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System and method for radio-frequency filter

A filter and filter bank technology, applied in RF amplifiers, tunable filters, filters, etc., can solve problems such as high insertion loss, difficult design of fixed frequency demultiplexer filter design, and reduced reference sensitivity.

Active Publication Date: 2019-07-16
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of today's systems require flexible frequency plans and simultaneous processing of more than two channels, making fixed-frequency demultiplexer filter designs (with n frequency bands) difficult to design
[0006] Increasing complexity in RF front-ends (e.g. due to increased number of supported frequency bands) results in higher insertion loss, reduced reference sensitivity, and significantly increased area relative to physically implementing the front-end

Method used

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  • System and method for radio-frequency filter
  • System and method for radio-frequency filter
  • System and method for radio-frequency filter

Examples

Experimental program
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example 1

[0203] Example 1. A method of operating an RF system, the method comprising: filtering a first wideband RF signal using a wideband filter bank, filtering the first RF signal comprises separating the first wideband RF signal is a frequency cluster signal, wherein each of the frequency cluster signals includes a different frequency range, the first wideband RF signal includes a plurality of RF frequency bands, and each of the different frequency ranges includes a plurality of RF frequency bands of the plurality of RF frequency bands; performing band-stop filtering on at least one of the frequency cluster signals to produce a band-stop frequency cluster signal.

[0204] Example 2. The method of example 1, further comprising: amplifying the bandstop frequency cluster signal.

[0205] Example 3. The method of example 2, wherein amplifying the bandstop frequency cluster signal comprises: using a low noise amplifier (LNA).

example 4

[0206] Example 4. The method of one of examples 1 to 3, wherein bandstop filtering comprises using a tunable bandstop filter, and the method comprises adjusting a center frequency of the tunable bandstop filter.

[0207] Example 5. The method of example 4, wherein the first wideband RF signal comprises an interfering signal at a first interfering frequency, and adjusting the center frequency of the tunable bandstop filter comprises adjusting the center frequency to the first interfering frequency.

example 6

[0208] Example 6. The method of one of examples 1 to 5, wherein the wideband filter bank comprises a plurality of cascaded diplexers.

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Abstract

The invention discloses a system and a method for a radio-frequency filter. According to one embodiment, a method of operating an RF system includes filtering a first wideband RF signal using a wideband filter bank. Filtering the first RF signal includes separating the first wideband RF signal into frequency cluster signals, wherein each of the frequency cluster signals includes a different frequency range; the first wideband RF signal includes a number of RF frequency bands, and each of the different frequency ranges includes a plurality of RF frequency bands of the number of RF frequency bands. The method further includes band-stop filtering of at least one of the frequency cluster signals to produce a band-stop frequency cluster signals.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 595,898, filed December 7, 2017, and U.S. Provisional Application No. 62 / 641,664, filed March 12, 2018, which are hereby incorporated by reference in their entirety . [0003] This application is related to the following co-pending and commonly assigned patent applications: U.S. Patent Application filed, Attorney Docket No. INF 2018P 51521US; U.S. Patent Application filed, Attorney Docket No. INF 2018P 51522US; U.S. Patent Application filed, Attorney Docket No. INF 2018P 51842US; filed U.S. Patent Application, Attorney Docket No. INF 2018P 51843US, which is hereby incorporated by reference in its entirety. technical field [0004] The present invention relates generally to systems and methods, and in particular embodiments to systems and methods for radio frequency filters. Background technique [0005] In many RF systems, such as portable ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B1/40
CPCH04B1/40H04B1/005H03F3/195H03H3/02H03H9/0547H03H9/584H03H9/587H03H9/588H03H9/589H03H9/60H03H9/605H04B1/006H03H2009/02204H03H2210/026H03H9/547H03H9/585H03H7/0161H04B1/0475H04B1/525H03H9/542H03H2210/025H03H7/12H03H7/0115H03H9/205H03H9/131H03H7/0153H03H9/54H03H9/6479H03H9/52H10N30/853H03F2203/21157H03H11/1291H04B1/10H03H9/02015H03H9/175H03H9/48H03H9/0004H03H9/66H04B1/0057H04B1/50H03H7/463H03H2007/013H03F3/19H03F3/21H03F2200/222H03F2200/294H03F2200/451H03H9/70H04B1/1036H04B1/18H03H7/1741H03H9/02031H03J1/0008H03J3/20H03H9/02007
Inventor R·鲍德P·普凡S·施玛兹尔H-J·蒂默
Owner INFINEON TECH AG