CN211579970U - Unmanned aerial vehicle frequency division transceiver - Google Patents
Unmanned aerial vehicle frequency division transceiver Download PDFInfo
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- CN211579970U CN211579970U CN202020565188.5U CN202020565188U CN211579970U CN 211579970 U CN211579970 U CN 211579970U CN 202020565188 U CN202020565188 U CN 202020565188U CN 211579970 U CN211579970 U CN 211579970U
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Abstract
The utility model discloses an unmanned aerial vehicle frequency division transceiver belongs to unmanned air vehicle technical field. The device comprises a duplexer, a receiving unit, a transmitting unit and a frequency synthesizing unit; the duplexer is provided with two different frequency channels which are respectively connected with the receiving unit and the transmitting unit; the frequency synthesizing unit is used for providing a receiving local oscillator for the receiving unit and providing a transmitting local oscillator for the transmitting unit, and the frequency of the receiving local oscillator is different from that of the transmitting local oscillator. The device simple structure has transmission efficiency height, characteristics that the interference killing feature is strong, easily realizes the miniaturization, is suitable for to use on the unmanned aerial vehicle that requires the load to be higher.
Description
Technical Field
The utility model relates to an unmanned air vehicle technique field especially indicates an unmanned aerial vehicle frequency division transceiver, can regard as the data link transceiver of unmanned aerial vehicle remote control, telemetering measurement.
Background
A drone is an unmanned aircraft that is operated with a radio remote control device and self-contained program control, or is operated autonomously, either completely or intermittently, by an onboard computer. At present, unmanned aerial vehicles have wide application in fields such as aerial photography, agriculture, plant protection, self-shooting, express transportation, disaster relief, wild animal observation, infectious disease monitoring, surveying and mapping, news reporting, electric power inspection, disaster relief, movie and television shooting, romantic manufacturing and the like, and the application of the unmanned aerial vehicles is greatly expanded.
The frequency division transceiver is a wireless signal transceiver of an unmanned aerial vehicle system, is used for receiving a wireless signal in space, filtering, frequency converting and amplifying, providing an intermediate frequency signal for a receiving terminal, and transmitting the intermediate frequency signal modulated with information to the space after frequency converting, filtering and amplifying, thereby realizing the remote control and remote measurement functions of the unmanned aerial vehicle.
The frequency division transceiver in FDD mode has two independent channels, one for uplink data transmission and the other for downlink data transmission, and can simultaneously perform data transmission. In order to ensure normal communication between a receiving channel and a transmitting channel, the FDD two channels need to adopt different frequency points, and distinguish an uplink channel from a downlink channel by means of frequency, and can continuously transmit in terms of unidirectional communication time. The FDD uses different frequencies for sending data and receiving data, and the data sending and receiving are not limited by time, so the data sending and receiving rates are the same, the method is more suitable for being applied to a symmetrical data scheme, and the data can be sent between the devices all the time, thereby effectively improving the transmission efficiency.
However, the existing frequency division transceiver has a complex structure and is not easy to be miniaturized.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a frequency division transceiver of unmanned aerial vehicle, it has simple structure's characteristics, and transmission efficiency is high, the interference killing feature is strong, easily realizes the miniaturization of equipment.
In order to solve the above problem, the utility model discloses the technical scheme who takes does:
an unmanned aerial vehicle frequency division transceiver comprises a duplexer, a receiving unit, a transmitting unit and a frequency synthesizing unit; the duplexer is provided with two different frequency channels which are respectively connected with the receiving unit and the transmitting unit; the frequency synthesizing unit is used for providing a receiving local oscillator for the receiving unit and providing a transmitting local oscillator for the transmitting unit, and the frequency of the receiving local oscillator is different from that of the transmitting local oscillator;
when receiving signals, the duplexer transmits intermediate-frequency signals received by the antenna through the combiner port, filters the signals in a channel with the same frequency as the received signals, and transmits the signals to the receiving unit, and the receiving unit processes the signals and outputs the signals to the outside; when the signal is sent, the transmitting unit receives an intermediate frequency signal to be transmitted, which is input from the outside, processes the signal and transmits the processed signal to the duplexer, and the duplexer carries out filtering processing on the signal in a channel with the same frequency as the transmitting signal and then outputs the signal to the antenna through the combiner port for transmitting.
Further, the receiving unit comprises a low noise amplifier, an image frequency radio frequency filter, a first analog attenuator, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a second analog attenuator and a second intermediate frequency amplifier which are connected in sequence, and further comprises a DA-AD converter for transmitting signals between the external control device and the first and second analog attenuators;
in the receiving unit, the low noise amplifier is used for level amplifying the intermediate frequency signal received by the antenna sent by the duplexer, the image frequency radio frequency filter is used for image frequency suppression of the signal sent by the low noise amplifier, the first analog attenuator is used for power adjustment of the signal sent by the image frequency radio frequency filter under the action of the external control signal sent by the DA-AD converter, the first mixer is used for receiving the receiving local oscillator provided by the frequency synthesizer and mixing the signal sent by the first analog attenuator, the first intermediate frequency filter is used for filtering the signal sent by the first mixer, the first intermediate frequency amplifier is used for power amplification of the signal sent by the first intermediate frequency filter, the second analog attenuator is used for power amplification of the external control signal sent by the DA-AD converter, the second intermediate frequency amplifier is used for carrying out power amplification and AGC control on the signal sent by the second analog attenuator and outputting the processed intermediate frequency signal to the outside; in addition, the DA-AD converter also carries out AD conversion on the voltages output by the first and second analog attenuators and feeds the voltages back to the external control equipment.
Further, the transmitting unit includes a second intermediate frequency filter, a third intermediate frequency amplifier, a second mixer, a radio frequency filter, an adjustable gain amplifier and a power amplifier, which are connected in sequence;
in the transmitting unit, the second intermediate frequency filter is configured to filter an externally input intermediate frequency signal to be transmitted, the third intermediate frequency amplifier is configured to amplify a signal sent by the second intermediate frequency filter, the second mixer is configured to receive a transmit local oscillator provided by the frequency synthesizer unit and mix a signal sent by the third intermediate frequency amplifier, the radio frequency filter is configured to filter a signal sent by the second mixer, the adjustable gain amplifier is configured to gain-amplify a signal sent by the radio frequency filter according to a set power level, and the power amplifier is configured to power-amplify a signal sent by the adjustable gain amplifier and send the processed signal to the duplexer.
Further, the frequency synthesizer unit comprises a receiving frequency synthesizer chip, a transmitting frequency synthesizer chip and a reference crystal oscillator;
the receiving frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a receiving local oscillator and output the frequency signal to the receiving unit; the transmitting frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a transmitting local oscillator and output the frequency signal to the transmitting unit.
Further, the duplexer is a dielectric duplexer.
Compared with the prior art, the utility model the advantage do:
(1) the utility model discloses a FDD frequency division duplex mode has the characteristics that transmission efficiency is high, the interference killing feature is strong.
(2) The utility model discloses simple structure easily realizes the miniaturization of equipment.
(3) Further, the utility model discloses a duplexer can adopt the medium duplexer, and this kind of duplexer has characteristics small, light in weight, can place the transceiver in conveniently inside, is favorable to realizing the miniaturization of equipment.
(4) The utility model discloses a frequency of operation is adjustable, can carry out the frequency switch when communication receives the interference, avoids communication to break.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic block diagram of the receiving unit of fig. 1.
Fig. 3 is a schematic block diagram of the transmitting unit of fig. 1.
Fig. 4 is a functional block diagram of the duplexer of fig. 1.
Fig. 5 is a schematic block diagram of the frequency synthesizer unit of fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, an unmanned aerial vehicle frequency division transceiver includes a duplexer, a receiving unit, a transmitting unit, and a frequency synthesizing unit; the duplexer is provided with two different frequency channels which are respectively connected with the receiving unit and the transmitting unit; the frequency synthesizing unit is used for providing a receiving local oscillator for the receiving unit and providing a transmitting local oscillator for the transmitting unit, and the frequency of the receiving local oscillator is different from that of the transmitting local oscillator;
when receiving signals, the duplexer transmits intermediate-frequency signals received by the antenna through the combiner port, filters the signals in a channel with the same frequency as the received signals, and transmits the signals to the receiving unit, and the receiving unit processes the signals and outputs the signals to the outside; when the signal is sent, the transmitting unit receives an intermediate frequency signal to be transmitted, which is input from the outside, processes the signal and transmits the processed signal to the duplexer, and the duplexer carries out filtering processing on the signal in a channel with the same frequency as the transmitting signal and then outputs the signal to the antenna through the combiner port for transmitting.
In the transceiver, the duplexer, the receiving unit, the transmitting unit and the frequency synthesizing unit can all adopt existing modules in the prior art.
Specifically, as shown in fig. 2, the receiving unit includes a low noise amplifier, an image frequency radio frequency filter, a first analog attenuator, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a second analog attenuator, and a second intermediate frequency amplifier, which are connected in sequence, and further includes a DA-AD converter for transmitting signals between the external control device and the first and second analog attenuators;
in the receiving unit, the low noise amplifier is used for level amplifying the intermediate frequency signal received by the antenna sent by the duplexer, the image frequency radio frequency filter is used for image frequency suppression of the signal sent by the low noise amplifier, the first analog attenuator is used for power adjustment of the signal sent by the image frequency radio frequency filter under the action of the external control signal sent by the DA-AD converter, the first mixer is used for receiving the receiving local oscillator provided by the frequency synthesizer and mixing the signal sent by the first analog attenuator, the first intermediate frequency filter is used for filtering the signal sent by the first mixer, the first intermediate frequency amplifier is used for power amplification of the signal sent by the first intermediate frequency filter, the second analog attenuator is used for power amplification of the external control signal sent by the DA-AD converter, the second intermediate frequency amplifier is used for carrying out power amplification and AGC control on the signal sent by the second analog attenuator and outputting the processed intermediate frequency signal to the outside; in addition, the DA-AD converter also carries out AD conversion on the voltages output by the first and second analog attenuators and feeds the voltages back to the external control equipment.
As shown in fig. 3, the transmitting unit includes a second intermediate frequency filter, a third intermediate frequency amplifier, a second mixer, a radio frequency filter, an adjustable gain amplifier, and a power amplifier, which are connected in sequence;
in the transmitting unit, the second intermediate frequency filter is configured to filter an externally input intermediate frequency signal to be transmitted, the third intermediate frequency amplifier is configured to amplify a signal sent by the second intermediate frequency filter, the second mixer is configured to receive a transmit local oscillator provided by the frequency synthesizer unit and mix a signal sent by the third intermediate frequency amplifier, the radio frequency filter is configured to filter a signal sent by the second mixer, the adjustable gain amplifier is configured to gain-amplify a signal sent by the radio frequency filter according to a set power level, and the power amplifier is configured to power-amplify a signal sent by the adjustable gain amplifier and send the processed signal to the duplexer.
As shown in fig. 5, the frequency synthesizer unit includes a receiving frequency synthesizer chip, a transmitting frequency synthesizer chip and a reference crystal oscillator;
the receiving frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a receiving local oscillator and output the frequency signal to the receiving unit; the transmitting frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a transmitting local oscillator and output the frequency signal to the transmitting unit.
The receiving unit, the transmitting unit and the frequency synthesizer unit can be manufactured by adopting conventional devices sold in the market. A person skilled in the art will undoubtedly realize these units in conjunction with the above description and the corresponding figures.
In addition, in order to further reduce the size of the transceiver, the duplexer can adopt a dielectric duplexer, i.e. a duplexer adopting a dielectric ceramic material, and the volume of the duplexer is greatly reduced and the weight of the duplexer is lighter than that of an aluminum material cavity structure duplexer. Fig. 4 is a schematic block diagram of a duplexer.
The utility model discloses a theory of operation does:
when receiving signals, receiving radio frequency signals from the output port of the radio frequency filter of the combiner unit of the duplexer; carrying out received signal level amplification by a low noise amplifier, and then carrying out image frequency suppression by an image frequency radio frequency filter; after power adjustment is carried out through a first analog attenuator, the mixed power enters a first mixer for mixing; the intermediate frequency signal output by the first mixer is filtered by a first intermediate frequency filter; after power amplification is carried out by the first intermediate frequency amplifier and power adjustment is carried out by the second analog attenuator, the intermediate frequency signal enters the second intermediate frequency amplifier for power amplification and AGC control, and then the intermediate frequency signal is output to external equipment, and the first analog attenuator and the second analog attenuator jointly realize a large AGC dynamic range of 60 dB; the A/D converter performs A/D conversion on the AGC voltage and outputs the AGC voltage to the control unit for digital quantization processing.
When the signal is transmitted, the transmitting unit receives a transmitting intermediate frequency signal from external equipment, and the filtering processing is carried out by a second intermediate frequency filter; amplifying by a third intermediate frequency amplifier; then the second mixer carries out frequency mixing; filtering the radio frequency signal output by the mixing by a radio frequency filter; the power is amplified by the first adjustable gain amplifier according to the power grade set by the control unit, so that the power can be adjusted in three grades; and then, the power amplifier is used for carrying out power amplification, and the radio-frequency signals meeting the power requirements are output to a transmitting input port of the combiner unit of the duplexer.
Meanwhile, the frequency synthesizing unit is used for providing local oscillation signals for the receiving unit and the transmitting unit and realizing channel switching through serial port control. The channel switching function is an existing function of a commercially available frequency synthesizer chip, and how to implement channel switching is also common knowledge of those skilled in the art, and is not described herein again.
In a word, the utility model has the characteristics of simple structure, low power dissipation, interference killing feature are strong, easily realize miniaturization etc, are suitable for very much as unmanned aerial vehicle machine carries transceiver, especially are fit for being used for on the higher unmanned aerial vehicle of load requirement.
Claims (5)
1. An unmanned aerial vehicle frequency division transceiver is characterized by comprising a duplexer, a receiving unit, a transmitting unit and a frequency synthesizing unit; the duplexer is provided with two different frequency channels which are respectively connected with the receiving unit and the transmitting unit; the frequency synthesizing unit is used for providing a receiving local oscillator for the receiving unit and providing a transmitting local oscillator for the transmitting unit, and the frequency of the receiving local oscillator is different from that of the transmitting local oscillator;
when receiving signals, the duplexer transmits intermediate-frequency signals received by the antenna through the combiner port, filters the signals in a channel with the same frequency as the received signals, and transmits the signals to the receiving unit, and the receiving unit processes the signals and outputs the signals to the outside; when the signal is sent, the transmitting unit receives an intermediate frequency signal to be transmitted, which is input from the outside, processes the signal and transmits the processed signal to the duplexer, and the duplexer carries out filtering processing on the signal in a channel with the same frequency as the transmitting signal and then outputs the signal to the antenna through the combiner port for transmitting.
2. The unmanned aerial vehicle frequency division transceiver of claim 1, wherein the receiving unit comprises a low noise amplifier, an image frequency radio frequency filter, a first analog attenuator, a first mixer, a first intermediate frequency filter, a first intermediate frequency amplifier, a second analog attenuator, a second intermediate frequency amplifier, and a DA-to-AD converter connected in series, and the DA-to-AD converter is used for transmitting signals between an external control device and the first and second analog attenuators;
in the receiving unit, the low noise amplifier is used for level amplifying the intermediate frequency signal received by the antenna sent by the duplexer, the image frequency radio frequency filter is used for image frequency suppression of the signal sent by the low noise amplifier, the first analog attenuator is used for power adjustment of the signal sent by the image frequency radio frequency filter under the action of the external control signal sent by the DA-AD converter, the first mixer is used for receiving the receiving local oscillator provided by the frequency synthesizer and mixing the signal sent by the first analog attenuator, the first intermediate frequency filter is used for filtering the signal sent by the first mixer, the first intermediate frequency amplifier is used for power amplification of the signal sent by the first intermediate frequency filter, the second analog attenuator is used for power amplification of the external control signal sent by the DA-AD converter, the second intermediate frequency amplifier is used for carrying out power amplification and AGC control on the signal sent by the second analog attenuator and outputting the processed intermediate frequency signal to the outside; in addition, the DA-AD converter also carries out AD conversion on the voltages output by the first and second analog attenuators and feeds the voltages back to the external control equipment.
3. The unmanned aerial vehicle frequency division transceiver of claim 1, wherein the transmitting unit comprises a second if filter, a third if amplifier, a second mixer, a rf filter, an adjustable gain amplifier, and a power amplifier connected in series;
in the transmitting unit, the second intermediate frequency filter is configured to filter an externally input intermediate frequency signal to be transmitted, the third intermediate frequency amplifier is configured to amplify a signal sent by the second intermediate frequency filter, the second mixer is configured to receive a transmit local oscillator provided by the frequency synthesizer unit and mix a signal sent by the third intermediate frequency amplifier, the radio frequency filter is configured to filter a signal sent by the second mixer, the adjustable gain amplifier is configured to gain-amplify a signal sent by the radio frequency filter according to a set power level, and the power amplifier is configured to power-amplify a signal sent by the adjustable gain amplifier and send the processed signal to the duplexer.
4. The unmanned aerial vehicle frequency division transceiver of claim 1, wherein the frequency synthesizer unit comprises a receive frequency synthesizer chip, a transmit frequency synthesizer chip, and a reference crystal oscillator;
the receiving frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a receiving local oscillator and output the frequency signal to the receiving unit; the transmitting frequency integrated chip and the reference crystal oscillator carry out phase-locked output, generate a frequency signal required by a transmitting local oscillator and output the frequency signal to the transmitting unit.
5. The unmanned aerial vehicle frequency division transceiver of claim 1, wherein the diplexer is a dielectric diplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020565188.5U CN211579970U (en) | 2020-04-16 | 2020-04-16 | Unmanned aerial vehicle frequency division transceiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020565188.5U CN211579970U (en) | 2020-04-16 | 2020-04-16 | Unmanned aerial vehicle frequency division transceiver |
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| CN211579970U true CN211579970U (en) | 2020-09-25 |
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| CN202020565188.5U Expired - Fee Related CN211579970U (en) | 2020-04-16 | 2020-04-16 | Unmanned aerial vehicle frequency division transceiver |
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