CN217932046U - Pulse generator for airborne radar radiation signal test system - Google Patents
Pulse generator for airborne radar radiation signal test system Download PDFInfo
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- CN217932046U CN217932046U CN202221862489.XU CN202221862489U CN217932046U CN 217932046 U CN217932046 U CN 217932046U CN 202221862489 U CN202221862489 U CN 202221862489U CN 217932046 U CN217932046 U CN 217932046U
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Abstract
The utility model provides a pulse generator for airborne radar radiation signal test system, square pulse ripples generating circuit that has first operational amplifier and triangle wave pulse ripples generating circuit that has second operational amplifier including cascade connection. The square pulse wave generating circuit comprises a first capacitor, a first resistor, a second resistor, an adjustable resistor and a first operational amplifier; the triangular wave pulse wave generating circuit comprises a second capacitor, a third resistor, a sixth resistor and a second operational amplifier; a fourth resistor and a fifth resistor are connected in series between the square pulse wave generating circuit and the triangular pulse wave generating circuit, a diode is reversely connected between the fourth resistor and the fifth resistor, the positive end of the diode is grounded, and the negative end of the diode is connected between the fourth resistor and the fifth resistor. The utility model discloses a triangular wave pulse generator including preceding level's square wave pulse generator and back level, every pulse generator adopts operational amplifier to realize triangular wave pulse signal's formation, reduces the reliance to timer chip and MCU, reduce cost.
Description
Technical Field
The utility model relates to a radar simulation technical field particularly relates to a pulse generator for airborne radar radiated signal test system.
Background
The radar radiation signal test system realizes a key platform system for development and test of radar, replaces radar echo signals of actual objects in a simulation mode, realizes a simulation test from simulation occurrence of radar detection electromagnetic waves to sending-receiving of target emission echoes, and tests the performance of the radar.
The radar radiation signal test system generally comprises a transmitter simulation part and a receiver simulation part, wherein a transmitter simulation circuit mainly comprises a signal source, a clock synchronization part and a frequency synthesis module. The signal source is also called signal generator, pulse generator, is used for producing periodic signal such as square wave, sawtooth wave, sine wave, etc., it is the beginning of the analog circuit of the transmitter, it is the key circuit too, the general MCU controls the periodic signal output in the existing design, need to use the single MCU one-chip computer chip, it is unfavorable in the situation that the MCU supply of the present microprocessor is in short supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pulse generator for airborne radar radiation signal test system realizes the formation of triangle pulse waveform through using two operational amplifier, reduces use cost.
According to the utility model discloses the first aspect of purpose provides a pulse generator for airborne radar radiated signal test system, square pulse wave generating circuit that has first operational amplifier and triangular wave pulse wave generating circuit that has the second operational amplifier including cascade connection, wherein:
the square pulse wave generating circuit comprises a first capacitor, a first resistor, a second resistor, an adjustable resistor and a first operational amplifier;
the triangular wave pulse wave generating circuit comprises a second capacitor, a third resistor, a sixth resistor and a second operational amplifier;
a fourth resistor and a fifth resistor are connected in series between the square pulse wave generating circuit and the triangular pulse wave generating circuit, a diode is reversely connected between the fourth resistor and the fifth resistor, the positive end of the diode is grounded, and the negative end of the diode is connected between the fourth resistor and the fifth resistor.
According to above technical scheme, the utility model discloses a pulse generator for airborne radar radiation signal test system, the triangular wave pulse generator who adopts square wave pulse generator and the back level including the front level, every pulse generator adopts operational amplifier to realize, begin to charge to resistance through the condenser, its charge rate is decided by RC time constant, the generation of triangular wave pulse signal is realized in use through two operational amplifier, reduce the reliance to timer chip and MCU, reduce cost on the one hand, on the other hand reduces the reliance to as early as possible chip, improve national defense safety.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below may be considered as part of the inventive subject matter of this disclosure provided such concepts are not mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of a pulse generator for an airborne radar radiated signal test system according to an embodiment of the present invention.
Fig. 2 is a specific implementation example of the pulse generator for the airborne radar radiated signal testing system according to fig. 1.
Detailed Description
For a better understanding of the technical aspects of the present invention, specific embodiments are described below in conjunction with the appended drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
The pulse generator for the airborne radar radiated signal test system, which is combined with the embodiment shown in fig. 1 and 2, comprises a square pulse wave generating circuit 10 with a first operational amplifier and a triangular pulse wave generating circuit 20 with a second operational amplifier which are connected in series.
As shown in fig. 2, the square pulse wave generating circuit 10 includes a first capacitor C1, a first resistor R1, a second resistor R2, an adjustable resistor VR, and a first operational amplifier U1.
The triangular wave pulse wave generating circuit 20 includes a second capacitor C2, a third capacitor C3, a third resistor R3, a sixth resistor R6, and a second operational amplifier U2.
A fourth resistor R4 and a fifth resistor R5 are connected in series between the square pulse wave generating circuit 10 and the triangular pulse wave generating circuit 20, a diode D1 is reversely connected between the fourth resistor R4 and the fifth resistor R5, a positive end of the diode D1 is grounded, and a negative end is connected between the fourth resistor R4 and the fifth resistor R5.
As shown in fig. 2, one end of the first capacitor C1 is grounded, and the other end is connected to the negative input terminal of the first operational amplifier U1; one end of the second resistor R2 is grounded, and the other end of the second resistor R2 is connected to the positive input end of the first operational amplifier U1; the first resistor R1 is connected in series with the adjustable resistor VR and then respectively connected between the positive input end and the negative access section of the first operational amplifier U1; the output end of the first operational amplifier U1 is connected to the fourth resistor R4.
The capacitance value of the first capacitor C1 is 10uf, the resistance values of the first resistor R1 and the second resistor R2 are 75K Ω, and the resistance value range of the adjustable resistor VR is 75-120K Ω.
As shown in fig. 2, after being connected in series with the fifth resistor R5, the fourth resistor R4 is connected between the output terminal of the first operational amplifier U1 and the negative input terminal of the second operational amplifier U2; the resistance values of the fourth resistor R4 and the fifth resistor R5 are respectively 10K omega.
As shown in fig. 1 and 2, the second capacitor C2 and the third resistor R3 are connected in parallel and then respectively connected between the negative input end and the output end of the second operational amplifier U2; after the third capacitor C3 is connected in parallel with the sixth resistor R6, one end is grounded, and the other end is connected to the positive input end of the second operational amplifier U2.
The capacitance value range of the second capacitor C2 and the third capacitor C3 is 10uf; the resistance ranges of the third resistor R3 and the sixth resistor R6 are 75K Ω.
The diode D1 is a 1N4148 type diode.
The first operational amplifier U1 and the second operational amplifier U2 are the same and both employ UA741 type operational amplifiers.
Referring to fig. 2, pin 2 of the first operational amplifier U1 is a negative input terminal, pin 3 is a positive input terminal, pin 6 is an output terminal, and pins 1, 4, 5, and 7 are blank connections; pin 2 of the second operational amplifier U2 is a negative input, pin 3 is a positive input, pin 6 is an output, pin 7 is connected to the positive electrode of the power supply, pin 4 is connected to the negative electrode of the power supply, and pins 1 and 5 are blank. The power supply voltage connected to the pin 7 of the second operational amplifier U2 is 3-15VDC.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is well known in the art and can be modified and decorated without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. A pulse generator for an airborne radar radiated signal testing system, comprising a square pulse wave generating circuit (10) having a first operational amplifier and a triangular pulse wave generating circuit (20) having a second operational amplifier connected in cascade, wherein:
the square pulse wave generation circuit (10) comprises a first capacitor (C1), a first resistor (R1), a second resistor (R2), an adjustable resistor (VR) and a first operational amplifier (U1);
the triangular wave pulse wave generating circuit (20) comprises a second capacitor (C2), a third capacitor (C3), a third resistor (R3), a sixth resistor (R6) and a second operational amplifier (U2);
a fourth resistor (R4) and a fifth resistor (R5) are connected in series between the square pulse wave generating circuit (10) and the triangular pulse wave generating circuit (20), a diode (D1) is reversely connected between the fourth resistor (R4) and the fifth resistor (R5), the positive end of the diode (D1) is grounded, and the negative end is connected between the fourth resistor (R4) and the fifth resistor (R5).
2. The pulser for airborne radar radiometric signal testing system according to claim 1, characterized in that the first capacitor (C1) is connected to ground at one end and to the negative input of the first operational amplifier (U1) at the other end;
one end of the second resistor (R2) is grounded, and the other end of the second resistor is connected to the positive input end of the first operational amplifier (U1);
the first resistor (R1) is connected in series with the adjustable resistor (VR) and then respectively connected between the positive electrode input end and the negative electrode access section of the first operational amplifier (U1);
the output end of the first operational amplifier (U1) is connected with the fourth resistor (R4).
3. The pulse generator for the airborne radar radiometric signal testing system of claim 2, characterized in that the first capacitor (C1) has a capacitance of 10uf, the first resistor (R1) and the second resistor (R2) have a resistance of 75K Ω, and the adjustable resistor (VR) has a resistance in the range of 75-120K.
4. The pulse generator for the airborne radar radiated signal testing system according to claim 1, wherein the fourth resistor (R4) and the fifth resistor (R5) are connected in series and then respectively connected between the output end of the first operational amplifier (U1) and the negative input end of the second operational amplifier (U2);
the resistance values of the fourth resistor (R4) and the fifth resistor (R5) are respectively 10K omega.
5. The pulse generator for the airborne radar radiometric signal testing system according to claim 1, characterized in that, after being connected in parallel, the second capacitor (C2) and the third resistor (R3) are respectively connected between the negative input terminal and the output terminal of the second operational amplifier (U2);
and after the third capacitor (C3) is connected with the sixth resistor (R6) in parallel, one end of the third capacitor is grounded, and the other end of the third capacitor is connected to the positive input end of the second operational amplifier (U2).
6. The pulser for airborne radar radiometric signal testing system according to claim 5, characterized in that the second capacitor (C2) and the third capacitor (C3) have a capacitance value in the range of 10uf; the resistance value range of the third resistor (R3) and the sixth resistor (R6) is 75K omega.
7. The pulse generator for the airborne radar radiometric signal testing system of claim 2, wherein the diode is a type 1N4148 diode.
8. Impulse generator for an airborne radar radiometric signal testing system according to any of claims 1-7, characterized in that the first operational amplifier (U1) and the second operational amplifier (U2) are identical and both employ UA741 type operational amplifiers.
9. The pulser for an airborne radar radiometric signal testing system of claim 8, wherein pin 2 of the first operational amplifier (U1) is a negative input, pin 3 is a positive input, pin 6 is an output, pins 1, 4, 5, 7 are blank;
and a pin 2 of the second operational amplifier (U2) is a negative input end, a pin 3 is a positive input end, a pin 6 is an output end, a pin 7 is connected with the positive electrode of the power supply, a pin 4 is connected with the negative electrode of the power supply, and pins 1 and 5 are in idle connection.
10. The pulser for airborne radar radiometric signal testing system of claim 8, wherein pin 7 of the second operational amplifier (U2) is connected to a supply voltage of 3-15VDC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221862489.XU CN217932046U (en) | 2022-07-20 | 2022-07-20 | Pulse generator for airborne radar radiation signal test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221862489.XU CN217932046U (en) | 2022-07-20 | 2022-07-20 | Pulse generator for airborne radar radiation signal test system |
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| Publication Number | Publication Date |
|---|---|
| CN217932046U true CN217932046U (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221862489.XU Active CN217932046U (en) | 2022-07-20 | 2022-07-20 | Pulse generator for airborne radar radiation signal test system |
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| CN (1) | CN217932046U (en) |
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2022
- 2022-07-20 CN CN202221862489.XU patent/CN217932046U/en active Active
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