A radio frequency measurement device with a variable attenuator

A radio frequency measurement and attenuator technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of complex control circuits, inability to achieve broadband continuous attenuation, insufficient attenuation, etc., to achieve simple control circuits and improve low-frequency Frequency response, improvement of insertion loss and effect of standing waves

Active Publication Date: 2017-08-25
RIGOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a radio frequency measurement device with a variable attenuator, which is used to solve the defects that the prior art cannot realize continuous wideband attenuation, and the attenuation is not enough, and the control circuit is complicated

Method used

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  • A radio frequency measurement device with a variable attenuator
  • A radio frequency measurement device with a variable attenuator
  • A radio frequency measurement device with a variable attenuator

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0035] A radio frequency measurement device with a variable attenuator provided by an embodiment of the present invention, such as figure 1 as shown,

[0036] The measuring device comprises: an automatic level control circuit (ALC) with a variable attenuator 101; the output signal 1F of the automatic level control circuit (ALC) controls the variable attenuator to attenuate;

[0037] specific, figure 1 1A is the RF input, and it is output through 1F after passing through the ALC loop. The amplitude of the radio frequency input 1A changes with the change of the input frequency, and the radi...

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Abstract

The embodiment of the present invention discloses a radio frequency measurement device with a variable attenuator, wherein the measurement device includes: an automatic level control circuit with a variable attenuator; an output signal control circuit of the automatic level control circuit The variable attenuator performs attenuation; the variable attenuator includes: a diode group, and a low-frequency matching section; the diode group includes: at least two diodes connected in series in the same direction; the forward end of the diode group is connected The output end of the variable attenuator, the negative end of the diode group is connected to the input end of the variable attenuator; one end of the low frequency matching section is set between the two diodes, and the other end is grounded; The low-frequency matching section is an RLC circuit, and the RLC circuit includes: series resistance, inductance and capacitance. The present invention realizes wide-band continuous attenuation, greatly increases attenuation, and has the characteristics of a very simple control circuit.

Description

technical field [0001] The invention relates to the field of test and measurement, in particular to a radio frequency measurement device with a variable attenuator. Background technique [0002] In the field of test and measurement, the RF signal source is one of the necessary test and measurement instruments for RF and microwave workers. It can output RF signals of different frequency ranges according to the user's settings. It mainly outputs continuous wave (CW) RF signals. Of course With the development of radar and other technologies, higher requirements are put forward for the radio frequency signal source, and it is also required to be able to output pulse signals. [0003] In the prior art, in order to realize attenuation and modulation, there is an attenuator circuit composed of several switch PIN diodes connected in parallel and several attenuators connected in series. The attenuation of this circuit is large and the response speed is fast. But the disadvantage is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B17/318
Inventor 罗浚洲何毅军王悦王铁军李维森
Owner RIGOL
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