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A Wide Adjustable Range Band-Stop Filter Device with Continuous Frequency Adjustable Characteristic

A band-stop filter and range technology, applied in the direction of impedance network, electrical components, multi-terminal pair network, etc., can solve the problems of unsatisfactory filter network effect, complicated frequency adjustment means, difficult continuous frequency adjustment, etc., and achieve improved adjustment means Complexity, reducing the number of frequency bands, improving integration and digitalization

Active Publication Date: 2022-06-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of the existing filter network with a reconfigurable wide adjustment range is not ideal, it is difficult to achieve continuous frequency adjustment, and the adjustment range is small, which cannot better meet the needs
In addition, the existing adjustable filter network frequency adjustment method is relatively complicated, which is not conducive to large-scale application in engineering

Method used

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  • A Wide Adjustable Range Band-Stop Filter Device with Continuous Frequency Adjustable Characteristic
  • A Wide Adjustable Range Band-Stop Filter Device with Continuous Frequency Adjustable Characteristic
  • A Wide Adjustable Range Band-Stop Filter Device with Continuous Frequency Adjustable Characteristic

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present invention are not limited to the provided examples.

[0022] In an embodiment of the present invention, a wide adjustable range band-stop filter device with continuously adjustable frequency characteristics includes a first filter circuit periodically loaded based on lumped parameters, see figure 1 Shown is a schematic diagram of the equivalent circuit of the first filter circuit in this embodiment, the first filter circuit is equivalent to: including a plurality of first resonator units cascaded through the first transmission main road, each first resonator unit It is an LC series resonant structure, and the coupling is realized through J converters periodically arranged on the first transmission main road, that is, a J converter is set on the first transmission main road between two adjacent first resonant units to ...

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Abstract

The invention discloses a wide adjustable range band-stop filter device with continuous frequency adjustable characteristics, which adopts the circuit structure of lumped parameter periodic loading technology and distributed periodic loading technology, and has the advantages of continuous adjustable center frequency To achieve, make full use of the working characteristics of the varactor diode, and change the capacitance value of the varactor diode by changing the DC power supply voltage of the varactor diode, and then adjust the center frequency. In order to improve the integration and digitization of the system, a digital control circuit is used to control the change of the central frequency, so as to improve the shortcomings of the existing frequency adjustment means on the whole and make the present invention better adapt to the engineering needs.

Description

technical field [0001] The invention relates to a communication filter device, in particular to a band-stop filter device with a wide adjustable range and continuous frequency adjustable characteristics. Background technique [0002] Filters are passive components commonly used in modern wireless communication networks. For example, in a radio frequency transceiver, it is necessary to use a filter to perform frequency-selective filtering on the received signal, and then make the required signal enter the next system unit, and finally realize the function set by the entire system. As an important component in the system, the effect of filter frequency selection will directly affect the performance of the entire system. [0003] Modern radar and wireless communication systems often require the working status of multiple frequency bands. In order to improve the integration and practicability of the system, a reconfigurable RF front-end is usually used now. However, the effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/12
CPCH03H7/12
Inventor 杨涛孙晓王沙飞杨健邵怀宗王勇李想齐亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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