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Filter and duplexer of miniature acoustic resonator based on cancellation technology

A technology of acoustic wave resonator and filter, applied in the field of electronics, can solve the problems of high loss, large size and low performance

Pending Publication Date: 2020-11-27
XWAVE TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of large size, low performance and high loss in existing filters and duplexers

Method used

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  • Filter and duplexer of miniature acoustic resonator based on cancellation technology
  • Filter and duplexer of miniature acoustic resonator based on cancellation technology
  • Filter and duplexer of miniature acoustic resonator based on cancellation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Reference figure 1 In this embodiment, a duplexer of a miniature acoustic resonator based on cancellation technology includes two hybrid couplers connected to each other, and the hybrid coupler includes an input port In, a through port T, a coupling port C, and an isolation port. Port ISO, the through ports T of the two hybrid couplers are connected to each other with a two-port network F1 in the middle, and the coupling ports C of the two hybrid couplers are connected to each other with a two-port network F2 in the middle, and the inputs of the two hybrid couplers Port In is connected to the two-port network F3 and TX ports respectively, and the isolation ports ISO of the two hybrid couplers are respectively connected to ANT and the load. Port network.

[0030] The purpose of the two-port network is to isolate the RX port and the TX port, while allowing signals to propagate between the ANT and TX ports and between the RX port and the TX port. The mixed cancellation netwo...

Embodiment 2

[0035] Reference figure 2 In this embodiment, a micro-acoustic resonator filter based on cancellation technology includes a hybrid coupler, the through port T and the coupling port C of the hybrid coupler are connected to form a loop and the loop is provided with a two-port network F1, the isolation port ISO of the hybrid coupler is connected with an output port, the input port In of the hybrid coupler is connected with a two-port network F2, and the two-port network F1 and the two-port network F2 are both the same two-port network .

[0036] The two-port network can be designed to have a band-pass transfer function between the two ports, which corresponds to the band-stop reflection coefficient of the two ports. Then, if this two-port network is used for F1, it is possible to improve the stopband rejection of the filter by aligning the passband of the filter F1 with the required stopband. So even in figure 2 In the method of using filters F1 and F2 with smaller orders than tr...

Embodiment 3

[0038] Reference image 3 In this embodiment, a micro-acoustic resonator filter based on cancellation technology includes a hybrid coupler. The input port In, through port T, coupling port C, and isolation port ISO of the hybrid coupler are all connected differently. The two-port network connected to the input port In is also connected to the signal input terminal, and the two-port network connected to the through port T and the coupling port C are respectively connected to the load and grounded, and connected to the isolation port ISO The two-port network is also connected to a signal output terminal.

[0039] In this embodiment, the passband enhancement and stopband suppression of the filters F1 and F2 are realized by using a reflective filter.

[0040] image 3 The filters in the filter based on the hybrid coupler based on the duplexer and the hybrid coupler based on the single passband are shown, which are only applicable when these filters have multiple passbands. Application...

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Abstract

The invention discloses a filter and duplexer of a miniature acoustic resonator based on a cancellation technology. The device comprises two hybrid couplers which are connected with each other, each hybrid coupler comprises an input port In, a straight-through port T, a coupling port C and an isolation port ISO. Straight-through ports T of the two hybrid couplers are connected with each other, anda two-port network F1 is arranged between the straight-through ports T of the two hybrid couplers; coupling ports C of the two hybrid couplers are connected with each other, and a two-port network F2is arranged between the two hybrid couplers; input ports In of the two hybrid couplers are respectively connected with a two-port network F3 and a TX port, isolation ports ISO of the two hybrid couplers are respectively connected with an ANT and a load, and the two-port network F1, the two-port network F2 and the two-port network F3 are the same two-port network.

Description

Technical field [0001] The invention belongs to the field of electronic technology, and specifically is a filter and duplexer of a miniature acoustic resonator based on cancellation technology. Background technique [0002] As the consumer electronics industry has more and more stringent requirements for volume and performance, it is possible to embed miniature radio frequency modules with more functions in portable consumer electronic products. Due to the new communication standards, the distance between the information channel and the frequency band is getting closer, and the requirements for RF filters and duplexers are becoming more and more stringent. New communication devices, such as smart phones, occupy space and The cost must be very small because more components are needed to support multiple standards and applications, as well as coexisting communication systems where multiple communication transmitters and receivers work simultaneously. [0003] Radio frequency (RF) fi...

Claims

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Application Information

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IPC IPC(8): H03H9/46H03H9/64H03H9/70H03H9/72
CPCH03H9/64H03H9/462H03H9/706H03H9/725
Inventor 胡孝伟代文亮赵瑞洁
Owner XWAVE TECH (SHANGHAI) CO LTD
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