CN213461755U - Satellite signal forwarding simulator - Google Patents
Satellite signal forwarding simulator Download PDFInfo
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- CN213461755U CN213461755U CN202022848774.3U CN202022848774U CN213461755U CN 213461755 U CN213461755 U CN 213461755U CN 202022848774 U CN202022848774 U CN 202022848774U CN 213461755 U CN213461755 U CN 213461755U
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Abstract
A satellite signal repeating simulator, comprising: two GND pins of the radio frequency conversion chip U1 are connected with GND; one end of the capacitor C2 is connected with an RF pin of the radio frequency conversion chip U1, the other end of the capacitor C2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with GND; one end of the capacitor C1 is connected with an LO pin of the radio frequency conversion chip U1, the other end of the capacitor C1 is connected with one end of an inductor L1, and the other end of the inductor L1 is connected with GND; one end of the inductor L3 is connected with an IF pin of the radio frequency conversion chip U1, and the other end of the inductor L3 is used for accessing a local oscillator signal; the other end of the capacitor C2 is used as an input end for introducing satellite uplink signals; the other end of the capacitor C1 is used as an output end to output a satellite downlink signal. The method can be realized in a simulated mode, the input uplink radio frequency signal is converted into the satellite downlink signal according to the local oscillation frequency signal and output, and the method is simple in structure, easy to implement and low in cost.
Description
Technical Field
The utility model relates to a satellite communication especially is relevant with a satellite signal retransmission simulator structure.
Background
The existing satellite communication equipment is tested mainly through actual scene testing and simulation testing at present. Wherein: in the actual scene test, the satellite communication frequency resource is required to be applied, and the satellite communication frequency band signal is actually sent for testing, although the test can comprehensively verify the actual application condition, the frequency resource is limited, so that the application or purchase is required, the use cost is high, and the wide and frequent test use is limited; simulation test can be carried out through a professional instrument at present, but the cost is high, and after simulation processing, certain deviation exists between the simulation test and an actual satellite transmission scene.
SUMMERY OF THE UTILITY MODEL
The utility model discloses mainly to the not enough and defect of above-mentioned relevant prior art, provide a simulator is forwardded to satellite signal, but the simulation is realized, converts the ascending radio frequency signal of input into the down signal output of satellite according to local oscillator frequency signal, simple structure, easy to carry out, it is with low costs.
In order to achieve the above purpose, the utility model adopts the following technology:
a satellite signal repeating simulator, comprising:
two GND pins of the radio frequency conversion chip U1 are connected with GND;
one end of the capacitor C2 is connected with an RF pin of the radio frequency conversion chip U1, the other end of the capacitor C2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with GND;
one end of the capacitor C1 is connected with an LO pin of the radio frequency conversion chip U1, the other end of the capacitor C1 is connected with one end of an inductor L1, and the other end of the inductor L1 is connected with GND;
one end of the inductor L3 is connected with an IF pin of the radio frequency conversion chip U1, and the other end of the inductor L3 is used for accessing a local oscillator signal;
the other end of the capacitor C2 is used as an input end for introducing satellite uplink signals;
the other end of the capacitor C1 is used as an output end to output a satellite downlink signal.
The other end of the inductor L3 is connected with a frequency synthesis module, and the frequency synthesis module is used for simulating and outputting a local oscillator signal of a satellite according to a clock signal.
The inductor L2 and the capacitor C2 are used for realizing the DC blocking and filtering of input signals, and the inductor L1 and the capacitor C1 are used for realizing the DC blocking and filtering of output signals.
The inductor L3 is used to implement blocking of the input local oscillator signal.
The frequency synthesis module is realized by adopting a frequency synthesis chip. The frequency synthesizing chip employs ADF 4360.
The radio frequency conversion chip adopts an HMC 412.
Further, the other end of the inductor L3 is connected to the anode of a diode D2 and the cathode of a diode D1, and the cathode of the diode D2 and the anode of the diode D1 are both connected to GND, so as to protect the current connected to the pin IF of the rf frequency conversion chip U1, thereby protecting the rf frequency conversion chip U1.
The utility model has the advantages that:
the satellite downlink signal conversion device is realized by the radio frequency conversion chip, the interface using mode of the radio frequency conversion chip is changed, the simulation can be realized by matching with corresponding inductance and capacitance, the input uplink radio frequency signal is converted into the satellite downlink signal according to the local oscillation frequency signal, and the satellite downlink signal conversion device is simple in structure, easy to implement and low in cost. The radio frequency device is used for directly processing the radio frequency signal instead of processing the radio frequency signal from frequency conversion to a baseband digital signal, so that the deviation from a real signal generated by multiple frequency conversion processing can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a satellite signal forwarding simulator according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are some embodiments of the present invention, not all embodiments.
The present example provides a satellite signal forwarding simulator, which is implemented by using the circuit structure shown in fig. 1.
Specifically, the satellite signal forwarding simulator of the embodiment is arranged on a circuit board, and the circuit board is provided with a radio frequency conversion chip U1, a capacitor C2, an inductor L2, a capacitor C1, an inductor L1 and an inductor L3.
Specifically, the radio frequency conversion chip U1 adopts the HMC412, which is different from the use of the HMC412 in general, in this example, in order to simulate satellite frequency forwarding, the original LO interface of the chip is used as a satellite downlink signal interface, the original IF interface is used as a local oscillator signal interface, and the original RF interface is used as a satellite uplink signal interface.
And the pin 1 and the pin 8 of the radio frequency conversion chip U1 are both GND interfaces and are both connected with GND.
The pin 7 of the radio frequency conversion chip U1 is an RF interface, the RF interface is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with GND. Meanwhile, the other end of the capacitor C2 is used as an input end for introducing satellite uplink signals. As an example shown in fig. 1, for introducing an upstream signal in the ku band, the impedance is 50 Ω.
Pin 5 of the rf frequency conversion chip U1 is an IF interface, and one end of the inductor L3 is connected to the IF pin of the rf frequency conversion chip U1, and the other end is used for accessing a local oscillator signal. Specifically, the other end of the inductor L3 is connected to a frequency synthesizer module, and the frequency synthesizer module is configured to output a local oscillator signal of the satellite according to the clock signal simulation. The frequency synthesizing module is implemented by using an ADF4360 frequency synthesizing chip, for example, if the clock signal output by the current circuit is 1750M, the ADF4360 frequency synthesizing chip outputs the local oscillation signal of the current main satellite in an analog manner.
Pin 2 of the radio frequency conversion chip U1 is an LO interface, the LO interface is connected to one end of a capacitor C1, the other end of the capacitor C1 is connected to one end of an inductor L1, and the other end of the inductor L1 is connected to GND. Meanwhile, the other end of the capacitor C1 is used as an output end to output a satellite downlink signal. As an example shown in fig. 1, for outputting a ku band downstream signal, the impedance is 50 Ω.
Pin 3, pin 4, and pin 6 of the rf frequency conversion chip U1 are NC interfaces, which are not used in this example.
In the circuit of the example, the inductor L2 and the capacitor C2 are used for realizing the dc blocking and filtering of the input signal, and the inductor L1 and the capacitor C1 are used for realizing the dc blocking and filtering of the output signal. The inductor L3 is used to implement blocking of the input local oscillator signal.
As a preferred mode of this example, the other end of the inductor L3 is connected to the anode of a diode D2 and the cathode of a diode D1, and the cathode of the diode D2 and the anode of the diode D1 are both connected to GND, so as to protect the current connected to the pin IF of the rf frequency conversion chip U1, so as to protect the rf frequency conversion chip U1.
The satellite forwarding simulator provided by the embodiment is realized by a radio frequency conversion chip and a related circuit, and can realize the following simulation: and according to the input satellite local oscillation frequency, converting the input uplink radio frequency signal into a satellite downlink signal for output.
The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A satellite signal repeating simulator, comprising:
two GND pins of the radio frequency conversion chip U1 are connected with GND;
one end of the capacitor C2 is connected with an RF pin of the radio frequency conversion chip U1, the other end of the capacitor C2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with GND;
one end of the capacitor C1 is connected with an LO pin of the radio frequency conversion chip U1, the other end of the capacitor C1 is connected with one end of an inductor L1, and the other end of the inductor L1 is connected with GND;
one end of the inductor L3 is connected with an IF pin of the radio frequency conversion chip U1, and the other end of the inductor L3 is used for accessing a local oscillator signal;
the other end of the capacitor C2 is used as an input end for introducing satellite uplink signals;
the other end of the capacitor C1 is used as an output end to output a satellite downlink signal.
2. The satellite signal forwarding simulator of claim 1, wherein another end of the inductor L3 is connected to a frequency synthesizer module, and the frequency synthesizer module is configured to output a local oscillator signal of a satellite according to a clock signal.
3. The satellite signal repeating simulator of claim 2, wherein the frequency synthesizer module is implemented by a frequency synthesizing chip.
4. The satellite signal repeating simulator of claim 3, wherein the frequency synthesizing chip employs ADF 4360.
5. The satellite signal repeating simulator of claim 1, wherein the rf frequency conversion chip is an HMC 412.
6. The satellite signal forwarding simulator of claim 1, wherein the other end of the inductor L3 is connected to a positive terminal of a diode D2 and a negative terminal of a diode D1, and the negative terminal of the diode D2 and the positive terminal of the diode D1 are both connected to GND.
7. The satellite signal repeating simulator of claim 1, wherein an inductor L2 and a capacitor C2 are used to achieve dc blocking and filtering of the input signal, and an inductor L1 and a capacitor C1 are used to achieve dc blocking and filtering of the output signal.
8. The satellite signal repeating simulator of claim 1, wherein the inductor L3 is configured to block an incoming local oscillator signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022848774.3U CN213461755U (en) | 2020-12-02 | 2020-12-02 | Satellite signal forwarding simulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022848774.3U CN213461755U (en) | 2020-12-02 | 2020-12-02 | Satellite signal forwarding simulator |
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| CN213461755U true CN213461755U (en) | 2021-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115037347A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Dual-band satellite communication simulation transponder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115037347A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Dual-band satellite communication simulation transponder |
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