For Microwave Rocket launch, long distance transmission technology of a millimeter‐wave beam is important because the beam is irradiated from ground‐base to the vehicle leaving toward the space. A small aperture leads a large beam divergence and the power density decreased with the altitude. In this study, a 10m beam transmission system was designed with quasi‐optical technology and tested for a sliding thruster. A beam expander composed of a couple of offset parabolic mirrors was applied on the beam transmitter, and the beam narrowed on the vehicle to provide enough power to propel the vehicle. A pulse energy of 400J (400kW and 1ms) was injected to the thruster at the repetition rate of 100Hz for 2s using a 170GHz gyrotron. The position of the thruster set on the horizontal sliding guide was measured using a laser displacement meter. The thrust estimated from the position data showed almost constant thrust for each distance, which shows this quasi‐optical design method is feasible enough to construct a launch demonstration system for Microwave Rocket.
Millimeter‐wave Beam Conversion with Quasi‐optical Mirrors for Microwave Rocket Launch Demonstration
BEAMED ENERGY PROPULSION: Seventh International Symposium ; 2011 ; Ludwigsburg, (Germany)
AIP Conference Proceedings ; 1402 , 1 ; 467-477
10.11.2011
11 pages
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Millimeter-wave beam conversion with quasi-optical mirrors for Microwave Rocket launch demonstration
British Library Conference Proceedings | 2011
|Millimeter-wave driven shock wave for a pulsed detonation Microwave Rocket
British Library Conference Proceedings | 2011
|Millimeter‐wave Driven Shock Wave for a Pulsed Detonation Microwave Rocket
American Institute of Physics | 2011
|Microwave Discharge in Quasi-optical Wave Beam
AIAA | 2007
|