High-power mobile broadcasting GEO satellite device and transmission method

Abstract

The invention relates to a high-power mobile broadcasting GEO satellite device and a transmission method. By adopting a compound feed source, the weight of a forward downlink antenna feed source array is reduced by more than 10%. In order to solve the problem brought by high-power components, the design of spatial power synthesis and output multiplex integration and antenna hierarchical power allocation is adopted. By adopting the spatial power synthesis technology, the loss is reduced by 1-2dB, and the synthesis efficiency is improved by about 5%. Through power synthesis and output multiplex integration, the loss is further reduced by 0.7-1dB, and the weight is reduced by 5%. For antenna hierarchical power allocation, components (such as a waveguide) with strong power bearing capacity (at 2000w level) are chosen for front-stage power division, and components (such as coaxial components) with small size and low weight (the size is reduced by more than 50% and the weight is reduced by 10% compared with the use of a waveguide) are chosen for rear-stage power division. In addition, a reverse link provides reverse service transmission capacity for a satellite. The high-power mobile radio GEO satellite device and the transmission method adapt to diversified development of broadcasting satellite service in the future, for example, user feedback, on-demand broadcasting and data acquisition capabilities can be provided. The satellite availability is improved.

Description

technical field [0001] The invention relates to a high-power (above 1500W) mobile broadcasting GEO satellite device and a transmission method, belonging to the technical field of microwave circuits. Background technique [0002] Traditional mobile broadcasting GEO satellite devices and methods have limited service coverage under the same gain: although the antennas for launching satellites have reached about 10 meters in recent years, and can provide sufficient antenna gain under the current technical level, the coverage area and There is still a gap in the demand for mobile satellite broadcasting services in China; because the antenna feed array increases with the frequency drop, the satellites launched in recent years all work in the S-band, such as developing mobile broadcasting services in other frequency bands (such as the lower L-band), The enlarged feed array will put forward higher requirements for the satellite structure layout, so it is more difficult to increase t...

AI Technical Summary

Problems solved by technology

[0003] There is a bottleneck in the design of the power combining module: the power combining of the existing mobile broadcast satellites that can be found in the public information all adopts the multi-level combining method of cable connection, which has high insertion loss and high heat consumption, and it is difficult to ensure the consistency of the amplitude and phase, and the design is complicated, resulting in The combination efficiency is low; the separate design of the power combination module and the multi-channel output multiplexer increases the loss and design difficulty; on the basis of the above-mentioned high-efficiency integrated power combination, the antenna power distribution network needs to be optimized, and the design can adapt to higher power capabilities. Efficient Power Distribution Network

[0004] The lack of return transmission capability limits business expansion: Except for EutelSat10A, other satellites only have forward downlink broadcast links and no return links, which is not conducive to the diversification of satellite services in the future

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