CN212932776U

CN212932776U - High-power detection circuit

Info

Publication number: CN212932776U
Application number: CN202022017529.8U
Authority: CN
Inventors: 黄磊; 王文军; 蒲林
Original assignee: Beijing Metta Electronic Technology Development Co ltd
Current assignee: Beijing Metta Electronic Technology Development Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-04-09
Anticipated expiration: 2030-09-15

Abstract

The utility model relates to a signal power detects technical field, concretely relates to high-power detection circuit, including the wave detector, detection circuit still includes power numerical control attenuator, power numerical control attenuator inserts high-power signal to the decay becomes the low-power signal input and cuts the signal voltage amplitude of wave to the amplitude limiter, finally passes through input to the wave detector behind the amplitude limiter, output after obtaining video signal. The utility model provides a formerly when based on using detectors commonly used such as diode or triode, can't carry out detection measuring problem to the signal that surpasss 0.2 watts, add high-power numerical control attenuator before the detector, through adjusting high-power numerical control attenuator's attenuation value, make detector saturated power can reach more than 100 watts, satisfy the demand to high-power signal measurement.

Description

High-power detection circuit

Technical Field

The utility model relates to a signal power detects technical field, concretely relates to high-power detection circuit.

Background

The detector can accurately measure the power of the signal within the linear dynamic range, and if the amplitude of the signal to be measured is too large, the detector enters a saturated state, the power of the signal cannot be truly reflected, and even the detector can be damaged.

At present, based on a diode or a triode and other common detectors, the saturation power is too low (generally not more than 0.2 watt), the novel detection circuit is provided, a high-power numerical control attenuator is added in front of the detector, and the saturation power of the detector can reach more than 100 watt by adjusting the attenuation value of the high-power numerical control attenuator, so that the requirement for measuring high-power signals is met.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model discloses a high-power detection circuit for when solving before based on using detectors commonly used such as diode or triode, can't detect the measuring problem to the signal that exceeds 0.2 watts.

The utility model discloses a following technical scheme realizes:

the utility model discloses a high-power detection circuit, including the wave detector, detection circuit includes power numerical control attenuator, power numerical control attenuator inserts high-power signal to the decay becomes the low-power signal input and cuts the signal voltage amplitude of wave to the amplitude limiter, finally passes through input to the wave detector behind the amplitude limiter, obtain video signal back output.

Furthermore, the power numerical control attenuator is a 60dB high-power numerical control attenuator, the bearing power of the power numerical control attenuator is 200 watts, and the attenuation step is 10 dB.

Further, the low-power signal power value is 20dB lower than the threshold level of the amplitude limiter and enters the linear power detection range of the detector.

Furthermore, the amplitude limiter is a high-power amplitude limiter, the bearing power of the amplitude limiter is 200 watts, and the amplitude limiting power output is less than or equal to 15 dBm.

Furthermore, after the amplitude limiter flattens the amplitude of the signal voltage, the amplitude of the output signal is limited to be lower than the amplitude limiting level.

The utility model has the advantages that:

the utility model discloses add high-power numerical control attenuator before the wave detector, through adjusting high-power numerical control attenuator's attenuation value, make wave detector saturated power can reach more than 100 watts, satisfy the demand to high-power signal measurement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a high power detector circuit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

The embodiment discloses a high-power detection circuit shown in fig. 1, which comprises a detector, wherein the detection circuit comprises a power numerical control attenuator, the power numerical control attenuator is connected with a high-power signal and attenuated into a low-power signal, the low-power signal is input into an amplitude limiter to flatten the voltage amplitude of the signal, and finally the low-power signal passes through the amplitude limiter and is input into the detector to obtain a video signal and then is output.

The power numerical control attenuator is a 60dB high-power numerical control attenuator, the bearing power of the power numerical control attenuator is 200W, and the attenuation step is 10 dB.

The low power signal power value is 20dB below the threshold level of the limiter and has entered the detector linear power detection range.

The amplitude limiter is a high-power amplitude limiter, the bearing power of the amplitude limiter is 200 watts, and the amplitude limiting power output is less than or equal to 15 dBm. After the amplitude limiter flattens the amplitude of the signal voltage, the amplitude of the output signal is limited to be lower than the amplitude limiting level.

The detector solves the problems that the saturation power of the conventional detector based on a diode or a triode and the like is too low, the power of a signal cannot be truly reflected, and even the detector can be damaged, and meets the requirement for high-power signal measurement.

Example 2

The embodiment discloses a detection method of a high-power detection circuit, before measuring a high-power signal, a high-power numerical control attenuator is set to be a proper attenuation value, then the signal is input to a detector for power detection, the high-power signal is attenuated into a low-power signal by the high-power numerical control attenuator at the moment, the signal power enters the linear power detection range of the detector and is far lower than the threshold level of an amplitude limiter, and the power value converted according to detection voltage is added with the attenuation value of the high-power numerical control attenuator and the insertion loss value of the high-power numerical control attenuator to obtain the power value of the current high-power signal.

When measuring the small power signal, the high-power numerical control attenuator can be set to be in a non-attenuation state, the small power signal is directly measured, and the power value converted according to the detection voltage and the insertion loss value of the high-power numerical control attenuator are the power value of the current small power signal.

The high-power amplitude limiter in the link is used for preventing a high-power numerical control attenuator from being incorrectly set due to misoperation when high-power measurement is carried out, and a high-power signal enters the detector to burn the detector.

The circuit index comparison table of the detector is as follows compared with the original common detector circuit indexes based on diodes or triodes and the like:

example 3

The functional components of the high-power detection circuit introduced in this embodiment are specifically as follows:

60dB high-power numerical control attenuator bears power: 200 watts (continuous wave), attenuation steps: 10 dB. The main function is to attenuate the high-power signal into a low-power signal, so that the power value of the low-power signal is lower than the threshold level of the amplitude limiter by less than 20dB and enters the linear power detection range of the detector, thereby ensuring the accuracy of the detection value.

A high-power amplitude limiter: bearing power: 200 watts (continuous wave), clipping power output: less than or equal to 15 dBm. The main function of the limiter is to limit the amplitude of the output signal within a certain range, that is, when the amplitude of the input signal exceeds the threshold level of the limiter, the amplitude of the output signal of the limiter will be limited to a certain level (called the clipping level) and will not change with the amplitude change of the input signal, so as to protect the following devices from being damaged by the high-power signal.

A detector: devices that extract the modulated signal from the modulated wave may also be used to detect the magnitude of the signal.

In conclusion, the detection circuit provided by the invention realizes direct detection on high-power signals of up to 100 watts, and solves the problem that signals of more than 0.2 watt cannot be detected and measured when a conventional detector such as a diode or a triode is used. The saturated power of the detector can reach more than 100 watts by adjusting the attenuation value of the high-power numerical control attenuator, and the requirement on high-power signal measurement is met.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A high-power detection circuit comprises a detector and is characterized in that the detection circuit comprises a power numerical control attenuator, the power numerical control attenuator is connected with a high-power signal and attenuated into a low-power signal, the low-power signal is input to an amplitude limiter to flatten the voltage amplitude of the signal, and finally the low-power signal passes through the amplitude limiter and is input to the detector to obtain a video signal and then is output.

2. The high power detector circuit of claim 1, wherein the digitally controlled power attenuator is a 60dB digitally controlled power attenuator, wherein the digitally controlled power attenuator is subjected to 200 watts of power and has an attenuation step of 10 dB.

3. The high power detector circuit of claim 1, wherein the low power signal power value is 20dB below the limiter threshold level and has entered the detector linear power detection range.

4. The high power detector circuit of claim 1, wherein the limiter is a high power limiter, the limiter has a 200 watt power, and the limited power output is less than or equal to 15 dBm.

5. The power detector circuit of claim 4, wherein the amplitude of the output signal is limited to below the clipping level after the clipping circuit clips the amplitude of the signal voltage.