CN219552548U - Narrow pulse power detection circuit - Google Patents
Narrow pulse power detection circuit Download PDFInfo
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- CN219552548U CN219552548U CN202320665394.7U CN202320665394U CN219552548U CN 219552548 U CN219552548 U CN 219552548U CN 202320665394 U CN202320665394 U CN 202320665394U CN 219552548 U CN219552548 U CN 219552548U
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Abstract
The utility model relates to the technical field of radio frequency, in particular to a narrow pulse power detection circuit, which comprises: the voltage sampling circuit comprises a narrow pulse signal input end, a radio frequency detector, a switching diode, a first resistor and a capacitor which are connected in sequence, wherein a first connection point is formed between the first resistor and the capacitor; the detection module is connected with the first connecting point and comprises a micro control unit; the discharging circuit comprises a second resistor, a third resistor, a fourth resistor and a triode, wherein one end of the second resistor is connected with the collector electrode of the triode, the other end of the second resistor is connected with the first connecting point, one end of the third resistor is connected with the base electrode of the triode, the other end of the third resistor is connected with the first output end of the micro-control unit, one end of the fourth resistor is connected with the base electrode of the triode, the other end of the fourth resistor is grounded, the emitter electrode of the triode is grounded, a narrow pulse signal can be collected and stored through the voltage sampling circuit, and the micro-control unit is adopted to replace the original FPGA to perform signal processing, so that resources are effectively saved.
Description
Technical Field
The utility model relates to the technical field of radio frequency, in particular to a narrow pulse power detection circuit.
Background
The power amplification circuit can be widely applied to various fields such as pulse radars, phased array radars, remote control and the like. In addition, the pulse power amplifier is a key part in the communication system, so that the output power of the power amplifier is often required to be detected in order to protect the operation stability of the whole system, the accurate power detection can determine the current working state of the equipment, and particularly, the overload operation of the amplifier and other accessory equipment for a long time can be ensured.
In the prior art, for the detection of the radio frequency pulse power with the pulse width smaller than 100nS, a complex circuit structure such as an FPGA is needed, so that the cost is high, and resources are consumed by adopting the circuit.
Therefore, how to realize the power detection of the narrow pulse width signal by a simple circuit to reduce the resource consumption is a technical problem to be solved.
Disclosure of Invention
In view of the above, the present utility model provides a narrow pulse power detection circuit that overcomes or at least partially solves the above-mentioned problems.
In a first aspect, an embodiment of the present utility model provides a narrow pulse power detection circuit, including:
the voltage sampling circuit comprises a narrow pulse signal input end, a radio frequency detector, a switching diode, a first resistor and a capacitor which are connected in sequence, wherein a first connection point is formed between the first resistor and the capacitor;
the detection module is connected with the first connecting point and comprises a micro control unit;
the discharging circuit comprises a second resistor, a third resistor, a fourth resistor and a triode, wherein one end of the second resistor is connected with the collector electrode of the triode, the other end of the second resistor is connected with the first connecting point, one end of the third resistor is connected with the base electrode of the triode, the other end of the third resistor is connected with the first output end of the micro control unit, one end of the fourth resistor is connected with the base electrode of the triode, the other end of the fourth resistor is grounded, and the emitter electrode of the triode is grounded.
Preferably, the detection module further comprises: and the voltage follower is connected between the first connection point and the micro control unit.
Preferably, the voltage follower includes a normal phase input end, a reverse phase input end and a second output end, the normal phase input end is connected with the first connection point, and the second output end is connected with the reverse phase output end and the input end of the micro control unit.
Preferably, the micro control unit includes: the data processing circuit is connected to the third output end of the analog-to-digital conversion circuit.
Preferably, the method further comprises, between the narrow pulse signal input terminal and the radio frequency detector: a coupler.
Preferably, the pulse width of the narrow pulse signal input by the narrow pulse signal input end is 10 nS-100 nS.
Preferably, the radio frequency detector is of the model ADL5511.
Preferably, the switching diode is of the type LBAS516T1G.
One or more technical solutions in the embodiments of the present utility model at least have the following technical effects or advantages:
the utility model provides a narrow pulse power detection circuit, which comprises: the voltage sampling circuit comprises a narrow pulse signal input end, a radio frequency detector, a switching diode, a first resistor and a capacitor which are connected in sequence, wherein a first connection point is formed between the first resistor and the capacitor; the detection module is connected with the first connecting point and comprises a micro-control unit, a discharging circuit, the micro-control unit comprises a second resistor, a third resistor, a fourth resistor and a triode, one end of the second resistor is connected with the collector of the triode, the other end of the second resistor is connected with the first connecting point, one end of the third resistor is connected with the base of the triode, the other end of the third resistor is connected with the first output end of the element of the micro-control unit, one end of the fourth resistor is connected with the base of the triode, the other end of the fourth resistor is grounded, the emitter of the triode is grounded, a narrow pulse signal can be collected and stored through the voltage sampling circuit, the micro-control unit is used for replacing the original FPGA to perform signal processing, and resources are effectively saved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also throughout the drawings, like reference numerals are used to designate like parts. In the drawings:
fig. 1 shows a schematic diagram of a narrow pulse power detection circuit in an embodiment of the utility model.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
An embodiment of the present utility model provides a narrow pulse power detection circuit, as shown in fig. 1, including: the voltage sampling circuit 101 comprises a narrow pulse signal input end, a radio frequency detector U1, a switching diode D1, a first resistor R1 and a capacitor C1 which are connected in sequence, wherein a first connection point P is formed between the first resistor R1 and the capacitor;
the detection module 102 is connected with the first connection point P and comprises a micro control unit U4;
the discharging circuit 103 comprises a second resistor R2, a third resistor R3, a fourth resistor R4 and a triode U2, wherein one end of the second resistor R2 is connected with a collector C of the triode U2, the other end of the second resistor R2 is connected with a first connecting point P, one end of the third resistor R3 is connected with a base B of the triode U2, the other end of the third resistor R3 is connected with a first output end of the micro-control unit U4, one end of the fourth resistor R4 is connected with the base B of the triode U2, the other end of the fourth resistor R4 is grounded, and an emitter E of the triode is grounded.
In a specific embodiment, the voltage sampling circuit 101 samples a radio frequency signal, specifically, a narrowband pulse signal, where the narrowband pulse signal has a pulse width of 10nS to 100nS.
The voltage sampling circuit 101 specifically includes a narrow pulse signal input end, a radio frequency detector U1, a switching diode D1, a first resistor R1, and a capacitor C1, which are sequentially connected, wherein a first connection point P is formed between the first resistor R1 and the capacitor C1.
In an alternative embodiment, the radio frequency detector U1 further comprises, between the narrow pulse signal input terminal and the radio frequency detector: and the coupler is used for converting the high-power radio frequency signal input by the narrow pulse signal input end into a low-power radio frequency signal.
In order to calculate the power of the radio frequency signal, the low-power radio frequency signal is then passed through the radio frequency detector U1, so that the low-power radio frequency signal is converted into a voltage signal having a certain relationship with the low-power radio frequency signal, and then the voltage signal is passed through the first connection point P to the detection module 102, and the detection module 102 processes the voltage signal to obtain the power of the radio frequency signal.
In this process, in order to obtain a radio frequency signal with a narrow pulse, the radio frequency detector U1 must select a device with a sufficiently fast response speed, so, in order to ensure that a signal meeting a pulse width of 10nS can be detected, the radio frequency detector U1 is of the type ADL5511, and has an impulse response time of less than 4nS, and a corresponding power detection range reaches 47dB.
In order to respond to the fast pulse voltage signal, a switching diode LBAS516T1G is used after the radio frequency detector U1, the pulse response time is also less than 4nS, the resistance of the switching diode LBAS516T1G is small under the forward voltage action in the on state, which corresponds to an on switch, and the resistance is large in the off state, which corresponds to an off switch. When the radio frequency detector U1 outputs a voltage signal, if the voltage signal is greater than the voltage of the end of the capacitor C1, the switch diode D1 is turned on, the voltage signal output by the radio frequency detector U1 charges the capacitor C1 through the switch diode D1 and the first resistor R1 until the voltage on the capacitor C1 is consistent with the voltage signal output by the radio frequency detector U1, and then the charging is stopped.
When the voltage signal output by the radio frequency detector U1 disappears, the forward voltage of the switching diode D1 is smaller than the reverse voltage, the switching diode D1 is cut off, and the voltage of the capacitor C1 is kept unchanged.
The detection module 102 is connected to a first connection point P, and includes a micro control unit U4 (MCU). The detection module 104 further includes: a voltage follower U3, the voltage follower U3 being connected between the first connection point P and the micro control unit U4. The input end of the voltage follower U3 has the characteristic of high resistance, and can cut off the influence of the micro control unit U4 on the voltage on the capacitor C1.
The voltage follower U3 comprises a forward input end, a reverse input end and a second output end, wherein the forward input end is connected with the first connecting point P, and the second output end is connected with the reverse input end and the input end of the micro-control unit.
The micro control unit U4 specifically comprises an analog-to-digital conversion circuit and a data processing circuit, and the data processing circuit is connected to a third output end of the analog-to-digital conversion circuit. Therefore, the analog-to-digital conversion circuit in the micro control unit U4 performs the slave analog-to-digital conversion on the input voltage to obtain a digital signal, and the data processing circuit calculates and compensates the digital signal to obtain a corresponding power value.
As a result of the above-described data sampling, the discharge circuit 103 is controlled by the micro control unit U4 to discharge the capacitor C1 for the purpose of realizing the sampling a plurality of times. After the micro control unit U4 controls the capacitor C1 to discharge, the voltage of the capacitor C1 is 0, and when the radio frequency signal arrives next time, sampling can be performed again, and the capacitor C1 is charged. If the voltage of the capacitor C1 is not discharged, when the radio frequency signal is detected by the radio frequency detector U1 to output the voltage, the switching diode D1 is in an off state, and the new voltage signal cannot be sampled again.
In order to ensure that the capacitor C1 is continuously discharged, the narrow pulse power detection circuit includes a discharge current 103, where the discharge circuit 103 includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a triode U2, where one end of the second resistor R2 is connected to a collector C of the triode U2, the other end of the second resistor R2 is connected to a first connection point P, one end of the third resistor R3 is connected to a base B of the triode U2, the other end of the third resistor R3 is connected to a first output end of the micro control unit U4, one end of the fourth resistor R4 is connected to a base B of the triode U2, the other end of the fourth resistor is grounded, and an emitter D of the triode U2 is grounded.
When the micro control unit U4 outputs a high level, the triode U2 is in a conducting state, the capacitor C1 discharges, the discharging is realized through the second resistor R2 and the triode U2 to the ground, when the micro control unit U4 outputs a low level, the triode U2 is in a disconnected state, the discharging of the capacitor C1 is stopped, wherein the size of the second resistor R2 controls the discharging time, and the smaller the resistance value of the second resistor R2 is, the faster the discharging speed is. Thus, complete pulse power detection can be achieved.
One or more technical solutions in the embodiments of the present utility model at least have the following technical effects or advantages:
the utility model provides a narrow pulse power detection circuit, which comprises: the voltage sampling circuit comprises a narrow pulse signal input end, a radio frequency detector, a switching diode, a first resistor and a capacitor which are connected in sequence, wherein a first connection point is formed between the first resistor and the capacitor; the detection module is connected with the first connecting point and comprises a micro-control unit, a discharging circuit, the micro-control unit comprises a second resistor, a third resistor, a fourth resistor and a triode, one end of the second resistor is connected with the collector of the triode, the other end of the second resistor is connected with the first connecting point, one end of the third resistor is connected with the base of the triode, the other end of the third resistor is connected with the first output end of the element of the micro-control unit, one end of the fourth resistor is connected with the base of the triode, the other end of the fourth resistor is grounded, the emitter of the triode is grounded, a narrow pulse signal can be collected and stored through the voltage sampling circuit, the micro-control unit is used for replacing the original FPGA to perform signal processing, and resources are effectively saved.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A narrow pulse power detection circuit, comprising:
the voltage sampling circuit comprises a narrow pulse signal input end, a radio frequency detector, a switching diode, a first resistor and a capacitor which are connected in sequence, wherein a first connection point is formed between the first resistor and the capacitor;
the detection module is connected with the first connecting point and comprises a micro control unit;
the discharging circuit comprises a second resistor, a third resistor, a fourth resistor and a triode, wherein one end of the second resistor is connected with the collector electrode of the triode, the other end of the second resistor is connected with the first connecting point, one end of the third resistor is connected with the base electrode of the triode, the other end of the third resistor is connected with the first output end of the micro control unit, one end of the fourth resistor is connected with the base electrode of the triode, the other end of the fourth resistor is grounded, and the emitter electrode of the triode is grounded.
2. The narrow pulse power detection circuit of claim 1, wherein the detection module further comprises: and the voltage follower is connected between the first connection point and the micro control unit.
3. The narrow pulse power detection circuit of claim 2, wherein the voltage follower comprises a normal phase input terminal, a reverse phase input terminal, and a second output terminal, the normal phase input terminal being connected to the first connection point, the second output terminal being connected to the reverse phase output terminal and the input terminal of the micro control unit.
4. The narrow pulse power detection circuit of claim 1, wherein the micro-control unit comprises: the data processing circuit is connected to the third output end of the analog-to-digital conversion circuit.
5. The narrow pulse power detection circuit of claim 1, further comprising, between the narrow pulse signal input and the radio frequency detector: a coupler.
6. The narrow pulse power detecting circuit according to claim 1, wherein the pulse width of the narrow pulse signal inputted from the narrow pulse signal input terminal is 10nS to 100nS.
7. The narrow pulse power detection circuit of claim 1, wherein said radio frequency detector is of the type ADL5511.
8. The narrow pulse power detection circuit of claim 1, wherein the switching diode is of a type LBAS516T1G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320665394.7U CN219552548U (en) | 2023-03-30 | 2023-03-30 | Narrow pulse power detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320665394.7U CN219552548U (en) | 2023-03-30 | 2023-03-30 | Narrow pulse power detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219552548U true CN219552548U (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320665394.7U Active CN219552548U (en) | 2023-03-30 | 2023-03-30 | Narrow pulse power detection circuit |
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| Country | Link |
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| CN (1) | CN219552548U (en) |
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- 2023-03-30 CN CN202320665394.7U patent/CN219552548U/en active Active
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