a series module 21 , a series module 22 , a parallel module 31 , a parallel module 32 and a parallel module 33 .

[0042] The series module 21 includes FBAR211, FBAR212 and FBAR213 connected in parallel, the series module 22 includes FBAR221, FBAR222 and FBAR223 connected in parallel, the parallel module 31 includes FBAR311, FBAR312 and FBAR313 connected in parallel, and the parallel module 32 includes FBAR321, FBAR322 and FBAR323, the parallel module 33 includes FBAR331, FBAR332 and FBAR333 connected in parallel.

[0043] The series module 21 and the series module 22 are connected in series, the node N1 between the input terminal 13 and the first series module 21 is connected to one end of the first parallel module 31, and the first series module 21 is connected to the second series module 22. The node N2 between is connected to one end of the second parallel modul...

Embodiment 3

[0046] like Figure 4 As shown, the third FBAR filter includes: a first matching network 15, a second matching network 16, an input terminal 13, an output terminal 14, a series module 21, a series module 22, a parallel module 31, a parallel module 32 and a parallel module 33.

[0047] The series module 21 includes FBAR211, FBAR212 and FBAR213 connected in parallel, the series module 22 includes FBAR221, FBAR222 and FBAR223 connected in parallel, the parallel module 31 includes FBAR311, FBAR312 and FBAR313 connected in parallel, and the parallel module 32 includes FBAR321, FBAR322 and FBAR323, the parallel module 33 includes FBAR331, FBAR332 and FBAR333 connected in parallel.

[0048] The series module 21 and the series module 22 are connected in series, the node N1 between the input terminal 13 and the first series module 21 is connected to one end of the first parallel module 31, and the first series module 21 is connected to the second series module 22. The node N2 between...

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Abstract

The invention discloses a thin bulk acoustic resonator (FBAR) filter and components thereof. The FBAR filter comprises an input terminal, an output terminal, n numbered serial modules and m numbered parallel modules, wherein the joint between each two of the input terminal, the n numbered serial modules and the output terminal is respectively connected with one end of one parallel module, and the other end of the each parallel module is grounded; each serial module and each parallel module respectively comprise x numbered parallel FBARs, x, m and n are natural numbers, and x is no less than 2; and the FBAR filter components successively comprise the input terminal, a first matching network, an FBAR filter bank formed by parallel connection of more than two FBAR filters, a second matching network and the output terminal. The FBAR filter and the components thereof have high power, and can satisfy the requirements of wireless equipment such as a base station and the like on power of FBAR filters.

Description

technical field [0001] The invention belongs to the technical field of filter devices, in particular to a thin film acoustic resonator (Thin Film Bulk Acoustic Resonator, FBAR for short) filter and its components. Background technique [0002] With the development of mobile communication technology, the amount of mobile data transmission is also rising rapidly. Therefore, under the premise of limited frequency resources and the use of as few mobile communication devices as possible, improving the transmission power of wireless power transmitting devices such as wireless base stations, micro base stations or repeaters has become a problem that must be considered. The requirements for filter power in the front-end circuits of mobile communication equipment are also increasing. [0003] At present, the high-power filters in wireless base stations and other equipment are mainly cavity filters, and their power can reach hundreds of watts, but the size of such filters is too larg...

Claims

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Application Information

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IPC IPC(8): H03H9/17H03H9/25
Inventor 董树荣张慧金吴梦军程维维金鹏程
Owner ZHEJIANG UNIV
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