CN216356719U - Transceiver, chip, system on chip and chip system for increasing 2.4GHz frequency band communication distance - Google Patents
Transceiver, chip, system on chip and chip system for increasing 2.4GHz frequency band communication distance Download PDFInfo
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- CN216356719U CN216356719U CN202122793828.5U CN202122793828U CN216356719U CN 216356719 U CN216356719 U CN 216356719U CN 202122793828 U CN202122793828 U CN 202122793828U CN 216356719 U CN216356719 U CN 216356719U
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Abstract
The application discloses a transceiver, a chip, a system on a chip and a chip system for increasing the communication distance of a 2.4GHz frequency band, which comprise a first chip, a second chip and an antenna; the working frequency band of the first chip is 2.4GHz, if the first chip is in a transmitting mode, the second chip is adjusted to be in a down-conversion mode, signals in the 2.4GHz frequency band are converted into signals in a target frequency band through the second chip, and the target frequency band is a UHF frequency band or a VHF frequency band; and transmitting a signal of a target frequency band through the antenna, wherein the working frequency band of the antenna is matched with the target frequency band. This application adds the second chip between first chip and antenna, converts the signal of 2.4GHz frequency channel into the signal of UHF frequency channel or VHF frequency channel through the second chip to the realization is under the condition that does not increase transmitting power, and both solved communication distance weak point, has solved the poor problem of wall penetrating ability again.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a transceiver, a chip, a system on a chip and a chip system for improving the communication distance of a 2.4GHz frequency band.
Background
2.4GHz is the international ISM frequency range, and because no license is needed for the use of the 2.4GHz frequency range, many wireless communication technologies are designed based on the 2.4GHz frequency range, such as Bluetooth, ZigBee, WIFI, and other proprietary protocols of 2.4 GHz. However, the 2.4GHz band has disadvantages of short communication distance and poor wall penetration capability.
At present, the defect that the 2.4GHz frequency band has a short communication distance is mainly solved by a mode of improving the transmitting power, and the defect that the 2.4GHz frequency band has poor wall penetrating capability is mainly solved by a mode of a repeater. However, according to the free space fading formula Lbf (dB) ═ 32.5+20lgf (MHz) +20lgd (km), where Lbf denotes communication loss in dB, F denotes frequency in MHz, and D denotes communication distance in km. When the communication distance D is required to be increased, the transmission power needs to be increased to compensate for the attenuation of Lbf in the formula, specifically, when the communication distance needs to be doubled, the transmission power needs to be increased by 6dB, and then according to the conversion formula dB being 10log P, the transmission power P needs to be increased to four times the unit mW by converting 6dB into a power value with mW as a unit, which is obviously irreparable in terms of power consumption. In addition, solutions that rely on repeaters to address poor wall penetration require additional cost.
Therefore, it is an urgent technical problem to provide a solution to the problem of short communication distance and poor wall penetration capability while increasing the limited power consumption.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of short communication distance and poor wall penetrating capability of a 2.4GHz frequency band in the prior art, the application provides a transceiver, a chip, a system on a chip and a chip system for improving the communication distance of the 2.4GHz frequency band.
In a first aspect, the present application provides a transceiver for increasing a 2.4GHz band communication distance, including a first chip, a second chip, and an antenna;
the working frequency band of the first chip is 2.4GHz, and the working mode of the first chip comprises a transmitting mode and a receiving mode;
the first chip is used for transmitting or receiving signals of a 2.4GHz frequency band;
the second chip is used for converting a signal in a 2.4GHz frequency band into a signal in a target frequency band when the first chip is in a transmitting mode, wherein the target frequency band is a UHF frequency band or a VHF frequency band; and the first chip is used for converting the signal of the target frequency band into a signal of a 2.4GHz frequency band when the first chip is in a receiving mode;
the antenna is used for transmitting or receiving signals of a target frequency band, and the working frequency band of the antenna is matched with the target frequency band.
In an implementation manner, the second chip is configured to, when the first chip is in a transmission mode, mix a signal in a 2.4GHz band of the first chip with a local oscillator signal inside the second chip to generate a sum-frequency signal and a difference-frequency signal; and filtering the combined frequency signal and outputting the difference frequency signal, wherein the difference frequency signal is a UHF frequency band signal or a VHF frequency band signal.
In an implementation manner, the second chip is configured to, when the first chip is in a receiving mode, mix a received signal in a target frequency band with a local oscillator signal inside the second chip to generate a sum frequency signal and a difference frequency signal; and filtering the difference frequency signal, and outputting the frequency combination signal, wherein the frequency combination signal is a signal of a 2.4GHz frequency band.
In one implementation manner, a matching network is further included between the second chip and the antenna, and the matching network is used for matching impedance between the antenna and the target frequency band.
In one implementation manner, the second chip includes a transceiving switching control port, a 2.4GHz band port, a high-pass filter, an up-converter, a low-noise amplifier, a power amplifier, a low-pass filter, a down-converter, a frequency synthesizer and a target band port;
the receiving and dispatching switching control port is used for controlling and switching the working mode of the second chip according to the working mode of the first chip;
when the first chip is in a receiving mode, the 2.4GHz frequency band port is connected with the high-pass filter, the low-noise amplifier is connected with the target frequency band port, and the up-converter is connected in series between the high-pass filter and the low-noise amplifier;
when the first chip is in a transmitting mode, the 2.4GHz frequency band port is communicated with the down converter, the power amplifier is connected with the target frequency band port, and the low-pass filter is connected between the down converter and the power amplifier in series;
the frequency synthesizer is simultaneously connected with the up converter and the down converter, when the first chip is in a receiving mode, the frequency synthesizer is used for providing a local oscillation signal to the up converter, and when the first chip is in a transmitting mode, the frequency synthesizer is used for providing the local oscillation signal to the down converter.
In a second aspect, the present application provides a chip, configured to convert a signal in a 2.4GHz band into a signal in a target band in a first trigger mode, where the target band is a UHF band or a VHF band; and in the second trigger mode, the device is used for converting the signal of the target frequency band into the signal of the 2.4GHz frequency band.
In one implementation mode, the system comprises a receiving and transmitting switching control port, a 2.4GHz frequency band port, a high-pass filter, an up-converter, a low-noise amplifier, a power amplifier, a low-pass filter, a down-converter, a frequency synthesizer and a target frequency band port;
the receiving and dispatching switching control port is used for controlling and switching the working mode of the second chip according to a trigger mode;
in a first trigger mode, the 2.4GHz band port is communicated with the down converter, the power amplifier is connected with the target band port, and the low-pass filter is connected in series between the down converter and the power amplifier, wherein the first trigger mode is a mode for transmitting 2.4GHz band signals;
in a second trigger mode, the 2.4GHz band port is connected to the high pass filter, the low noise amplifier is connected to the target band port, and the up-converter is connected in series between the high pass filter and the low noise amplifier, wherein the second trigger mode is a mode for receiving a 2.4GHz band signal;
the frequency synthesizer is simultaneously connected with the up converter and the down converter, and is used for providing local oscillation signals for the down converter in a first trigger mode and is used for providing local oscillation signals for the up converter in a second trigger mode.
In a third aspect, the present application provides a system on a chip, including a micro control unit, an on-chip bus, a baseband processing unit, a modem unit, and a radio frequency front end, where the radio frequency front end integrates a transceiver for increasing a communication distance of a 2.4GHz band as in the first aspect.
In a fourth aspect, the present application provides a chip system, including a first chip and a second chip integrally packaged;
the working frequency band of the first chip is 2.4GHz, and the working mode of the first chip comprises a transmitting mode and a receiving mode;
the first chip is used for transmitting or receiving signals of a 2.4GHz frequency band;
the second chip is used for converting a signal in a 2.4GHz frequency band into a signal in a target frequency band when the first chip is in a transmitting mode, wherein the target frequency band is a UHF frequency band or a VHF frequency band; and the first chip is used for converting the signal of the target frequency band into a signal of a 2.4GHz frequency band when the first chip is in a receiving mode.
The utility model provides an improve 2.4GHz frequency channel communication distance transceiver, a chip, system on chip and chip system, add the second chip between first chip and antenna, convert the signal of 2.4GHz frequency channel into the signal of UHF frequency channel or VHF frequency channel through the second chip, perhaps convert the signal of UHF frequency channel or VHF frequency channel into the signal of 2.4GHz frequency channel, thereby realize under the condition that does not increase transmitting power, both solved communication distance short, the poor problem of wall penetrating ability has been solved again.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a transceiver for increasing a communication distance in a 2.4GHz band according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating an operating principle of a first chip in a transmission mode in a method for increasing a 2.4GHz band communication distance according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an operating principle of a first chip in a receiving mode in a method for increasing a communication distance in a 2.4GHz band according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a second chip according to an embodiment of the present disclosure;
fig. 5 is a block diagram of a chip system according to an embodiment of the present disclosure;
fig. 6 is a schematic application scenario diagram of a transmitting and receiving process in peer-to-peer communication according to an embodiment of the present application;
fig. 7 is a block diagram of a system on chip according to an embodiment of the present disclosure.
Description of the reference numerals
10-first chip, 20-second chip, 30-antenna, 10A-first chip, 20A-second chip, 30A-antenna, 10B-first chip, 20B-second chip, 30B-antenna.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
To facilitate an understanding of the present application, the overall concepts provided by the present application will first be described.
According to the free space fading formula lbf (db) ═ 32.5+20lgf (mhz) +20lgd (km), when the communication distance D is required to be doubled, the frequency F can be reduced to half of the original frequency while maintaining the transmission power, so that if the signal in the 2.4GHz band is reduced to the UHF band or the VHF band, the communication distance D can be increased to four times of the original frequency without changing the transmission power. Compared with the 2.4GHz frequency band, the wavelength of the UHF frequency band or the VHF frequency band is longer, so that the signal diffraction capability of the UHF frequency band or the VHF frequency band is stronger, and the condition of communication interruption is less prone to occurring when a wall is shielded. Based on this, the present application provides a method for increasing a 2.4GHz band communication distance by adjusting a 2.4GHz band, and the following describes in detail the method for increasing a 2.4GHz band communication distance provided by the present application through an embodiment.
The method for increasing the communication distance of the 2.4GHz band provided by the embodiment of the present application is implemented based on a transceiver, as shown in fig. 1, the transceiver includes a first chip 10, a second chip 20, and an antenna 30.
The working frequency band of the first chip 10 is 2.4GHz, and the first chip 10 may be a wireless communication chip in a general ISM frequency band, including but not limited to a bluetooth audio chip, a bluetooth BLE chip, a ZigBee chip, and other 2.4GHz proprietary protocol chips.
The second chip 20 is a frequency conversion chip, and the second chip 20 can be used for converting a signal in a 2.4GHz band into a signal in a target band in a first trigger mode, where the target band is a UHF band or a VHF band; the second chip 20 may be configured to convert the signal of the target frequency band into a signal of a 2.4GHz frequency band in the second trigger mode.
The antenna 30 is configured to receive or transmit a UHF band or VHF band signal, where a working frequency band of the antenna is adapted to the target frequency band, for example, if the target frequency band is a UHF band, the working frequency band of the antenna includes the UHF band; for another example, the target frequency band is a VHF frequency band, and the operating frequency band of the antenna includes the VHF frequency band.
Based on the transceiver, the method for increasing the communication distance of the 2.4GHz band provided by the embodiment of the application comprises the following steps:
as shown in fig. 2, if the first chip 10 is in the transmission mode, steps 100 to 200 are performed; as shown in fig. 3, if the first chip 10 is in the receiving mode, steps 300 to 500 are performed.
Step 100, if the first chip 10 is in the transmitting mode, the second chip 20 is adjusted to be in the down-conversion mode, and the signal in the 2.4GHz band is converted into a signal in the target band through the second chip 20, wherein the target band is the UHF band or the VHF band.
The first chip 10 includes two modes of operation, a transmit mode and a receive mode, and the second chip 20 includes two modes of operation, a down-conversion mode and an up-conversion mode. In the present application, the operation mode of the second chip 20 is adjusted according to the operation mode of the first chip 10. Specifically, if the first chip 10 is in the transmitting mode, the operating mode of the second chip 20 is correspondingly adjusted to be the down-conversion mode; if the first chip 10 is in the receiving mode, the operating mode of the second chip 20 is correspondingly adjusted to be the up-conversion mode.
Further, when the second chip 20 is in the down-conversion mode, the signal in the 2.4GHz band may be converted into a signal in the target band; when the second chip 20 is in the up-conversion mode, the signal of the target frequency band can be converted into the signal of the 2.4GHz frequency band.
The method for switching the operating mode of the second chip 20 according to the operating mode of the first chip 10 is not limited in the present application, for example, the operating mode of the second chip 20 may be controlled and switched by a switching signal, where the switching signal can obtain the operating mode of the first chip 10, and further the operating mode of the second chip 20 is controlled and switched according to the operating mode of the first chip 10.
In an implementation manner, the 2.4GHz band signal of the first chip 10 and the local oscillator signal inside the second chip 20 may be mixed to generate a sum frequency signal and a difference frequency signal; then, the sum frequency signal is filtered, and a difference frequency signal is output, wherein the difference frequency signal is a UHF frequency band signal or a VHF frequency band signal.
Step 200, transmitting the signal of the target frequency band through an antenna 30, wherein the working frequency band of the antenna is adapted to the target frequency band.
The UHF band signal or the VHF band signal output from the second chip 20 is transmitted through the antenna 30.
Further, in order to optimize the signal transmission quality, the UHF band signal or the VHF band signal output by the second chip 20 may be transmitted through the antenna 30 after the impedance matching between the signal of the target band and the antenna is completed through the matching network.
Thus, through steps 100 to 200, the 2.4GHz band signal is converted into a UHF band signal or a VHF band signal, the UHF band signal or the VHF band signal can be transmitted for a longer distance, the diffraction capability is stronger, and the situation of communication interruption is less prone to occurring when a wall is shielded.
Step 300, if the first chip 10 is in the receiving mode, the second chip 20 is adjusted to be in the up-conversion mode.
Step 400, receiving the signal of the target frequency band through the antenna 30.
The antenna 30 receives a signal of a target frequency band, i.e., a UHF or VHF frequency band signal, transmitted from the transmitting end.
Step 500, converting the signal of the target frequency band into a signal of a 2.4GHz frequency band through the second chip 20.
In an implementation manner, the received signal of the target frequency band may be mixed with a local oscillator signal inside the second chip 20 to generate a sum frequency signal and a difference frequency signal; and then, filtering the difference frequency signal, and outputting a frequency combination signal, wherein the frequency combination signal is a signal of a 2.4GHz frequency band.
Further, in order to optimize the signal transmission quality, the UHF band signal or the VHF band signal received by the antenna 30 may be transmitted to the second chip 20 for processing after the impedance matching between the target band signal and the antenna is completed through the matching network.
Thus, through steps 300 to 500, the UHF band signal or the VHF band signal transmitted by the transmitting terminal can be converted into a 2.4GHz band signal in cooperation with the transmitting terminal.
In summary, in the present application, the second chip 20 is additionally disposed between the first chip 10 and the antenna 30, and the second chip 20 converts the signal in the 2.4GHz band into the signal in the UHF band or the VHF band, or converts the signal in the UHF band or the VHF band into the signal in the 2.4GHz band, so as to implement that the problem of short communication distance and poor wall penetrating capability is solved without increasing transmission power.
It should be noted that, the structure of the second chip 20 is not limited in this application, as long as the second chip can convert the signal of the 2.4GHz band into the signal of the target band in the first trigger mode (the mode of transmitting the signal of the 2.4GHz band), where the target band is the UHF band or the VHF band; in the second trigger mode (mode of receiving 2.4GHz band signals), the target band signals are converted into 2.4GHz band signals.
In one implementation, as shown in fig. 4, the second chip 20 includes a transceiving switching control port, a 2.4GHz band port, a high pass filter, an up converter, a low noise amplifier, a power amplifier, a low pass filter, a down converter, a frequency synthesizer, and a target band port. The transceiving switching control port is used for controlling and switching the working mode of the second chip according to the triggering mode (for example, the first chip is in the working mode).
In a first trigger mode (for example, when the first chip is in the transmit mode), the 2.4GHz band port is communicated with the down converter, the power amplifier is connected with the target band port, and the low-pass filter is connected in series between the down converter and the power amplifier. In the mode, the down converter is responsible for converting signals in a 2.4GHz frequency band into useless combined frequency signals and difference frequency signals in a target frequency band (such as UHF frequency band or VHF frequency band), the low-pass filter is responsible for filtering the combined frequency signals and reserving the difference frequency signals, and finally the difference frequency signals are amplified by the power amplifier and then output to a target frequency band port;
in a second trigger mode (for example, when the first chip is in the receiving mode), the 2.4GHz band port is connected to the high-pass filter, the low-noise amplifier is connected to the target band port, and the up-converter is connected in series between the high-pass filter and the low-noise amplifier. In this mode, the low-noise amplifier is used to initially amplify a signal in a target frequency band (e.g., UHF or VHF band) and send the amplified signal to the up-converter; the up-converter is responsible for converting the signal of the target frequency band into a difference frequency signal and a combined frequency signal; the high-pass filter is used for filtering low-frequency difference frequency signals and reserving 2.4 GHz-frequency-band difference frequency signals; and finally, the signal is sent to a 2.4GHz frequency band port for output.
The frequency synthesizer is simultaneously connected with the up-converter and the down-converter, and is used for providing a local oscillation signal to the up-converter and the down-converter in a first trigger mode, and is used for providing the local oscillation signal to the down-converter in a second trigger mode. The frequency of the local oscillator signal is determined by a frequency synthesizer circuit.
The present application does not limit the implementation of the second chip 20. For example: in this application, the second chip 20 may be an integrated chip, and is integrated with components for implementing corresponding functions, such as a transceiving switching control port, a 2.4GHz band port, a high-pass filter, an up-converter, a low-noise amplifier, a power amplifier, a low-pass filter, a down-converter, a frequency synthesizer, a target band port, and the like; for another example, the second chip 20 is built using individual discrete components.
It should be noted that, in the above embodiments, the first chip 10 and the second chip 20 are only illustrated as separate chips, and the structure of the first chip 10 and the second chip 20 is not limited. For example, as shown in fig. 5, the first chip 10 and the second chip 20 may be integrally packaged together to form a chip system, so that two independent chips can be integrally packaged on the same chip.
The present application is described below with reference to an application scenario of a transmitting and receiving process in peer-to-peer communication.
As shown in fig. 6, in this scenario, two transceivers of the same structure, a first transceiver and a second transceiver, are included, wherein the first transceiver and the second transceiver both adopt the structure provided in the above embodiment, that is, the first transceiver includes the first chip 10A, the second chip 20A and the antenna 30A, and the second transceiver includes the first chip 10B, the second chip 20B and the antenna 30B.
When the first chip 10A is in the transmitting mode, the second chip 20A is controlled by the switching signal to switch to the down-conversion mode corresponding to the transmitting mode, and further, the signal of the 2.4GHz band is mixed with the local oscillator signal inside the second chip 20A, a sum frequency signal and a difference frequency signal are generated after mixing, and after the sum frequency signal is filtered by the second chip 20A, a difference frequency signal of the UHF band or the VHF band is output; the difference frequency signal passes through the matching network and is transmitted to the antenna 30A.
At this time, the first chip 10B is in a receiving mode, the second chip 20B is controlled by the switching signal to be switched into an up-conversion mode corresponding to the receiving mode, the signal in the UHF or VHF band received by the antenna 30B is sent to the second chip 20B after passing through the matching network, the second chip 20B mixes the received signal in the UHF or VHF band with the local oscillator signal inside the second chip 20B, a combined frequency signal and a difference frequency signal are generated after mixing, the second chip 20B filters the difference frequency signal, outputs a combined frequency signal in the 2.4GHz band, and sends the combined frequency signal to the first chip 10B for further processing.
It should be noted that, in the above scenario, the first transceiver may also be used to receive a signal, and the second transceiver may also be used to transmit a signal, where when the first transceiver is used to receive a signal, reference may be made to the above description about the first chip 10B, and when the second transceiver is used to transmit a signal, reference may be made to the above description about the first chip 10A, and details are not described here again.
As shown in fig. 7, the present application further provides a system on chip, where the system on chip includes a micro control unit, an on chip bus, a baseband processing unit, a modem unit, and a radio frequency front end, where the radio frequency front end is integrated with the transceiver for increasing the communication distance of the 2.4GHz band provided in the foregoing embodiment.
In the system on chip provided by the application, in a transmitting mode, a micro control unit (also called MCU) transmits data to be transmitted to a baseband processing unit through an on-chip bus, the baseband processing unit performs operations such as packet packaging on the data, and different packet packaging operations exist for different communication standards; then, the data of the packet is modulated by a modulation and demodulation unit, wherein different modulation and demodulation modes are adopted for different communication standards; and finally, transmitting the modulated data to a radio frequency front end, converting the signals of the 2.4GHz frequency band into the signals of the target frequency band by the radio frequency front end, and transmitting the signals through an antenna.
In a receiving mode, a signal of a target frequency band is received by a radio frequency front end at first, and the signal of the target frequency band is converted into a signal of a 2.4GHz frequency band through the radio frequency front end; then, sending the signals of the 2.4GHz frequency band to a modulation and demodulation unit for demodulation; sending the demodulated data to a baseband processing unit for unpacking operation; and the unpacked data is sent to the MCU through the on-chip bus for further processing. The on-chip bus may be connected to other units as needed, which is not limited in this application.
In summary, the system on chip provided by the application can replace the 2.4GHz radio frequency front end in the existing general 2.4GHz radio frequency system on chip with the UHF radio frequency front end or the VHF radio frequency front end, and keep other circuit parts in the existing general 2.4GHz radio frequency system on chip unchanged, so that the problem of short communication distance and poor wall penetrating capability can be solved, and the existing circuit modules can be fully utilized.
The same and similar parts among the various embodiments in this specification may be referred to each other, and especially, the part of the embodiment corresponding to the transceiver and the system on chip for increasing the 2.4GHz band communication distance may be referred to the part of the method for increasing the 2.4GHz band communication distance.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It should also be noted that in some of the flows described in the specification and claims of this application and in the above-described figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, the number of operations being, for example, 100, 200, etc., merely to distinguish between various operations, and the number itself does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (9)
1. A transceiver for improving the communication distance of a 2.4GHz frequency band is characterized by comprising a first chip, a second chip and an antenna;
the working frequency band of the first chip is 2.4GHz, and the working mode of the first chip comprises a transmitting mode and a receiving mode;
the first chip is used for transmitting or receiving signals of a 2.4GHz frequency band;
the second chip is used for converting a signal in a 2.4GHz frequency band into a signal in a target frequency band when the first chip is in a transmitting mode, wherein the target frequency band is a UHF frequency band or a VHF frequency band; and the first chip is used for converting the signal of the target frequency band into a signal of a 2.4GHz frequency band when the first chip is in a receiving mode;
the antenna is used for transmitting or receiving signals of a target frequency band, and the working frequency band of the antenna is matched with the target frequency band.
2. The transceiver of claim 1, wherein the second chip is configured to, when the first chip is in a transmit mode, mix a 2.4GHz band signal of the first chip with a local oscillator signal inside the second chip to generate a sum-frequency signal and a difference-frequency signal; and filtering the combined frequency signal and outputting the difference frequency signal, wherein the difference frequency signal is a UHF frequency band signal or a VHF frequency band signal.
3. The transceiver of claim 1, wherein the second chip is configured to, when the first chip is in a receiving mode, mix a received signal in a target frequency band with a local oscillator signal inside the second chip to generate a sum frequency signal and a difference frequency signal; and filtering the difference frequency signal, and outputting the frequency combination signal, wherein the frequency combination signal is a signal of a 2.4GHz frequency band.
4. The transceiver of claim 1, further comprising a matching network between the second chip and the antenna, wherein the matching network is configured to match an impedance between the antenna and the target frequency band.
5. The transceiver of claim 1, wherein the second chip comprises a transceiving switching control port, a 2.4GHz band port, a high pass filter, an up-converter, a low noise amplifier, a power amplifier, a low pass filter, a down-converter, a frequency synthesizer, and a target band port;
the receiving and dispatching switching control port is used for controlling and switching the working mode of the second chip according to the working mode of the first chip;
when the first chip is in a receiving mode, the 2.4GHz frequency band port is connected with the high-pass filter, the low-noise amplifier is connected with the target frequency band port, and the up-converter is connected in series between the high-pass filter and the low-noise amplifier;
when the first chip is in a transmitting mode, the 2.4GHz frequency band port is communicated with the down converter, the power amplifier is connected with the target frequency band port, and the low-pass filter is connected between the down converter and the power amplifier in series;
the frequency synthesizer is simultaneously connected with the up converter and the down converter, when the first chip is in a receiving mode, the frequency synthesizer is used for providing a local oscillation signal to the up converter, and when the first chip is in a transmitting mode, the frequency synthesizer is used for providing the local oscillation signal to the down converter.
6. A chip is characterized in that in a first trigger mode, the chip is used for converting a signal of a 2.4GHz frequency band into a signal of a target frequency band, wherein the target frequency band is a UHF frequency band or a VHF frequency band; and in the second trigger mode, the device is used for converting the signal of the target frequency band into the signal of the 2.4GHz frequency band.
7. The chip of claim 6, comprising a transceiving switching control port, a 2.4GHz band port, a high-pass filter, an up-converter, a low-noise amplifier, a power amplifier, a low-pass filter, a down-converter, a frequency synthesizer and a target band port;
the receiving and dispatching switching control port is used for controlling and switching the working mode of the chip according to a trigger mode;
in a first trigger mode, the 2.4GHz band port is communicated with the down converter, the power amplifier is connected with the target band port, and the low-pass filter is connected in series between the down converter and the power amplifier, wherein the first trigger mode is a mode for transmitting 2.4GHz band signals;
in a second trigger mode, the 2.4GHz band port is connected to the high pass filter, the low noise amplifier is connected to the target band port, and the up-converter is connected in series between the high pass filter and the low noise amplifier, wherein the second trigger mode is a mode for receiving a 2.4GHz band signal;
the frequency synthesizer is simultaneously connected with the up converter and the down converter, and is used for providing local oscillation signals for the down converter in a first trigger mode and is used for providing local oscillation signals for the up converter in a second trigger mode.
8. A system on chip, comprising a micro control unit, an on-chip bus, a baseband processing unit, a modem unit, and a radio frequency front end, wherein the radio frequency front end integrates the transceiver according to claim 1 for increasing the communication distance of the 2.4GHz band.
9. A chip system is characterized by comprising a first chip and a second chip which are integrally packaged;
the working frequency band of the first chip is 2.4GHz, and the working mode of the first chip comprises a transmitting mode and a receiving mode;
the first chip is used for transmitting or receiving signals of a 2.4GHz frequency band;
the second chip is used for converting a signal in a 2.4GHz frequency band into a signal in a target frequency band when the first chip is in a transmitting mode, wherein the target frequency band is a UHF frequency band or a VHF frequency band; and the first chip is used for converting the signal of the target frequency band into a signal of a 2.4GHz frequency band when the first chip is in a receiving mode.
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