Anti-noise satellite signal forwarding system and equipment
By combining the design of an anti-interference receiving device and a multi-stage series architecture, the problems of complex satellite signal relay system, difficult development and high cost are solved, efficient and low-cost signal processing and anti-interference capabilities are achieved, and the system structure is simplified.
Patent Information
- Application Number
- CN202422510686.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-17
AI Technical Summary
Existing satellite signal relay systems are complex, difficult to develop, costly, have severe signal processing delays, and have weak anti-interference capabilities. Military signals, in particular, require additional hardware support.
It adopts a combination design of anti-interference receiving device, transponder host, independent amplifier, antenna selection unit, filtering unit, low noise amplifier unit, four-way unit, gain control unit and power supply unit, combined with precise simulation calculation and multi-stage series architecture, using surface acoustic wave filter and three-stage amplifier, programmable attenuator and other technical means.
It achieves high-isolation signal forwarding, reduces development difficulty and cost, improves signal processing efficiency and anti-interference ability, and simplifies system structure.
Smart Images
Figure CN223364135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of satellite signal forwarding, and in particular to an anti-noise satellite signal forwarding system and equipment. Background Art
[0002] The regenerative forwarding technology uses an outdoor antenna to receive signals, amplify, select frequencies, resolve, modulate the signals, and finally use the transmitting antenna to provide transmission coverage.
[0003] The current forwarding device system is relatively complex, difficult to develop, high cost, severe signal processing delay, and requires additional hardware support for authorization or military signals. Utility Model Content
[0004] To address the above-mentioned problems, namely, the complexity of the forwarding device system, weak anti-interference capability, high development difficulty, high cost, and severe signal processing delay, the present invention proposes an anti-noise satellite signal forwarding system and device, which includes an anti-interference receiving device, the output end of which is connected to a repeater host for transmitting the received signal to the repeater host, the output end of the repeater host is connected to an independent amplifier, the output end of the independent amplifier is connected to a transmitting antenna, the repeater host includes an antenna selection unit, the input end of the antenna selection unit is connected to the anti-interference receiving device, the output end of the antenna selection unit is connected to a filter unit, the output end of the filter unit is connected to a low-noise amplifier unit, the output end of the low-noise amplifier unit is connected to a four-branch unit, the four-branch unit is provided with four OUT ports, and the OUT ports are connected to the independent amplifier; the system also includes a keyboard display unit, a power supply unit, and a gain control unit, the gain control unit being connected to the antenna selection unit, the four-branch unit, the keyboard display unit, and the power supply unit for corresponding control thereof.
[0005] The present invention is further configured as follows: the antenna selection unit includes two RF input circuits, the output ends of the two RF input circuits are commonly connected to a RF single-pole double-throw switch; the output end of the RF single-pole double-throw switch is electrically connected to the filtering unit.
[0006] The present invention is further configured as follows: the RF input circuit includes a feed network, the gain control unit is electrically connected to the feed network for implementing feed control, the output end of the feed network is connected in series with two RF switches, and the output end of the RF switch is electrically connected to the RF single-pole double-throw switch; the gain control unit is also electrically connected to the RF switch and the RF single-pole double-throw switch for controlling the selective output of the signal.
[0007] The present invention is further configured such that: the filtering unit uses a surface acoustic wave filter.
[0008] The present invention is further configured as follows: the low noise amplifier unit includes three stages of amplifiers, and the three stages of amplifiers are connected in series.
[0009] The present invention is further configured as follows: the four-way branch unit includes four power dividers, the input ends of the four power dividers are electrically connected to the low noise amplifier unit, the output ends of the four power dividers are connected to four RF output circuits, the RF output circuit includes two RF switches connected in series, the gain control unit is electrically connected to the RF switch to control the RF on and off, the output end of the RF switch is electrically connected to a feed network, and the gain control unit is also electrically connected to the feed network to achieve feed control.
[0010] The present invention is further configured as follows: an attenuation unit is further provided between the low noise amplifier unit and the four-branch unit, and the gain control unit is electrically connected to the attenuation unit.
[0011] The present invention is further configured as follows: the attenuation unit includes a three-stage programmable attenuator arranged in series, wherein the programmable attenuator at the input end is electrically connected to the low noise amplifier unit, and the programmable attenuator at the output end is electrically connected to the four-branch unit.
[0012] The present invention also provides a noise-resistant satellite signal forwarding device, which includes the forwarding system as described in any one of the above items.
[0013] The beneficial effects of the utility model are:
[0014] By implementing an antenna selection unit, precise simulation calculations enable matching, shielding, and a multi-stage series architecture for high isolation. By implementing a low-noise amplifier unit, the system reduces added noise and improves the amplifier output P1dB compression point. Furthermore, the three-stage amplifier architecture achieves even more significant gain. This system is relatively simple, easier to develop, and has low development costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Shown is a structural diagram of the system of the utility model.
[0016] Figure 2 A schematic structural diagram of a repeater host system is shown.
[0017] Figure 3 A structural diagram of a power supply unit system is shown.
[0018] Figure 4 A structural diagram of the antenna selection unit system is shown.
[0019] Figure 5 The figure shows a schematic structural diagram of the low noise amplifier unit system.
[0020] Figure 6 A schematic structural diagram of a four-branch unit system is shown.
[0021] Figure 7 It shows the structural diagram of the system in which the transponder host independently processes Beidou signals. DETAILED DESCRIPTION
[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0023] Example 1
[0024] refer to Figure 1 The present invention provides a noise-resistant satellite signal forwarding system and device, including an anti-interference receiving device, the output end of which is electrically connected to a transponder host for transmitting the received signal to the transponder host. The anti-interference receiving device includes two output ports, one for outputting a direct signal and the other for outputting a B3 anti-interference signal. Both output ports of the anti-interference receiving device are also electrically connected to a lightning arrester, which is then connected to the ANT port of the transponder host via the output end of the lightning arrester. The output end of the transponder host is electrically connected to an independent amplifier, and a transmitting antenna is mounted on the output end of the independent amplifier.
[0025] refer to Figure 2 The repeater host includes an antenna selection unit, the input end of which is electrically connected to the anti-interference receiving device, the output end of which is electrically connected to the filtering unit, the output end of which is electrically connected to the low-noise amplifier unit, the output end of which is electrically connected to the four-branch unit, the four-branch unit having four OUT ports, each of which is electrically connected to an independent amplifier. The repeater host also includes a keyboard display unit, a power supply unit, and a gain control unit, wherein the gain control unit is electrically connected to the antenna selection unit, the four-branch unit, the keyboard display unit, and the power supply unit for corresponding control.
[0026] refer to Figure 4 The antenna selection unit includes two RF input circuits, the outputs of which are connected to a single-pole double-throw (SPDT) switch. The output of the SPDT switch is electrically connected to the filter unit. The two RF input circuits are used to transmit a direct signal and a B3 anti-interference signal, respectively. The SPDT switch selects which signal to transmit.
[0027] The RF input circuit includes a feed network, the input of which is connected to the output of the lightning arrester. A gain control unit is electrically connected to the feed network to control the feed. Two RF switches are connected in series to the output of the feed network, and the output of the RF switches is electrically connected to a RF single-pole double-throw switch. The gain control unit is also electrically connected to the RF switch and the RF single-pole double-throw switch to control the selective output of the signal.
[0028] By setting up the antenna selection unit, it is possible to switch between the anti-interference forwarding mode and the direct forwarding mode, that is, to switch between the direct signal from the anti-interference receiving device and the B3 anti-interference signal. At the same time, it also manages the port feeding function.
[0029] To ensure isolation, the antenna selection unit adopts a matching, shielding and multi-stage series structure after precise simulation calculations, so that the isolation is not less than 70dB, thereby avoiding mutual coupling interference between the two signals and enabling the airborne anti-interference receiver to shield the forwarded signal.
[0030] The filtering unit uses a surface acoustic wave filter, which is connected in series to the output end of the antenna selection unit to filter out radio signals outside the L band, further improving the anti-interference ability of the repeater host.
[0031] refer to Figure 5 The low-noise amplifier unit consists of three amplifier stages connected in series. The first stage uses a MOS tube design for an extremely low-noise small-signal amplifier to ensure high gain in the first stage. The second stage uses a dedicated low-noise amplifier to further increase the gain while also raising the P1dB compression point of the amplification link. The final stage uses a power amplifier chip to ensure the link P1dB compression point reaches +9dBm. The low-noise amplifier unit is sealed in an independent cavity and powered by a low-ripple +5V analog power supply. It is used to amplify the weak navigation satellite signals that have been selected and filtered by 80dB. The low-noise amplifier unit can ensure the noise deterioration of the forwarded signal, ensure the interference-to-signal ratio of the CNSS signal, and prevent the airborne anti-interference receiver from shielding the forwarded signal.
[0032] refer to Figure 6 The four-way splitter unit includes four power dividers, the input ends of the four power dividers are electrically connected to the output ends of the low noise amplifier unit, the output ends of the four power dividers are electrically connected to four RF output circuits, the four RF output circuits are arranged in parallel, and the four RF output circuits correspond to four OUT port settings respectively.
[0033] The RF output circuit includes two RF switches connected in series. The gain control unit is electrically connected to the RF switches to control the on / off of the RF in the RF output circuit. The output end of the RF switch is also electrically connected to the feed network, and the gain control unit is also electrically connected to the feed network to implement feed control.
[0034] An attenuation unit is also provided between the low noise amplifier unit and the four-branch unit. The input end of the attenuation unit is electrically connected to the output end of the low noise amplifier unit, the output end of the attenuation unit is electrically connected to the input end of the four-branch unit, and the gain control unit is also electrically connected to the attenuation unit.
[0035] The attenuation unit consists of three programmable attenuators connected in series. The input attenuator is electrically connected to the low-noise amplifier unit, while the output attenuator is electrically connected to the four-way splitter unit. The programmable attenuator has a gain adjustment range of 31.5dB, with each level adjustable in 0.25dB steps. The first half of each attenuator maintains a gain adjustment range of 0-60, while the second half compensates for excess amplifier gain, ensuring accurate output gain.
[0036] The GNSS signal output by the low noise amplifier unit can be program-controlled attenuated and distributed to the four OUT ports through the four-way splitter unit and the attenuation unit, while performing on-off management of the RF channel and port feeding control.
[0037] The gain control unit is an embedded system consisting of a single-chip microcomputer running control software, forming the human-machine interface and driving the various circuits. The gain control unit mainly consists of a single-chip microcomputer minimum system, an IO expansion circuit, and a level conversion circuit.
[0038] refer to Figure 3 The power supply unit provides high-power, low-ripple secondary power voltages (+24V and +5V) to the transponder host and its antenna system. The +24V power supply powers the anti-interference receiver, with an output power of 30W per channel. The +5V power supply provides operating voltage for the transmitting antenna and internal circuit components, with a total power of 25W.
[0039] The power supply unit adopts 220VAC power supply and performs voltage conversion through AC-DC+DC-DC topology, which has the characteristics of high efficiency and low ripple.
[0040] The keyboard display unit is used for the human-machine interface of the repeater host, completing the control and status indication of the repeater system. It is a purchased part, so it will not be described in detail here.
[0041] refer to Figure 7 ,It should be noted that the transponder host can receive satellite signals including Beidou, GPS, Grenas, and Galileo, and process Beidou signals separately from other models.
[0042] Example 2
[0043] This embodiment discloses a noise-resistant satellite signal forwarding device, which includes the forwarding system described in Example 1.
[0044] In summary, the present invention, through the provision of an antenna selection unit, achieves high isolation through precise simulation calculations, matching, shielding, and a multi-stage series architecture. The inclusion of a low-noise amplifier unit reduces amplified noise and improves the amplifier output P1dB compression point. Furthermore, the three-stage amplifier architecture achieves even more significant gain. This system is relatively simple, easier to develop, and has low development costs.
[0045] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.
[0046] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0047] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0048] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.
[0049] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.
Claims
1. A noise-resistant satellite signal forwarding system, comprising an anti-interference receiving device, wherein the output end of the anti-interference receiving device is connected to a transponder host for transmitting received signals to the transponder host, the output end of the transponder host is connected to an independent amplifier, and the output end of the independent amplifier is connected to a transmitting antenna, characterized in that: The repeater host includes an antenna selection unit, the input end of the antenna selection unit is connected to the anti-interference receiving device, the output end of the antenna selection unit is connected to the filtering unit, the output end of the filtering unit is connected to the low noise amplifier unit, the output end of the low noise amplifier unit is connected to the four-way branch unit, the four-way branch unit is provided with four OUT ports, and the OUT ports are connected to the independent amplifier; it also includes a keyboard display unit, a power supply unit and a gain control unit, and the gain control unit is connected to the antenna selection unit, the four-way branch unit, the keyboard display unit and the power supply unit for corresponding control thereof.
2. The noise-resistant satellite signal forwarding system according to claim 1, wherein: The antenna selection unit includes two radio frequency input circuits, and the output ends of the two radio frequency input circuits are commonly connected to a radio frequency single-pole double-throw switch; the output end of the radio frequency single-pole double-throw switch is electrically connected to the filtering unit.
3. The noise-resistant satellite signal forwarding system according to claim 2, wherein: The RF input circuit includes a feed network, the gain control unit is electrically connected to the feed network for implementing feed control, the output end of the feed network is connected in series with two RF switches, and the output end of the RF switch is electrically connected to the RF single-pole double-throw switch; the gain control unit is also electrically connected to the RF switch and the RF single-pole double-throw switch for controlling the selective output of the signal.
4. The noise-resistant satellite signal forwarding system according to claim 1, wherein: The filtering unit is a surface acoustic wave filter.
5. The noise-resistant satellite signal forwarding system according to claim 1, wherein: The low noise amplifier unit includes three stages of amplifiers, and the three stages of amplifiers are connected in series.
6. The noise-resistant satellite signal forwarding system according to claim 1, wherein: The four-branch unit includes four power dividers, the input ends of the four power dividers are electrically connected to the low noise amplifier unit, the output ends of the four power dividers are connected to four RF output circuits, the RF output circuits include two RF switches connected in series, the gain control unit is electrically connected to the RF switch to control the RF on and off, the output end of the RF switch is electrically connected to the feeding network, and the gain control unit is also electrically connected to the feeding network to realize feeding control.
7. The noise-resistant satellite signal forwarding system according to claim 1, wherein: An attenuation unit is further provided between the low noise amplifier unit and the four-branch unit, and the gain control unit is electrically connected to the attenuation unit.
8. The noise-resistant satellite signal forwarding system according to claim 7, wherein: The attenuation unit includes three stages of programmable attenuators connected in series, wherein the programmable attenuator at the input end is electrically connected to the low noise amplifier unit, and the programmable attenuator at the output end is electrically connected to the four-branch unit.
9. A noise-resistant satellite signal forwarding device, characterized in that: The invention comprises a forwarding system as described in any one of claims 1 to 8.