Channel optimization method for Q / V frequency band large-scale satellite communication load

Abstract

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spacecraft overall design, and particularly relates to a channel optimization method for Q / V frequency band large-scale satellite communication load. BACKGROUND

[0002] With the continuous development of space communication technology, high-throughput load satellites have a growing proportion in GEO communication satellites due to their superior performance, efficient frequency multiplexing technology and superior communication capacity, and play an important role in space technology applications.

[0003] A high-throughput satellite is composed of a special multi-beam antenna and a multi-path transponder link structure, and its composition principle is as follows:

[0004] A plurality of antenna feeds form a feed array, which is installed on the satellite through an overall support structure, each feed is connected to an N-path transponder input channel, which is sequentially a preselector, a waveguide switch, a low-noise amplifier, and subsequent branching to a hybrid bridge, a multiplexer, and a frequency converter device.

[0005] The output section link includes: a traveling wave tube amplifier assembly (abbreviated as a traveling wave tube amplifier assembly), a waveguide switch assembly, an output multiplexer (or an output filter), and an antenna feed assembly inlet. The device layout state of the output section will directly affect the EIRP value of the satellite. It is necessary to reduce the link length as much as possible to reduce the loss in the process of microwave transmission. Similarly, for satellite Ka / Ku frequency band high-throughput load, TWTA rear-end adopts aluminum alloy waveguide for channel connection. TWTA front-end uses radio frequency cable for connection.

[0006] The current main high-throughput load is mainly in Ka / Ku frequency band. With the continuous growth of communication demand, Q / V frequency band is gradually applied in the next generation of high-throughput load due to its rich bandwidth resources.

[0007] The design method of Q / V frequency band high-throughput load is generally that the forward link input is V frequency band and the output is Ka frequency band, and the return link input is Ka frequency band and the output is Q frequency band.

[0008] Therefore, in the process of Q / V frequency band high-throughput design, due to the high loss of Q / V frequency band signal, the use of aluminum alloy waveguide in the input section and the output section described above is not enough to meet the channel performance requirements.

[0009] The existing patent (publication number: CN202010065511.7) proposes a communication field related to X / Ku frequency band to Q / V frequency band ultra-wideband upconverter, which realizes the purpose of Q / V frequency band upconversion by switch selection, attenuation control and Q / V local oscillator frequency setting through CAN interface, and realizes Q / V frequency band upconversion by switch selection, attenuation control and Q / V local oscillator frequency setting through CAN interface. In the existing patent (publication number: CN202310873702.X), a satellite-ground transmission system including Q / V frequency band link module, Ka frequency band link module, laser link module and signal processing module is proposed. The method adjusts the rate adaptively and switches between links through signal processing load, and improves the maximum efficiency of satellite-ground link.

[0010] Although the above method can realize multiple frequency conversion of Q / V frequency band, and efficient transmission mode and system of Q / V frequency band on satellite, the realization of high-orbit satellite high-throughput load on satellite layout and application requirements are complex, and there are many limitations for the design scheme of Q / V frequency band multi-beam antenna feed and repeater input section device, repeater output device and Q / V frequency band multi-beam antenna feed array, and it is not optimized. SUMMARY

[0011] In order to solve the problems existing in the prior art, the present application provides a channel optimization method for Q / V frequency band large-scale satellite communication load, which has low link loss, high space utilization and high feasibility, and can realize the large-scale application of Q / V frequency band high-throughput load on satellite.

[0012] In order to realize the above technical effects, the present application provides a channel optimization method for Q / V frequency band large-scale satellite communication load, which is applied to a forward input link for processing V frequency band to Ka frequency band signals and a return output link for processing Ka frequency band to Q frequency band signals, comprising:

[0013] The forward input link is designed to be connected in turn V frequency band multi-beam antenna feed array, a plurality of input pre-selectors, V frequency band low noise amplifier input switch ring and V / Ka integrated receiver assembly; the V / Ka integrated receiver assembly is an integrated single machine assembly, and the amplification processing function of the V frequency band low noise amplifier, the switching processing function of the V frequency band low noise amplifier output switch ring, the mixing processing function of the V frequency band hybrid bridge assembly, the switching processing function of the V / Ka frequency converter input switch ring and the frequency conversion processing function of the V / Ka frequency converter are integrated in the integrated single machine assembly; and waveguide connection is adopted between the output end of the V frequency band multi-beam antenna feed array and the input end of the V / Ka integrated receiver assembly;

[0014] The return output link is designed as a Ka / Q frequency converter, a Q frequency channel filter, a Q frequency traveling wave tube amplifier, a switching switch, a Q frequency output duplexer or filter and a Q frequency feed beam connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q frequency channel filter through a waveguide to directly output a plurality of Q frequency channelized signals, and the output end of the Q frequency channel filter is directly connected to the input end of the Q frequency traveling wave tube amplifier through a waveguide.

[0015] Optionally, the waveguide between the output end of the Q frequency traveling wave tube amplifier and the switching switch, the waveguide between the switching switch and the Q frequency output duplexer or the filter and the waveguide between the Q frequency output duplexer or the filter and the Q frequency feed beam are all copper waveguides.

[0016] Optionally, the waveguide used in the forward input link is an aluminum alloy waveguide.

[0017] Optionally, the switching switch is arranged at the output end of the Q frequency traveling wave tube amplifier to realize switching between different Q frequency feed beams.

[0018] Optionally, the output end of the V / Ka integrated receiver assembly is sequentially connected with a Ka frequency input multiplexer, a Ka frequency traveling wave tube amplifier, an isolator and a Ka output multiplexer.

[0019] Optionally, the layout optimization structure is applied to a geostationary orbit high-throughput communication satellite.

[0020] The channel optimization method of the Q / V frequency band large-scale satellite communication load provided by the application combines the single-machine function and the switching function between the V frequency band low-noise amplifier and the V / Ka frequency converter into a V / Ka integrated receiver in the forward input section, thereby greatly saving the path between the antenna feed and the V / Ka frequency converter, improving the realizability of the waveguide on-orbit design and implementation of this part, and optimizing the channel performance; the channel between the Ka / Q frequency converter and the Q frequency TWTA is optimized in the return output section, and part of the switching assembly is combined, thereby improving the realizability of the waveguide on-orbit design and implementation of this part; for the channel working at the rear end of the Q frequency TWTA, the copper waveguide is used to replace the conventional aluminum alloy waveguide, which helps to improve the heat dissipation capacity of the channel and improve the performance of the channel signal. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The schematic diagram of the channel optimization method of the Q / V frequency band large-scale satellite communication load provided by an embodiment of the application;

[0022] Figure 2 The channel schematic diagram of the forward link designed in the conventional state of the prior art.

[0023] Figure 3 The channel schematic diagram of the forward input link design of the channel optimization method of the Q / V frequency band large-scale satellite communication load provided by an embodiment of the present application;

[0024] Figure 4 The channel schematic diagram of the return link design in the prior art conventional state;

[0025] Figure 5 The channel schematic diagram of the return input link design of the channel optimization method of the Q / V frequency band large-scale satellite communication load provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] It should be noted that the description of "one embodiment", "embodiment", "example embodiment" and the like in the specification means that the described embodiment can include a specific feature, structure or characteristic, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in combination with an embodiment, it is indicated that such a feature, structure or characteristic is combined into other embodiments within the knowledge of those skilled in the art, whether or not it is explicitly described.

[0028] In addition, some words are used in the specification and subsequent claims to refer to specific components or parts, and those skilled in the art should understand that manufacturers can use different names or terms to refer to the same component or part. The present specification and subsequent claims do not distinguish components or parts by name, but by functional differences. In the entire specification and subsequent claims, "including" and "containing" are open terms, which should be interpreted as "including but not limited to". In addition, the word "connected" herein includes any direct and indirect electrical connection means. Indirect electrical connection means includes connection through other devices.

[0029] The application further provides a channel optimization method for a Q / V frequency band large-scale satellite communication load. Figure 1 As shown in FIG. 1, the method is applied to a forward input link for processing V frequency band to Ka frequency band signals and a return output link for processing Ka frequency band to Q frequency band signals, and comprises the following steps.

[0030] The forward input link is designed to be connected in sequence with a V frequency band multi-beam antenna array 10, a plurality of input pre-selectors 20, a V frequency band low-noise amplifier input switch ring 30 and a V / Ka integrated receiver assembly 40; the V / Ka integrated receiver assembly 40 is an integrated single-machine assembly, and the V frequency band low-noise amplifier amplification processing function, the V frequency band low-noise amplifier output switch ring switching processing function, the V frequency band hybrid bridge assembly mixing processing function, the V / Ka frequency converter input switch ring switching processing function and the V / Ka frequency converter frequency conversion processing function are integrated in the integrated single-machine assembly; and a waveguide is used to connect between the output end of the V frequency band multi-beam antenna array 10 and the input end of the V / Ka integrated receiver assembly 40.

[0031] The return output link is designed to be connected in sequence with a Ka / Q frequency converter 50, a Q frequency band channel filter 60, a Q frequency band traveling wave tube amplifier 70, a switching switch 80, a Q frequency band output diplexer or filter and a Q frequency band feed beam 100, and the output end of the Ka / Q frequency converter 50 is connected to the input end of the Q frequency band channel filter 60 through a waveguide to directly output a plurality of Q frequency band channelized signals, and the output end of the Q frequency band channel filter 60 is directly connected to the input end of the Q frequency band traveling wave tube amplifier 70 through a waveguide. The identifier 90 shown in the figure can be a Q frequency band output diplexer or a filter.

[0032] Further, the waveguide between the output end of the Q frequency band traveling wave tube amplifier 70 and the switching switch 80, the waveguide between the switching switch 80 and the Q frequency band output diplexer or filter 90 and the waveguide between the Q frequency band output diplexer or filter 90 and the Q frequency band feed beam 100 are all copper waveguides. In this way, for the channel working at the Q frequency band TWTA back end, the copper waveguide is used to replace the conventional aluminum alloy waveguide, which helps to improve the heat dissipation capacity of the channel and improve the performance of the channel signal.

[0033] The waveguide used in the forward input link is an aluminum alloy waveguide.

[0034] The switching switch 80 is arranged at the output end of the Q-band traveling wave tube amplifier 70, and is used for switching between different Q-band feed beams.

[0035] Further, the output end of the V / Ka integrated receiver assembly 40 is connected with a Ka-band input multiplexer, a Ka-band traveling wave tube amplifier, an isolator, a Ka output multiplexer and a Ka-band transmitting antenna in sequence.

[0036] The embodiment is aimed at the high loss pain point of the Q / V-band high-throughput load applied to the GEO orbit satellite, and through optimizing the layout structure of the forward input link and the backward output link, the low loss and high feasibility of the large-scale application are realized.

[0037] Referring to Figure 2 , according to the existing typical high-throughput satellite load design method, the received signal from the V-band feed antenna passes through N input pre-selectors, a V-band low noise amplifier input switch ring, a V-band low noise amplifier, a V-band low noise amplifier output switch ring, a V-band hybrid bridge assembly, a V / Ka frequency converter input switch and a V / Ka frequency converter. In order to reduce the loss of the V-band, the signal uses a waveguide as a transmission channel from the outlet of the feed antenna to the V / Ka frequency converter. Although the waveguide is used for transmission throughout the V-band to reduce the loss, the equipment is scattered in the design (including multiple single machines and multiple switch groups), which leads to a long transmission path from the antenna feed source to the V / Ka frequency converter, a very complex waveguide layout and low realizability of the on-orbit layout, and a large cost of design and implementation.

[0038] The optimization measures of the forward input link provided by the embodiment are shown in Figure 3 , the input signal from the V-band feed antenna passes through N input pre-selectors, a V-band low noise amplifier input switch ring and a V / Ka receiver, and a Ka-band signal is formed. Through link optimization, the channel loss is reduced, the waveguide layout demand is greatly reduced, and the realizability of the load is improved. At the same time, in order to avoid the introduction of additional loss by the radio frequency cable, the entire signal transmission channel from the V-band feed antenna outlet to the V / Ka receiver uses a waveguide.

[0039] The thin lines in the above diagram represent the use of radio frequency cable transmission, and the thick lines represent the use of waveguide transmission.

[0040] Referring to Figure 4, according to the typical high-throughput satellite payload design method, the Ka-band signal, after the Ka / Q converter, forms M Q-band signals, first into the converter output switch assembly, the converted signal passes through the Q-band channel filter or hybrid bridge, enters the backup ring composed of Q-band traveling wave tube amplifiers, including the input switch assembly of the traveling wave tube amplifier, the traveling wave tube amplifier assembly, the output switch assembly of the traveling wave tube amplifier, and finally through the Q-band output diplexer or filter to realize the downlink output of the Q-band feed beam. In order to reduce the loss, the signal after the Ka / Q converter uses waveguide as the transmission channel. Although the aluminum alloy waveguide is used for transmission throughout the Ka / Q converter, the multiple switch assemblies (converter output switch assembly, traveling wave tube amplifier input switch assembly) lead to path redundancy, and the aluminum alloy waveguide has weak heat dissipation capacity, which cannot meet the high-power signal transmission requirements of the Q-band TWTA backend.

[0041] The optimization measures for the return input link provided by the embodiment are as shown in Figure 5 The Ka-band signal, after the Ka / Q converter, forms a Q-band signal, and the converted signal directly forms M channelized signals, which, after the Q-band channel filter, directly enter the Q-band traveling wave tube amplifier. The switching of the feed beam is realized through the switch at the back end of the traveling wave tube amplifier, and finally the downlink output of the feed beam is realized through the Q-band output diplexer or filter. The beneficial effects of the optimization measures are: first, the converter output switch assembly and the traveling wave tube amplifier input switch assembly in the conventional design are omitted, and the characteristics of the Ka / Q converter directly outputting M channelized signals are used to simplify the path; second, the signal transmission path of the Q-band TWTA backend uses copper waveguide instead of conventional aluminum alloy waveguide to improve the heat dissipation capacity; third, all signal transmission paths from the Ka / Q converter to the Q-band output diplexer / filter retain waveguide transmission, which maximally reduces the Q-band signal loss.

[0042] In summary, the channel optimization method for Q / V band large-scale satellite communication payloads provided by this invention is applied to GEO orbit high-throughput satellites. It includes a forward input link and a return output link. The forward link is sequentially connected to a V-band multi-beam antenna feed array, an input preselector, a V-band low-noise amplifier input switch loop, and a V / Ka integrated receiver (integrated low-noise amplifier, output switch loop, hybrid bridge, inverter input switch loop, and inverter). The devices are connected by waveguides. The return link is sequentially connected to a Ka / Q inverter, a Q-band channel filter, a traveling wave tube amplifier, a switching switch, and an output duplexer / filter. The Ka / Q inverter directly outputs multiple Q-band signals via a waveguide-connected filter, and the filter is then connected to the traveling wave tube amplifier via a waveguide. Therefore, in the forward input section, this invention combines the standalone V-band low-noise amplifier and switches between the V-band low-noise amplifier and the V / Ka converter into a single V / Ka integrated receiver, thereby significantly reducing the path length between the antenna feed and the V / Ka converter, improving the feasibility of waveguide routing in this section, and optimizing channel performance. In the reverse output section, the channel between the Ka / Q converter and the Q-band TWTA is optimized by merging some switching components, improving the feasibility of waveguide routing in this section. For the channel operating behind the Q-band TWTA, copper waveguides are used instead of conventional aluminum alloy waveguides, which helps to improve the channel's heat dissipation capacity and enhance the channel signal performance.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present invention is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0044] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A channel optimization method for large-scale Q / V band satellite communication payloads, characterized in that, Applications include a forward input link for processing V-band to Ka-band signals and a reverse output link for processing Ka-band to Q-band signals, comprising: The forward input link is designed as a series of interconnected components: a V-band multi-beam antenna feed array, multiple input preselectors, a V-band low-noise amplifier input switching loop, and a V / Ka integrated receiver assembly. The V / Ka integrated receiver assembly is a single integrated unit that integrates the amplification processing function of the V-band low-noise amplifier, the switching processing function of the V-band low-noise amplifier output switching loop, the hybrid processing function of the V-band hybrid bridge assembly, the switching processing function of the V / Ka inverter input switching loop, and the frequency conversion processing function of the V / Ka inverter. A waveguide connection is used between the output of the V-band multi-beam antenna feed array and the input of the V / Ka integrated receiver assembly. The return output link is designed as follows: a Ka / Q inverter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a switching switch, a Q-band output duplexer or filter, and a Q-band feed beam are connected in sequence. The output of the Ka / Q inverter is connected to the input of the Q-band channel filter through a waveguide to directly output multiple Q-band channelized signals. The output of the Q-band channel filter is directly connected to the input of the Q-band traveling wave tube amplifier through a waveguide.

2. The channel optimization method for Q / V band large-scale satellite communication payloads according to claim 1, characterized in that, The waveguide between the output of the Q-band traveling wave tube amplifier and the switching switch, the waveguide between the switching switch and the Q-band output duplexer or the filter, and the waveguide between the Q-band output duplexer or the filter and the Q-band feed beam are all copper waveguides.

3. The channel optimization method for Q / V band large-scale satellite communication payloads according to claim 1, characterized in that, The waveguide used in the forward input link is an aluminum alloy waveguide.

4. The channel optimization method for Q / V band large-scale satellite communication payloads according to claim 1, characterized in that, The switching switch is located at the output of the Q-band traveling wave tube amplifier to enable switching between different Q-band feed beams.

5. The channel optimization method for Q / V band large-scale satellite communication payloads according to claim 1, characterized in that, The output of the V / Ka integrated receiver assembly is sequentially connected to a Ka-band input multiplexer, a Ka-band traveling wave tube amplifier, an isolator, and a Ka-band output multiplexer.

6. The channel optimization method for Q / V band large-scale satellite communication payloads according to claim 1, characterized in that, The optimized layout structure is applied to geostationary high-throughput communication satellites.

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