CN112564762A - Signal receiving and transmitting control method of Beidou active antenna - Google Patents
Signal receiving and transmitting control method of Beidou active antenna Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
Abstract
The Beidou active antenna is connected with a Beidou satellite communication terminal through a radio frequency coaxial cable, and the Beidou satellite communication terminal provides a direct current signal with constant voltage for the Beidou active antenna; the signal receiving and transmitting control method comprises the following steps: filtering a first radio frequency signal to be transmitted; acquiring a field intensity signal corresponding to the power of the first radio-frequency signal after filtering processing, and generating a switch control signal based on the field intensity signal; if the switch control signal is a starting signal, performing power amplification processing on the filtered first radio-frequency signal; the first radio-frequency signal after the power amplification is converted into the field signal, and the field signal is transmitted, so that the problem that an antenna power amplifier is prone to damage is solved, the reliability of the Beidou active antenna is improved, and the service life of the Beidou active antenna is prolonged.
Description
Technical Field
The application belongs to the technical field of Beidou satellite communication, and particularly relates to a signal receiving and transmitting control method of a Beidou active antenna.
Background
The Beidou satellite navigation system is a satellite navigation system with independent and independent intellectual property rights in China, and with the rapid development of the Beidou satellite navigation system, various Beidou satellite communication terminals based on the Beidou satellite navigation system are produced at the same time and are widely applied to the fields of electric power, agriculture, water conservancy, sea and land transportation and the like.
Big dipper satellite communication terminal communicates through big dipper antenna and big dipper satellite usually, and in some specific application environment, the unable integration of big dipper antenna is in big dipper satellite communication terminal, need handle the antenna, and traditional solution is connected big dipper satellite communication terminal and big dipper antenna through the radio frequency cable, and this radio frequency cable of accessible transmits radio frequency signal and power signal between big dipper satellite communication terminal and the big dipper antenna like this. And an existing big dipper antenna based on the design of above-mentioned scheme need adopt the low-voltage direct current mode of supply power when being in the signal reception state, need adopt the high-voltage direct current mode of supply power when being in the signal transmission state, can make like this big dipper antenna be in high low-voltage switching state for a long time, causes the damage of antenna power amplifier easily, reduces the reliability of big dipper antenna, shortens big dipper antenna's life.
Disclosure of Invention
In view of this, the embodiment of the application provides a signal receiving and transmitting control method for a Beidou active antenna, so as to solve the problems that the existing Beidou antenna design scheme easily causes damage of an antenna power amplifier, reduces the reliability of the Beidou antenna, and shortens the service life of the Beidou antenna.
The embodiment of the application provides a signal receiving and transmitting control method of a Beidou active antenna, wherein the Beidou active antenna is connected with a Beidou satellite communication terminal through a radio frequency coaxial cable, and the Beidou satellite communication terminal provides a direct current signal with constant voltage for the Beidou active antenna; the signal transceiving control method comprises the following steps:
filtering a first radio frequency signal to be transmitted;
acquiring a field intensity signal corresponding to the power of the first radio-frequency signal after filtering processing, and generating a switch control signal based on the field intensity signal;
if the switch control signal is a starting signal, performing power amplification processing on the filtered first radio-frequency signal;
and converting the first radio frequency signal after the power amplification treatment into a field signal, and transmitting the field signal.
Optionally, the obtaining a field strength signal corresponding to the power of the filtered first radio frequency signal, and generating a switch control signal based on the field strength signal includes:
performing field intensity induction on the first radio-frequency signal after filtering processing to obtain a field intensity signal, and converting the field intensity signal into a corresponding induction level;
and generating the switch control signal according to the induction level and a preset level threshold.
Optionally, the generating the switch control signal according to the sensing level and a preset level threshold includes:
and generating a starting signal when the induction level is determined to be greater than or equal to the preset level threshold.
Optionally, the generating the switch control signal according to the sensing level and a preset level threshold includes:
and generating a turn-off signal when the induction level is determined to be smaller than the preset level threshold.
Optionally, the frequency of the first radio frequency signal is within a preset L frequency band.
Optionally, the center frequency of the L-band is 1615.68 mhz.
Optionally, the signal transceiving control method further includes:
receiving a second radio frequency signal;
preprocessing the second radio frequency signal, and sending the preprocessed second radio frequency signal to the Beidou satellite communication terminal; wherein the preprocessing at least comprises filtering processing and power amplification processing.
Optionally, the frequency of the second radio frequency signal is within a preset S frequency band.
Optionally, the center frequency of the S band is 2491.75 mhz.
The implementation of the signal receiving and transmitting control method of the Beidou active antenna provided by the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a big dipper active antenna's signal receiving and dispatching control method, big dipper active antenna passes through the radio frequency coaxial cable and is connected with big dipper satellite communication terminal, because the power stool and urine based on the first radio frequency signal that treats the transmission can realize the automatic amplification control to the power of first radio frequency signal, thereby realized the automatic switch-over control to big dipper active antenna's signal receiving and dispatching state, therefore big dipper satellite communication terminal can provide the DC signal of voltage invariant for big dipper active antenna, make big dipper active antenna work under constant voltage state all the time, thereby can effectively solve the fragile problem of antenna power amplifier, big dipper active antenna's reliability has been improved, big dipper active antenna's life has been prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a connection relationship between a beidou active antenna and a beidou satellite communication terminal provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a Beidou active antenna provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of another Beidou active antenna provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of a Beidou active antenna according to another embodiment of the present application;
fig. 5 is a schematic flow chart of a signal transceiving control method of a Beidou active antenna provided in an embodiment of the present application;
fig. 6 is a flowchart of an implementation of S52 in a method for controlling signal transmission and reception of a Beidou active antenna according to the embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
It should also be appreciated that reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a connection relationship between a Beidou active antenna and a Beidou satellite communication terminal according to an embodiment of the present application. As shown in fig. 1, the beidou active antenna 10 provided in the embodiment of the present application may be connected to a beidou satellite communication terminal 30 through a radio frequency coaxial cable 20. By way of example and not limitation, the Beidou satellite communication terminal 30 may be an electricity metering device for collecting electrical parameter values recorded by an electricity meter.
Specifically, the Beidou active antenna 10 is provided with a unique communication interface, namely a radio frequency interface 11. The type of the radio frequency interface 11 may be set according to actual requirements, and is not limited herein, for example, the type of the radio frequency interface 11 may be a Nut (Nut, N) type interface, a miniature precision version a (SMA) interface, or a radio frequency interface (TNC interface) of TNC electrical corporation.
The Beidou active antenna 10 is connected with one end of a radio frequency coaxial cable 20 through a radio frequency interface 11 of the Beidou active antenna, and the other end of the radio frequency coaxial cable 20 is connected with a Beidou satellite communication terminal 30. Radio frequency signals and direct current signals can be transmitted between the Beidou active antenna 10 and the Beidou satellite communication terminal 30 through the radio frequency coaxial cable 20, namely, transmission of two different signals can be realized by connecting one radio frequency coaxial cable 20 between the Beidou active antenna 10 and the Beidou satellite communication terminal 30, so that the cost can be reduced, and the installation is convenient.
In the embodiment of the application, big dipper satellite communication terminal 30 provides the invariable direct current signal of voltage for big dipper active antenna 10, no matter big dipper active antenna 10 is in signal reception state or signal transmission state promptly, big dipper satellite communication terminal 30 is unchangeable all the time for the voltage of the direct current signal of big dipper active antenna 10 provides, can effectively solve the fragile problem of antenna power amplifier like this, the reliability of big dipper active antenna has been improved, big dipper active antenna's life has been prolonged.
Please refer to fig. 2, fig. 2 is a schematic structural diagram of a Beidou active antenna according to an embodiment of the present application. As shown in fig. 2, the beidou active antenna 10 may include a transmitting module 12 and a receiving module 13.
The transmitting module 12 specifically includes:
the filtering unit 121 is configured to perform filtering processing on the first radio frequency signal to be transmitted.
And the switching control unit 122 is connected to the filtering unit 121 and the power amplifying unit 123, and is configured to acquire a field strength signal corresponding to the power of the filtered first radio frequency signal, and perform switching control on the power amplifying unit 123 based on the field strength signal.
And the power amplifying unit 123 is connected to the filtering unit 121 and the switch control unit 122, and is configured to perform power amplification processing on the filtered first radio frequency signal after being turned on.
And the passive transmitting antenna 124 is connected to the power amplifying unit 123, and is configured to convert the first radio frequency signal after the power amplification process into a field signal and transmit the field signal.
In this embodiment of the application, because the signal transmission frequency of big dipper active antenna 10 needs to be in the L frequency channel, consequently, filtering unit 121 receives the first radio frequency signal back that comes from big dipper satellite communication terminal 30, filters the clutter that the frequency is not in the L frequency channel in the first radio frequency signal, and in this embodiment of this application, the frequency of first radio frequency signal is in the L frequency channel promptly. In a specific application, the center frequency of the L-band may be 1615.68 megahertz (MHz), and the L-band may be 1615.68MHz ± 4.08 MHz.
In this embodiment of the application, the field strength value of the field strength signal corresponding to the power of the first radio frequency signal acquired by the switch control unit 122 is positively correlated with the power of the first radio frequency signal, that is, when the power of the first radio frequency signal after filtering is higher, the field strength value of the field strength signal corresponding to the power of the first radio frequency signal is higher; when the power of the first radio-frequency signal after the filtering processing is smaller, the field intensity value of the field intensity signal corresponding to the power of the first radio-frequency signal is smaller.
In specific application, when the Beidou satellite communication terminal 30 transmits a radio frequency signal through the Beidou active antenna 10, the power of the first radio frequency signal output by the filtering unit 121 is usually large, and at this time, the field intensity value of the field intensity signal corresponding to the power of the first radio frequency signal acquired by the switch control unit 122 is also large; when the big dipper active antenna 10 does not transmit the radio frequency signal, the power of the first radio frequency signal output by the filtering unit 121 is usually small, and at this time, the field strength value of the field strength signal corresponding to the power of the first radio frequency signal acquired by the switch control unit 122 is also small.
Therefore, in an embodiment of the present application, when detecting that the field strength value of the field strength signal corresponding to the power of the first radio frequency signal is greater than the preset field strength threshold, it indicates that the Beidou active antenna needs to transmit the radio frequency signal to the outside at this time, so that the switch control unit 122 can control the power amplification unit 123 to turn on, so that the power amplification unit 123 performs power amplification processing on the filtered first radio frequency signal, and further, the power of the first radio frequency signal output by the power amplification unit 123 meets the transmission requirement.
In another embodiment of the present application, when detecting that the field intensity value of the field intensity signal corresponding to the power of the first radio frequency signal is greater than the preset field intensity threshold, the switch control unit 122 indicates that the Beidou active antenna does not need to emit a radio frequency signal outwards at this time, and therefore the switch control unit 122 can control the power amplification unit 123 to be turned off, so as to reduce the power consumption of the Beidou active antenna.
This application embodiment can realize the automatic switch control to power amplification unit 123 based on the power size of the first radio frequency signal that emission module 12 received to realized the automatic switch-over control to big dipper active antenna's signal receiving and dispatching state, can also reduce big dipper active antenna's consumption simultaneously.
Please refer to fig. 3, fig. 3 is a schematic structural diagram of a beidou active antenna according to another embodiment of the present application. As shown in fig. 3, in this embodiment, the switch control unit 122 may specifically include:
and the second field intensity induction subunit 1221 is connected to the filtering unit 121, and is configured to perform field intensity induction on the filtered first radio-frequency signal to obtain a field intensity signal, and convert the field intensity signal into a corresponding induction level.
A power amplifier switch control subunit 1222, connected to the second field strength sensing subunit 1221 and the power amplifying unit 123, for generating a switch control signal according to the sensing level and a preset level threshold; the switch control signal is used to control the power amplification unit 123 to be turned on or off.
In a specific application, the second field strength sensing subunit 1221 may be a field strength detection circuit, and the field strength detection circuit may convert the sensed field strength signal into a corresponding sensing level according to a conversion relationship between a field strength value of the field strength signal and the sensing level. Wherein, the larger the field intensity value of the field intensity signal is, the higher the corresponding induction level is. In a specific application, the field intensity detection circuit can be composed of a detection circuit and a filter circuit.
In this embodiment, the power amplifier switch control subunit 1222 compares the sensing level output by the second field strength sensing subunit 1221 with a preset level threshold after receiving the sensing level.
The preset level threshold may be determined according to an induced level corresponding to the radio frequency signal output by the filtering unit 121 when the big dipper active antenna 10 transmits the radio frequency signal.
In one implementation manner of this embodiment, the power amplifier switch control subunit 1222 may generate a turn-on signal when it is determined that the sensing level is greater than or equal to the preset level threshold; the turn-on signal is used to control the power amplification unit 123 to turn on. In another implementation manner of this embodiment, the power amplifier switch control subunit 1222 may generate a turn-off signal when it is determined that the sensing level is less than the preset level threshold; the shutdown signal is used to control the power amplifying unit 123 to be turned off.
Referring to fig. 3, in another embodiment of the present application, the receiving module 13 may include:
and a passive receiving antenna 132 for receiving the second rf signal.
The receiving channel 131 is connected with the passive receiving antenna and used for preprocessing the second radio frequency signal and sending the preprocessed second radio frequency signal to the Beidou satellite communication terminal; the preprocessing at least comprises filtering processing and power amplification processing.
In this embodiment, the passive receiving antenna 132 may specifically convert the field signal based on the electromagnetic field transmission mode into the radio frequency signal based on the path transmission mode, so as to receive the second radio frequency signal.
In this embodiment, since the signal receiving frequency of the Beidou active antenna 10 needs to be within the S frequency band, the frequency of the second radio frequency signal needs to be within the S frequency band. In a specific application, the center frequency of the S band may be 2491.75MHz, and the S band may be 2491.75MHz ± 4.08 MHz.
In specific application, the receiving path 131 may perform filtering processing on a clutter signal of the second radio frequency signal, where the frequency is not within the S frequency band, and perform power amplification processing on the filtered second radio frequency signal, so that the power of the second radio frequency signal meets the signal receiving requirement of the Beidou active antenna.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a Beidou active antenna according to another embodiment of the present application. As shown in fig. 4, in this embodiment, the beidou active antenna 10 further includes:
and the feed module 14 is connected with the Beidou satellite communication terminal 30 and used for separating the radio frequency signal and the direct current signal transmitted between the Beidou active antenna 10 and the Beidou satellite communication terminal 30.
And the combining module 15 is connected with the feeding module 14, the transmitting module 12 and the receiving module 13, and is used for combining the radio frequency signals of different frequency bands transmitted by the Beidou active antenna 10.
And the power supply processing module 16 is connected with the feeding module 14, the transmitting module 12 and the receiving module 13, and is used for outputting a direct current signal with constant voltage to the transmitting module 12 and the receiving module 13.
In this embodiment, the feed module 14 separates the radio frequency signal and the direct current signal transmitted between the Beidou active antenna 10 and the Beidou satellite communication terminal 30, so that the radio frequency signal and the direct current signal are isolated from each other and are not affected by each other.
The combining module 15 is specifically configured to combine the radio frequency signal in the L frequency band and the radio frequency signal in the S frequency band, so that the two signals are transmitted on the same radio frequency link.
The power processing module 16 can process the dc signal with constant voltage provided by the beidou satellite communication terminal 30, and provide a constant working voltage for the transmitting module 12 and the receiving module 13.
It should be noted that the power processing module 16 supplies power to other modules in the beidou active antenna 10 in addition to the transmitting module 12 and the receiving module 13.
Based on the Beidou active antenna provided by the embodiment, the embodiment of the application further provides a signal receiving and transmitting control method based on the Beidou active antenna. Referring to fig. 5, fig. 5 is a schematic flow chart of a method for controlling signal transceiving of a Beidou active antenna according to an embodiment of the present application. In this embodiment, big dipper active antenna passes through the radio frequency coaxial cable and is connected with big dipper satellite communication terminal, and big dipper satellite communication terminal provides the DC signal of the invariable direct current of voltage for big dipper active antenna.
As shown in fig. 5, the signal transceiving control method may include S51 to S54, which are detailed as follows:
s51: and filtering the first radio frequency signal to be transmitted.
S52: and acquiring a field intensity signal corresponding to the power of the first radio-frequency signal after filtering, and generating a switch control signal based on the field intensity signal.
S53: and if the switch control signal is a starting signal, performing power amplification processing on the filtered first radio-frequency signal.
S54: and converting the first radio frequency signal after the power amplification treatment into a field signal, and transmitting the field signal.
It should be noted that S51, S52, S53, and S54 in this embodiment may be respectively implemented by the filtering unit 121, the switch control unit 122, the power amplifying unit 123, and the passive transmitting antenna 124 in the embodiment corresponding to fig. 2, and therefore, the specific implementation process of S51 to S54 may refer to the related description of the embodiment corresponding to fig. 2, and is not described again here.
In a possible implementation manner of this embodiment, S52 may specifically include S61 to S62 shown in fig. 6, which are detailed as follows:
s61: and carrying out field intensity induction on the first radio-frequency signal after the filtering processing to obtain a field intensity signal, and converting the field intensity signal into a corresponding induction level.
S62: and generating the switch control signal according to the induction level and a preset level threshold.
In a possible implementation manner of this embodiment, S62 may specifically include the following steps:
and generating a starting signal when the induction level is determined to be greater than or equal to the preset level threshold.
In another possible implementation manner of this embodiment, S62 may specifically include the following steps:
and generating a turn-off signal when the induction level is determined to be smaller than the preset level threshold.
It should be noted that, in this embodiment, S61 and S62 may be implemented by the second field strength sensing subunit 1221 and the power amplifier switch control subunit 1222 in the embodiment corresponding to fig. 3, respectively, and therefore, specific implementation processes of S61 and S62 may refer to the relevant description of the embodiment corresponding to fig. 3, and are not described herein again.
In another possible implementation manner of this embodiment, the method for controlling signal transmission and reception of the Beidou active antenna may further include the following steps:
receiving a second radio frequency signal;
preprocessing the second radio frequency signal, and sending the preprocessed second radio frequency signal to the Beidou satellite communication terminal; wherein the preprocessing at least comprises filtering processing and power amplification processing.
The frequency of the second radio frequency signal is within a preset S-band, and the center frequency of the S-band is 2491.75 mhz.
It should be noted that, steps in this embodiment may be implemented by the passive receiving antenna 132 and the receiving path 131 in the embodiment corresponding to fig. 3, respectively, and therefore, a specific implementation process of each step in this embodiment may refer to the description related to the embodiment corresponding to fig. 3, and is not described herein again.
Above can find out, the big dipper active antenna's that this application embodiment provided signal receiving and dispatching control method, big dipper active antenna passes through the radio frequency coaxial cable and is connected with big dipper satellite communication terminal, because the power urine and urine based on the first radio frequency signal that waits to launch can realize the automatic amplification control to the power of first radio frequency signal, thereby realized the automatic switch-over control to big dipper active antenna's signal receiving and dispatching state, therefore big dipper satellite communication terminal can provide the DC signal of voltage invariant for big dipper active antenna, make big dipper active antenna work under constant voltage state all the time, thereby can effectively solve the problem that antenna power amplifier is fragile, big dipper active antenna's reliability has been improved, big dipper active antenna's life has been prolonged.
In the above embodiments, the description of each embodiment has its own emphasis, and parts that are not described or illustrated in a certain embodiment may refer to the description of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (9)
1. The signal receiving and transmitting control method of the Beidou active antenna is characterized in that the Beidou active antenna is connected with a Beidou satellite communication terminal through a radio frequency coaxial cable, and the Beidou satellite communication terminal provides a direct current signal with constant voltage for the Beidou active antenna; the signal transceiving control method comprises the following steps:
filtering a first radio frequency signal to be transmitted;
acquiring a field intensity signal corresponding to the power of the first radio-frequency signal after filtering processing, and generating a switch control signal based on the field intensity signal;
if the switch control signal is a starting signal, performing power amplification processing on the filtered first radio-frequency signal;
and converting the first radio frequency signal after the power amplification treatment into a field signal, and transmitting the field signal.
2. The signal transceiving control method of claim 1, wherein the obtaining a field strength signal corresponding to the power of the first radio frequency signal after the filtering, and generating a switch control signal based on the field strength signal comprises:
performing field intensity induction on the first radio-frequency signal after filtering processing to obtain a field intensity signal, and converting the field intensity signal into a corresponding induction level;
and generating the switch control signal according to the induction level and a preset level threshold.
3. The signal transceiving control method of claim 2, wherein the generating the switching control signal according to the sensing level and a preset level threshold comprises:
and generating a starting signal when the induction level is determined to be greater than or equal to the preset level threshold.
4. The signal transceiving control method of claim 2, wherein the generating the switching control signal according to the sensing level and a preset level threshold comprises:
and generating a turn-off signal when the induction level is determined to be smaller than the preset level threshold.
5. The signal transceiving control method of claim 1, wherein a frequency of the first radio frequency signal is within a preset L-band.
6. The signal transmission/reception control method according to claim 5, wherein the center frequency of the L band is 1615.68 MHz.
7. The signal transmission/reception control method according to claim 1, further comprising:
receiving a second radio frequency signal;
preprocessing the second radio frequency signal, and sending the preprocessed second radio frequency signal to the Beidou satellite communication terminal; wherein the preprocessing at least comprises filtering processing and power amplification processing.
8. The signal transceiving control method of claim 7, wherein a frequency of the second radio frequency signal is within a preset S-band.
9. The signal transmission/reception control method according to claim 8, wherein the S-band has a center frequency of 2491.75 mhz.
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Application publication date: 20210326 |