CN210867606U

CN210867606U - Radio frequency driving source

Info

Publication number: CN210867606U
Application number: CN202020185004.2U
Authority: CN
Inventors: 唐兴林
Original assignee: Chengdu Lingjutong Technology Co ltd
Current assignee: Chengdu Lingjutong Technology Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-06-26
Anticipated expiration: 2030-02-19

Abstract

The utility model discloses a radio frequency driving source, which comprises a crystal oscillator, a microprocessor, a singlechip, a phase locking device, an adjustable attenuator, an amplifier, a switch, a filter, a coupler, an antenna and a wave detector; the phase lock, the adjustable attenuator, the amplifier, the switch, the filter, the coupler, the crystal oscillator, the detector and the single chip microcomputer are respectively connected with the microprocessor; the single chip microcomputer, the phase locking device, the adjustable attenuator, the amplifier, the filter, the coupler and the detector are sequentially connected; the antenna is connected with the coupler, and the switch is arranged between the amplifier and the filter and between the filter and the coupler. Through the utility model discloses can realize the radio frequency driving source who conveniently carries.

Description

Radio frequency driving source

Technical Field

The utility model belongs to the technical field of communication and specifically relates to a radio frequency driving source.

Background

A signal generator, also referred to as a signal source for short, may generate an original signal, which cannot be directly transmitted, and may also perform some processing, such as amplification, filtering, etc., on the signal, and the processed signal may be used to transmit information.

The signal source is generally bulky and inconvenient to carry, and original signals cannot be obtained in some special places, so that normal communication cannot be carried out, and the problem of information transmission is very great. Therefore, the demand for portable signal sources becomes extremely severe.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a radio frequency driving source, which comprises a crystal oscillator, a microprocessor, a singlechip, a phase locking device, an adjustable attenuator, an amplifier, a switch, a filter, a coupler, an antenna and a wave detector; the phase lock, the adjustable attenuator, the amplifier, the switch, the filter, the coupler, the crystal oscillator, the detector and the single chip microcomputer are respectively connected with the microprocessor; the single chip microcomputer, the phase locking device, the adjustable attenuator, the amplifier, the filter, the coupler and the detector are sequentially connected; the antenna is connected with the coupler, and the switch is arranged between the amplifier and the filter and between the filter and the coupler.

Preferably, the power supply module comprises a first linear voltage stabilizing chip, a second linear voltage stabilizing chip, a low-dropout linear voltage stabilizing chip and a DC/DC direct-current voltage stabilizing chip; the input end of the first voltage stabilizing chip is connected with an external power supply, and the output end of the first voltage stabilizing chip is connected with the amplifier; the low-voltage-difference linear voltage stabilizing chip and the DC/DC direct-current voltage stabilizing chip are respectively connected with the output end of the linear voltage stabilizing chip II, and the input end of the linear voltage stabilizing chip II is connected with an external power supply; the second linear voltage stabilizing chip is used for supplying power to the circuit; the low-dropout linear voltage stabilizing chip is used for providing working voltage for the microprocessor; the DC/DC voltage stabilization chip micro amplifier provides starting voltage.

Preferably, the amplifier adopts a three-stage amplifier; the three-stage amplifier comprises an HBT power amplifier and two HEMHzT power amplifiers, signals are subjected to first-stage amplification through the HBT power amplifier SBB5089Z, and then are subjected to power amplification processing through two identical HEMHzT power amplifiers NPA1008 in sequence to obtain amplified signals.

Preferably, the microprocessor adopts an ARM microprocessor, and the model adopted is STM32F103RET 6.

Preferably, the model of the single chip microcomputer is C8051F 330.

Preferably, the HBT power amplifier is of the type SBB5089Z, and the two hemhz t power amplifiers are of the type NPA 1008.

Preferably, the adjustable attenuator is an adjustable fixed attenuator and is of the type FSA 2013.

Preferably, linear steady voltage chip one for linear steady voltage chip, the model of adoption be LT1084, linear steady voltage chip two for linear steady voltage chip, the model of adoption be TA78M05F, the linear steady voltage chip of low dropout adopt the model be ME6209A33M3G, DC/DC direct current steady voltage chip adopt the model be LT1931IS 5.

The utility model has the advantages that: the radio frequency driving source provided by the utility model can be used as a signal source to generate an original signal; the small signal can be amplified and then output as a power amplifier; and it has small volume and is more convenient to carry.

Drawings

FIG. 1is a schematic diagram of a radio frequency drive source;

fig. 2 is a schematic diagram of a power module.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1, the utility model provides a radio frequency driving source divide into two modules of high frequency channel and low frequency channel, can export the fixed dot frequency signal of high stability and high accuracy.

The four frequency points of the low frequency band are respectively 60MHz, 81MHz, 99MHz and 108 MHz; the four frequency points of the high frequency band are 270MHz, 450MHz, 800MHz and 1750MHz respectively. The power of the radio frequency signal output by the driver can be externally modulated. The driver is also provided with a built-in power amplifier, and small signals can be amplified. The amplified signal can be directly output through an antenna port to transmit information.

The design of the high-frequency band module and the low-frequency band module is completed in two layers in one cavity, wherein one layer is the low-frequency band, and the other layer is the high-frequency band. The frequency range of the selected power tube covers all frequency points, and the design of a high frequency band and a low frequency band can be completed by using the same power tube. The two modules are identical in structure, identical in hardware control and principle, and different in frequency point of signals generated by the source. The low frequency band source generates original signals of 60MHz, 81MHz, 99MHz and 108 MHz; the high band produces the original signals at 270MHz, 450MHz, 800MHz, 1750 MHz.

As shown in fig. 1, the high-frequency signal portion mainly comprises a crystal oscillator, a single chip, a phase-locked chip, an adjustable attenuator, an amplifier, a switch, a filter, a coupler and a detector.

The crystal oscillator provides a basic reference source signal, the singlechip C8051F330 performs frequency synthesis matching operation, then the signals enter a phase-locked chip HMC830LP6G together, and fixed frequency points are output by utilizing the phase-locked loop technology of the chip, so that the purpose of generating signals by the chip is achieved.

Aiming at the frequency and the power of a small signal, a three-stage amplification mode is finally adopted to amplify the signal entry. The selected power tubes are respectively one SBB5089Z and two NPAs 1008, and the total amplification gain is larger than 50 dB. SBB5089Z is a broadband HBT type power amplifier with maximum frequency up to 4GHz and small signal gain up to 20 dB. The NPA1008 is a broadband HEMHzT power amplifier, the frequency of the power amplifier can reach 2.7GHz, the small signal gain is 12dB, and the power amplifier is convenient to use. The requirement of gain can be met by three-stage amplification.

In order to increase the adjustability of the output power, a controllable attenuation chip is added, the type is FSA2013, the controllable attenuation chip is an adjustable fixed attenuator, the required attenuation can be selected by controlling the power supply of different pins, the attenuation is divided into seven attenuation levels of 0.25, 0.5, 1, 2, 4, 8 and 16, and the attenuation of all values can be met through different combinations.

The signals at each frequency point reach the desired power after being amplified, but the spurious signals around the main signal are correspondingly amplified while the main signal is amplified, so that the signal is filtered. And filtering signals with different frequencies by using filters with different frequency bands, switching the corresponding frequency bands by using a switch, and obtaining final signals after filtering.

Before the signals are output through the antenna port, the coupler is used for coupling the signals to obtain a new signal, and the new signal is supplied to the detector for detection, so that the power of the output signals can be detected conveniently.

All operations are completed by the ARM microprocessor STM32F103RET 6. STM32F103RET6 is a 32-bit MCU of ARM based high density performance, has 256 to 512KB Flzsh, USB, CAN function, has 11 timer functions, 3 ADC functions and 13 communication interface. And serial port communication and AD/DA acquisition and output are used. The single chip microcomputer is connected with a controllable upper computer through a communication chip RS 485. The control instruction is directly sent to the single chip microcomputer through the upper computer, and the single chip microcomputer controls corresponding parts to operate according to different instructions.

As shown in fig. 2, the power supply part mainly converts each voltage, and provides different voltages for different chips to ensure the normal operation of each chip.

The external power supply of the whole module is +28V, because the power tube of the core device is +24V, one path of voltage is converted into +24V by using LT1084 to be directly supplied to the power tube, the LT1084 is a linear voltage-stabilizing chip, the output current can reach 5A, and the use of the power tube is completely met; part of chips are supplied with power by +5V, such as a temperature sensor, an adjustable attenuator and the like, so that a path of voltage of +5V is required to be generated, a TA78M05F linear voltage-stabilizing chip is used, the maximum voltage borne by the TA78M05F reaches +35V, the working current is 0.5A, and stable voltage and current can be provided in a circuit and cannot be burnt out; the single chip microcomputer STM32F103RET6 needs +3.3V power supply, and needs to independently generate a path of voltage. ME6209A33M3G is a low dropout linear regulator chip, the allowed maximum input voltage is +16V, when the output voltage is +3.3V, the maximum current is 250mA, which can ensure the normal use of the singlechip; finally, because the used power tube NPA1008 is a negative pressure tube, and a negative pressure is also needed as a starting voltage to ensure the normal operation of the power tube, a path of negative pressure also needs to be generated. LT1931IS5 IS a DC/DC direct current voltage stabilizing chip, and its maximum input voltage position IS +16V, and output voltage IS-5V, and the current at this moment has 350mA, can use bleeder circuit after outputting, adjusts our required power amplifier tube and opens the voltage, makes the power amplifier tube work in the optimum state.

The existing radio frequency driving source is divided into two layers, a high frequency band and a low frequency band are separated, and each part is an independent module, so that the two parts cannot be interfered with each other.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A radio frequency driving source is characterized by comprising a crystal oscillator, a microprocessor, a single chip microcomputer, a phase locker, an adjustable attenuator, an amplifier, a switch, a filter, a coupler, an antenna and a detector; the phase lock, the adjustable attenuator, the amplifier, the switch, the filter, the coupler, the crystal oscillator, the detector and the single chip microcomputer are respectively connected with the microprocessor; the single chip microcomputer, the phase locking device, the adjustable attenuator, the amplifier, the filter, the coupler and the detector are sequentially connected; the antenna is connected with the coupler, and the switch is arranged between the amplifier and the filter and between the filter and the coupler.

2. The radio frequency driving source according to claim 1, further comprising a power module, wherein the power module comprises a first linear regulator chip, a second linear regulator chip, a low dropout linear regulator chip, and a DC/DC regulator chip; the input end of the first voltage stabilizing chip is connected with an external power supply, and the output end of the first voltage stabilizing chip is connected with the amplifier; the low-voltage-difference linear voltage stabilizing chip and the DC/DC direct-current voltage stabilizing chip are respectively connected with the output end of the linear voltage stabilizing chip II, and the input end of the linear voltage stabilizing chip II is connected with an external power supply; the second linear voltage stabilizing chip is used for supplying power to the circuit; the low-dropout linear voltage stabilizing chip is used for providing working voltage for the microprocessor; the DC/DC voltage stabilization chip micro amplifier provides starting voltage.

3. A radio frequency drive source as claimed in claim 1, wherein the amplifier is a three stage amplifier; the three-stage amplifier comprises an HBT power amplifier and two HEMHzT power amplifiers, signals are subjected to first-stage amplification through the HBT power amplifier SBB5089Z, and then are subjected to power amplification processing through two identical HEMHzT power amplifiers NPA1008 in sequence to obtain amplified signals.

4. A radio frequency drive source as claimed in claim 1, wherein the microprocessor is an ARM microprocessor of the type STM32F103RET 6.

5. The rf driving source as claimed in claim 1, wherein the single-chip microcomputer is of a type C8051F 330.

6. A radio frequency drive source as claimed in claim 3, wherein the HBT power amplifier is of the type SBB5089Z and the two hemhz t power amplifiers are of the type NPA 1008.

7. A radio frequency drive source as claimed in claim 1, wherein the adjustable attenuator is an adjustable fixed attenuator of the type FSA 2013.

8. The rf driving source according to claim 2, wherein the first linear regulator chip IS a linear regulator chip of type LT1084, the second linear regulator chip IS a linear regulator chip of type TA78M05F, the low-dropout linear regulator chip IS of type ME6209a33M3G, and the DC/DC regulator chip IS of type LT1931IS 5.