CN213693694U - Signal receiving and transmitting system for satellite ground station - Google Patents
Signal receiving and transmitting system for satellite ground station Download PDFInfo
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- CN213693694U CN213693694U CN202022819377.3U CN202022819377U CN213693694U CN 213693694 U CN213693694 U CN 213693694U CN 202022819377 U CN202022819377 U CN 202022819377U CN 213693694 U CN213693694 U CN 213693694U
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Abstract
The utility model discloses a signal receiving and transmitting system for a satellite ground station, which comprises an antenna feeder unit, a Ka receiving unit and an L receiving and transmitting unit; the Ka receiving unit comprises a first filter, a first amplifier, a mixer, a second filter, a second amplifier, a PLL phase-locked loop, a frequency multiplication filtering module and a Ka receiving chip; the L transceiver unit includes L transmitting module, L receiving module and duplexer, L transmitting module includes L transmitting chip, third amplifier, third wave filter, fourth amplifier and fourth wave filter, L transceiver unit still includes navigation information receiving module, navigation information receiving module includes seventh amplifier, eighth wave filter, eighth amplifier and ninth wave filter. The utility model discloses can realize the signal receiving and dispatching of L wave band, still integrate the signal reception function of Ka wave band simultaneously, have the advantage that the integrated level is high.
Description
Technical Field
The utility model relates to a satellite ground station especially relates to a signal receiving and dispatching system for satellite ground station.
Background
The traditional satellite ground stations are of various types, wherein the small satellite ground station generally only plays roles of observation, relay and the like. One of the most typical small satellite ground stations is the satellite communication Gateway Station (Gateway Station), which functions to connect satellite signals of the satellite communication system with the ground communication network, such as the satellite telephone to the ground cable telephone network or the satellite broadband data to the ground optical fiber network, and performs interpretation, conversion and information exchange with the ground network of the satellite communication system signaling protocol;
the signal receiving and transmitting system of the satellite ground station plays an important role in normal work, but the existing signal receiving and transmitting system of the satellite ground station is single in signal receiving wave band, and has a lot of inconvenience in the application process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a signal receiving and dispatching system for satellite ground station, can realize the signal receiving and dispatching of L wave band, has still integrated the signal reception function of Ka wave band simultaneously, has the advantage that the integrated level is high.
The purpose of the utility model is realized through the following technical scheme: a signal transceiving system for a satellite ground station comprises an antenna feeder unit, a Ka receiving unit and an L transceiving unit;
the Ka receiving unit comprises a first filter, a first amplifier, a mixer, a second filter, a second amplifier, a PLL phase-locked loop, a frequency multiplication filtering module and a Ka receiving chip; the input end of the first filter receives Ka-band signals from the antenna feeder unit, the output end of the first filter is connected with one input end of the frequency mixer through the first amplifier, the input end of the PLL receives a reference clock, the output end of the PLL is connected with the other input end of the frequency mixer through the frequency doubling filtering module, the frequency mixer mixes the input signals to obtain intermediate frequency signals, and the intermediate frequency signals are transmitted to a Ka receiving chip through the second filter and the second amplifier in sequence;
the L receiving and transmitting unit comprises an L transmitting module, an L receiving module and a duplexer, the L transmitting module comprises an L transmitting chip, a third amplifier, a third filter, a fourth amplifier and a fourth filter, the input end of the third amplifier is connected with the L transmitting chip, the output end of the third amplifier is connected with the duplexer sequentially through the third filter, the fourth amplifier and the fourth filter, and the duplexer is connected with the antenna feeder unit; the L receiving module comprises an L receiving chip, a fifth filter, a fifth amplifier, a sixth filter and a sixth amplifier, wherein the input end of the fifth filter receives an L-band signal from the antenna feeder unit, and the output end of the fifth filter is connected with the L receiving chip sequentially through the fifth amplifier, the sixth filter and the sixth amplifier.
Preferably, the antenna feed unit comprises a composite feed source and an antenna matched with the composite feed source, the antenna is a parabolic antenna, and the composite feed source passes through the focus of the parabolic antenna of the bracket; the composite feed source comprises a Ka left-hand circularly polarized feed source, an L left-hand circularly polarized feed source and an L right-hand circularly polarized feed source which are sealed together by adopting a sealing cover;
in the Ka receiving element, the input of first wave filter is connected with Ka levogyration circular polarization feed source, in the L receiving module, the input of fifth wave filter is connected with L levogyration circular polarization feed source, in the L emission module, the duplexer is connected with L dextrorotation circular polarization feed source.
Preferably, the frequency doubling filtering module includes a frequency multiplier and a seventh filter, an input end of the frequency multiplier is connected with an output end of the PLL phase-locked loop, and an output end of the frequency multiplier is connected with the mixer through the seventh filter. The signal receiving and transmitting system also comprises a baseband processing unit which is used for generating baseband transmitting signals, transmitting the baseband transmitting signals to the L transmitting chip and receiving signals obtained by processing from the L receiving chip and the Ka receiving chip. The baseband processing unit adopts an FPGA chip. The L transmitting chip, the L receiving chip and the Ka receiving chip all adopt AD 9361.
The L transceiver unit further comprises a navigation information receiving module, the navigation information receiving module comprises a seventh amplifier, an eighth filter, an eighth amplifier and a ninth filter, the input end of the seventh amplifier is connected with the antenna feeder unit through the duplexer and receives satellite navigation signals from the antenna feeder unit, the output end of the seventh amplifier is connected to a navigation signal output port sequentially through the eighth filter, the eighth amplifier and the ninth filter, and the navigation signal output port is used for being connected with an external navigation information acquisition card.
The utility model has the advantages that: the utility model can realize the signal receiving and transmitting of L wave band, and simultaneously integrates the signal receiving function of Ka wave band, and has the advantage of high integration level; meanwhile, in the communication process with the satellite, the acquisition of navigation signals can be realized, and the method is particularly suitable for a mobile satellite ground station.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a schematic block diagram of a Ka receiver unit;
FIG. 3 is a functional block diagram of an L transceiver unit;
FIG. 4 is a schematic diagram of a layout of a compound feed in an embodiment;
fig. 5 is a schematic diagram of the left-right circular polarization principle of the L-band in the embodiment.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1 to 3, a signal transceiving system for a satellite ground station includes an antenna feeder unit, a Ka receiving unit, and an L transceiving unit;
the Ka receiving unit comprises a first filter, a first amplifier, a mixer, a second filter, a second amplifier, a PLL phase-locked loop, a frequency multiplication filtering module and a Ka receiving chip; the input end of the first filter receives Ka-band signals from the antenna feeder unit, the output end of the first filter is connected with one input end of the frequency mixer through the first amplifier, the input end of the PLL receives a reference clock, the output end of the PLL is connected with the other input end of the frequency mixer through the frequency doubling filtering module, the frequency mixer mixes the input signals to obtain intermediate frequency signals, and the intermediate frequency signals are transmitted to a Ka receiving chip through the second filter and the second amplifier in sequence;
the L receiving and transmitting unit comprises an L transmitting module, an L receiving module and a duplexer, the L transmitting module comprises an L transmitting chip, a third amplifier, a third filter, a fourth amplifier and a fourth filter, the input end of the third amplifier is connected with the L transmitting chip, the output end of the third amplifier is connected with the duplexer sequentially through the third filter, the fourth amplifier and the fourth filter, and the duplexer is connected with the antenna feeder unit; the L receiving module comprises an L receiving chip, a fifth filter, a fifth amplifier, a sixth filter and a sixth amplifier, wherein the input end of the fifth filter receives an L-band signal from the antenna feeder unit, and the output end of the fifth filter is connected with the L receiving chip sequentially through the fifth amplifier, the sixth filter and the sixth amplifier.
In an embodiment of the present application, the antenna feed unit includes a composite feed source and an antenna matched with the composite feed source, the antenna is a parabolic antenna, and the composite feed source passes through a focus of the parabolic antenna of the bracket; the composite feed source comprises a Ka left-hand circularly polarized feed source, an L left-hand circularly polarized feed source and an L right-hand circularly polarized feed source which are sealed together by adopting a sealing cover;
in the Ka receiving element, the input of first wave filter is connected with Ka levogyration circular polarization feed source, in the L receiving module, the input of fifth wave filter is connected with L levogyration circular polarization feed source, in the L emission module, the duplexer is connected with L dextrorotation circular polarization feed source.
In an embodiment of the present application, the frequency doubling filtering module includes a frequency multiplier and a seventh filter, an input end of the frequency multiplier is connected to an output end of the PLL phase-locked loop, and an output end of the frequency multiplier is connected to the mixer through the seventh filter. The signal receiving and transmitting system also comprises a baseband processing unit which is used for generating baseband transmitting signals, transmitting the baseband transmitting signals to the L transmitting chip and receiving signals obtained by processing from the L receiving chip and the Ka receiving chip. The baseband processing unit adopts an FPGA chip. The L transmitting chip, the L receiving chip and the Ka receiving chip all adopt AD 9361.
The L transceiver unit further comprises a navigation information receiving module, the navigation information receiving module comprises a seventh amplifier, an eighth filter, an eighth amplifier and a ninth filter, the input end of the seventh amplifier is connected with the antenna feeder unit through the duplexer and receives satellite navigation signals from the antenna feeder unit, the output end of the seventh amplifier is connected to a navigation signal output port sequentially through the eighth filter, the eighth amplifier and the ninth filter, and the navigation signal output port is used for being connected with an external navigation information acquisition card.
In the embodiment of the application, the Ka left-handed circular polarization feed source is a horn-shaped left-handed circular polarization feed source, the L-band is formed by combining four dual-polarized microstrip feed sources, as shown in fig. 4, the four dual-polarized microstrip feed sources are A, B, C, D respectively, and the feed source in the middle is the Ka left-handed circular polarization feed source; the left-right circular polarization principle of the L-band is shown in fig. 5, a and D combine to receive a horizontally polarized wave, and output a horizontal component, which is recorded as: ex = EmSin (ω t), B and C combine to receive the vertically polarized wave, outputting a vertical component, noted: ey = EmCos (ω t), and the post-synthesis signal direction is tg θ = Ey/Ex = tg (ω t). Corresponding to the rotation of the electric field direction at an angular velocity of ω t. When Ex leads the Ey by 90 degrees, the electric field vector rotates anticlockwise; when Ex lags behind Ey by 90 ° in phase, the electric field vector rotates clockwise; so that right-left hand circular polarization can be formed.
The working principle of the utility model is as follows: in the Ka wave band, the Ka receiving unit filters and amplifies the Ka wave band signal output by the composite feed source, then carries out down-conversion, then carries out filtering and amplification and sends the signal to a Ka receiving chip, and the Ka receiving chip processes the received signal and then transmits the signal to an FPGA chip to complete the receiving of the Ka wave band signal; in the L band: the L receiving unit filters and amplifies the L wave band signal output by the composite feed source twice and then sends the L wave band signal to an L receiving chip, and the signal received by the L receiving chip is processed and then sent to an FPGA chip to complete the signal receiving of the L wave band; sending signals from the FPGA to an L transmitting chip, amplifying and filtering the signals for two times, and feeding the signals to an antenna through a duplexer for wireless transmission; that is to say, the utility model discloses can realize the signal receiving and dispatching of L wave band, still integrate the signal receiving function of Ka wave band simultaneously, have the advantage that the integrated level is high; because the L transceiver unit also comprises the navigation information receiving module, the acquisition of navigation signals can be realized in the communication process with the satellite, and the L transceiver unit is particularly suitable for the ground station of the mobile satellite.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (7)
1. A signal transceiving system for a satellite ground station, characterized by: the antenna comprises an antenna feeder unit, a Ka receiving unit and an L transceiving unit;
the Ka receiving unit comprises a first filter, a first amplifier, a mixer, a second filter, a second amplifier, a PLL phase-locked loop, a frequency multiplication filtering module and a Ka receiving chip; the input end of the first filter receives Ka-band signals from the antenna feeder unit, the output end of the first filter is connected with one input end of the frequency mixer through the first amplifier, the input end of the PLL receives a reference clock, the output end of the PLL is connected with the other input end of the frequency mixer through the frequency doubling filtering module, the frequency mixer mixes the input signals to obtain intermediate frequency signals, and the intermediate frequency signals are transmitted to a Ka receiving chip through the second filter and the second amplifier in sequence;
the L receiving and transmitting unit comprises an L transmitting module, an L receiving module and a duplexer, the L transmitting module comprises an L transmitting chip, a third amplifier, a third filter, a fourth amplifier and a fourth filter, the input end of the third amplifier is connected with the L transmitting chip, the output end of the third amplifier is connected with the duplexer sequentially through the third filter, the fourth amplifier and the fourth filter, and the duplexer is connected with the antenna feeder unit; the L receiving module comprises an L receiving chip, a fifth filter, a fifth amplifier, a sixth filter and a sixth amplifier, wherein the input end of the fifth filter receives an L-band signal from the antenna feeder unit, and the output end of the fifth filter is connected with the L receiving chip sequentially through the fifth amplifier, the sixth filter and the sixth amplifier.
2. A signal transceiving system for a satellite earth station according to claim 1, wherein: the antenna feed unit comprises a composite feed source and an antenna matched with the composite feed source, the antenna is a parabolic antenna, and the composite feed source passes through the focus of the parabolic antenna of the bracket; the composite feed source comprises a Ka left-hand circularly polarized feed source, an L left-hand circularly polarized feed source and an L right-hand circularly polarized feed source which are sealed together by adopting a sealing cover;
in the Ka receiving element, the input of first wave filter is connected with Ka levogyration circular polarization feed source, in the L receiving module, the input of fifth wave filter is connected with L levogyration circular polarization feed source, in the L emission module, the duplexer is connected with L dextrorotation circular polarization feed source.
3. A signal transceiving system for a satellite earth station according to claim 1, wherein: the frequency doubling filtering module comprises a frequency multiplier and a seventh filter, the input end of the frequency multiplier is connected with the output end of the PLL, and the output end of the frequency multiplier is connected with the frequency mixer through the seventh filter.
4. A signal transceiving system for a satellite earth station according to claim 1, wherein: the signal receiving and transmitting system also comprises a baseband processing unit which is used for generating baseband transmitting signals, transmitting the baseband transmitting signals to the L transmitting chip and receiving signals obtained by processing from the L receiving chip and the Ka receiving chip.
5. A signal transceiving system for a satellite earth station according to claim 4, wherein: the baseband processing unit adopts an FPGA chip.
6. A signal transceiving system for a satellite earth station according to claim 1, wherein: the L transmitting chip, the L receiving chip and the Ka receiving chip all adopt AD 9361.
7. A signal transceiving system for a satellite earth station according to claim 1, wherein: the L transceiver unit further comprises a navigation information receiving module, the navigation information receiving module comprises a seventh amplifier, an eighth filter, an eighth amplifier and a ninth filter, the input end of the seventh amplifier is connected with the antenna feeder unit through the duplexer and receives satellite navigation signals from the antenna feeder unit, the output end of the seventh amplifier is connected to a navigation signal output port sequentially through the eighth filter, the eighth amplifier and the ninth filter, and the navigation signal output port is used for being connected with an external navigation information acquisition card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022819377.3U CN213693694U (en) | 2020-11-30 | 2020-11-30 | Signal receiving and transmitting system for satellite ground station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022819377.3U CN213693694U (en) | 2020-11-30 | 2020-11-30 | Signal receiving and transmitting system for satellite ground station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213693694U true CN213693694U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022819377.3U Active CN213693694U (en) | 2020-11-30 | 2020-11-30 | Signal receiving and transmitting system for satellite ground station |
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|---|---|
| CN (1) | CN213693694U (en) |
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- 2020-11-30 CN CN202022819377.3U patent/CN213693694U/en active Active
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