Satellite Payload Steerable Antenna Switching Network
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Solution Overview
Problem
Military satellite communication systems face challenges in providing flexible, high-bandwidth communication capabilities due to long development times, funding issues, and limited channel bandwidth, especially in supporting Department of Defense requirements, while commercial satellites are optimized for large population centers and have limited coverage in open ocean and sparsely populated areas.
Innovation Solution
A payload system for satellites featuring steerable spot beam and multibeam antennas, coupled with a switching network and control unit, allowing for dynamic beam formation and frequency selection to establish communication links with user terminals in various frequency bands, enhancing bandwidth and coverage flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If commercial satellites are used to augment military capacity, then service availability is improved, but coverage flexibility and military requirement compliance deteriorate
Solution Approach 1:
The patent applies dynamics by making the satellite beams steerable and reconfigurable rather than fixed. The payload system can dynamically adjust beam directions and configurations to adapt to different military operational requirements anywhere within the satellite's field of view, transforming a static coverage pattern into a flexible, on-demand communication capability.
Solution Approach 2:
The patent implements universality by designing a payload system that can serve multiple functions: supporting both military and commercial communications, operating across multiple frequency bands (C, Ku, Ka, V), and providing service to diverse user terminals including mobile, fixed, and maritime platforms. This multi-functional design allows a single satellite to replace multiple specialized systems.
2Device complexity
If fixed beams are used in commercial satellite systems, then system simplicity is maintained, but coverage in open ocean and sparsely populated areas deteriorates
Solution Approach 1:
The patent transforms fixed beams into dynamic, steerable beams that can be repositioned to track user terminals moving across the globe. This allows the system to maintain simple architecture while achieving comprehensive coverage including open ocean and remote areas where fixed beams would be ineffective.
3Ease of manufacture
If traditional Ku-band satellites are used, then existing infrastructure is leveraged, but data rate capability deteriorates
Solution Approach 1:
The patent creates a universal payload system that can operate across multiple frequency bands (C, Ku, Ka, V) rather than being limited to a single band. This allows the satellite to leverage existing Ku-band infrastructure while simultaneously providing high-capacity Ka and V band services, achieving both backward compatibility and forward-looking high data rate capability.
Solution Approach 2:
The patent applies parameter changes by enabling the satellite to switch between different frequency bands and adjust transmission parameters dynamically. This allows the system to adapt to different service requirements, using lower frequency bands for broader coverage and higher frequency bands for high data rate applications, thereby overcoming the limitations of single-band Ku-band satellites.
Data Source
AI summary
A payload (108) to be mounted onto a satellite (102) can include a first steerable antenna (302) providing a downlink to and an uplink from a first user terminal; a second steerable antenna (304) providing a downlink to and an uplink from a second user terminal; a switching network (306) coupling the first steerable antenna to the second steerable antenna; and a payload control unit (120) controlling the switching network to select one of the downlink to the first user terminal provided by the first steerable antenna and the downlink to the second user terminal provided by the second steerable antenna, and one of the uplink from the first user terminal provided by the first steerable antenna and the uplink from the second user terminal provided by the second steerable antenna.