Satellite communication ground equipment circuit system
By centrally transmitting intermediate frequency signals, clock signals, and power signals in satellite communication ground equipment, and using a duplexer to separate clock and OOK signals, the problems of equipment status reporting and signal quality are solved, and information interaction and connection between the equipment and the backend are simplified.
Patent Information
- Application Number
- CN202423182313.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing satellite communication ground equipment cannot report its own status, and the low frequency of the control signal can easily affect the quality of the clock signal. The connection method is also limited and cannot meet the needs of multiple working modes.
The intermediate frequency signal, clock signal, power signal and OOK signal are concentrated on the coaxial cable for transmission by a multiplexing unit, and the clock signal and OOK signal are separated by a duplexer. The addition of the OOK signal enables information interaction between the front-end and back-end devices. The control unit is used to control the switching of the operating frequency band of the radio frequency unit.
It enables two-way information exchange between satellite communication ground equipment and back-end equipment, simplifies the connection method, improves equipment flexibility and signal quality, and reduces spurious performance.
Smart Images
Figure CN223613339U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the field of communication technology, in particular to a satellite communication ground equipment circuit system. BACKGROUND
[0002] Mobile communication satellites can provide communication services between mobile users, such as vehicles, aircraft, ships, and even individuals, and have the advantages of wider coverage, no constraints from geographical obstacles, and no restrictions on user movement.
[0003] Current satellite communication equipment is developing towards global coverage with one device. Because the working frequency of the satellite is different in different regions, the ground equipment needs to switch the corresponding working frequency band in different regions. Figure 1 As shown in the figure, the current control means for satellite communication receiving down-converter equipment is the general method adopted internationally, which is 13V / 18V voltage and +22KHz signal control. The working principle is that the detector and comparator provide different logic levels to the control unit according to the different combinations of 13V / 18V+22kHz received, and the control unit controls the receiving equipment to complete the corresponding switching work according to different logic levels.
[0004] The above-mentioned method has the following defects: (1) limited logic: the current technology can only provide four kinds of available logic, which cannot meet the use requirements of devices with more working modes. (2) easy to affect reference quality: the control signal 22kHz frequency is low, which is transmitted together with the clock signal, which can easily affect the quality of the clock signal, thereby causing the spurious performance of the device to decline. (3) single function: only passive reception of external control, unable to report the state of the device itself, and no information interaction between the front-end receiving equipment and the back-end equipment. Content of the utility model
[0005] The satellite communication ground equipment circuit system provided by the embodiments of the present disclosure solves the problem that the satellite communication ground equipment cannot report the state of the device itself.
[0006] The satellite communication ground equipment circuit system provided by the embodiments of the present disclosure includes a multiplexing unit, a duplexer, a power management unit, a control unit, a modem, and a radio frequency unit,
[0007] The input end of the multiplexing unit is used to receive intermediate frequency signals, OOK signals, clock signals, and power signals through a communication cable. The first output end of the multiplexing unit is used to output intermediate frequency signals to the input / output port of the radio frequency unit. The second output end of the multiplexing unit is used to output power signals to the input end of the power management unit. The power management unit is used to power the radio frequency unit and the control unit,
[0008] The third output end of the multiplexing unit is configured to output the OOK signal and the clock signal to the input end of the diplexer, the first output end of the diplexer is configured to output the clock signal to the clock input end of the radio frequency unit, the second output end of the diplexer is configured to output the OOK signal to the input end of the modem, and the output end of the modem is connected with the communication end of the control unit, and the control unit is configured to control the switching of the working frequency band of the radio frequency unit.
[0009] In an exemplary embodiment of the present disclosure, the multiplexing unit comprises a capacitor C1, an inductor L1, an inductor L2 and a capacitor C2,
[0010] The first end of the capacitor C1 is connected with the input end of the multiplexing unit, the first end of the capacitor C1 is connected with the first end of the inductor L1, and the second end of the capacitor C1 is the first output end of the multiplexing unit,
[0011] The second end of the inductor L1 is connected with the first end of the inductor L2, and the second end of the inductor L2 is the second output end of the multiplexing unit,
[0012] The first end of the capacitor C2 is connected with the second end of the inductor L1, and the second end of the capacitor C2 is the third output end of the multiplexing unit.
[0013] In an exemplary embodiment of the present disclosure, the diplexer comprises a high-pass filter, a low-pass filter, a capacitor C3 and an inductor L3,
[0014] The first end of the capacitor C3 is the input end of the diplexer, the second end of the capacitor C3 is connected with the input end of the high-pass filter, and the output end of the high-pass filter is the first output end of the diplexer,
[0015] The first end of the capacitor C3 is connected with the first end of the inductor L3, the second end of the inductor L3 is connected with the input end of the low-pass filter, and the output end of the low-pass filter is the second output end of the diplexer.
[0016] In an exemplary embodiment of the present disclosure, the high-pass filter is a second-order high-pass filter composed of the inductor L6, the capacitor C5, the inductor L7 and the capacitor C6.
[0017] In an exemplary embodiment of the present disclosure, the low-pass filter is a second-order low-pass filter composed of the capacitor C7, the inductor L4, the capacitor C8 and the inductor L5.
[0018] In an exemplary embodiment of the present disclosure, the circuit system of the satellite communication ground equipment further comprises a diode D1, the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the input end of the diplexer.
[0019] The satellite communication ground equipment circuit system provided by the embodiments of the present disclosure has the following working principles and advantages:
[0020] The embodiments of the present disclosure remove the original 13 / 18V and 22KHz signal control circuit on the basis of the original communication signal, and add an OOK signal, so as to realize the information interaction between the front-end device and the back-end device, that is, the back-end device can control the satellite communication ground equipment, and the satellite communication ground equipment can also report its state signal to the back-end device; meanwhile, the intermediate frequency signal, the clock signal, the power signal and the OOK signal are all transmitted on a coaxial cable (i.e., a communication cable), so as to simplify the connection mode of the front-end device and the back-end device. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] Figure 1 is a principle block diagram of the satellite communication ground equipment circuit system in the prior art;
[0023] Figure 2 is a principle block diagram of the satellite communication ground equipment circuit system provided by an embodiment of the present disclosure;
[0024] Figure 3 is a principle block diagram of the satellite communication ground equipment circuit system provided by another embodiment of the present disclosure. DETAILED DESCRIPTION
[0025] In order to make the personnel in the technical field better understand the present scheme, the technical solutions in the embodiments of the present scheme will be clearly described in combination with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only some of the embodiments of the present scheme, not all. Based on the embodiments in the present scheme, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present scheme.
[0026] The term "comprising" and other any variations thereof in the specification and claims of the present scheme and the above-mentioned drawings means "including but not limited to", which is intended to cover non-exclusive inclusion, and is not limited to the examples listed in the text. In addition, the terms "first" and "second" and the like are used to distinguish different objects, not to describe a specific order.
[0027] The implementation of the present disclosure will be described in detail in combination with specific drawings:
[0028] Figure 2 A principle block diagram of a satellite communication ground equipment circuit system is provided for the embodiments of the present disclosure. Referring to Figure 2 , the satellite communication ground equipment circuit system comprises a multiplexing unit, a diplexer, a power management unit, a control unit, a modem and a radio frequency unit,
[0029] The input end of the multiplexing unit is configured to receive intermediate frequency signals, OOK signals, clock signals and power signals through a communication cable, the first output end of the multiplexing unit is configured to output the intermediate frequency signals to the input / output port of the radio frequency unit, the second output end of the multiplexing unit is configured to output the power signals to the input end of the power management unit, and the power management unit is configured to supply power to the radio frequency unit and the control unit,
[0030] The third output end of the multiplexing unit is configured to output the OOK signals and the clock signals to the input end of the diplexer, the first output end of the diplexer is configured to output the clock signals to the clock input end of the radio frequency unit, the second output end of the diplexer is configured to output the OOK signals to the input end of the modem, the output end of the modem is connected with the communication end of the control unit, and the control unit is configured to control the switching of the working frequency band of the radio frequency unit.
[0031] In the present embodiment, the OOK signals are On-Off Keying signals, which are a commonly used digital modulation method. In this modulation method, the amplitude of the carrier has only two states: carrier output (representing digital "1") and no carrier output (representing digital "0").
[0032] The intermediate frequency signals, the clock signals, the power, and the OOK signals are all connected to the input end of the multiplexing unit through a coaxial cable, and the multiplexing unit can split the above signals, the intermediate frequency signals being output or input signals of the radio frequency unit; the clock signals being used to provide a reference for the local oscillator unit of the frequency converter in the radio frequency unit; the OOK signals being used for communication between the backend device and the satellite communication ground equipment; and the power signals being used to supply power to the entire product.
[0033] The main function of the diplexer is to separate the 2.176MHz OOK signals and the clock signals, and output them to the clock input end of the radio frequency unit and the modem, respectively. The modem is an On-Off Keying coaxial modem transceiver, which is used to demodulate the input OOK signals into TTL level serial signals connected to the control unit, or modulate the TTL level serial signals reported by the control unit into OOK signals (for actively reporting the status of the satellite communication ground equipment), so as to realize the communication between the backend device and the satellite communication ground equipment.
[0034] From the above, the embodiment removes the original 13 / 18V and 22KHz signal control circuit on the basis of the original communication signal, and adds a 2.176MHz OOK signal, realizes the information interaction of front-end and rear-end devices, that is, the rear-end device can control the satellite communication ground device, and the satellite communication ground device can also report its state signal to the rear-end device; meanwhile, the intermediate frequency signal, clock signal, power signal and OOK signal are all transmitted on a coaxial cable (i.e. a communication cable), which can simplify the connection mode of the front-end and rear-end devices.
[0035] Referring to Figure 2 In an example embodiment of the present disclosure, the multiplexing unit includes a capacitor C1, an inductor L1, an inductor L2 and a capacitor C2,
[0036] The first end of the capacitor C1 is connected with the input end of the multiplexing unit, the first end of the capacitor C1 is connected with the first end of the inductor L1, and the second end of the capacitor C1 is the first output end of the multiplexing unit,
[0037] The second end of the inductor L1 is connected with the first end of the inductor L2, and the second end of the inductor L2 is the second output end of the multiplexing unit,
[0038] The first end of the capacitor C2 is connected with the second end of the inductor L1, and the second end of the capacitor C2 is the third output end of the multiplexing unit.
[0039] In the embodiment, the multiplexing unit is composed of C1, L1, L2 and capacitor C2, wherein the intermediate frequency signal reaches the first output end of the multiplexing unit through the capacitor C1; the power signal reaches the second output end of the multiplexing unit through the inductors L1 and L2, and the clock signal and the OOK signal reach the third output end of the multiplexing unit in turn through the inductor L1 and the capacitor C2, thereby realizing the shunt of the intermediate frequency signal, the clock, the OOK signal and the power signal.
[0040] The impedance matching of the circuit can be adjusted by adjusting the parameters of the capacitor C1, the inductor L1 and the inductor L2. In general, the frequency range of the intermediate frequency signal is 950MHz~4000MHz, the frequency range of the clock signal is generally 10MHz~100MHz, and the power voltage range is 10V~30V. C1 is usually about 10pF, L1 is usually 22nH, and L2 is usually 22uH~33uH.
[0041] Referring to Figure 3 In an example embodiment of the present disclosure, the diplexer includes a high-pass filter, a low-pass filter, a capacitor C3 and an inductor L3,
[0042] The first end of the capacitor C3 is the input end of the diplexer, the second end of the capacitor C3 is connected with the input end of the high-pass filter, and the output end of the high-pass filter is the first output end of the diplexer,
[0043] The first end of the capacitor C3 is connected with the first end of the inductor L3, the second end of the inductor L3 is connected with the input end of the low-pass filter, and the output end of the low-pass filter is the second output end of the diplexer.
[0044] In the embodiment, the high-pass filter and the low-pass filter are set to separate the clock signal and the OOK signal by using the frequency difference between the clock signal and the OOK signal, and the capacitor C3 and the inductor L3 are used as the matching capacitor and the matching inductor respectively, and the high-pass filter and the low-pass filter together constitute the diplexer. The clock signal reaches the first output end of the diplexer through the high-pass filter, and the signal is input into the clock input end of the radio frequency unit as the clock signal of the radio frequency unit. The OOK signal reaches the second output end of the diplexer through the low-pass filter, and the signal is converted into the TTL level serial port signal by the modem, and the signal is input into the serial port of the control unit to realize the communication between the backend device and the satellite communication ground equipment.
[0045] Referring to Figure 3 In an exemplary embodiment of the disclosure, the high-pass filter is a second-order high-pass filter composed of the inductor L6, the capacitor C5, the inductor L7 and the capacitor C6.
[0046] In the embodiment, the inductor L6, the capacitor C5, the inductor L7 and the capacitor C6 constitute a second-order high-pass filter, which can more quickly attenuate low-frequency signals and has better selectivity for high-frequency signals.
[0047] In an exemplary embodiment of the disclosure, the low-pass filter is a second-order low-pass filter composed of the capacitor C7, the inductor L4, the capacitor C8 and the inductor L5.
[0048] In the embodiment, the capacitor C7, the inductor L4, the capacitor C8 and the inductor L5 constitute a second-order low-pass filter, which can more effectively prevent high-frequency signals from passing through and enhance the frequency selection effect.
[0049] Referring to Figure 3 In an exemplary embodiment of the disclosure, the circuit system of the satellite communication ground equipment further comprises a diode D1, the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the input end of the diplexer.
[0050] In the embodiment, the intermediate frequency signal, the clock, the OOK signal and the power supply signal are transmitted by using the same communication cable, and the power supply input by the backend device will generate a transient high voltage when the whole system is started, which is easy to damage the clock amplifier or the modem on the satellite communication ground equipment. By adding the low-voltage transient suppression diode D1, the transient high voltage overshoot and interference can be effectively suppressed to protect the backend device.
[0051] The above examples are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the present disclosure has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.
Claims
1. Satellite communications ground equipment circuitry, characterised in that, The multiplexing unit, the diplexer, the power management unit, the control unit, the modem and the radio frequency unit, The input end of the multiplexing unit is used for receiving intermediate frequency signals, OOK signals, clock signals and power signals through a communication cable, the first output end of the multiplexing unit is used for outputting intermediate frequency signals to the input / output port of the radio frequency unit, the second output end of the multiplexing unit is used for outputting power signals to the input end of the power management unit, and the power management unit is used for powering the radio frequency unit and the control unit, The third output end of the multiplexing unit is used for outputting OOK signals and clock signals to the input end of the diplexer, the first output end of the diplexer is used for outputting clock signals to the clock input end of the radio frequency unit, the second output end of the diplexer is used for outputting OOK signals to the input end of the modem, the output end of the modem is connected with the communication end of the control unit, and the control unit is used for controlling the switching of the working frequency band of the radio frequency unit.
2. Satellite communications ground equipment circuitry according to claim 1, characterised in that, The multiplexing unit comprises a capacitor C1, an inductor L1, an inductor L2 and a capacitor C2, The first end of the capacitor C1 is connected with the input end of the multiplexing unit, the first end of the capacitor C1 is connected with the first end of the inductor L1, and the second end of the capacitor C1 is the first output end of the multiplexing unit, The second end of the inductor L1 is connected with the first end of the inductor L2, and the second end of the inductor L2 is the second output end of the multiplexing unit, The first end of the capacitor C2 is connected with the second end of the inductor L1, and the second end of the capacitor C2 is the third output end of the multiplexing unit.
3. The satellite communications ground equipment circuitry of claim 1, wherein, The diplexer comprises a high-pass filter, a low-pass filter, a capacitor C3 and an inductor L3, The first end of the capacitor C3 is the input end of the diplexer, the second end of the capacitor C3 is connected with the input end of the high-pass filter, and the output end of the high-pass filter is the first output end of the diplexer, The first end of the capacitor C3 is connected with the first end of the inductor L3, the second end of the inductor L3 is connected with the input end of the low-pass filter, and the output end of the low-pass filter is the second output end of the diplexer.
4. Satellite communications ground equipment circuitry as claimed in claim 3, characterised in that, The high-pass filter is a second-order high-pass filter composed of the inductor L6, the capacitor C5, the inductor L7 and the capacitor C6.
5. The satellite communications earth equipment circuitry of claim 3 wherein, The low-pass filter is a second-order low-pass filter composed of the capacitor C7, the inductor L4, the capacitor C8 and the inductor L5.
6. The satellite communications ground equipment circuitry of claim 1, wherein, A diode D1 is further included, the anode of the diode D1 is grounded, and the cathode of the diode D1 is connected with the input end of the diplexer.