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Phase shift filtering device

A phase-shifting and filter technology, which is applied in the field of electromagnetic signal filtering, can solve problems such as interference with communication channel communication, and achieve the effect of strengthening robustness, improving the ability to resist electromagnetic interference, and suppressing electromagnetic noise

Active Publication Date: 2012-07-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the main purpose of the present invention is to provide a phase-shift filtering method, which is used to solve the problem that the adjacent frequency of the communication channel interferes with the communication of the communication channel, and realizes the high immunity of the communication channel to the adjacent frequency interference

Method used

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Examples

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Embodiment 1

[0061] figure 2 A schematic structural diagram of a phase-shift filtering device provided by an embodiment of the present invention. The device is applied in a communication system receiving / transmitting circuit to suppress adjacent frequency interference to a designated frequency band. The device includes: a phase adjustment module;

[0062] The phase adjustment module is used to adjust the phase difference of the two signals input from the input port, so that the phase difference of the two signals output by the module is 0 degrees in the specified frequency band, and the phase difference outside the specified frequency band is 180 degrees; Or the phase difference within the specified frequency band is 180 degrees, and the phase difference outside the specified frequency band is 0 degrees.

[0063] The phase adjustment module has dual input ports and dual output ports, and two sets of dual ports are respectively used to connect with other components to realize the function ...

Embodiment 2

[0067] image 3 A schematic structural diagram of another phase-shift filtering device provided by an embodiment of the present invention, the device includes: a dual-port signal receiving / transmitting module and a phase adjustment module, wherein:

[0068] Dual-port signal receiving / sending module, used to receive / transmit dual-port signals;

[0069] The phase adjustment module is used to adjust the phase difference of the signals of the two output ports of the dual-port signal receiving / transmitting module, so that the adjusted two-way output signals are equal to or close to 180 degrees in the specified frequency band, and in the specified frequency band It is equal to or close to 0 degrees outside; or adjust the phase difference of the signals of the two output ports of the dual-port signal receiving / transmitting module to be equal to or close to 0 degrees in the specified frequency band, and equal to or close to 180 degrees outside the specified frequency band .

[0070]...

Embodiment 3

[0080] Figure 8 A schematic structural diagram of a phase-shift filtering device provided by an embodiment of the present invention, the device includes: a power decomposition module and a phase adjustment module, wherein:

[0081] The power decomposition module is used to divide the received single-channel signal into two-channel signals with equal power, and the present invention does not require the phase of the two-channel signals. The device used as the power decomposition module may be a power splitter, a balun (Balun, balanced-unbalanced converter), or other devices that can divide power equally.

[0082] A phase adjustment module, configured to receive the two-way signals output by the power decomposition module, and adjust the phase difference of the two-way signals to be equal to or close to 180 degrees in a specified frequency band, and equal to or close to 0 degrees outside the specified frequency band; Or adjust the phase difference of the two signals to be equa...

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PUM

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Abstract

The invention discloses a phase shift filtering method, which is used for solving the problem that the frequency near a communication channel interferes in the communication of the communication channel. In a signal receiving system, a phase difference of signals in two input ports in an appointed frequency band and outside the appointed frequency band is regulated by using a phase regulation module, so that the phase different in the appointed frequency band is 0 DEG, the phase difference outside the appointed frequency band is 180 DEG; or the phase difference in the appointed frequency band is 180 DEG, and the phase difference outside the appointed frequency band is 0 DEG, then frequency signals outside the appointed frequency band where the communication channel occupies are removed through filtration of a power synthesis module, thus in-band electromagnetic noise is removed through filtration, and anti-electromagnetic interference capability of an equipment receiving system is improved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic signal filtering, in particular to a phase-shifting filtering method. Background technique [0002] In the current communication system, the scope of filtering radio frequency noise is only limited to the filtering of radio frequency noise within the passband of the communication frequency band. figure 1 It is an example of the structure of a transmission and reception scheme of a communication system in the prior art. Among them, in the receiving circuit of the system, the first filter is a band-pass filter, and the signal that it can filter out is the frequency band other than the receiving frequency band occupied by the whole system, that is, the electromagnetic signal of the out-of-band frequency band. It is a fairly wide frequency band. When there are multiple communication channels in the band, there will be adjacent frequency interference between the communication channels, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B1/16
CPCH04B1/123H04B1/10
Inventor 何文卿何经纬
Owner ZTE CORP
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