| 摘要 |
A system in which the characteristics of a microwave power transmission beam are controlled in accordance with power distribution profiles altered due to the detected presence or entrance of an object into the beam which causes changes that are perceived in various received, reflected and scattered power distribution profiles resulting over various receiving elements of the system. An analysis of these changes is made, the results of which are used to reshape, dim or douse the power beam in accordance with predetermined criteria. Additionally, a "FAIL SAFE" condition is obtained by employing a beam penetration tester, whose function is to repeatedly test the correct performance of the beam intrusion detecting scheme by presenting a minimal threshold scattering or absorbing cross section while crossing the power beam. If the beam penetration tester is undetected by the beam safety system, then the beam control is preconditioned to turn off the power beam. Conversely, if the beam penetration tester is successfully detected, then the power beam is allowed to remain on. The system comprises a microwave power beam radiator array, a microwave power beam receiving antenna array, the radiator array in one embodiment being located on an orbiting spacecraft and the receiving array being located at a ground station. Another embodiment provides a ground based transmitting array and a receiving array aboard an aircraft or airship.
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