A space-borne plasma antenna generating and transmitting device and communication method thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
- Publication Date
- 2017-06-06
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Abstract
Description
technical field
[0001] The invention belongs to the field of communication and navigation, in particular to the field of communication and navigation for underwater targets such as submarines. Background technique
[0002] Submarines work in seawater. Since seawater is a conductor, electromagnetic waves in general frequency bands cannot penetrate to a sufficient depth underwater due to the effect of adhesion. Traditional submersible communications use VLF / ELF (very low frequency / ultra low frequency) frequency bands, which can reach a depth of tens of meters or more underwater. However, due to the huge ground-based VLF / ELF antenna equipment, the vast area and the vulnerability to attack, the wartime survivability and combat effectiveness of submarines are greatly limited. Therefore, in recent years the world has begun to study the use of tethered satellites to communicate with submarines from space, but this technology is still in the technical research stage and is far from...