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Double-end constant-resistance filtering assembly

A filtering component and double-ended technology, which is applied in the field of communication, can solve the problems that the improvement effect of receiving signal-to-noise ratio and desensitization dynamic range is not obvious, and the filtering component cannot meet the constant impedance of ultra-wideband, and achieve good out-of-band suppression characteristics, Favorable effect of engineering application

Active Publication Date: 2020-05-05
TONG FANG ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in related technologies, the present invention proposes a double-terminal constant-resistance filter component, which solves the problem that the existing filter component cannot meet the requirement of constant impedance in ultra-wideband, and has no effect on improving the receiving signal-to-noise ratio and the dynamic range of desensitization. obvious problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a group of radio frequency signals enter the filter component from the input and output terminal 1, wherein a bypass channel with a cutoff frequency of f2=30MHz high-pass response is formed by capacitor C5, inductor L4 and the resistor R1, and the input radio frequency signal is higher than the frequency f2 The frequency components will flow into this branch and will be converted into heat consumption by resistor R1; the resistance, inductance and capacitance of each device here are as follows, R1=50Ω, R2=50Ω, L1=368nH, L2=481nH, L3 =368nH, L4=160nH, L5=160nH, C1=51pF, C2=180pF, C3=180pF, C4=51pF, C5=82pF, C6=82pF; Among them, the resistor R1 and the resistor R2 have the same resistance value, the inductance L1 and the inductance L3 has the same inductance, capacitor C1 has the same capacitance as capacitor C4, capacitor C2 has the same capacitance as capacitor C3, inductor L5 has the same inductance as inductor L4, and capacitor C5 has the sa...

Embodiment 2

[0032] Such as figure 1 As shown, the working cutoff frequency of this embodiment is 15MHz, and a group of radio frequency signals enter the filter assembly through the input and output terminal 1, wherein a capacitor C5, an inductance L4 and the resistor R1 form a cutoff frequency f2=15MHz high-pass response bypass The frequency components of the input RF signal higher than the frequency f2 will flow into this branch, and will be converted into heat consumption by the resistor R1; the resistance, inductance and capacitance of each device here are as follows, R1=50Ω, R2=50Ω , L1=725nH, L2=962nH, L3=725nH, L4=320nH, L5=320nH, C1=104pF, C2=360pF, C3=360pF, C4=104pF, C5=160pF, C6=160pF, among them, resistor R1 and Resistor R2 has the same resistance value, inductor L1 has the same value as inductor L3, capacitor C1 has the same value as capacitor C4, capacitor C2 has the same value as capacitor C3, inductor L5 has the same value as inductor L4, and capacitor C5 has the same value...

Embodiment 3

[0034] Such as figure 1 As shown, the working cutoff frequency of this embodiment is 15MHz, and a group of radio frequency signals enter the filter assembly through the input and output terminal 1, wherein a capacitor C5, an inductance L4 and the resistor R1 form a cutoff frequency f2=15MHz high-pass response bypass The frequency components of the input RF signal higher than the frequency f2 will flow into this branch, and will be converted into heat consumption by the resistor R1; the resistance, inductance and capacitance of each device here are as follows, R1=50Ω, R2=50Ω , L1=7.2uH, L2=1uH, L3=7.2uH, L4=320nH, L5=320nH, C1=1nF, C2=3.56nF, C3=3.56nF, C4=1nF, C5=1.6nF, C6=1.6nF , where the resistor R1 has the same resistance value as the resistor R2, the inductor L1 has the same value as the inductor L3, the capacitor C1 has the same value as the capacitor C4, the capacitor C2 has the same value as the capacitor C3, the inductor L5 has the same sensor value as the inductor L4...

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Abstract

The invention discloses a double-end constant-resistance filtering assembly, which comprises an input terminal 1, an output terminal 2, inductors L1, L2, L3, L4 and L5, and resistors R1 and R2. The input terminal 1 is connected with the input end of the inductor L1. The output end of the inductor L1 is connected with the input end of the inductor L2, the output end of the inductor L2 is connectedwith the input end of the inductor L3, and the output end of the inductor L3 is connected with the output terminal 2; the input ends of the inductors L1 and L4 are connected with a capacitor C1 in parallel, the output ends of the inductors L1 and L4 are connected with a capacitor C2 in parallel, the input ends of the inductors L3 and L5 are connected with a capacitor C3 in parallel, and the outputends of the inductors L3 and L5 are connected with a capacitor C4 in parallel. The resistor R1 and the capacitor C5 are connected in series and then connected to the two ends of the inductor L4 in parallel, and the resistor R2 and the capacitor C6 are connected in series and then connected to the two ends of the inductor L5 in parallel. The invention provides a double-end constant-resistance filtering assembly with an ultra-wideband response working frequency band, a good out-of-band rejection characteristic and any cut-off frequency filtering design.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a double-terminal constant-resistance filter assembly. Background technique [0002] With the rapid development of wireless communication technology, people pay more and more attention to high-performance receivers. RF receivers not only require high sensitivity, but also have higher requirements for performance indicators such as high linearity and desensitized dynamic range. Especially in the current situation where the noise of the electromagnetic communication environment is becoming more and more complex, the signal-to-noise ratio and desensitization dynamic range of the receiver will not only be significantly affected by external factors, but also closely related to its own mixing spurs and mixing intermodulation. [0003] A large number of engineering practices have shown that the constant resistance filter components are cascaded at the back end of the mixer in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/01
CPCH03H7/01
Inventor 姜杨彭志华鞠丽娟
Owner TONG FANG ELECTRONICS SCI & TECH
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