CN217932041U - Frequency synthesizer module for radar radiation simulation - Google Patents
Frequency synthesizer module for radar radiation simulation Download PDFInfo
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- CN217932041U CN217932041U CN202221910261.3U CN202221910261U CN217932041U CN 217932041 U CN217932041 U CN 217932041U CN 202221910261 U CN202221910261 U CN 202221910261U CN 217932041 U CN217932041 U CN 217932041U
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Abstract
The utility model provides a frequently combine module for radar radiation simulation, divide ware and first mixer and second mixer including VCO module, doubling of frequency amplifier, MEMS wave filter, merit. The second input end of the first frequency mixer is connected to a first output interface of the radar waveform generating circuit, and the first output interface outputs triangular pulse waves; the second input end of the second mixer is connected to the second output interface of the radar waveform generating circuit, and the first output interface outputs square wave pulse waves. The utility model provides a module is synthesized frequently for radar radiation simulation produces two tunnel outputs through preceding stage waveform generator, wherein is the square pulse waveform of direct output all the way, and another way is exported to the trigger through sequential control circuit control chronogenesis, through trigger output triangular pulse waveform, realizes reliable and stable multivibration output, reduces the distortion, and two pulse waveforms send into the mixer that corresponds respectively and carry out the frequency synthesis, realize modulating output radar detection waveform respectively.
Description
Technical Field
The utility model relates to a radar simulation technical field particularly relates to a module is combined frequently for radar radiation simulation.
Background
The radar detects the transmitted electromagnetic wave, belongs to modulated electromagnetic wave, the amplitude and the frequency of the electromagnetic wave can be modulated to form a modulated signal, the modulated signal is transmitted towards a certain direction through the transmitting antenna, and the existence of a target is detected. And (3) outputting a target detection result by amplifying, denoising and signal processing the radar echo signal reflected by the detection target.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a frequency is combined module for radar radiation simulation, divide ware and first mixer and second mixer including VCO module, doubling of frequency amplifier, MEMS wave filter, merit, realize the mixing output to the radar wave form, wherein:
the VCO module is used for generating local oscillator clock signals of 370-775 MHz;
the frequency doubling amplifier is connected with the VCO module packaged in a modularized way and used for performing frequency doubling broadening on a local oscillator clock signal to generate a broadband frequency doubling signal of 740 MHz-1.55 GHz;
the MEMS filter is connected with the output end of the frequency doubling amplifier and is used for filtering baseband signals in the broadband frequency doubling signals;
the power divider adopts a one-to-two power divider and comprises an input end and two paths of output ends, wherein the input end of the power divider is connected with the output end of the MEMS filter, the first path of output end is connected with the first input end of the first frequency mixer, and the second path of output end is connected with the first input end of the second frequency mixer;
a second input end of the first frequency mixer is connected to a first output interface of the radar waveform generating circuit, and the first output interface outputs triangular pulse waves;
and a second input end of the second mixer is connected to a second output interface of the radar waveform generating circuit, and the first output interface outputs square wave pulse waves.
In a preferred embodiment, the radar waveform generating circuit includes a pre-stage waveform generator, an output end of the pre-stage waveform generator is input to a second input end of the first mixer through a first path, the first path includes a cascaded timing control circuit and an RS flip-flop, the timing control circuit is configured to control level signals output to R and S input ends of the RS flip-flop, and a Q port of the RS flip-flop outputs a triangular pulse wave as a first output interface of the radar waveform generating circuit;
the output end of the preceding-stage waveform generator is input into the second input end of the second mixer through a second path, the second path comprises a resistor and a protection diode which are connected in parallel, the resistor and the protection diode are connected between the output end of the preceding-stage waveform generator and the second input end of the second mixer after being connected in parallel, and the second path is used as a second output interface of the radar waveform generating circuit to output square wave pulse waves.
Compared with the prior art, the utility model provides a module is synthesized frequently for radar radiation simulation produces two tunnel outputs through preceding stage waveform generator, wherein is the square pulse waveform of direct output all the way, and another way is exported to the trigger through sequential control circuit control chronogenesis, through trigger output triangular pulse waveform, realizes reliable and stable multivibration output, reduces distortion and stable frequency signal, and two pulse waveform send into corresponding mixer respectively and carry out the frequency synthesis, realize modulating output radar detection waveform respectively.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are 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 according to 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 frequency synthesizer module for radar radiation simulation according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a radar waveform generation circuit of an embodiment of the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying 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 frequency synthesizer module for radar radiation simulation in the embodiment shown in fig. 1 and 2 includes a VCO module, a frequency multiplier amplifier, a MEMS filter, a power divider, and a first mixer and a second mixer, and implements frequency mixing output of radar waveforms.
The VCO module adopts a CRBV55BE series integrated VCO chip packaged in a modularization mode, the tuning voltage range is 0-12V, the tuning sensitivity reaches 0.5MHz/V, and the VCO module is used for generating local oscillator clock signals of 370-775 MHz.
And the frequency doubling amplifier adopts a frequency doubler amplifier, is connected with the VCO module packaged in a modularized way, and is used for performing frequency doubling broadening on the local oscillator clock signal to generate a broadband frequency doubling signal of 740 MHz-1.55 GHz.
And the MEMS filter is connected with the output end of the frequency doubling amplifier and is used for filtering baseband signals in the broadband frequency doubling signals. In the example of the present invention, the reactance adjustment type MEMS tunable filter is adopted, the center frequency adjustment range of the tunable filter is 400 to 700MHz, and the tunable rate reaches 75%.
The utility model discloses a ware is divided to merit adopts one minute two merit to divide the ware, and it includes input and two way outputs, and its input is connected with the output of MEMS wave filter, and the first output of the same kind is connected with the first input of first mixer, and second way output is connected with the first input of second mixer.
The utility model discloses an in the embodiment, the merit divides the ware to adopt SQ-SMA12-K type 500-6000MHz broadband one minute two merits to divide the ware, and its input standing wave less than or equal to 1.65, output standing wave less than or equal to 1.35 adopt the SMA interface.
Referring to fig. 1, a second input terminal of the first mixer is connected to a first output interface of the radar waveform generating circuit, and the first output interface outputs a triangular pulse wave; the second input end of the second mixer is connected to the second output interface of the radar waveform generating circuit, and the first output interface outputs square wave pulse waves.
In a preferred embodiment, the first mixer and the second mixer are of the same type, in particular domestic RF microwave mixers, which achieve mixing from 500-5000MHz and LO power consumption of-10 dBm.
With reference to the schematic diagram of the radar waveform generating circuit shown in fig. 2, the radar waveform generating circuit includes a preceding stage waveform generator 10, an output end of the preceding stage waveform generator 10 is input to a second input end of the first mixer through a first path, the first path includes a cascaded timing control circuit 20 and an RS flip-flop 30, the timing control circuit 20 is configured to control level signals output to R and S input ends of the RS flip-flop 30, and a Q port of the RS flip-flop 30 outputs a triangular pulse wave as a first output interface of the radar waveform generating circuit.
The output end of the preceding-stage waveform generator 10 is input to the second input end of the second mixer through a second path, the second path comprises a resistor R8 and a protection diode D2 which are connected in parallel, the resistor R8 and the protection diode D2 are connected between the output end of the preceding-stage waveform generator 10 and the second input end of the second mixer after being connected in parallel, and the output end of the preceding-stage waveform generator 10 and the second input end of the second mixer are used as a second output interface of the radar waveform generating circuit to output square wave pulse waves.
Wherein, the protective diode D2 is a type 1N 4007 diode (1A, 50-1000V).
With reference to fig. 2, the preceding-stage waveform generator 10 includes a 555 timer U1, a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2, where the first resistor R1 is connected between a pin 6 and a pin 7 of the 555 timer U1, the second resistor R2 is connected between the pin 7 and a pin 4 of the 555 timer U1, and the pins 4 and 8 are connected in parallel with the second resistor R2 and then connected to the positive electrode of the power supply. The input voltage range of the power supply positive + Vcc is 3-15VDC.
One end of the first capacitor C1 is grounded, the other end of the first capacitor C1 is connected to the first resistor R1, and pins 2 and 6 of the 555 timer U1 are respectively connected between the first resistor R1 and the first capacitor C1.
One end of the second capacitor C2 is connected to a pin 5 of the 555 timer U1, and the other end of the second capacitor C2 is grounded.
And a pin 2 of the 555 timer U1 is used as an output end to output a square pulse waveform.
As shown in fig. 2, the timing control circuit 20 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a ninth resistor R9, a first logic device UA1, a second logic device UA2, a third logic device UA3, a third capacitor C3, an adjustable resistor VR, and a reverse diode D1.
A fourth resistor R4, a first logic device UA1, a reverse diode D1, a fifth resistor R5, a third logic device UA3 and a ninth resistor R9 are sequentially connected in series, and the output end of the third logic device UA3 is connected to the S input end of the RS trigger 30 through the ninth resistor R9; the fourth resistor R4 is connected to a pin 2 of a 555 timer U1 through the third resistor R3; the reverse diode D1 is connected in reverse between the first logic device UA1 and the fifth resistor R5.
An adjustable resistor VR is arranged in parallel with the reverse diode D1 between the first logic UA1 and the fifth resistor R5. The reverse diode D1 is a type 1N 4007 diode (1A, 50-1000V).
One end of the third capacitor C3 is connected between the reverse diode D1 and the fifth resistor R5, and the other end is grounded.
The sixth resistor R6, the second logic device UA2 and the seventh resistor R7 are sequentially connected in series, the sixth resistor R6 is connected to the pin 2 of the 555 timer U1 through the third resistor R3, and the output end of the second logic device UA2 is connected to the R input end of the RS trigger 30 through the seventh resistor R7.
The first logic device UA1, the second logic device UA2 and the third logic device UA3 all adopt a TI CD74HC4000 series logic controller, an enzimap or an ansh 74HC4000 series logic controller.
As an alternative embodiment, the resistances of the first resistor R1, the second resistor R2, the third resistor, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the ninth resistor R9 and the resistor R8 are 10K Ω.
The first capacitor C1, the second capacitor C2 and the third capacitor C3 are all electrolytic capacitors with capacitance value of 10 uf.
The resistance value of the adjustable resistor VR is adjusted within the range of 7.5-10K omega.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. A frequency synthesizer module for radar radiometry simulation, comprising:
the VCO module is used for generating local oscillator clock signals of 370-775 MHz;
the frequency doubling amplifier is connected with the VCO module in the modularized encapsulation and is used for performing frequency doubling and broadening on the local oscillator clock signal to generate a broadband frequency doubling signal of 740 MHz-1.55 GHz;
the MEMS filter is connected with the output end of the frequency doubling amplifier and is used for filtering baseband signals in the broadband frequency doubling signals;
the one-to-two power divider comprises an input end and two output ends, wherein the input end of the one-to-two power divider is connected with the output end of the MEMS filter, the first output end of the one-to-two power divider is connected with the first input end of the first frequency mixer, and the second output end of the one-to-two power divider is connected with the first input end of the second frequency mixer;
a second input end of the first frequency mixer is connected to a first output interface of the radar waveform generating circuit, and the first output interface outputs triangular pulse waves;
and a second input end of the second mixer is connected to a second output interface of the radar waveform generating circuit, and the first output interface outputs square wave pulse waves.
2. The frequency synthesizer module of claim 1, wherein the VCO module is a CRBV55BE series integrated VCO chip with a modular package, a tuning voltage range is 0-12V, and a tuning sensitivity is up to 0.5 MHz/V.
3. The frequency synthesizer module of claim 1 wherein the frequency multiplier amplifier is a frequency doubler.
4. The frequency synthesizer module of claim 1, wherein the one-to-two power divider is a 500-6000MHz wideband SMA type one-to-two power divider, wherein the input standing wave is 1.65 or less and the output standing wave is 1.35 or less.
5. The frequency synthesizer module of claim 1, wherein the MEMS filter is a reactance-adjustable MEMS tunable filter, the center frequency of the tunable filter is adjusted in a range of 400-700 MHz, and the tunable rate is up to 75%.
6. The frequency synthesizer module for radar radiation simulation according to any one of claims 1 to 5, wherein the radar waveform generating circuit comprises a preceding stage waveform generator (10), an output terminal of the preceding stage waveform generator (10) is input to a second input terminal of the first mixer through a first path, the first path comprises a cascaded timing control circuit (20) and RS flip-flop (30), the timing control circuit (20) is used for controlling level signals output to R and S input terminals of the RS flip-flop (30), a Q port of the RS flip-flop (30) is output as a first output interface of the radar waveform generating circuit, and a triangular pulse wave is output;
the output end of the preceding-stage waveform generator (10) is input into the second input end of the second mixer through a second path, the second path comprises a resistor (R8) and a protection diode (D2) which are connected in parallel, the resistor (R8) and the protection diode are connected between the output end of the preceding-stage waveform generator (10) and the second input end of the second mixer in parallel, the resistor (D2) and the protection diode are used as a second output interface of the radar waveform generating circuit, and square wave pulse waves are output.
7. The frequency synthesizer module for radar radiation simulation according to claim 6, wherein the preceding-stage waveform generator (10) comprises a 555 timer (U1), a first resistor (R1), a second resistor (R2), a first capacitor (C1) and a second capacitor (C2), wherein the first resistor (R1) is connected between a pin 6 and a pin 7 of the 555 timer (U1), the second resistor (R2) is connected between the pin 7 and a pin 4 of the 555 timer (U1), and the pins 4 and 8 are connected with the second resistor (R2) in parallel and then connected to a positive power supply;
one end of the first capacitor (C1) is grounded, the other end of the first capacitor (C1) is connected to the first resistor (R1), and pins 2 and 6 of the 555 timer (U1) are respectively connected between the first resistor (R1) and the first capacitor (C1);
pin 1 of the 555 timer (U1) is grounded;
one end of the second capacitor (C2) is connected to a pin 5 of the 555 timer (U1), and the other end of the second capacitor is grounded;
and a pin 2 of the 555 timer (U1) is used as an output end to output a square pulse waveform.
8. Frequency synthesis module for radar radiation simulation according to claim 7, characterized in that the timing control circuit (20) comprises a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7), a ninth resistor (R9), a first logic device (UA 1), a second logic device (UA 2), a third logic device (UA 3), a third capacitor (C3), an adjustable resistor (VR) and a reverse diode (D1), wherein:
the fourth resistor (R4), the first logic device (UA 1), the reverse diode (D1), the fifth resistor (R5), the third logic device (UA 3) and the ninth resistor (R9) are sequentially connected in series, and the output end of the third logic device (UA 3) is connected to the S input end of the RS trigger (30) through the ninth resistor (R9); the fourth resistor (R4) is connected to a pin 2 of the 555 timer (U1) through a third resistor (R3); the reverse connection diode (D1) is reversely connected between the first logic device (UA 1) and the fifth resistor (R5);
the adjustable resistor (VR) is connected in parallel with the reverse diode (D1) and is arranged between the first logic device (UA 1) and the fifth resistor (R5);
one end of the third capacitor (C3) is connected between the reverse diode (D1) and the fifth resistor (R5), and the other end of the third capacitor is grounded;
the sixth resistor (R6), the second logic device (UA 2) and the seventh resistor (R7) are sequentially connected in series, the sixth resistor (R6) is connected to a pin 2 of the 555 timer (U1) through the third resistor (R3), and an output end of the second logic device (UA 2) is connected to an R input end of the RS trigger (30) through the seventh resistor (R7).
9. Frequency synthesis module for radar radiation simulation according to claim 8, characterized in that the first logic device (UA 1), the second logic device (UA 2), the third logic device (UA 3) all employ TI's CD74HC4000 series logic controller, enzimap or ann's 74HC4000 series logic controller.
10. Frequency synthesis module for radar radiation simulation according to claim 8, characterized in that the first resistor (R1), the second resistor (R2), the third resistor, the fourth resistor (R4), the fifth resistor (R5), the sixth resistor (R6), the seventh resistor (R7), the ninth resistor (R9) and the resistor (R8) have a resistance of 10K Ω;
the first capacitor (C1), the second capacitor (C2) and the third capacitor (C3) are all electrolytic capacitors with capacitance values of 10 uf;
the resistance value adjusting range of the adjustable resistor (VR) is 7.5-10K omega;
the input voltage range of the power supply anode is 3-15VDC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221910261.3U CN217932041U (en) | 2022-07-20 | 2022-07-20 | Frequency synthesizer module for radar radiation simulation |
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| CN202221910261.3U CN217932041U (en) | 2022-07-20 | 2022-07-20 | Frequency synthesizer module for radar radiation simulation |
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| CN217932041U true CN217932041U (en) | 2022-11-29 |
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| CN202221910261.3U Active CN217932041U (en) | 2022-07-20 | 2022-07-20 | Frequency synthesizer module for radar radiation simulation |
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