CN112260714A - Signal receiving and transmitting system for satellite ground station - Google Patents
Signal receiving and transmitting system for satellite ground station Download PDFInfo
- Publication number
- CN112260714A CN112260714A CN202011370289.8A CN202011370289A CN112260714A CN 112260714 A CN112260714 A CN 112260714A CN 202011370289 A CN202011370289 A CN 202011370289A CN 112260714 A CN112260714 A CN 112260714A
- Authority
- CN
- China
- Prior art keywords
- filter
- amplifier
- receiving
- transmitting
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a signal transceiving system for a satellite ground station, which 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 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 invention can realize the signal receiving and transmitting of the L waveband, integrates the signal receiving function of the Ka waveband and has the advantage of high integration level.
Description
Technical Field
The invention relates to a satellite ground station, in particular to a signal receiving and transmitting system for the 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.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a signal receiving and transmitting system for a satellite ground station, which can realize the signal receiving and transmitting of an L waveband and also integrates the signal receiving function of a Ka waveband, and has the advantage of high integration level.
The purpose of the invention is realized by 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 the Ka receiving chip through the second filter and the second amplifier in sequence to be connected;
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 processed by 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 invention has the beneficial effects that: the invention can realize the signal receiving and transmitting of the L wave band, and simultaneously integrates the signal receiving function of the Ka wave band, thereby having 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 functional 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 solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
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 the Ka receiving chip through the second filter and the second amplifier in sequence to be connected;
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 processed by 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 invention 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 invention can realize the signal receiving and transmitting of the L wave band, and also integrates the signal receiving function of the Ka wave band, and has the advantage of high integration level; 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 this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
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 the Ka receiving chip through the second filter and the second amplifier in sequence to be connected;
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 processed by the L receiving chip and the Ka receiving chip.
5. A signal transceiving system for a satellite earth station according to claim 1, 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 |
|---|---|---|---|
| CN202011370289.8A CN112260714A (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 |
|---|---|---|---|
| CN202011370289.8A CN112260714A (en) | 2020-11-30 | 2020-11-30 | Signal receiving and transmitting system for satellite ground station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112260714A true CN112260714A (en) | 2021-01-22 |
Family
ID=74225635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011370289.8A Pending CN112260714A (en) | 2020-11-30 | 2020-11-30 | Signal receiving and transmitting system for satellite ground station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112260714A (en) |
-
2020
- 2020-11-30 CN CN202011370289.8A patent/CN112260714A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6268946B1 (en) | Apparatus for communicating diversity signals over a transmission medium | |
| CN111903231B (en) | Method suitable for unmanned reconnaissance aircraft measurement and control and information transmission line-of-sight data link signal | |
| US10644728B2 (en) | Analog processing system for massive-MIMO | |
| CN106357320A (en) | Satellite ground station transceiver and satellite communication system | |
| CN105744333A (en) | LNB module used for receiving satellite television signals and corresponding satellite television set top box | |
| CN206164528U (en) | Wireless communication system and use this wireless communication system's unmanned aerial vehicle system | |
| CN111431584A (en) | Satellite mobile communication terminal based on radio frequency transceiver chip module | |
| CN106060678A (en) | Direct-broadcast satellite television broadcast receiving system LNB (Low Noise Block) module and satellite television set top box | |
| CN212969627U (en) | Antenna feed system and antenna kit of vehicle-mounted satellite communication antenna for communication in motion | |
| CN110149121B (en) | Adjustable ultra-wideband zero intermediate frequency transceiver radio frequency analog front end | |
| CN109495179B (en) | X-band wide-band high-capacity communication device | |
| CN102340467B (en) | Method for calibrating mismatched modem | |
| CN213693694U (en) | Signal receiving and transmitting system for satellite ground station | |
| CN113131994A (en) | Integrated intelligent shipborne satellite communication system | |
| CN112260714A (en) | Signal receiving and transmitting system for satellite ground station | |
| RU2715554C1 (en) | Transported tropospheric station | |
| CN112653502B (en) | Portable terminal radio frequency channel based on frequency coordination | |
| CN209088077U (en) | A kind of novel DVBS2 carrier wave seeks star module and star searching system | |
| JP5064477B2 (en) | Wireless communication system and wireless communication apparatus | |
| CN210807271U (en) | Positioning antenna device based on Beidou short message mobile communication | |
| CN213484884U (en) | Economical plug-and-play wireless signal forwarding device | |
| RU118494U1 (en) | DIGITAL COMMUNICATION ON-BOARD COMPLEX | |
| US5991606A (en) | Apparatus for filtering signals of an antenna arrangement and a sender/receiver arrangement with two or more antennae | |
| CN114978831B (en) | Signal demodulation circuit and coherent demodulator | |
| CN220775828U (en) | 9GHz communication unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |