CN216794986U - Antenna connection circuit, device and unmanned equipment - Google Patents

Abstract

The application discloses antenna connecting circuit, device and unmanned equipment, this antenna connecting circuit includes: satellite antenna, cellular antenna, combiner subassembly, isolation component, satellite receiver and honeycomb baseband, wherein: the satellite receiver is connected with the first end of the isolation assembly, the cellular baseband is connected with the second end of the isolation assembly, the third end of the isolation assembly is connected with the third end of the combiner assembly, the first end and the second end of the isolation assembly are isolation ends, the second end and the third end of the isolation assembly are conduction ends, and the first end and the third end of the isolation assembly are conduction ends; the first end of the combining component is connected with the cellular antenna, and the second end of the combining component is connected with the satellite antenna; the first end and the third end of the combining assembly are conducting ends, the second end and the third end of the combining assembly are conducting ends, and the first end and the second end of the combining assembly are isolating ends. Through the technical means, the problems that the wiring structure of the coaxial line in the communication system is complex and large in size in the prior art are solved.

Description

Antenna connection circuit, device and unmanned equipment

Technical Field

The application relates to the technical field of unmanned equipment, in particular to an antenna connecting circuit, an antenna connecting device and the unmanned equipment.

Background

The unmanned aerial vehicle is equipped with a cellular communication system connected with a cloud server and a satellite communication system for positioning and navigating the unmanned aerial vehicle. The unmanned equipment carries out data communication through the satellite communication system and the cellular communication system so as to complete various work tasks.

At present, both a satellite communication system and a cellular communication system of unmanned equipment are provided with a corresponding signal processing unit and an antenna, the signal processing unit and the antenna are connected through a coaxial line, and wireless signals are received through the antenna and processed by the signal processing unit. However, since the signal processing units and the antennas cannot be arranged close to each other, each signal processing unit and the corresponding antenna are connected through a long coaxial line, so that the wiring structure of the coaxial line in the communication system is complex and large in size, the miniaturization arrangement of unmanned equipment is not facilitated, and the production, assembly and fault maintenance are not facilitated.

SUMMERY OF THE UTILITY MODEL

The application provides an antenna connection circuit, device and unmanned equipment, has solved the complicated and bulky problem of wiring structure of the inside coaxial line of communication system among the prior art, reduces coaxial line quantity and simplifies the wiring structure of coaxial line, reduces the operation degree of difficulty of production equipment and maintenance.

In a first aspect, the present application provides an antenna connection circuit, including: satellite antenna, cellular antenna, combiner subassembly, isolation component, satellite receiver and honeycomb baseband, wherein:

the satellite receiver is connected with a first end of the isolation assembly, the cellular baseband is connected with a second end of the isolation assembly, a third end of the isolation assembly is connected with a third end of the combiner assembly, the first end and the second end of the isolation assembly are isolation ends, the second end and the third end of the isolation assembly are conduction ends, and the first end and the third end of the isolation assembly are conduction ends;

the first end of the combiner assembly is connected with the cellular antenna, and the second end of the combiner assembly is connected with the satellite antenna; the first end and the third end of the combining assembly are mutually conducted ends, the second end and the third end of the combining assembly are mutually conducted ends, and the first end and the second end of the combining assembly are mutually isolated ends.

In a second aspect, the present application provides an antenna connection device, comprising: signal processing module, antenna module and single coaxial line, signal processing module includes honeycomb baseband, satellite receiver and isolation component, antenna module includes satellite antenna, honeycomb antenna and closes way subassembly, wherein:

the satellite receiver is connected with a first end of the isolation assembly, the cellular baseband is connected with a second end of the isolation assembly, a third end of the isolation assembly is connected with a third end of the combining assembly through the single coaxial line, the first end and the second end of the isolation assembly are isolation ends, the second end and the third end of the isolation assembly are conduction ends, and the first end and the third end of the isolation assembly are conduction ends;

the first end of the combining component is connected with the satellite antenna, and the second end of the combining component is connected with the satellite antenna; the first end and the third end of the combining assembly are mutually conducted ends, the second end and the third end of the combining assembly are mutually conducted ends, and the first end and the second end of the combining assembly are mutually isolated ends.

In a third aspect, the present application provides an unmanned device comprising an antenna connection circuit as described in the first aspect.

This application sets up respectively in two isolation ends of isolation subassembly through satellite receiver and honeycomb baseband to the honeycomb up signal that sends the honeycomb baseband is kept apart with satellite receiver through isolation subassembly, avoids satellite receiver to receive great signal and leads to inside low noise amplifier to block. The satellite downlink signal and the cellular downlink signal are combined through the combiner component and are transmitted to the isolation component coaxially, and the combined signal is transmitted to the satellite receiver and the cellular baseband through the isolation component, so that single coaxial line transmission of the uplink signal and the downlink signal is realized. Through single coaxial line transmission multichannel antenna signal, reduce coaxial line quantity and simplify the wiring structure of coaxial line, reduce the operation degree of difficulty of production equipment and maintenance, reduce communication system's volume, be favorable to unmanned equipment's miniaturized setting.

Drawings

Fig. 1 is a schematic block diagram of an antenna connection circuit according to an embodiment of the present application;

fig. 2 is a first schematic diagram of an antenna connection circuit provided in an embodiment of the present application;

fig. 3 is a second schematic diagram of an antenna connection circuit provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a first directional coupler provided in an embodiment of the present application;

fig. 5 is a third schematic diagram of an antenna connection circuit provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a circulator provided by an embodiment of the application;

fig. 7 is a fourth schematic diagram of an antenna connection circuit provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of an antenna connection device according to an embodiment of the present application;

in the figure, 100, a satellite receiver; 101. an RTK receiver; 200. a cellular baseband; 201. an LTE baseband; 300. an isolation component; 301. a first directional coupler; 302. a first circulator; 303. a second circulator; 304. a first coupler; 400. a combiner assembly; 401. a second directional coupler; 500. a cellular antenna; 501. an LTE antenna; 600. a satellite antenna; 601. an RTK antenna; 602. an amplifier; 700. a WIFI baseband; 701. a first duplexer; 702. a second duplexer; 703. a WIFI antenna; 800. a signal processing module; 801. a control unit; 900. an antenna module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application.

In the description of the embodiments of the present application, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In an embodiment, the cellular communication system carried by the unmanned aerial vehicle is an LTE communication system, the satellite communication system is an RTK positioning system, the unmanned aerial vehicle is also carried by a WIFI communication system, and each communication system is configured with a corresponding antenna and a corresponding signal processing module. The signal processing module is generally arranged close to a main control board of the unmanned equipment, the signal processing module is connected with the main control board through an antenna serial port, the antenna is arranged at the top of the unmanned equipment, and the antenna and the signal processing module are connected through a long coaxial line. Because the LTE communication system, the RTK positioning system and the WIFI communication system all need to be configured with the coaxial line connecting antenna and the signal processing module, the number of the coaxial lines used by the unmanned equipment is too large, the cost waste is caused, meanwhile, the weight and the size of the unmanned equipment are increased, and the miniaturization setting of the unmanned equipment is not facilitated. The coaxial lines between the antennas and the signal processing module have complicated wiring structures, and are not favorable for production assembly and fault maintenance.

In order to solve the above problem, an embodiment of the present application provides an antenna connection circuit.

In an embodiment, in order to solve the problem of complicated coaxial line connection caused by the three coaxial line connecting antennas and the signal processing module arranged in the three communication systems, multiple antenna signals can be combined, and then a single coaxial line is adopted for combined signal transmission, so that the number of coaxial lines is reduced. In the prior art, a multi-path antenna signal combining transmission mode is realized by combining multi-path antenna signals by using a pilot frequency combiner, and then separating the combined signals into multi-path antenna signals by using the pilot frequency combiner. The pilot frequency combiner adopts an integrated filter, and when the frequencies of two antenna signals are close, the isolation of the two antenna signals cannot be ensured, so that the antenna signals with close frequencies cannot be combined and separated through the pilot frequency combiner. The RTK is a dual-frequency Band, the frequency range of the RTK is distributed in 1176-1590MHz, and the frequency point used by the RTK is close to the frequency point 1710MHz used by the LTE Band3, so that the existing pilot frequency combiner cannot be used for combining and separating the antenna signals of the RTK L5 and the LTE Band3 with low differential loss. Therefore, if the communication system in the prior art wants to combine the WIFI antenna signal, the RTK antenna signal, and the LTE antenna signal for transmission, the communication system needs to discard the RTK antenna signal or the LTE antenna signal, otherwise, combine transmission is implemented, so that the existing communication system cannot implement full-network communication.

Therefore, the isolation assembly is adopted in the antenna connection circuit based on the operating characteristics of the RTK and the LTE, so that the isolation assembly is used for combining the antenna signals of the RTK and the LTE and ensuring high isolation between the antenna signals of the RTK and the LTE, and the two antenna signals are not affected by each other.

Fig. 1 is a schematic block diagram of an antenna connection circuit according to an embodiment of the present application. As shown in fig. 1, the antenna connection circuit includes a satellite antenna 600, a cellular antenna 500, a combining component 400, an isolating component 300, a satellite receiver 100 and a cellular baseband 200, the satellite receiver 100 is connected to a first end of the isolating component 300, the cellular baseband 200 is connected to a second end of the isolating component 300, a third end of the isolating component 300 is connected to a third end of the combining component 400, the first end and the second end of the isolating component 300 are isolated ends, the second end and the third end of the isolating component 300 are conducting ends, and the first end and the third end of the isolating component 300 are conducting ends; a first end of the combining component 400 is connected to the cellular antenna 500, and a second end of the combining component 400 is connected to the satellite antenna 600; the first end and the third end of the combiner module 400 are conductive ends, the second end and the third end of the combiner module 400 are conductive ends, and the first end and the second end of the combiner module 400 are isolated ends. When two ports of the isolation component or the combining component are conduction terminals, a signal is input from one port and can be output from the other port. When two ports of the isolation assembly or the combining assembly are isolation ends, a signal is input from one port, and cannot be output from the other port. Illustratively, when a signal is input to one end of the isolation component 300, the signal is output from the conducting end, but not from the isolating end. When different signals are simultaneously input to the second terminal and the first terminal of the combining component 400, the different signals are combined and output from the third terminal.

In an embodiment, fig. 2 is a first schematic diagram of an antenna connection circuit provided in an embodiment of the present application. As shown in fig. 2, the combining component 400 is a second directional coupler 401, the cellular antenna 500 is connected to a first end of the second directional coupler 401, the satellite antenna 600 is connected to a second end of the second directional coupler 401, and a third end of the second directional coupler 401 is connected to a third end of the isolating component 300; the first end and the third end of the second directional coupler 401 are straight ends, and the second end and the third end of the second directional coupler 401 are coupled ends. When a signal is input to one end of the coupler, most of the signal is output from the through end, and a small part of the signal is output from the coupling end. Illustratively, the satellite antenna 600 is an RTK antenna 601, the cellular antenna 500 is an LTE antenna 501, the satellite downlink signal is an RTK downlink signal, and the cellular downlink signal is an LTE downlink signal. The RTK antenna 601 is configured to receive an RTK downlink signal and transmit the RTK downlink signal to the second end of the second directional coupler 401, and the LTE antenna 501 is configured to receive an LTE downlink signal and transmit the LTE downlink signal to the first end of the second directional coupler 401. When the first end of the second directional coupler 401 receives the LTE downlink signal and the second end receives the RTK downlink signal, the third end of the second directional coupler 401 combines the LTE downlink signal and the RTK downlink signal and then sends the combined signal to the isolation component 300 through the single coaxial line. The isolation component 300 transmits the LTE downlink signal and/or the RTK downlink signal to the LTE baseband 201 and the RTK receiver 101, so that coaxial transmission of multiple downlink signals is realized.

It should be noted that the combiner module 400 also employs a three-port general coupler, and in order to make each port of the general coupler have no signal reflection, the impedance of the signal input end needs to be equal to the parallel value of the impedances of other ports, but when each port can be used as a signal input end, the optimal impedance design cannot be solved. When the combiner module 400 employs a directional coupler, the ports are not directly connected, so that no signal is reflected by each port, and the energy utilization rate is improved.

In one embodiment, the satellite receiver 100 is an RTK receiver 101 and the cellular baseband 200 is an LTE baseband 201. The RTK receiver 101 is configured to receive an RTK downlink signal sent by the RTK antenna 601, and the LTE baseband 201 is configured to receive an LTE downlink signal sent by the LTE antenna 501 and send an LTE uplink signal to the LTE antenna 501. Since the RTK receiver 101 only has the characteristic of receiving and not transmitting, only the LTE uplink signal that can interfere with the RTK downlink signal is present. If the LTE uplink signal is not isolated from the RTK receiver 101, a larger LTE uplink signal may enter the direct RTK receiver 101, which may cause a low noise amplifier in the RTK receiver to block, and the RTK receiver 101 may not work normally, so that the signal entering the RTK receiver 101 needs to be small enough, for example, less than 0 dbm. While the LTE downlink signal received by the LTE antenna 501 is usually small, for example, -60dbm, the RTK downlink signal received by the RTK antenna 601 is not too large, for example, less than-125 dbm, even if the RTK downlink signal is amplified and attenuated to the RTK receiver 101, the RTK downlink signal and the LTE downlink signal are not too large, for example, less than-100 dbm, so that the RTK downlink signal and the LTE downlink signal do not cause the blocking of the low-noise amplifier inside the RTK receiver 101. Therefore, to realize coaxial transmission of the LTE signal and the RTK signal, the LTE uplink signal needs to be isolated from the RTK receiver 101.

In this embodiment, the RTK receiver 101 is connected to a first end of the isolation component 300, the LTE baseband 201 is connected to a second end of the isolation component 300, and the first end and the second end of the isolation component 300 are isolated from each other. Signals of the first end and the second end of the isolation component 300 cannot be communicated with each other, so that an LTE uplink signal sent by the LTE baseband 201 cannot be transmitted to the RTK receiver 101, and high isolation between the LTE uplink signal and the RTK receiver 101 is realized. Further, a third terminal of the second directional coupler 401 is connected to a third terminal of the isolation component 300, the third terminal and the first terminal of the isolation component 300 are conducted terminals, and the third terminal and the second terminal are conducted terminals, that is, signals of the third terminal and the first terminal may be communicated with each other, and signals of the third terminal and the second terminal may also be communicated with each other. Therefore, the RTK downlink signal and/or the LTE downlink signal transmitted from the third terminal of the second directional coupler 401 to the third terminal of the isolation component 300 through the single coaxial line may be transmitted to the RTK receiver 101 and the LTE baseband 201. The LTE uplink signal transmitted from the LTE baseband 201 to the second end of the isolation component 300 can also be normally transmitted to the combiner component 400, so that coaxial transmission of the LTE signal and the RTK signal is realized.

In an embodiment, when the first end and the second end of the combiner assembly 400 receive an LTE downlink signal sent by an LTE antenna and an RTK downlink signal sent by an RTK antenna at the same time, the two downlink signals are combined, the combined signals are transmitted to the RTK receiver 101 and the LTE baseband 201 through the single coaxial line and the isolation assembly 300, and the separation of the downlink signals is completed inside the RTK receiver 101 and the LTE baseband 201. In this embodiment, the satellite receiver 100 comprises a first mixing module and a first filtering module, wherein: a first mixing module, configured to mix a signal received by the satellite receiver 100 into a first intermediate frequency signal; and the first filtering module is used for filtering the first intermediate frequency signal to obtain a satellite downlink signal. Likewise, the cellular baseband 200 comprises a second mixing module and a second filtering module, wherein: a second mixing module, configured to mix a signal received by the cellular baseband 200 into a second intermediate frequency signal; and the second filtering module is used for filtering the second intermediate frequency signal to obtain a cellular downlink signal. Illustratively, although the RTK receiver 101 receives the RTK downlink signal and the LTE downlink signal, the mixed intermediate frequency signal is not located on the intermediate frequency bandwidth of the LTE downlink signal, and therefore the LTE downlink signal can be filtered. Similarly, although the LTE baseband 201 receives the RTK downlink signal and the LTE downlink signal, the mixed intermediate frequency signal is not located on the intermediate frequency bandwidth of the RTK downlink signal, and therefore the RTK downlink signal can be filtered.

In an embodiment, fig. 3 is a second schematic diagram of an antenna connection circuit provided in an embodiment of the present application. As shown in fig. 3, the isolating component 300 is a first directional coupler 301, the satellite receiver 100 is connected to a first end of the first directional coupler 301, the cellular baseband 200 is connected to a second end of the first directional coupler 301, a third end of the first directional coupler 301 is connected to a third end of the combiner component 400, the first end and the second end of the first directional coupler 301 are isolated ends, the first end and the third end of the first directional coupler 301 are coupled ends, and the second end and the third end of the first directional coupler 301 are straight-through ends. Illustratively, fig. 4 is a schematic structural diagram of a first directional coupler provided in an embodiment of the present application. As shown in fig. 4, the a end and the B end of the first directional coupler 301 are straight ends, the C end and the D end are straight ends, the a end and the C end are isolated ends, the B end and the D end are isolated ends, the B end and the C end are coupled ends, and the a end and the D end are coupled ends. If a signal is input from a certain end of the first directional coupler 301, most of the signal is output from the through terminal, a small part of the signal is output from the coupled terminal, and no signal is output from the isolated terminal. Therefore, when the RTK receiver 101 and the LTE baseband 201 are connected to the C terminal and the a terminal of the first directional coupler 301, which are isolated terminals, the first directional coupler 301 isolates the LTE uplink signal transmitted by the LTE baseband 201 from the RTK receiver 101. When the LTE baseband 201 and the combining component 400 are connected to the a end and the B end of the first directional coupler 301, which are straight ends, each other, the first directional coupler 301 sends the downlink signal transmitted by the combining component 400 to the LTE baseband 201, and the first directional coupler 301 transmits the LTE uplink signal transmitted by the LTE baseband 201 to the combining component 400. When the RTK receiver 101 and the combiner module 400 are connected to the C terminal and the B terminal of the first directional coupler 301, which are mutually coupled terminals, the first directional coupler 301 sends the downlink signal transmitted by the combiner module 400 to the RTK receiver 101.

In an embodiment, fig. 5 is a third schematic diagram of an antenna connection circuit provided in the embodiment of the present application. As shown in fig. 5, the isolation assembly 300 includes a first circulator 302, a second circulator 303, and a first coupler 304, wherein: the cellular baseband 200 is connected with a first end of the first circulator 302, a second end of the first circulator 302 is connected with a first end of the second circulator 303, a second end of the second circulator 303 is connected with a third end of the combining assembly 400, a third end of the second circulator 303 is connected with a first end of the first coupler 304, a second end of the first coupler 304 is connected with the satellite receiver 100, and a third end of the first coupler 304 is connected with a third end of the first circulator 302; the first end, the second end and the third end of the first circulator 302 are sequentially arranged in a clockwise direction, the first end, the second end and the third end of the second circulator 303 are sequentially arranged in a clockwise direction, the first end and the second end of the first coupler 304 are coupled ends, and the first end and the third end of the first coupler 304 are straight-through ends. For example, fig. 6 is a schematic structural diagram of a circulator provided by an embodiment of the present application. As shown in fig. 6, the terminals E, F and G of the circulator are sequentially arranged clockwise, the signal input from the terminal E is output from the terminal F, the signal input from the terminal F is output from the terminal G, and the signal input from the terminal G is output from the terminal E. When an LTE uplink signal transmitted by the LTE baseband 201 is input from the E terminal of the first circulator 302 and output from the F terminal of the first circulator 302, and then is input from the E terminal of the second circulator 303 and output from the F terminal of the second circulator 303, the LTE uplink signal is transmitted to the combiner component 400. Since the RTK receiver 101 is connected to the G end of the second circulator 303 through the first coupler 304, the LTE uplink signal input from the E end of the second circulator 303 does not enter the RTK receiver 101, thereby realizing isolation between the RTK receiver 101 and the LTE uplink signal. Further, the RTK downlink signal and/or the LTE downlink signal transmitted by the third terminal of the combining component 400 is input from the F terminal of the second circulator 303 and output from the G terminal to the first terminal of the first coupler 304. The RTK receiver 101 is connected to the second end of the first coupler 304, and the first coupler 304 transmits a small part of the RTK downlink signal and/or the LTE downlink signal to the RTK receiver 101. The first coupler 304 inputs most of the RTK downlink signal and/or the LTE downlink signal to the G end of the first circulator 302, and the E end of the first circulator 302 sends the RTK downlink signal and/or the LTE downlink signal to the LTE baseband 201, so that coaxial transmission of multiple signals is realized.

In this embodiment, the coupler in the isolation component 300 may be a low-coupling coupler, such as a-10 db coupler, to avoid the reception sensitivity of the LTE downlink signal from being affected by too much attenuation during downlink.

In this embodiment, referring to fig. 3 and 5, the antenna connection circuit 400 further includes an amplifier 602, the satellite antenna 600 is connected to a first terminal of the amplifier 602, and a second terminal of the amplifier 602 is connected to a second terminal of the second directional coupler 401. Illustratively, since the signal link from the RTK antenna 601 to the RTK receiver 101 is always disposed at the coupling end of the coupler or the first directional coupler 301, the RTK downlink signal may be attenuated when passing through the coupler or the first directional coupler 301. The amplifier 602 is therefore configured to amplify the RTK downlink signal to avoid the RTK downlink signal from degrading the receiving sensitivity of the RTK receiver 101 due to attenuation.

It should be noted that, since the LTE antenna 501 is a passive antenna, if an excessive insertion loss is introduced into the LTE signal link, the transmission power of the LTE baseband 201 may be increased to compensate for the loss of the LTE uplink signal, but the loss of the LTE downlink signal may directly affect the receiving sensitivity of the LTE baseband 201. For example, the reception sensitivity of the LTE baseband 201 is small, for example, -120dbm, if the loss from the LTE antenna 501 to the LTE baseband 201 is small, for example, 1db, the reception sensitivity of the LTE baseband 201 is-119 dbm, but if the loss is large, for example, 10dbm, the reception sensitivity of the LTE baseband 201 drops to-110 dbm. Therefore, the signal link from the LTE antenna 501 to the LTE baseband 201 is always arranged at the through end of the coupler or the directional coupler, so as to avoid the loss of the LTE downlink signal from affecting the receiving sensitivity. The RTK antenna 601 is an active antenna, and an RTK downlink signal can be amplified by the amplifier 602. Even though the amplified RTK downlink signal is attenuated by the coupler or the directional coupler, the amplified RTK downlink signal is stronger than the RTK antenna 601 in reception, and the reception sensitivity of the RTK receiver 101 is not reduced. Therefore, the signal link from the RTK antenna 601 to the RTK receiver 101 is always arranged at the coupling end of the coupler or the directional coupler, and the receiving sensitivity of the RTK receiver 101 to the RTK downlink signal is not affected.

In another embodiment, if the LTE antenna 501 is an active antenna, the signal link from the LTE antenna 501 to the LTE baseband 201 may be always disposed at the coupling end of the coupler or the directional coupler. Although the coupling end of the coupler or the directional coupler causes a large difference loss to the LTE downlink signal, an amplifier may be provided on the LTE antenna side, and the LTE downlink signal may be amplified by the amplifier. Similarly, even if the LTE downlink signal after amplification is attenuated by the coupler or the directional coupler, the LTE downlink signal can be received by the LTE antenna 601 more strongly, and the reception sensitivity of the LTE baseband 201 is not reduced.

In an embodiment, when the unmanned device is loaded with the WIFI communication system, because the WIFI signal is mainly distributed in two frequency bands of 2.4G and 5G, the frequency difference between the WIFI signal and the LTE signal is large, and the frequency difference between the WIFI signal and the RTK signal is also large, the WIFI signal and the other two signals can be merged or isolated through the duplexer. The WIFI signal, the LTE signal and the RTK signal can be combined and transmitted to the other duplexer through one duplexer, the WIFI signal, the LTE signal and the RTK signal can be separated through the other duplexer, the WIFI signal is transmitted to the WIFI baseband, and the LTE signal and the RTK signal are transmitted to the LTE baseband and the RTK receiver so as to realize coaxial transmission of the three signals. In this embodiment, fig. 7 is a fourth schematic diagram of an antenna connection circuit provided in an embodiment of the present application. As shown in fig. 7, the antenna connection circuit further includes: a WIFI baseband 700, a first duplexer 701, a second duplexer 702, and a WIFI antenna 703. Wherein: the WIFI baseband 700 is connected to a first end of the first duplexer 701, a third end of the isolation component 300 is connected to a second end of the first duplexer 701, a third end of the first duplexer 701 is connected to a third end of the second duplexer 702, a first end of the second duplexer 702 is connected to a third end of the combiner component 400, and a second end of the second duplexer 702 is connected to the WIFI antenna 703.

Illustratively, the WIFI baseband 700 sends a WIFI uplink signal to a first end of the first duplexer 701, the isolation component 300 sends an LTE uplink signal to a second end of the first duplexer 701, and the first duplexer 701 combines the WIFI uplink signal and the LTE uplink signal and outputs the combined WIFI uplink signal and LTE uplink signal from a third end. A single coaxial line is arranged between the first duplexer 701 and the second duplexer 702, the first duplexer 701 transmits the combined signal to a third end of the second duplexer 702 through the single coaxial line, the second duplexer 702 separates a WIFI uplink signal and an LTE uplink signal in the combined signal, outputs the WIFI uplink signal from the second end, and outputs the LTE uplink signal from the first end. WIFI uplink signals are transmitted to the WIFI antenna 703, LTE uplink signals are transmitted to the LTE antenna 501, and coaxial transmission of multiple paths of uplink signals is achieved.

Further, the WIFI antenna 703 transmits the WIFI downlink signal to the second end of the second duplexer 702, the combiner assembly 400 transmits the RTK downlink signal and/or the LTE downlink signal to the first end of the second duplexer 702, and the second duplexer 702 combines the WIFI downlink signal with the RTK downlink signal and/or the LTE downlink signal and outputs the combined signal from the third end. The second duplexer 702 transmits the combined signal to the third end of the first duplexer 701 through the single coaxial line, the first duplexer 701 transmits the WIFI downlink signal and the RTK downlink signal and/or the LTE downlink signal in the combined signal, outputs the RTK downlink signal and/or the LTE downlink signal from the second end, and outputs the WIFI downlink signal from the first end. The WIFI downlink signal is transmitted to the WIFI baseband 700, the RTK downlink signal and/or the LTE downlink signal is transmitted to the LTE baseband 201 and the RTK receiver 101, the mixed signal is separated from the interiors of the LTE baseband 201 and the RTK receiver 101, and coaxial transmission of the multi-channel downlink signal is achieved.

In this embodiment, due to the large frequency separation between the LTE signal and the WIFI signal, the duplexer differential loss is small, for example set to 0.3db, the differential loss between the second directional coupler 401 and the first directional coupler 301 is large, for example set to 10db, or the differential loss between the first coupler 304 and the second directional coupler 401 is large, for example set to 10db, and the amplification factor of the amplifier 602 is such that the RTK downlink signal received by the RTK receiver is larger than the downlink signal received by the RTK antenna, for example set to 40 db. Illustratively, the RTK downlink signal is amplified by 40db by the amplifier 602, then loses 10db by the second directional coupler 401, loses 0.6db by the first duplexer 701 and the second duplexer 702, loses 10db by the first directional coupler 301 or the first coupler 304, and finally has 19.4db more gain than the original signal, so that the receiving sensitivity of the RTK downlink signal is ensured. In this embodiment, when the coupling coefficient of the coupler and the first directional coupler 301 is 10db, the through-end difference loss is 0.4 db. Therefore, the loss of the LTE uplink signal or the LTE downlink signal in the transmission process is 1.4db, and the loss influence is small. The WIFI uplink signal or the WIFI downlink signal only passes through the two duplexers, the loss is 0.6, and the loss influence is small. The antenna connection circuit provided by the embodiment can ensure the receiving sensitivity of signals.

In summary, in the antenna connection circuit provided in the embodiment of the present application, the satellite receiver 100 and the cellular baseband 200 are respectively disposed at two isolation ends of the isolation component 300, so that the cellular uplink signal sent by the cellular baseband 200 is isolated from the satellite receiver 100 by the isolation component 300, and the satellite receiver 100 is prevented from receiving a larger signal to cause the internal low noise amplifier 602 to be blocked. The satellite downlink signal and the cellular downlink signal are combined through the combiner component 400 to be coaxially transmitted to the isolation component 300, and the combined signal is transmitted to the satellite receiver 100 and the cellular baseband 200 through the isolation component 300, so that single coaxial transmission of the uplink signal and the downlink signal is realized. Through single coaxial line transmission multichannel antenna signal, reduce coaxial line quantity and simplify the wiring structure of coaxial line, reduce the operation degree of difficulty of production equipment and maintenance, reduce communication system's volume, be favorable to unmanned equipment's miniaturized setting.

On the basis of the above embodiments, fig. 8 is a schematic structural diagram of an antenna connection device provided in an embodiment of the present application. As shown in fig. 8, the antenna connection device includes a signal processing module 800, an antenna module 900 and a single coaxial line, the signal processing module 800 includes a cellular baseband 200, a satellite receiver 100 and an isolation assembly 300, the antenna module 900 includes a satellite antenna 600, a cellular antenna 500 and a combining assembly 400, wherein: the satellite receiver 100 is connected to a first end of the isolation component 300, the cellular baseband 200 is connected to a second end of the isolation component 300, the third end of the isolation component 300 is connected to a third end of the combiner component 400 through a single coaxial line, the first end and the second end of the isolation component 300 are isolation ends, the second end and the third end of the isolation component 300 are conduction ends, and the first end and the third end of the isolation component 300 are conduction ends; a first end of the combining component 400 is connected to the satellite antenna 600, and a second end of the combining component 400 is connected to the satellite antenna 600; the first end and the third end of the combiner module 400 are conductive ends, the second end and the third end of the combiner module 400 are conductive ends, and the first end and the second end of the combiner module 400 are isolated ends.

In an embodiment, referring to fig. 8, the signal processing module 800 further includes a control unit 801, a WIFI baseband 700, and a first duplexer 701, and the antenna module 900 further includes a second duplexer 702 and a WIFI antenna 703. The WIFI baseband 700 is connected to a first end of the first duplexer 701, a third end of the isolation component 300 is connected to a second end of the first duplexer 701, a third end of the first duplexer 701 is connected to a third end of the second duplexer 702, a first end of the second duplexer 702 is connected to a third end of the combiner component 400, and a second end of the second duplexer 702 is connected to the WIFI antenna 703. The control unit 801 is connected to the WIFI baseband 700, the cellular baseband 200, and the satellite receiver 100.

Illustratively, the antenna module is configured to receive downlink signals through the cellular antenna 500, the satellite antenna 600 and the WIFI antenna 703, combine the downlink signals, and transmit the combined downlink signals to the signal processing module 800 through a single coaxial line, where the signal processing module 800 separates the combined signals into downlink signals of multiple antennas, and sequentially sends the downlink signals to the main control board through the control unit 801. The signal processing module 800 receives a signal sending instruction of the main control board, controls the WIFI baseband 700 and the cellular baseband 200 to send uplink signals according to the signal sending instruction, combines the two uplink signals, and transmits the combined uplink signals to the antenna module 900 through a channel. The antenna module 900 separates the combined signals and sends corresponding uplink signals through the WIFI antenna 703 and the cellular antenna 500500.

To sum up, the antenna connection device provided by the embodiment of the present application sets up WIFI antenna 703, cellular antenna 500 and satellite antenna 600 as antenna module 900 in an integrated manner, so as to reduce the size of the antenna end. The WIFI baseband 700, the cellular baseband 200, and the satellite receiver 100 are integrally provided as a signal processing module 800 to reduce the size of the signal processing terminal. Through single coaxial line connection signal processing module 800 and antenna module 900, reduce coaxial line quantity and simplify the wiring structure of coaxial line, be convenient for production equipment and troubleshooting, be favorable to unmanned equipment's miniaturized setting.

On the basis of the above embodiment, the embodiment of the present application further provides an unmanned device, where the unmanned device (for example, an unmanned aerial vehicle device) is provided with the antenna connection circuit provided in the above embodiment, and performs data communication and realizes miniaturized setting of the unmanned device through the antenna connection circuit.

As described above, the antenna connection device provided with the antenna connection circuit is mounted in the unmanned aerial vehicle, and the satellite receiver 100 and the cellular baseband 200 are respectively disposed at two isolation ends of the isolation component 300, so that the cellular uplink signal transmitted by the cellular baseband 200 is isolated from the satellite receiver 100 by the isolation component 300, and the satellite receiver 100 is prevented from receiving a large signal and causing the internal low noise amplifier 602 to be blocked. The satellite downlink signal and the cellular downlink signal are combined through the combiner component 400 to be coaxially transmitted to the isolation component 300, and the combined signal is transmitted to the satellite receiver 100 and the cellular baseband 200 through the isolation component 300, so that single coaxial transmission of the uplink signal and the downlink signal is realized. Through single coaxial line transmission multichannel antenna signal, reduce coaxial line quantity and simplify the wiring structure of coaxial line, reduce the operation degree of difficulty of production equipment and maintenance, reduce communication system's volume, be favorable to unmanned equipment's miniaturized setting.

The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.

Claims (10)

1. An antenna connection circuit, comprising: satellite antenna, cellular antenna, way combination subassembly, isolation component, satellite receiver and cellular baseband, wherein:

the satellite receiver is connected with a first end of the isolation assembly, the cellular baseband is connected with a second end of the isolation assembly, a third end of the isolation assembly is connected with a third end of the combiner assembly, the first end and the second end of the isolation assembly are isolation ends, the second end and the third end of the isolation assembly are conduction ends, and the first end and the third end of the isolation assembly are conduction ends;

the first end of the combiner assembly is connected with the cellular antenna, and the second end of the combiner assembly is connected with the satellite antenna; the first end and the third end of the combining assembly are mutually conducted ends, and the second end and the third end of the combining assembly are mutually conducted ends.

2. The antenna connection circuit according to claim 1, wherein the isolation component is a first directional coupler, the satellite receiver is connected to a first end of the first directional coupler, the cellular baseband is connected to a second end of the first directional coupler, a third end of the first directional coupler is connected to a third end of the combining component, the first end and the second end of the first directional coupler are isolated from each other, the first end and the third end of the first directional coupler are coupled to each other, and the second end and the third end of the first directional coupler are straight-through ends.

3. The antenna connection circuit of claim 1, wherein the isolation component comprises a first circulator, a second circulator, and a first coupler, wherein:

the cellular baseband is connected with a first end of the first circulator, a second end of the first circulator is connected with a first end of the second circulator, a second end of the second circulator is connected with a third end of the combining component, a third end of the second circulator is connected with a first end of the first coupler, a second end of the first coupler is connected with the satellite receiver, and a third end of the first coupler is connected with a third end of the first circulator; the first end, the second end and the third end of the first circulator are sequentially arranged in a clockwise direction, the first end, the second end and the third end of the second circulator are sequentially arranged in the clockwise direction, the first end and the second end of the first coupler are mutually coupled ends, and the first end and the third end of the first coupler are mutually straight-through ends.

4. The antenna connection circuit of claim 1, wherein the combining component is a second directional coupler, wherein:

the cellular antenna is connected with the first end of the second directional coupler, the satellite antenna is connected with the second end of the second directional coupler, and the third end of the second directional coupler is connected with the third end of the isolation component; the first end and the third end of the second directional coupler are straight-through ends, the second end and the third end of the second directional coupler are coupling ends, and the first end and the second end of the second directional coupler are isolated ends.

5. The antenna connection circuit of claim 4, further comprising an amplifier, wherein the satellite antenna is connected to a first terminal of the amplifier, and wherein a second terminal of the amplifier is connected to a second terminal of the second directional coupler.

6. The antenna connection circuit of claim 1, wherein the satellite receiver comprises a first mixing module and a first filtering module, wherein:

the first mixing module is used for mixing the signals received by the satellite receiver into first intermediate frequency signals;

the first filtering module is used for filtering the first intermediate frequency signal to obtain a satellite downlink signal.

7. The antenna connection circuit of claim 1, wherein the cellular baseband comprises a second mixing module and a second filtering module, wherein:

the second mixing module is configured to mix a signal received by the cellular baseband into a second intermediate frequency signal;

and the second filtering module is used for filtering the second intermediate frequency signal to obtain a cellular downlink signal.

8. The antenna connection circuit according to claim 1, further comprising: WIFI baseband, first duplexer, second duplexer and WIFI antenna, wherein:

the WIFI baseband is connected with a first end of the first duplexer, a third end of the isolation assembly is connected with a second end of the first duplexer, a third end of the first duplexer is connected with a third end of the second duplexer, a first end of the second duplexer is connected with a third end of the combiner assembly, and a second end of the second duplexer is connected with the WIFI antenna.

9. An antenna connection device, comprising: signal processing module, antenna module and single coaxial line, signal processing module includes honeycomb baseband, satellite receiver and isolation component, antenna module includes satellite antenna, honeycomb antenna and closes way subassembly, wherein:

the satellite receiver is connected with a first end of the isolation assembly, the cellular baseband is connected with a second end of the isolation assembly, a third end of the isolation assembly is connected with a third end of the combining assembly through the single coaxial line, the first end and the second end of the isolation assembly are isolation ends, the second end and the third end of the isolation assembly are conduction ends, and the first end and the third end of the isolation assembly are conduction ends;

the first end of the combining component is connected with the satellite antenna, and the second end of the combining component is connected with the satellite antenna; the first end and the third end of the combiner assembly are conduction ends, the second end and the third end of the combiner assembly are conduction ends, and the first end and the second end of the combiner assembly are isolation ends.

10. An unmanned device comprising an antenna connection circuit according to any of claims 1-8.

Images