CN111064480B - Broadband signal generating device - Google Patents
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- CN111064480B CN111064480B CN201911321177.0A CN201911321177A CN111064480B CN 111064480 B CN111064480 B CN 111064480B CN 201911321177 A CN201911321177 A CN 201911321177A CN 111064480 B CN111064480 B CN 111064480B
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- 239000013078 crystal Substances 0.000 claims description 4
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a broadband signal generating device, which comprises a phase-locked loop module, an adjustable amplifier module, a power detection module and a single chip microcomputer, wherein the power supply module supplies power to the phase-locked loop module, the adjustable amplifier module, the power detection module and the single chip microcomputer; the output end of the single chip microcomputer is connected with the input end of the phase-locked loop module and the input end of the adjustable amplifier module, the output end of the phase-locked loop module is connected with the input end of the adjustable amplifier module, the output end of the adjustable amplifier module is connected with the input end of the power divider I, one output end of the power divider I is connected with the input end of the power detection module, the other output end of the power divider I serves as a signal source output end, and the output end of the power detection module is connected with the input end of the single chip microcomputer. The radio frequency signal generation module generates a radio frequency signal with a frequency range of 25 MHz-5 GHz, a high-power signal is obtained after the radio frequency signal passes through the amplifier module, the power detection module detects the signal amplitude of the output end, power stability adjustment can be carried out, and the amplification factor of the amplifier is changed in real time to obtain a stable output power signal.
Description
Technical Field
The invention relates to the field of communication, in particular to a power-adjustable broadband signal generating device which is applied to experiments in the field of communication and can be used as a signal energy output device in other fields.
Background
With the continuous development of communication technology, the requirements for signal sources are higher and higher. The signal source plays a great role in the inspection and experiment of communication equipment, except the detection and experiment in the communication field. The signal source can also be applied to the biological field of researching the influence of electromagnetic radiation on human bodies. Recently, wireless power transmission, a signal source, has been very useful in this field. In order to realize wider frequency coverage, the research on adjustable power signal sources of 25 MHz-5 GHz has great significance.
Therefore, a plurality of types of signal sources are designed in the prior art, but the problems that the stepping value is large, the noise is large, the frequency range does not contain low frequency, the self-adaptive adjustment cannot be carried out and the like exist, and most of the existing signal sources can provide the frequency range of 30 MHz-3 GHz. In summary, there are still many areas for improvement of the existing signal source.
Disclosure of Invention
Aiming at the problems, the invention develops a broadband signal source as a broadband signal generating device with adjustable power.
The invention is realized by adopting the following technical scheme:
a broadband signal generating device comprises a phase-locked loop module, an adjustable amplifier module, a power detection module and a single chip microcomputer, and is powered by a power supply module; the output end of the single chip microcomputer is connected with the input end of the phase-locked loop module and the input end of the adjustable amplifier module, the output end of the phase-locked loop module is connected with the input end of the adjustable amplifier module, the output end of the adjustable amplifier module is connected with the input end of the power divider I, one output end of the power divider I is connected with the input end of the power detection module, the other output end of the power divider I serves as a signal source output end, and the output end of the power detection module is connected with the input end of the single chip microcomputer.
Preferably, the phase-locked loop module comprises a frequency divider, a loop filter, a local oscillator, a phase discriminator, a charge pump, a voltage-controlled oscillator, and a power divider II, one input end of the frequency divider is used as the input end of the phase-locked loop module and is connected with the output end of the singlechip, the output end of the frequency divider is connected with the input end of the loop filter, the output end of the loop filter is connected with one input end of the phase discriminator, the other input end of the phase discriminator is connected with the output end of the local oscillator crystal oscillator, the output end of the phase discriminator is connected with the input end of the charge pump, the output end of the charge pump is connected with the input end of the voltage-controlled oscillator, the output end of the voltage-controlled oscillator is connected with one input end of the power divider II, and the output end of the power divider II is connected with the other input end of the frequency divider, and the other output end of the power divider II is used as the output end of the phase-locked loop module and is connected with the input end of the adjustable amplifier module.
Preferably, the power detection module comprises a 0-2 GHz coupling line, a 2-4 GHz coupling line, a 4-5 GHz coupling line, a radio frequency switch and a detector, wherein the 0-2 GHz coupling line, the 2-4 GHz coupling line and the 4-5 GHz coupling line are respectively coupled with one output end of the power divider I, the 0-2 GHz coupling line, the 2-4 GHz coupling line and the 4-5 GHz coupling line are connected with the radio frequency switch, the radio frequency switch is controlled by the single chip microcomputer, the radio frequency switch is connected with the detector, and the detector is connected with the single chip microcomputer.
When the phase-locked loop module works, the phase-locked loop module serves as a radio frequency signal generation module to generate a radio frequency signal with a frequency range of 25 MHz-5 GHz, a high-power signal is obtained after the radio frequency signal passes through the amplifier module, the power detection module detects the signal amplitude of the output end, the single chip microcomputer can perform power stability adjustment, and the amplification factor of the amplifier is changed in real time to obtain a stable output power signal.
The invention has reasonable design and good practical application value.
Drawings
Fig. 1 shows a block diagram of the present invention.
Fig. 2 shows a block diagram of a phase-locked loop module of the present invention.
Fig. 3 shows a block diagram of a power detection module of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A power-adjustable broadband signal generating device is shown in figure 1 and comprises a phase-locked loop module (a signal output module carrying an HMC833LP6GE chip), an adjustable amplifier module, a power detection module and a single chip microcomputer, wherein all the modules are controlled by the single chip microcomputer and powered by a power supply module; the output end of the single chip microcomputer is connected with the input end of the phase-locked loop module and the input end of the adjustable amplifier module, the output end of the phase-locked loop module is connected with the input end of the adjustable amplifier module, the output end of the adjustable amplifier module is connected with the input end of the power divider I, one output end of the power divider I is connected with the input end of the power detection module, the other output end of the power divider I serves as a signal source output end, and the output end of the power detection module is connected with the input end of the single chip microcomputer.
As shown in fig. 2, the phase-locked loop module includes a frequency divider, a loop filter, a local oscillator, and a phase detector, the charge pump, the voltage controlled oscillator, merit divides ware II, an input of frequency divider is connected with the output of singlechip as the input of phase-locked loop module, the output of frequency divider is connected with loop filter's input, loop filter's output is connected with an input of phase discriminator, another input of phase discriminator is connected with the output of local oscillator crystal oscillator, the output of phase discriminator is connected with the input of charge pump, the output of charge pump is connected with voltage controlled oscillator's input, voltage controlled oscillator's output is connected with an input of merit branch ware II, the output of merit divides the output of ware II to be connected with another input of frequency divider, another output of merit divides the output of ware II as the output of phase-locked loop module to be connected with the input of adjustable amplifier module.
During specific implementation, the phase-locked loop module is built by utilizing an HMC833LP6GE chip, the chip can provide frequency signals of 25 MHz-5000 MHz, the phase-locked loop module is provided with a decimal divider and integrates a voltage-controlled oscillator with low phase noise. The device has an accurate frequency mode and a built-in digital self-testing function. The integrated phase-locked loop has the characteristics of low noise and better development time saving. By using the radio frequency signal with low step value and high precision provided by the chip HMC833LP6GE, the problems of small frequency coverage, large step value and large noise are solved. The phase-locked loop also integrates vco to obtain a loop filter through simulation software such as ads, simplifies the development process and improves the anti-interference performance.
The amplifier module (controllable gain amplifier) uses the chip HMC625BLP5E to achieve its gain control: 13.5dB to +18dB, the step size is 0.5dB, and the high output IP 3: +32dBm, gain step error: 0.25dB (typical value), 32 pin 5 x 5mm SMT package. The high-gain amplification chip can stabilize the power of the output signal, and the power signal can be applied to the research of wireless power transmission.
In order to achieve the purpose of stabilizing the output of the signal source and solve the problem of unstable power output of the signal source, the power detection module is added at the output end to enable the output end to stably output a preset frequency value, and the detection module can ensure the accuracy of an experiment and improve the reliability of the whole equipment.
As shown in fig. 3, the power detection module includes a 0-2 GHz coupling line, a 2-4 GHz coupling line, a 4-5 GHz coupling line, a radio frequency switch, and a detector, the 0-2 GHz coupling line, the 2-4 GHz coupling line, and the 4-5 GHz coupling line are respectively coupled with an output end of the power divider i, the 0-2 GHz coupling line, the 2-4 GHz coupling line, and the 4-5 GHz coupling line are connected with the radio frequency switch, the radio frequency switch is controlled by a single chip microcomputer, the radio frequency switch is connected with the detector, and the detector is connected with the single chip microcomputer. All the last signals of the power detection part are received by the singlechip.
The power detection module uses a coupling line detection mode, 25 MHz-5 GHz is a very wide frequency range, so that the coupling degree of the coupling line is ensured to be more flat for better power detection, and the coupled energy is ensured to be more accurate. Therefore, signals of 0-2 GHz, 2 GHz-4 GHz and 4GHz are respectively coupled by adopting a three-section coupling line mode, a radio frequency switch is used for controlling the conduction of which coupling line, and a single chip microcomputer is used for controlling the radio frequency switch. The coupled signals are sent to a chip HMC662, which is a power detection chip (detector), the working range of the chip is 1 GHz-8 GHz, the analog voltage of 0.5V-2V can be output corresponding to the signals of-60 dBm-10 dBm, the analog signals are sent to an analog-to-digital conversion chip and then are converted into digital signals, and the digital signals are sent to a single chip microcomputer, and the single chip microcomputer can analyze the power value.
The singlechip module adopts stm32 series singlechip, and the singlechip can input required frequency and required power by an external keyboard and a screen. The single chip microcomputer needs to take the data into account, the phase-locked loop module is controlled to output the desired frequency, the controllable gain amplifier is controlled to obtain the desired power, the power detection module is used for obtaining the output power, the output power is compared with the set power, and finally the gain of the amplifier is adjusted to be stably output.
In order to ensure better signal output, the system also needs to have good impedance matching.
The device utilizes a single chip microcomputer to control a phase-locked loop chip HMC833LP6GE to generate 25 MHz-5000 MHz, and forms a signal source by matching with a broadband amplifier made by an adjustable gain amplifier chip HMC625BLP5E and a power detection module and the like. The signal source has good broadband characteristics, and has a power detection function, and the stable output power can be automatically adjusted according to the feedback condition. The signal source has small stray noise and small step value, and can be applied to experiments such as communication systems, electromagnetic irradiation devices, wireless power transmission and the like.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall all fall within the protection scope of the claims of the present invention.
Claims (1)
1. A broadband signal generating device is characterized in that: the power supply comprises a phase-locked loop module, an adjustable amplifier module, a power detection module and a singlechip, and is powered by a power supply module; the output end of the single chip microcomputer is connected with the input end of a phase-locked loop module and the input end of an adjustable amplifier module, the output end of the phase-locked loop module is connected with the input end of the adjustable amplifier module, the output end of the adjustable amplifier module is connected with the input end of a power divider I, one output end of the power divider I is connected with the input end of a power detection module, the other output end of the power divider I serves as a signal source output end, and the output end of the power detection module is connected with the input end of the single chip microcomputer;
the phase-locked loop module comprises a frequency divider, a loop filter, a local oscillator crystal oscillator, a phase discriminator, a charge pump, a voltage-controlled oscillator and a power divider II, one input end of the frequency divider is used as the input end of the phase-locked loop module and is connected with the output end of the singlechip, the output end of the frequency divider is connected with the input end of the loop filter, the output end of the loop filter is connected with one input end of the phase discriminator, the other input end of the phase discriminator is connected with the output end of the local oscillator crystal oscillator, the output end of the phase discriminator is connected with the input end of the charge pump, the output end of the charge pump is connected with the input end of the voltage-controlled oscillator, the output end of the voltage-controlled oscillator is connected with one input end of the power divider II, the output end of the power divider II is connected with the other input end of the frequency divider, and the other output end of the power divider II is used as the output end of the phase-locked loop module and is connected with the input end of the adjustable amplifier module;
the power detection module comprises a 0-2 GHz coupling line, a 2-4 GHz coupling line, a 4-5 GHz coupling line, a radio frequency switch and a detector, wherein the 0-2 GHz coupling line, the 2-4 GHz coupling line and the 4-5 GHz coupling line are respectively coupled with one output end of the power divider I, the 0-2 GHz coupling line, the 2-4 GHz coupling line and the 4-5 GHz coupling line are connected with the radio frequency switch, the radio frequency switch is controlled by a single chip microcomputer, the radio frequency switch is connected with the detector, and the detector is connected with the single chip microcomputer.
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| CN112653459A (en) * | 2020-12-28 | 2021-04-13 | 成都美数科技有限公司 | Radio frequency signal source capable of being calibrated in real time |
| CN115189782B (en) * | 2021-06-10 | 2024-01-26 | 成都华芯天微科技有限公司 | Plane near field test equipment |
| CN114422043B (en) * | 2022-03-28 | 2022-07-08 | 成都嘉纳海威科技有限责任公司 | Reliability test device and method |
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| CN201063637Y (en) * | 2007-03-15 | 2008-05-21 | 北京汉铭通信有限公司 | Multifunctional signal generator |
| CN103187934A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Protection method for radio frequency power amplifier and RRU (remote RF (radio frequency) unit) |
| CN105978563A (en) * | 2016-06-16 | 2016-09-28 | 中国科学院武汉物理与数学研究所 | Digital phase-locked modulation frequency multiplier for rubidium atomic frequency standard |
| CN208063177U (en) * | 2018-07-16 | 2018-11-06 | 成都仁健微波技术有限公司 | A kind of micromation broadband frequency source |
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